Báo cáo Thực tập tại Trạm biến áp 500kV Hà Tĩnh

1: 0.4 A HÖ sè h·m K1: 30% Dßng so lÖch ng­ìng IS2: 2.0 A HÖ sè h·m K2: 150% Thêi gian trÔ tÝn hiÖu c¾t liªn ®éng(PIT): 0 ms Sai sè thêi gian trÔ kªnh truyÒn: 250 micro sec Thêi gia trÔ h­ háng ®­êng truyÒn: 0.1 sec ChÕ ®é kho¸ tù ®éng ®ãng l¹i: C¾t liªn ®éng vµ sù cè 3 pha ChÕ ®é c¾t : 1 pha. 2.3- B¶o vÖ qu¸ dßng pha (F51). - Sö dông r¬ le :MCGG62. - Th«ng sè ®Æt cña r¬ le: Dßng chØnh ®Þnh : Is = 1.2 In Thêi gian chØnh ®Þnh : t = 1 s (ë chÕ ®é vËn hµnh b×nh th­êng b¶o vÖ ®­îc t¸ch khái vËn hµnh). 2.4- B¶o vÖ qu¸ dßng chËm ®Êt cã h­íng - Sö dông r¬ le: MCGG22 + METI11. - Th«ng sè ®Æt cña r¬ le: MCGG : Current setting : Is = 0.1 In Time setting: t = 0.1 s METI11: Internal angles setting: +45. 3 - B¶o vÖ ®­êng d©y 580 (Hµ tÜnh - Nho Quan1): 3.1- B¶o vÖ kho¶ng c¸ch hîp bé : - Sö dông r¬ le 7SA513. - Th«ng sè ®Æt cña r¬ le: 1100 POWER SYSTEM DATA 1101 Relay will internally roll CT polarity: Zero Degrees 1102 System star-point condition: Solidly earthed 1103 Primarry rated voltage: 500 kV 1104 Secondary rated voltage: 110 V 1105 Primarry rated current: 1200 A 1107 Min. current for CT-saturation: 20.00 I/In 1109 Ux voltage transformer connection: Not connected 1110 Nomimal Ph to nomimal 3V0 .sec. voltage ratio : 1.73 1111 I4 Current transformer connection: Protected line 1112 Matching factor Ie/Iph (Ie Protected line): 1 1113 Matching factor Ie/Iph (Ie Parallel line): 1 1114 I5 Current transformer connection: Not connected 1117 RG/RL- Ratio of ground to line resistance: 2.65 1118 XG/XL- Ratio of ground to line resistance: 0.57 1119 Mutual compensating factor RM/RL: 0 1120 Mutual compensating factor XM/XL: 0 1121 Line angle: 85.3 Grad 1122 Line secondary reactance Xsec: 0.74 Ohm/km 1123 Line secondary capacitance CBsec: 0.048 m F/km 1124 Line length: 307.5 km 1125 Earth current ratio parallel line comp. 85% 1130 Trip command min. duration for I > I-RES: 0.06 s 1131 Trip command min. duration for I < I-RES: 0.15 s 1135 Maximum close command duration: 0.06 s 1136 3 pole coupling after 1 pole trip: with trip comm. 1137 Trip type with 2 phase faults: Three-pole 1138 Load compensation: Yes 1140 Current threshold for open line detect. I-RES: 0.10 I/In 1141 Voltage threshold for open line detect. U-RES: 30 V 1142 CB close zone release extension: 0.05 s 1143 Checking of circuit breaker position: CB AUX and I-RES.< 1145 Prolongation time after manual closing: 0.30 s 1149 Stabilization time for external trip: 0.01 s 1300 DISTANCE PROTECTION: INDEPENDENT ZONES 1301 Zone 1: Resistance (phase-phase)R1: 15.00 Ohm 1302 Zone 1: Resistance (reach) X1: 3.21 Ohm 1303 Zone 1: Resistance (phase-earth)R1E: 20.00 Ohm 1304 Zone 1: Drection: Forwards 1305 Zone 1: Delay for single phase faults T1 1PH: 0.00 s 1306 Zone 1: Delay for multi- phase faults T1: 0.00 s 1311 Zone 2: Resistance settingR2: 15.00 Ohm 1312 Zone 2: Resistance X2: 28.26 Ohm 1313 Zone 2: Resistance (phase-earth)R2E: 20.00 Ohm 1314 Zone 2: Drection: Forwards 1315 Zone 2: Delay for single phase faults T2 1PH: 0.50 s 1316 Zone 2: Delay for multi- phase faults T2: 0.50 s 1321 Zone 3: Resistance R3 : 15.00 Ohm 1322 Zone 3: Resistance X3 : 28.56 Ohm 1323 Zone 3: Resistance (phase-earth)R3E: 20.00 Ohm 1324 Zone 3: Drection: Forwards 1325 Zone 3: Delay for all faultsT3: 1.00 s 1400 DISTANCE PROTECTION: CONTROLLED ZONES Z1B, Z1L 1401 Zone 1B: Resistance (phase-phase)R1B: 15.00 Ohm 1402 Zone 1B: Resistance (reach)X1B: 28.56 Ohm 1403 Zone 1B: Resistance (phase-earth)R1BE: 20.00 Ohm 1404 Zone 1B: Drection: Forwards 1405 Zone 1B: Delay for single phase faults: 0.00s 1406 Zone 1B: Delay for multi- phase faults: 0.00 s 1407 Coord.- Timer for blocking scheme : 0.01 s 1411 Zone 1L: Resistance (phase-phase)R1L: 15.00 Ohm 1412 Zone 1L: Resistance (reach)X1L: 28.56 Ohm 1413 Zone 1L: Resistance (phase-earth)R1LE: 20.00 Ohm 1414 Zone 1L: Drection: Forwards 1415 Zone 1L: Delay for all faults T1L: +*s 1600 DISTANCE PROTECTION: FAULT DETECTION 1602 Earth fault detection Ie>: 0.10 I/In 1602 Earth fault detection(independent of1707) Ie>>: 0.10 I/In 1621 Min. current for imped. measurement Iph>: 0.10 I/In 1622 Fault detection polygon setting X+A: 45.00 Ohm 1623 Fault detection polygon setting X-A : 45.00 Ohm 1624 Fault detection polygon setting RA1: 20.00 Ohm 1625 Fault detection polygon setting RA2: 45.00 Ohm 1626 Fault detection polygon for earthfaultRA1E : 30.00 Ohm 1627 Fault detection polygon for earthfaultRA2E : 55.00 Ohm 1628 Fault detection polygon angle PHI A: 450 1629 Fault detection polygon angle(earth) PHI AE: 450 1630 Overcurrent fault detection Iph>> : +* I/In 1700 FAULTS IN EARTHED NETWORKS 1701 Earthfault detection using Ue> : 20 V 1703 Loop selection with Ph-Ph-E fault detection: Block leading 1707 Earthfault detection with: Ue> and Ie> 2200 TELEPROTECT.: PERMISSIVE OVERREACH(P.O.T.T) 2201 Permissive overreach transfer trip is : ON 2202 Permissive overreach transfer trip feature: Z1B release 2203 Transient block. time after external flt : 0.05 s 2204 Waiting time for trans. blocking : +*s 2206 Send signal prolongation for P.O.T.T : 0.05 s 2210 Effective direct.for direct. comparison: Forwards 2211 Waiting time for trans. block. (reverse faults): 0.04 s 2212 Send signal delay for P.O.T.T : 0.00 s 2220 Echo function for weak infeeds : ON 2221 Echo delay time : 0.04 s 2222 Duration of echo impulse : 0.05 s 2223 Echo blocking time: 0.15 s 2400 SWITCH-ON-TO-FAULT PROTECTION tch-on-to-fault function is : ON ease of switch-on-to-fault function: Only man. close 2404 Current for fault recognition:Isc : 1.80 I/In 2500 WEAK INFEED PROTECTION 2501 Weak infeed function is : ON 2502 Under voltage Uph : 50 V 2505 Reception signal delay(for stabilisation): 0.01 s 2506 Reception signal extension : 0.20 s 3100 EARTH FAULT PROTECTION: DRECT/NON DIRECT 3101 Earth fault protection is: ON 3102 Earth fault overcurrent characteristic: Del.inite Time 3103 Earth fault overcurrent threshold Ie> , Iep: 0.50 I/In 3104 Minimum voltage for direct. measurment Ue> : 5.0 V 3106 Delay time for directional trip T-Direc : 1.50 s 3107 Direction: Forword 3108 Delay time for non-direct. trip T Non-Dir>: +*s 3111 Directional decision: With Ue and IY 3112 Ue inverse time characteristic Ue> INV: 0.2 V 3113 Rapid trip (w/3115) w/ rapid auto reclose(RAR): off 3114 Mode of operation with manual close (M/C): off 3115 Delay for RAR(3113) and MC w/ F/ D dir (3114): 0.00 s 3200 EARTH FAULT DIRECTIONAL COMPARISON PROTECTION. 3201 Earth fault directional comparison is: ON 3202 Delay time for transmission and trip: 0.00s 3203 Transient blocking time after external fault: 0.05 s 3204 Waiting time for trans. block. (missing recept): +*s 3206 Waiting time for trans. block. (reverse faults): 0.04 s 3210 Echo funtion for weak infeed: OFF 3211 Echo delay time: 0.04 s 3212 Duration of echo impulse: 0.05 s 3213 Echo blocking time: 0.40 s 3.2- B¶o vÖ so lÖch dßng cã h·m (F87L). - Sö dông r¬ le LFCB 102. - Th«ng sè ®Æt cña r¬ le: Dßng so lÖch ng­ìng IS1: 0.75 A HÖ sè h·m K1: 30% Dßng so lÖch ng­ìng IS2: 2.0 A HÖ sè h·m K2: 150% Thêi gian trÔ tÝn hiÖu c¾t liªn ®éng(PIT): 0 ms Sai sè thêi gian trÔ kªnh truyÒn: 250 micro sec Thêi gia trÔ h­ háng ®­êng truyÒn: 0.1 sec ChÕ ®é kho¸ tù ®éng ®ãng l¹i: C¾t liªn ®éng vµ sù cè 3 pha ChÕ ®é c¾t : 1 pha. 3.3- B¶o vÖ so lÖch dßng cã h·m (F87L). - Sö dông r¬ le MICOM 546. - Th«ng sè ®Æt cña r¬ le: Dßng so lÖch ng­ìng IS1: 0.30 A HÖ sè h·m K1: 30% Dßng so lÖch ng­ìng IS2: 2.0 A HÖ sè h·m K2: 150% Thêi gian trÔ tÝn hiÖu c¾t liªn ®éng(PIT): 0 ms Sai sè thêi gian trÔ kªnh truyÒn: 250 micro sec Thêi gia trÔ h­ háng ®­êng truyÒn: 0.1 sec ChÕ ®é kho¸ tù ®éng ®ãng l¹i: C¾t liªn ®éng vµ sù cè 3 pha ChÕ ®é c¾t : 1 pha. 3.4- B¶o vÖ qu¸ ¸p ,qu¸ dßng Io . - Sö dông r¬ le MICOM P141. - Th«ng sè ®Æt cña r¬ le: GROUP 1 EARTH FAULT 1 IN1>1 Function: DT IN1> 1Drirection: Drirection Fwd IN1> 1Current: 500.0 mA IN1>1 Time delay: 1.500 s IN1>1 T.RESET: 0.000 s IN1>2 Function: DT IN1>2 Drirection: Drirection Rev IN1> 2Current: 80.00 mA IN1> 2Time delay: 0.000 s IN1>2 T.RESET: 0.300 s IN1> Char Agle: - 450 GROUP 1 VOLT. PROTECTION. UNDERVOLTAGE: V< Measur’t Mode: Phase-Neutral V< Operate Mode: Any phase V< 1Function: Disabled V< 2 Status: Disabled OVERVOLTAGE: V> Measur’t Mode: Phase-Neutral V> Operate Mode: Any phase V> 1Function: DT V> Voltage set: 74 V V> Time delay: 1.00 s V> 2 Status: Enable V> 1 Voltage set: 111 V V> Time delay: 0.00 s 3.5- B¶o vÖ qu¸ ¸p. - Sö dông r¬ le MICOM P141. - Th«ng sè ®Æt cña r¬ le: GROUP 1 VOLT. PROTECTION. UNDERVOLTAGE: V< Measur’t Mode: Phase-Neutral V< Operate Mode: Any phase V< 1Function: Disabled V< 2 Status: Disabled OVERVOLTAGE: V> Measur’t Mode: Phase-Neutral V> Operate Mode: Any phase V> 1Function: DT V> Voltage set: 74 V V> Time delay: 1.00 s V> 2 Status: Enable V> 1 Voltage set: 111 V V> Time delay: 0.00 s 4 - B¶o vÖ ®­êng d©y 582 (Hµ tÜnh - Nho Quan1): 4.1- B¶o vÖ kho¶ng c¸ch , qu¸ ¸p, chèng ®ãng vµo ®iÓm sù cè: - Sö dông r¬ le 7SA513. - Th«ng sè ®Æt cña r¬ le: 1100 POWER SYSTEM DATA 1101 Relay will internally roll CT polarity: Zero Degrees 1102 System star-point condition: Solidly earthed 1103 Primarry rated voltage: 500 kV 1104 Secondary rated voltage: 110 V 1105 Primarry rated current: 1200 A 1107 Min. current for CT-saturation: 20.00 I/In 1109 Ux voltage transformer connection: Not connected 1110 Nomimal Ph to nomimal 3V0 .sec. voltage ratio : 1.73 1111 I4 Current transformer connection: Protected line 1112 Matching factor Ie/Iph (Ie Protected line): 1 1113 Matching factor Ie/Iph (Ie Parallel line): 1 1114 I5 Current transformer connection: Not connected 1117 RG/RL- Ratio of ground to line resistance: 2.65 1118 XG/XL- Ratio of ground to line resistance: 0.57 1119 Mutual compensating factor RM/RL: 0 1120 Mutual compensating factor XM/XL: 0 1121 Line angle: 85.3 Grad 1122 Line secondary reactance Xsec: 0.74 Ohm/km 1123 Line secondary capacitance CBsec: 0.048 m F/km 1124 Line length: 290 km 1125 Earth current ratio parallel line comp. 85% 1130 Trip command min. duration for I > I-RES: 0.00 s 1131 Trip command min. duration for I < I-RES: 0.15 s 1135 Maximum close command duration: 1.00 s 1136 3 pole coupling after 1 pole trip: with trip comm. 1137 Trip type with 2 phase faults: Three-pole 1138 Load compensation: Yes 1140 Current threshold for open line detect. I-RES: 0.10 I/In 1141 Voltage threshold for open line detect. U-RES: 30 V 1142 CB close zone release extension: 0.05 s 1143 Checking of circuit breaker position: CB AUX and I-RES.< 1145 Prolongation time after manual closing: 0.30 s 1149 Stabilization time for external trip: 0.01 s 1300 DISTANCE PROTECTION: INDEPENDENT ZONES 1301 Zone 1: Resistance (phase-phase)R1: 12.00 Ohm 1302 Zone 1: Resistance (reach) X1: 2.15 Ohm 1303 Zone 1: Resistance (phase-earth)R1E: 17.00 Ohm 1304 Zone 1: Drection: Forwards 1305 Zone 1: Delay for single phase faults T1 1PH: 0.00 s 1306 Zone 1: Delay for multi- phase faults T1: 0.00 s 1311 Zone 2: Resistance settingR2: 15.00 Ohm 1312 Zone 2: Resistance X2: 27.00 Ohm 1313 Zone 2: Resistance (phase-earth)R2E: 20.00 Ohm 1314 Zone 2: Drection: Forwards 1315 Zone 2: Delay for single phase faults T2 1PH: 0.50 s 1316 Zone 2: Delay for multi- phase faults T2: 0.50 s 1321 Zone 3: Resistance R3 : 15.00 Ohm 1322 Zone 3: Resistance X3 : 27.00 Ohm 1323 Zone 3: Resistance (phase-earth)R3E: 20.00 Ohm 1324 Zone 3: Drection: Forwards 1325 Zone 3: Delay for all faultsT3: 1.00 s 1400 DISTANCE PROTECTION: CONTROLLED ZONES Z1B, Z1L 1401 Zone 1B: Resistance (phase-phase)R1B: 15.00 Ohm 1402 Zone 1B: Resistance (reach)X1B: 27.00 Ohm 1403 Zone 1B: Resistance (phase-earth)R1BE: 20.00 Ohm 1404 Zone 1B: Drection: Forwards 1405 Zone 1B: Delay for single phase faults: 0.00s 1406 Zone 1B: Delay for multi- phase faults: 0.00 s 1407 Coord.- Timer for blocking scheme : 0.01 s 1411 Zone 1L: Resistance (phase-phase)R1L: 15.00 Ohm 1412 Zone 1L: Resistance (reach)X1L: 27.00 Ohm 1413 Zone 1L: Resistance (phase-earth)R1LE: 20.00 Ohm 1414 Zone 1L: Drection: Forwards 1415 Zone 1L: Delay for all faults T1L: +*s 1600 DISTANCE PROTECTION: FAULT DETECTION 1602 Earth fault detection Ie>: 0.10 I/In 1602 Earth fault detection(independent of1707) Ie>>: 0.10 I/In 1621 Min. current for imped. measurement Iph>: 0.10 I/In 1622 Fault detection polygon setting X+A: 45.00 Ohm 1623 Fault detection polygon setting X-A : 45.00 Ohm 1624 Fault detection polygon setting RA1: 20.00 Ohm 1625 Fault detection polygon setting RA2: 45.00 Ohm 1626 Fault detection polygon for earthfaultRA1E : 30.00 Ohm 1627 Fault detection polygon for earthfaultRA2E : 55.00 Ohm 1628 Fault detection polygon angle PHI A: 450 1629 Fault detection polygon angle(earth) PHI AE: 450 1630 Overcurrent fault detection Iph>> : +* I/In 1700 FAULTS IN EARTHED NETWORKS 1701 Earthfault detection using Ue> : 20 V 1703 Loop selection with Ph-Ph-E fault detection: Block leading 1707 Earthfault detection with: Ue> or Ie> 2200 TELEPROTECT.: PERMISSIVE OVERREACH(P.O.T.T) 2201 Permissive overreach transfer trip is : ON 2202 Permissive overreach transfer trip feature: Z1B release 2203 Transient block. time after external flt : 0.05 s 2204 Waiting time for trans. blocking : +*s 2206 Send signal prolongation for P.O.T.T : 0.05 s 2210 Effective direct.for direct. comparison: Forwards 2211 Waiting time for trans. block. (reverse faults): 0.04 s 2212 Send signal delay for P.O.T.T : 0.00 s 2220 Echo function for weak infeeds : OFF 2221 Echo delay time : 0.04 s 2222 Duration of echo impulse : 0.05 s 2223 Echo blocking time: 0.15 s SWITCH-ON-TO-FAULT PROTECTION Switch-on-to-fault function is : ON Release of switch-on-to-fault function: Only man. close 2404 Current for fault recognition:Isc : 1.80 I/In 3700 OVER VOLTAGE PROTECTION 3701 Over voltage protection stage is: ON 3703 Over voltage pick-up value U> : 1.3 U/Un 3704 Over voltage reset ratio: U> reset/ U> : 0.9 3705 Trip time delay T-U> : 1.00 s 3706 Over voltage compensation function : OFF 3708 Over voltage trip action: Local trip 3711 Highset over voltage protection stage is: ON 3712 Highset over voltage selection: Phase-Earth 3713 Highset over voltage pick-up value U>>: 1.75 U/Un 3714 Highset over voltage reset: U>> reset/ U>>: 0.9 3715 Highset over voltage fault detection action: OR COMBINET 3716 Delay time with closed circuit breaker: 0.06 s 3717 Delay time with open circuit breaker: 0.02 s 3718 Time for block. of highset over voltage: 0.06 s 3720 Highset over voltage trip action: Local trip 3721 Duration of sed signal: 0.25 s 4.2- B¶o vÖ so lÖch däc (F87L). - Sö dông r¬ le: 7SD522 - Th«ng sè ®Æt cña r¬ le: 87-1 Pickup : 0.54 A 87-1 Value under switch on condition: 0.86 A 87-1 Trip time delay: 0.00 s Delay 1ph-fault (comp/ isol. star-point): 0.00 s 87-2 Pickup: 1.200 A 4.3- B¶o vÖ so lÖch dßng cã h·m (F87L). - Sö dông r¬ le MICOM 546. - Th«ng sè ®Æt cña r¬ le: Dßng so lÖch ng­ìng IS1: 0.5A HÖ sè h·m K1: 30% Dßng so lÖch ng­ìng IS2: 2.0 A HÖ sè h·m K2: 150% 4.4- B¶o vÖ qu¸ ¸p ,qu¸ dßng Io : (Gåm 2 bé: sö dông cïng lo¹i r¬ le vµ th«ng sè ®Æt nh­ nhau). - Sö dông r¬ le MICOM P141. - Th«ng sè ®Æt cña r¬ le: GROUP 1 EARTH FAULT 1 IN1>1 Function: DT IN1> 1Drirection: Drirection Fwd IN1> 1Current: 500.0 mA IN1>1 Time delay: 1.500 s IN1>1 t.RESET: 0.000 s IN1>2 Function: DT IN1>2 Drirection: Drirection Rev IN1> 2Current: 80.00 mA IN1> 2Time delay: 0.000 s IN1>2 t.RESET: 0.300 s IN1> Char Agle: - 450 GROUP 1 VOLT. PROTECTION. UNDERVOLTAGE: V< Measur’t Mode: Phase-Neutral V< Operate Mode: Any phase V< 1Function: Disabled V< 2 Status: Disabled OVERVOLTAGE: V> Measur’t Mode: Phase-Neutral V> Operate Mode: Any phase V> 1Function: DT V> Voltage set: 74 V V> Time delay: 1.00 s V> 2 Status: Enable V> 1 Voltage set: 111 V V> Time delay: 0.00 s 5 - B¶o vÖ ®­êng d©y 272. 5.1- B¶o vÖ kho¶ng c¸ch vµ qóa dßng cã h­íng(F21). - Sö dông r¬ le EPAC 3000 - Th«ng sè ®Æt cña r¬ le: LINE CHARACTERISTICS: Nominal frequency: 50 Hz Nominal voltage: 110V Nominal current: 1A Line lenght: 63.04 km Voltage ratio (Ku): 2045 Current ratio (Ki): 1200 R1 positive sequence Resistance: 3.81Ohm X1 positive sequence Resistance: 15.86 Ohm Z1 positive sequence Resistance: 16.31 Ohm Argument of Z1: 76 Degree R01 positive sequence Resistance: 9.36 Ohm X01 positive sequence Resistance: 55.51Ohm Z01 positive sequence Resistance: 56.294 Ohm Argument of Z01: 80 Degree R02 positive sequence Resistance: 9.36 Ohm X02 positive sequence Resistance: 55.51 Ohm Z02 positive sequence Resistance: 56.294 Ohm Argument of Z1: 80 Degree K01r Real of K01: 0.81 K01x Imaginary of K01: 0.07 K02r Real of K02: 0.81 K02x Imaginary of K02: 0.07 ZONE SETTING: Zone 1 impedance: 13.05 Ohm LV Zone 2 impedance: 19.68 Ohm LV Zone 3 impedance: 49 Ohm LV Zone 4 impedance: 49 Ohm LV Zone 5 impedance: 13 Ohm LV Zone 3 Direction: Forwards Zone 1 Time delay (T1): 0 ms Zone 2 Time delay (T2): 500 ms Zone 3 Time delay (T3): 4000 ms Zone 4 Time delay (T4): 5000 ms Zone 5 Time delay (T5): 5000 ms Phase - earth resistance zone 1: 21 Ohm LV Phase - phase resistance zone 1: 21 Ohm LV Limit resistance for zone 2: 23 Ohm LV Limit resistance for zone 3: 30 Ohm LV Starting limit resistance: 65 Ohm LV FUSE FAILURE SETTING: I0 and I2 threshold detection: 0.05 In Fuse failure alarm time delay: 1 s Ifus> enabled Ifus> threshold: 1 In Tfus> time-delay: 1000 ms Ifus> enabled Ifus> threshold: 2.5 In Tfus> time-delay: 300 ms - B¶o vÖ kho¶ng c¸ch vµ qóa dßng cã h­íng(F21). - Sö dông r¬ le 7SA511. - Th«ng sè ®Æt cña r¬ le: POWER SYSTEM DATA Current transformer: Towards line System star-point condition: Solidly earthed Primarry rated voltage: 225 kV Secondary rated voltage: 110 V Primarry rated current: 1200 A voltage transformer connection: Not connected Matching factor Uph/Udelta (sec. earth voltage): 1.73 1112 Matching factor Ie/Iph for earth current: 1.000 1117 Residual compensating factor: RE/RL 0.49 1118 Residual compensating factor: XE/XL 0.83 1122 Secondaryreactance per unit line length Xsec: 0.252 Ohm/km 1124 Line length: 63.04 km 1130 Trip command min.duration for I > I-RES: 0.05 s 1131 Trip command min.duration for I < I-RES: 0.15 s 1135 Maximum close command duration: 1.00 s 1136 3 pole coupling: with fault detection 1137 Trip type with 2 phase faults: Three-pole 1145 Prolongation time after manual closing: 0.30 s 1149 Stabilization time for external trip: 0.01 s 1300 DISTANCE PROTECTION: INDEPENDENT ZONES 1301 Zone 1: Resistance (phase-phase)R1: 3.05 Ohm 1302 Zone 1: Resistance (reach) X1: 12.69 Ohm 1303 Zone 1: Resistance (phase-earth) R1E: 21.00 Ohm 1304 Zone 1: Drection: Forwards 1305 Zone 1: Delay for single phase faults T1 1PH: 0.00 s 1306 Zone 1: Delay for multi- phase faults T1: 0.00 s 1311 Zone 2: Resistance (phase-phase) R2: 4.58 Ohm 1312 Zone 2: Resistance (reach) X2: 19.04 Ohm 1313 Zone 2: Resistance (phase-earth) R2E: 23.00 Ohm 1314 Zone 2: Drection: Forwards 1315 Zone 2: Delay for single phase faults T2 1PH : 0.50 s 1316 Zone 2: Delay for multi- phase faults T2: 0.50 s 1317 Single pole trip for faults in Z2: no 1321 Zone 3: Resistance (phase-phase) R3: 11.39 Ohm 1322 Zone 3: Resistance (reach) X3: 47.65 Ohm 1323 Zone 3: Resistance (phase-earth) R3E: 30.00 Ohm 1324 Zone 3: Drection: Forwards 1325 Zone 3: Delay for all faults T3: 4.00 s 1400 DISTANCE PROTECTION: CONTROLLED ZONES 1401 Zone 1B: Resistance (phase-phase) R1B: 4.58 Ohm 1402 Zone 1B: Resistance (reach) X1B: 19.04 Ohm 1403 Zone 1B: Resistance (phase-earth) R1BE: 23.00 Ohm 1404 Zone 1B: Drection: Forwards 1405 Zone 1B: Delay for single phase faults T1B 1PH : 0.00s 1406 Zone 1B: Delay for multi- phase faults T1B: 0.00 s 1411 Zone 1L: Resistance (phase-phase) R1L: 4.58 Ohm 1412 Zone 1L: Resistance (reach) X1L: 19.04 Ohm 1413 Zone 1L: Resistance (phase-earth) R1LE: 23.00 Ohm 1414 Zone 1L: Drection: Forwards 1415 Zone 1L: Delay for all faults: T1L 0.00 s DISTANCE PROTECTION: FAULT DETECTION Overcurrent detection Iph>>: 0.75 I/In Earth fault detection Ie>: 0.10 I/In 1621 Mimum current for fault detection Iph>: 0.20 I/In 1622 Fault detection forward reach X+A: 50.00 Ohm 1623 Fault detection reverse reach X-A: 30.00 Ohm 1624 Fault det. resistance (ph-ph, phi<PHI A) RA1: 35.00 Ohm 1625 Fault det. resistance (ph-ph, phi>PHI A) RA2: 35.00 Ohm 1626 Fault det. resistance (ph-e, phi<PHI AE) RA1E: 40.00 Ohm 1627 Fault det. resistance (ph-e, phi>PHI AE) RA2E: 40.00 Ohm 1628 Fault det. ph-ph angle betw. RA1/RA2 PHI A: 450 1629 Fault det. ph- e angle betw. RA1E/RA2E PHI AE: 450 2600 EMERGENCY DEFINITE TIME OVERCURRENT PROTECTION 2601 Emergency overcurrent definite time protection on 2602 Highset phase overcurrent threshold (DT) I>>: 2.50 I/In 2603 Delay time for I>> TI>>: 0.30 s 2612 Phase overcurrent threshold(DT) I>: 1.0 I/In 2613 Delay time for I> TI>: 1.00 s 2621 Phase overcurrent stage effect. : Manual close I>> undelayed 2623 Phase overcurrent stage effect. : Auto close I>> always 2642 Earth overcurrent threshold (DT)IE>: 0.40 I/In 2643 Delay time for IE> TIE>: 1.00 s 2651 Earth overcurrent stage effect: Manual close Ie> undelayed. 6 - B¶o vÖ ®­êng d©y 274. 6.1 - B¶o vÖ kho¶ng c¸ch vµ qóa dßng cã h­íng. - Sö dông r¬ le: EPAC 3000. - Th«ng sè ®Æt cña r¬ le: LINE CHARACTERISTICS: Nominal frequency: 50 Hz Nominal voltage: 110 V Nominal current: 1 A Line lenght: 150 km Voltage ratio (Ku): 2045 Current ratio (Ki): 1200 R1 positive sequence Resistance: 9.068 Ohm X1 positive sequence Resistance: 37.77 Ohm Z1 positive sequence Resistance: 38.843 Ohm Argument of Z1: 76 Degree R01 positive sequence Resistance: 22.274 Ohm X01 positive sequence Resistance: 132.15 Ohm Z01 positive sequence Resistance: 134.014 Ohm Argument of Z01: 80 Degree R02 positive sequence Resistance: 22.274 Ohm X02 positive sequence Resistance: 132.15 Ohm Z02 positive sequence Resistance: 134.014 Ohm Argument of Z1: 80 Degree K01r Real of K01: 0.81 K01x Imaginary of K01: 0.07 K02r Real of K02: 0.81 K02x Imaginary of K02: 0.07 ZONE SETTING: Zone 1 impedance: 31.08 Ohm LV Zone 2 impedance: 46.62 Ohm LV Zone 3 impedance: 77.7 Ohm LV Zone 4 impedance: 77.7 Ohm LV Zone 5 impedance: 13 Ohm LV Zone 3 Direction: Forwards Zone 1 Time delay (T1): 0 ms Zone 2 Time delay (T2): 500 ms Zone 3 Time delay (T3): 4000 ms Zone 4 Time delay (T4): 5000 ms Zone 5 Time delay (T5): 5000 ms Phase - earth resistance zone 1: 26 Ohm LV Phase - phase resistance zone 1: 26 Ohm LV Limit resistance for zone 2: 29 Ohm LV Limit resistance for zone 3: 36 Ohm LV Starting limit resistance: 65 Ohm LV FUSE FAILURE SETTING: I0 and I2 threshold detection: 0.05 In Fuse failure alarm time delay: 1 s Ifus> enabled Ifus> threshold: 1 In Tfus> time-delay: 1000 ms fus> enabled Ifus> threshold: 2 In Tfus> time-delay: 300 ms - B¶o vÖ kho¶ng c¸ch vµ qóa dßng cã h­íng. - Sö dông r¬ le 7SA511. - Th«ng sè ®Æt cña r¬ le: 1100 POWER SYSTEM DATA 1101 Current transformer: Towards line 1102 System star-point condition: Solidly earthed 1103 Primarry rated voltage: 225 kV 1104 Secondary rated voltage: 110 V 1105 Primarry rated current: 1200 A 1109 Voltage transformer connection: Not connected Ching factor Uph/Udelta (sec. earth voltage): 1.73 1112 Matching factor Ie/Iph for earth current: 1.000 1117 Residual compensating factor RE/RL: 0.49 1118 Residual compensating factor XE/XL: 0.83 1122 Secondaryreactance per unit line length Xsec: 0.252 Ohm/km 1124 Line length: 150 km 1130 Trip command min.duration for I > I-RES: 0.05 s 1131 Trip command min.duration for I < I-RES: 0.15 s 1135 Maximum close command duration: 1.00 s 1136 3 pole coupling: with fault detection 1137 Trip type with 2 phase faults: Three-pole 1145 Prolongation time after manual closing: 0.30 s 1149 Stabilization time for external trip: 0.01 s 1300 DISTANCE PROTECTION: INDEPENDENT ZONES 1301 Zone 1: Resistance (phase-phase) R1: 7.25 Ohm 1302 Zone 1: Resistance (reach) X1: 30.22 Ohm 1303 Zone 1: Resistance (phase-earth) R1E: 26.00 Ohm 1304 Zone 1: Drection: Forwards 1305 Zone 1: Delay for single phase faults T1 1PH: 0.00 s 1306 Zone 1: Delay for multi- phase faults T1: 0.00 s 1311 Zone 2: Resistance (phase-phase) R2: 10.88 Ohm 1312 Zone 2: Resistance (reach) X2: 45.33 Ohm 1313 Zone 2: Resistance (phase-earth) R2E: 29.00 Ohm 1314 Zone 2: Drection: Forwards 1315 Zone 2: Delay for single phase faults T2 1PH: 0.50 s 1316 Zone 2: Delay for multi- phase faults T2: 0.50 s 1317 Single pole trip for faults in Z2: no 1321 Zone 3: Resistance (phase-phase R3): 18.14 Ohm 1322 Zone 3: Resistance (reach) X3: 75.5 Ohm 1323 Zone 3: Resistance (phase-earth) R3E: 36.00 Ohm 1324 Zone 3: Drection: Forwards 1325 Zone 3: Delay for all faults T3: 4.00 s 1400 DISTANCE PROTECTION: CONTROLLED ZONES 1401 Zone 1B: Resistance (phase-phase) R1B: 10.88 Ohm 1402 Zone 1B: Resistance (reach) X1B: 45.33 Ohm 1403 Zone 1B: Resistance (phase-earth) R1BE: 29.00 Ohm 1404 Zone 1B: Drection: Forwards 1405 Zone 1B: Delay for single phase faults T1B 1PH: 0.00s 1406 Zone 1B: Delay for multi- phase faults T1B: 0.00 s 1411 Zone 1L: Resistance (phase-phase) R1L: 10.88 Ohm 1412 Zone 1L: Resistance (reach) X1L: 45.33 Ohm 1413 Zone 1L: Resistance (phase-earth) R1LE: 29.00 Ohm 1414 Zone 1L: Drection: Forwards 1415 Zone 1L: Delay for all faults T1L: 0.00 s 1600 DISTANCE PROTECTION: FAULT DETECTION 1601 Overcurrent detection Iph>>: 0.75 I/In 1602 Earth fault detection Ie>: 0.20 I/In 1621 Min. current for fault detection Iph>: 0.20 I/In 1622 Fault detection forward reach X+A: 80.00 Ohm 1623 Fault detection reverse reach X-A: 40.00 Ohm 1624 Fault det. resistance (ph-ph, phi<PHI A) RA1: 40.00 Ohm 1625 Fault det. resistance (ph-ph, phi>PHI A) RA2: 40.00 Ohm 1626 Fault det. resistance (ph-e, phi<PHI AE) RA1E: 45.00 Ohm 1627 Fault det. resistance (ph-e, phi>PHI AE) RA2E: 45.00 Ohm 1628 Fault det. ph-ph angle betw. RA1/RA2 PHI A: 450 1629 Fault det. ph- e angle betw. RA1E/RA2E PHI AE: 450 2600 EMERGENCY DEFINITE TIME OVERCURRENT PROTECTION 2601 Emergency overcurrent definite time protection on 2602 Highset phase overcurrent threshold (DT) I>>: 2.00 I/In 2603 Delay time for I>> TI>>: 0.30 s 2612 Phase overcurrent threshold(DT) I>: 1.0 I/In 2613 Delay time for I> TI>: 1.00 s 2621 Phase overcurrent stage effect. : Manual close I>> undelayed 2623 Phase overcurrent stage effect. : Auto close I>> always 2642 Earth overcurrent threshold (DT) IE>: 0.40 I/In 2643 Delay time for IE> TIE>: 1.00 s 2651 Earth overcurrent stage effect: Manual close Ie> undelayed. 7 - B¶o vÖ ®­êng d©y 276. 7.1 - B¶o vÖ kho¶ng c¸ch (F21). - Sö dông r¬ le 7SD52. - Th«ng ®Æt cña r¬ le: 1103 Full scale Voltage : 225 kV 1104 Full scale Current : 1200 A 1105 Line Angle: 770 1121 Distance Angle : 900 1107 P,Q Sign: Not rever sent 1110 X’ : 0.252 Ohm/km 1111 Line length: 65.6 km 1116 RE/RL (Z1): 0.49 1117 XE/XL (Z1): 0.83 1118 RE/RL (Z1 ... Z5) 0.49 1119 XE/XL (Z1 ... Z5): 0.83 1201 FCT Distance : ON 1202 Minimum Iph> : 0.50 A 1203 3Io > Threshold: 0.10 A 1204 3Uo > : 5.00 V 1208 SER - COMP . : NO 1210 Star Time : ON Des. Pickup 1211 Distance Angle: 900 1232 SOTF zone : Inactive 1241 R load (PH -E): 75 Ohm 1242 j load (PH -E): 450 1243 R load (PH -PH): 63.00 Ohm 1244 j load (PH -PH): 450 1301 Op. mode Z1 : Forward 1302 R (Z1) PH - PH : 5.00 Ohm 1303 X (Z1) 13.2 Ohm 1304 RE (Z1) PH - E : 16.00 Ohm 1305 T1 - 1Phase : 0 sec 1306 T1 - Multi-Phase : 0 sec 1307 Zone Reduction : 00 1311 Op. mode Z2 : Forward 1312 R (Z2) PH - PH : 10.00 Ohm 1313 X (Z2) 20.60 Ohm 1314 RE (Z2) PH - E : 25.00 Ohm 1315 T2 - 1Phase : 0.50 sec 1316 T2 - Multi-Phase : 0.50 sec 1321 Op. mode Z3 : Forward 1322 R (Z3) PH - PH : 40.00 Ohm 1323 X (Z3) 62.00 Ohm 1324 RE (Z3) PH - E : 65.00 Ohm 1325 T3 Delay : 3.50 sec 1331 Op. mode Z4 : Inactive 1332 R (Z4) 35.20 Ohm 1334 RE (4) PH - PH : 35.20 Ohm 1333 X (ZZ4) PH - E : 35.20 Ohm 1335 T4 Delay: 2.00 sec 1341 Op. mode Z5 : Inactive 1342 R (Z5) PH - PH : 35.20 Ohm 1343 X (Z5) 35.20 Ohm 1344 RE (Z5) PH - E : 35.20 Ohm 1345 T5 Delay: 3.00 sec 7.2 - B¶o vÖ so lÖch(F87). - Sö dông r¬ le: 7SD52 - Th«ng sè ®Æt cña r¬ le: I - DIFF > 0.2 A I - DIFF > SWITCH ON 0.2 A I - DIFF >> 1.5 A 7.3 - B¶o vÖ qu¸ dßng vµ qu¸ dßng ch¹m ®Êt cã h­íng(F67). ( Gåm 2 bé gièng nhau vµ cã th«ng sè ®Æt gièng nhau). - Sö dông r¬ le: 7SD52 - Th«ng sè ®Æt cña r¬ le: 1300 EARTH O/C 1301 Earth O/C : ON 1302 Ie >> ∞ A 1303 T Ie >> ∞ sec 1302 Ie > 0.10 A 1303 T Ie > 4 sec 1500 DIR. PH O/C 1501 Dir. Phase O/C ON 1502 I >> 2.6 A 1503 T I >> 0.3 sec 1504 I > 1.00 A 1505 T I > 3.5 sec 1600 DIR. EARTH O/C 1601 Dir. Earth O/C : ON 1602 Ie >> 1.10 A 1603 T Ie >> 0.30 sec 1604 Ie > 0.50 A 1605 T Ie > 1.50 sec 8 - B¶o vÖ ®­êng d©y 172. 8.1 - B¶o vÖ kho¶ng c¸ch vµ qóa dßng cã h­íng(F21+F67). - Sö dông r¬ le EPAC 3000. - Th«ng ®Æt cña r¬ le: LINE CHARACTERISTICS: Nominal frequency: 50 Hz Nominal voltage: 110 V Nominal current: 1 A Line lenght: 31 km Voltage ratio (Ku): 1045 Current ratio (Ki): 800 R1 positive sequence Resistance: 4.8 Ohm X1 positive sequence Resistance: 10 Ohm Z1 positive sequence Resistance: 11 Ohm Argument of Z1: 65 Degree R01 positive sequence Resistance: 8.33 Ohm X01 positive sequence Resistance: 30 Ohm Z01 positive sequence Resistance: 31.03 Ohm Argument of Z01: 75 Degree R02 positive sequence Resistance: 8.33 Ohm X02 positive sequence Resistance: 30 Ohm Z02 positive sequence Resistance: 31.03 Ohm Argument of Z1: 75 Degree K01r Real of K01: 0.61 K01x Imaginary of K01: 0.12 K02r Real of K02: 0.61 K02x Imaginary of K02: 0.12 ZONE SETTING: Zone 1 impedance: 8.8 Ohm LV Zone 2 impedance: 14 Ohm LV Zone 3 impedance: 44.2 Ohm LV Zone 4 impedance: 44.2 Ohm LV Zone 5 impedance: 5 Ohm LV Zone 3 Direction: Forwards Zone 1 Time delay (T1): 0 ms Zone 2 Time delay (T2): 500 ms Zone 3 Time delay (T3): 4000 ms Zone 4 Time delay (T4): 5000 ms Zone 5 Time delay (T5): 5000 ms Phase - earth resistance zone 1: 10 Ohm LV Phase - phase resistance zone 1: 10 Ohm LV Limit resistance for zone 2: 20 Ohm LV Limit resistance for zone 3: 40 Ohm LV Starting limit resistance: 60 Ohm LV FUSE FAILURE SETTING: I0 and I2 threshold detection: 0.05 In Fuse failure alarm time delay: 1 s Ifus> enabled Ifus> threshold: 1.6 In Tfus> time-delay: 1000 ms Ifus> enabled Ifus> threshold: 4 In Tfus> time-delay: 300 ms - B¶o vÖ qóa dßng vµ qu¸ dßng ch¹m ®Êt cã h­íng(F67). - Sö dông r¬ le KCEG 142. - Th«ng sè ®Æt cña r¬ le: I>>> = 3.4 A Thêi gian c¾t: 0 s I>> = 1.5 A Thêi gian c¾t: 1.0 s I> = 1.0 A Thêi gian c¾t: 4.0 s Ie>>> = 2.6 A Thêi gian c¾t: 0 s Ie>> = 1.0 A Thêi gian c¾t: 0.5 s Ie> = 0.1 A Thêi gian c¾t: 3.5 s (Qu¸ dßng ch¹m ®Êt cÊp Ie> kh«ng ®Æt h­íng). 9 - B¶o vÖ ®­êng d©y 174. 9.1-B¶o vÖ kho¶ng c¸ch vµ qóa dßng cã h­íng(F21+F67). - Sö dông r¬ le EPAC 3000. - Th«ng ®Æt cña r¬ le: LINE CHARACTERISTICS: Nominal frequency: 50 Hz Nominal voltage: 110 V Nominal current: 1 A Line lenght: 12.3 km Voltage ratio (Ku): 1045 Current ratio (Ki): 800 R1 positive sequence Resistance: 1.525 Ohm X1 positive sequence Resistance: 3.887 Ohm Z1 positive sequence Resistance: 4.175 Ohm Argument of Z1: 69 Degree R01 positive sequence Resistance: 2.937 Ohm X01 positive sequence Resistance: 11.662 Ohm Z01 positive sequence Resistance: 12.026 Ohm Argument of Z01: 76 Degree R02 positive sequence Resistance: 2.937Ohm X02 positive sequence Resistance: 11.662 Ohm Z02 positive sequence Resistance: 12.026 Ohm Argument of Z1: 76 Degree K01r Real of K01: 0.61 K01x Imaginary of K01: 0.12 K02r Real of K02: 0.61 K02x Imaginary of K02: 0.12 ZONE SETTING: Zone 1 impedance: 3.34 Ohm LV Zone 2 impedance: 5.02 Ohm LV Zone 3 impedance: 47.7 Ohm LV Zone 4 impedance: 47.7 Ohm LV Zone 5 impedance: 12 Ohm LV Zone 3 Direction: Forwards Zone 1 Time delay (T1): 0 ms Zone 2 Time delay (T2): 500 ms Zone 3 Time delay (T3): 3500 ms Zone 4 Time delay (T4): 5000 ms Zone 5 Time delay (T5): 5000 ms Phase - earth resistance zone 1: 27 Ohm LV Phase - phase resistance zone 1: 27 Ohm LV Limit resistance for zone 2: 28 Ohm LV Limit resistance for zone 3: 40 Ohm LV Starting limit resistance: 60 Ohm LV FUSE FAILURE SETTING: I0 and I2 threshold detection: 0.05 In Fuse failure alarm time delay: 1 s Ifus> enabled Ifus> threshold: 1.6 In Tfus> time-delay: 1000 ms Ifus> enabled Ifus> threshold: 4 In Tfus> time-delay: 300 ms - B¶o vÖ qóa dßng vµ qu¸ dßng ch¹m ®Êt cã h­íng. - Sö dông r¬ le KCEG 142. - Th«ng sè ®Æt cña r¬ le: I>>> = 1.65 A Thêi gian c¾t: 0 s I>> = 1.35 A Thêi gian c¾t: 1.0 s I> = 1.0 A Thêi gian c¾t: 3.5 s Ie>>> = 1.8 A Thêi gian c¾t: 0 s Ie>> = 1.0 A Thêi gian c¾t: 0.5 s Ie> = 0.1 A Thêi gian c¾t: 3.5 s (Qu¸ dßng ch¹m ®Êt cÊp Ie> kh«ng ®Æt h­íng). 10 - B¶o vÖ ®­êng d©y 176. 10.1-B¶o vÖ kho¶ng c¸ch vµ qóa dßng cã h­íng(F21+F67). - Sö dông r¬ le EPAC 3000. - Th«ng ®Æt cña r¬ le: LINE CHARACTERISTICS: Nominal frequency: 50 Hz Nominal voltage: 110 V Nominal current: 1 A Line lenght: 56.2 km Voltage ratio (Ku): 1045 Current ratio (Ki): 800 R1 positive sequence Resistance: 6.967 Ohm X1 positive sequence Resistance: 17.76 Ohm Z1 positive sequence Resistance: 19.078 Ohm Argument of Z1: 69 Degree R01 positive sequence Resistance: 13.4 Ohm X01 positive sequence Resistance: 53.283 Ohm Z01 positive sequence Resistance: 54.947 Ohm Argument of Z01: 76 Degree R02 positive sequence Resistance: 13.42 Ohm X02 positive sequence Resistance: 53.283 Ohm Z02 positive sequence Resistance: 54.947 Ohm Argument of Z1: 76 Degree K01r Real of K01: 0.61 K01x Imaginary of K01: 0.12 K02r Real of K02: 0.61 K02x Imaginary of K02: 0.12 ZONE SETTING: Zone 1 impedance: 15.26 Ohm LV Zone 2 impedance: 22.89 Ohm LV Zone 3 impedance: 53 Ohm LV Zone 4 impedance: 53 Ohm LV Zone 5 impedance: 12 Ohm LV Zone 3 Direction: Forwards Zone 1 Time delay (T1): 0 ms Zone 2 Time delay (T2): 500 ms Zone 3 Time delay (T3): 3500 ms Zone 4 Time delay (T4): 5000 ms Zone 5 Time delay (T5): 5000 ms Phase - earth resistance zone 1: 32 Ohm LV Phase - phase resistance zone 1: 32 Ohm LV Limit resistance for zone 2: 35 Ohm LV Limit resistance for zone 3: 45 Ohm LV Starting limit resistance: 60 Ohm LV FUSE FAILURE SETTING: I0 and I2 threshold detection: 0.05 In Fuse failure alarm time delay: 1 s Ifus> enabled Ifus> threshold: 1.6 In Tfus> time-delay: 1000 ms Ifus> enabled Ifus> threshold: 4 In Tfus> time-delay: 300 ms - B¶o vÖ qóa dßng vµ qu¸ dßng ch¹m ®Êt cã h­íng(F67). - Sö dông r¬ le KCEG 142. - Th«ng sè ®Æt cña r¬ le: I>>> = 2.1 A Thêi gian c¾t: 0 s I>> = 1.4 A Thêi gian c¾t: 1.0 s I> = 1.0 A Thêi gian c¾t: 3.5 s Ie>>> = 2.0 A Thêi gian c¾t: 0 s Ie>> = 0.55 A Thêi gian c¾t: 0.5 s Ie> = 0.1 A Thêi gian c¾t: 3.5 s (Qu¸ dßng ch¹m ®Êt cÊp Ie> kh«ng ®Æt h­íng). 11-B¶o vÖ m¸y biÕn ¸p AT2. 11.1-B¶o vÖ so lÖch cã h·m : F87T2 - Thuéc m¹ch BV2- M¸y ng¾t sè:572 , 573 , 232 , 342. - Sö dông r¬ le SEL387( Nhµ chÕ t¹o: SEL). - Th«ng sè ®Æt cña r¬ le: + Tû sè biÕn dßng : CTR1 = 600 CTR3 = 1200 CTR2 = 600 CTR4 = 1600 + C«ng suÊt tèi ®a cña MBA : MVA = 450. + Bï tæ ®Êu d©y biÕn dßng hoÆc cuén d©y MBA: W1CTC =12 W3CTC = 12 W2CTC =12 W4CTC = 12 + §iÖn ¸p pha- pha: VWDG1 = 500 VWDG3 = 225 VWDG1 = 500 VWDG4 = 35 + ChØnh ®Þnh dßng so lÖch cã h·m: O87P = 0.2 . + HÖ sè h·m phÇn tr¨m: SPL1 = 20 SPL2 = 80. + Giíi h¹n dßng h·m cña hÖ sè h·m thø nhÊt : IRS = 1. + ChØnh ®Þnh dßng so lÖch kh«ng h·m: U87P = 10. + Møc h·m hµi bËc 2 : PCT2 = 15. + Møc h·m hµi bËc 5 : PCT5 = 40. + Møc c¶nh b¸o hµi bËc 5: TH5P = 0.5 + Thêi gian trÔ c¶nh b¸o hµi bËc 5: TH5D = 250. 11.2- B¶o vÖ qu¸ dßng: - B¶o vÖ t¸c ®éng : C¾t MC232. - Sö dông r¬ le MicomP141( Nhµ chÕ t¹o: ALSTOM). - Th«ng sè ®Æt cña r¬ le: + I >1 Current set : 1.5 xIn. + I >1 Time Delay : 1.5s. + IN2 >1Direction : Direction Fwd. + IN2 >1 Current set : 0.3 xIn. + IN2 >1 Time Delay : 1.5s. 11.3- B¶o vÖ qu¸ dßng: F51A (B¶o vÖ phÝa 35 m¸y biÕn ¸p AT2). - Thuéc m¹ch BV2 - M¸y ng¾t sè:572,573,232,342. - Sö dông r¬ le MicomP122 ( Nhµ chÕ t¹o: ALSTOM). - HiÖn t¹i bÞ t¸ch ra do viÖc sö dông tÝn hiÖudßng trªn nh¸nh tam gi¸c phÝa 35kV cña MBA kh«ng ®¸p øng yªu cÇu chän läc cho b¶o vÖ. 11.4- B¶o vÖ qu¸ ®iÖn ¸p thø tù kh«ng: B¶o vÖ phÝa 35 m¸y biÕn ¸p AT2. - Thuéc m¹ch BV2 : T¸c ®éng cña r¬ le chØ ®­a tÝn hiÖu c¶nh b¸o - Sö dông r¬ le KVFG122 ( Nhµ chÕ t¹o ALSTOM). - Th«ng sè ®Æt cña r¬ le: + Ng­ìng ®iÖn ¸p d­ : 11V. + §Æc tÝnh thêi gian : Thêi gian ®éc lËp . +Thêi gian chØnh ®Þnh: 1s. 11.5- chèng ch¹m ®Êt h¹n chÕ: - Thuéc m¹ch BV2 - M¸y ng¾t sè:572,573,232,342. - Sö dông r¬ le MCAG14 ( Nhµ chÕ t¹o: ALSTOM). - Th«ng sè ®Æt cña r¬ le: + Dßng chØnh ®Þnh Is : 0.075 A. + §iÖn trë æn ®Þnh : 620 ohms. 11.6-B¶o vÖ so lÖch MBA cã h·m : F87T1 - Thuéc m¹ch BV1- M¸y ng¾t sè:572 , 573 , 232 , 342. - Sö dông r¬ le KBCH140( Nhµ chÕ t¹o: ALSTOM). - Th«ng sè ®Æt cña r¬ le: * CÊu h×nh m¸y biÕn ¸p: + CÊu h×nh MBA : HV(x2) + LV1 + LV2 + Tû sè biÕn dßng phÝa phÝa cao ¸p : 1200/1 + Tû sè biÕn dßng phÝa phÝa trung ¸p : 1200/1 + Tû sè biÕn dßng phÝa phÝa h¹ ¸p : 100/1 + HiÖu chØnh tû sè biÕn dßng phÝa cao ¸p : Kp = 2. + Bï gãc pha phÝa cao ¸p : Yd11. + HiÖu chØnh tû sè biÕn dßng phÝa trung ¸p : Ks = 0.9 + Bï gãc pha phÝa trung ¸p : Yd11 + HiÖu chØnh tû sè biÕn dßng phÝa h¹ ¸p : Kt = 0.05 + Bï gãc pha phÝa h¹ ¸p : Ydy0. * PhÇn tö b¶o vÖ so lÖch: + ChØnh ®Þnh dßng so lÖch møc thÊp ( I > ) : 0.2 x In + ChØnh ®Þnh dßng so lÖch møc cao ( I >> ) : 9.0 x In *- PhÇn tö b¶o vÖ ch¹m ®Êt h¹n chÕ: + ChØnh ®Þnh b¶o vÖ ch¹m ®Êt h¹n chÕ phÝa cao ¸p ( I > HL ) : 0.12 x In + ChØnh ®Þnh b¶o vÖ ch¹m ®Êt h¹n chÕ phÝa trung ¸p ( I > HL ): 0.12 x In + §iÖn trë æn ®Þnh : 650 ohms. * PhÇn tö b¶o vÖ qu¸ tõ th«ng: + ChØnh ®Þnh møc hµi bËc 5 : 40% + Thêi gian trÔ cho møc hµi bËc 5 : 10s + §Æc tÝnh t¸c ®éng c¾t V/f : Thêi gian ®éc lËp + Møc chØnh ®Þnh c¾t V/f : 3 V/Hz + Thêi gian trÔ c¾t V/f : 5s + ChØnh ®Þnh c¶nh b¸o V/f : 2.5 V/ Hz + Thêi gian trÔ c¶nh b¸o V/f : 5s 11.7-B¶o vÖ qu¸ dßng cã h­íng: - Thuéc m¹ch BV1- M¸y ng¾t sè:572 , 573 , 232 , 342. - Sö dông r¬ le KCEG142( Nhµ chÕ t¹o: ALSTOM). - Th«ng sè ®Æt cña r¬ le: * B¶o vÖ qu¸ dßng pha cã h­íng: + §Æc tÝnh thêi gian t¸c ®éng cho b¶o vÖ cÊp 1 : Thêi gian ®éc lËp. + Dßng chØnh ®Þnh b¶o vÖ cÊp 1: 1.0 A + Thêi gian chØnh ®Þnh b¶o vÖ cÊp 1 : 3.0s + Gãc ®Æc tÝnh cÊp 1 : +30 degrees + Dßng chØnh ®Þnh b¶o vÖ cÊp 2: 4.0 A + Thêi gian chØnh ®Þnh b¶o vÖ cÊp 2 : 0.3s + Gãc ®Æc tÝnh cÊp 2 : +30 degrees * B¶o vÖ qu¸ dßng trung tÝnh cã h­íng: + §Æc tÝnh thêi gian t¸c ®éng cho qu¸ dßng trung tÝnh: Thêi gian ®éc lËp + Dßng trung tÝnh chØnh ®Þnh : 0.1 A + Thêi gian chØnh ®Þnh : 3.5s + Gãc ®Æc tÝnh : - 60 degrees + §iÖn ¸p d­ tèi thiÓu ®Ó ho¹t ®éng : 2.0 V + Dßng qu¸ nhiÖt Ith : 0.43 A + H»ng sè thêi gian chØnh ®Þnh T : 20 minutes + Dßng chØnh ®Þnh c¶nh b¸o qu¸ nhiÖt : 110% x Ith 11.8 - B¶o vÖ néi bé m¸y biÕn ¸p AT4: - B¶o vÖ r¬ le ga: B¶o vÖ lµm viÖc khi cã c¸c d¹ng sù cè bªn trong thïng dÇu chÝnh cña MBA. Cã 2 møc t¸c ®éng lµ:Møc 1 b¸o tÝn hiÖu vµ Møc 2 c¾t MC. - B¶o vÖ nhiÖt ®é dÇu t¨ng cao : Cã 2 møc t¸c ®éng lµ:Møc 1 b¸o tÝn hiÖu vµ Møc 2 c¾t MC. - B¶o vÖ dïng r¬ le dßng dÇu: §Æt b¶o vÖ ë thïng c«ng t¾c K cña bé ®iÒu ¸p d­íi t¶i, nã còng cã 2 møc t¸c ®éng. - B¶o vÖ ¸p lùc dÇu t¨ng cao. 12-B¶o vÖ m¸y biÕn ¸p AT4. 12.1-B¶o vÖ so lÖch m¸y biÕn ¸p : - B¶o vÖ t¸c ®éng ®­a tÝn hiÖu c¾t MC234 vµ MC134. - Sö dông r¬ le 7UT513( Nhµ chÕ t¹o: ALSTOM). - Th«ng sè ®Æt cña r¬ le: 1100 TRANSFORMER DATA 1102 Rated voltage of winding 1 of transformer : 225.0 kV 1103 Rated apparent power of winding 1: 125.0 MVA 1104 Primary rated current of CT winding 1: 400 A 1105 Starpoint formation of CT winding 1: Khai b¸o theo ®Êu nèi thùc tÕ. 1106 Processing of zero sequence current of wind . 1 Io-elimination 1107 Prim. rated current of starpoint CT wind. 1: 400 A 1108 Earth point formation of starpoint CT wind. 1:Khai b¸o theo ®Êu nèi thùc tÕ. 1121 Vector group numeral of winding 2: 0 1122 Rated voltage of winding 2 of transformer : 115.0 kV 1123 Rated apparent power of winding 2: 125.0 MVA 1124 Primary rated current of CT winding 2: 800 A 1125 Starpoint formation of CT winding 2: Khai b¸o theo ®Êu nèi thùc tÕ. 1126 Processing of zero sequence current of wind . 2 Io-elimination 1127 Prim. rated current of starpoint CT winding 2: 400 A 1128 Earth point formation of starpoint CT wind. 2:Khai b¸o theo ®Êu nèi thùc tÕ. 1600 TRANSFORMER DIFFERENTIAL PROTECTION DATA 1601 State of differential protection : on 1603 Pick-up value of differential current : 0.30 I/InTr 1604 Pick-up value of high set trip: 8.5 I/InTr 1606 Slope 1 of tripping characteristic: 0.25 1607 Base point 2 for slope 2 of tripping characteristic : 2.5 I/InTr 1608 Slope 2 2 of tripping characteristic : 0.50 1610 State of 2nd harmonic restraint : on 1611 2nd harmonic contend in the different . current: 15% 1612 Time for cross-blocking with 2nd harmonic : 10*1P 1613 Choice a further (n-th) harmonic restraint: 5th harmonic 1614 n-th harmonic contend in the differen. current: 40% 1615 Active time for cross-blocking with n-th harmonic: 10*1P 1616 Limit IDIFFmax for n-th harmonic restraint: 1.5 I/InTr 1617 Max. blocking time at CT saturation: 8*1P 1618 Min. current for blocking at CT satur. 7.00 I/InTr 1625 Trip time delay of diff. current stage IDIFF> : 0.00s 1626 Trip time delay of diff. current stage IDIFF>> : 0.00s 1627 Reset delay after trip has been initiated: 0.10s 2900 MEASURED VALUE SUPERVISION 2903 Symmetry threshold for current monitoring: 0.50 I/In 2904 Symmetry factor for current monitoring: 0.50 7400 FAULT RECORDINGS 7402 Initiation of data storage : Storage by fault det 7410 Maximum time period of a fault recording: 1.00s 7411 Pre- trigger time for fault recording: 0.10s 7412 Post-fault time for fault recording: 0.10s 7431 Storage time by initiation via binary input: 0.50s 7432 Storage time by initiation via keyboard: 0.50s 7800 SCOPE OF FUNCTIONS 7801 Selection of the protected object: 2winding- transformer 7806 Selection of star point transformer A: No assignment 7807 Selection of star point transformer B: No assignment 7816 Differential protection: Existent 7819 Restricted earth fault protection: Non- existent 7821 Back - up overcurrent protection: Non- existent 7824 Thermal overload protection 1: Non- existent 7824 Thermal overload protection 2: Non- existent 7830 External trip function 1: Non- existent 7830 External trip function 2: Non- existent 7885 Parameter change-over: Non- existent 7899 Rated system frequency: fN 50 Hz 12.2-B¶o vÖ so lÖch m¸y biÕn ¸p : - B¶o vÖ t¸c ®éng ®­a tÝn hiÖu c¾t MC234 vµ MC134. - Sö dông r¬ le KBCH 130( Nhµ chÕ t¹o: ALSTOM). - Th«ng sè ®Æt cña r¬ le: FUNCTION LINKS Link 1 Enable low set Id> 1 (Yes) Link 2 Enable high set Id>> 1 (Yes) Link 3 Enable REF(Io>) on HV winding 1 (Yes) Link 4 Enable REF(Io>) on LV1 winding 1 (Yes) Link 5 Enable REF(Io>) on Tertiary(LV2) winding 0 (No) Link 7 Enable Overflux Trip 1 (Yes) Link 8 Enable Overflux Alarm 1 (Yes) Link 7 Enable Overflux Block 1 (Yes) CONFIGURATION Configuration HV + LV HV CT Ratio 800/1 LV1 CT Ratio 800/1 HV Ratio Cor 2 HV Vector Cor Ydy0(0deg) LV1 Ratio Cor 1 LV1 Vector Cor Ydy0(0deg) DIFFERENTIAL ELEMENT Low set setting: Id> 0.2 PU High set setting: Id>> 9.0 PU RESTRICTED EARTH FAULT ELEMENT REF setting HV winding: Io> HV 0.1 PU REF setting LV1 winding: Io> LV1 0.1 PU Stabilising resistor: Rs 300 ohms OVERFLUX PROTECTION 5 th harmonic Overflux setting: Iof 40% 5 th harmonic Overflux detector time delay: Tof 10.00s Overflux Trip charateristic: V/f (Trip)Char DT Setting for Overflux Trip: V/f (Trip) 3.00V/Hz Definite time setting for Overflux Trip: tV/f (Trip) 5.00 s Setting for Overflux Alarm: V/f (Alarm) 2.50 V/Hz Definite time setting for Overflux Alarm: tV/f (Alarm) 5.00 s 12.3-B¶o vÖ chèng ch¹m ®Êt h¹n chÕ: - Sö dông r¬ le MCAG 14 ( Nhµ chÕ t¹o: ALSTOM). - Th«ng sè ®Æt cña r¬ le: Curent setting: Is = 0.1 A Stabilising resistor: Rs = 200 ohms 12.4-B¶o vÖ qu¸ dßng cã h­íng phÝa 220kV: - Sö dông r¬ le MCEG 142 ( Nhµ chÕ t¹o: ALSTOM). - Th«ng sè ®Æt cña r¬ le: +Tû sè TI: 400/1 +Tû sè TU: 225/0.11 + TrÞ sè ®Æt: I>>> = 2.15 A Thêi gian c¾t 1.5s I>> = 1.45 A Thêi gian c¾t 2.5s (H­íng BVQD phÝa 220 kV ®­îc ®Æt h­íng vÒ phÝa MBA AT4) 12.5-B¶o vÖ qu¸ dßng ch¹m ®Êt cã h­íng phÝa 220kV: - Sö dông r¬ le MCEG 142 ( Nhµ chÕ t¹o: ALSTOM). - Th«ng sè ®Æt cña r¬ le: +Tû sè TI: 400/1 +Tû sè TU: 225/0.11 + TrÞ sè ®Æt: Ie> = 0.2 A Thêi gian c¾t 4.5s (H­íng cña BVQD ch¹m ®Êt phÝa 220 kV h­íng vÒ phÝa ®­êng d©y 220kV) 12.6-B¶o vÖ qu¸ t¶i nhiÖt: - Sö dông r¬ le MCEG 142 ( Nhµ chÕ t¹o: ALSTOM). - Th«ng sè ®Æt cña r¬ le: Thermal current setting: Ith = 0.85 A Time contstant setting: T = 20 minutes Thermal alarm setting: Ith = 110% Ith Thermal trip : not used 12.7-B¶o vÖ qu¸ dßng cã h­íng phÝa 110kV: - Sö dông r¬ le MCEG 142 ( Nhµ chÕ t¹o: ALSTOM). - Th«ng sè ®Æt cña r¬ le: +Tû sè TI: 800/1 +Tû sè TU: 115/0.11 + TrÞ sè ®Æt: I>>> = 2.1 A Thêi gian c¾t 1.0s I>> = 1.41 A Thêi gian c¾t 2.0s (H­íng BVQD phÝa 110 kV ®­îc ®Æt h­íng ra phÝa ®­êng d©y 110kV) 12.8-B¶o vÖ qu¸ dßng ch¹m ®Êt cã h­íng phÝa 110kV: - Sö dông r¬ le MCEG 142 ( Nhµ chÕ t¹o: ALSTOM). - Th«ng sè ®Æt cña r¬ le: +Tû sè TI: 400/1 +Tû sè TU: 225/0.11 + TrÞ sè ®Æt: Ie>>> = 2.0 A Thêi gian c¾t 1.0s Ie>> = 1.0 A Thêi gian c¾t 2.0s (H­íng BVQD ch¹m ®Êt phÝa 110 kV ®­îc ®Æt h­íng ra phÝa ®­êng d©y 110kV) 12.9 - B¶o vÖ néi bé m¸y biÕn ¸p AT4: - B¶o vÖ r¬ le ga: B¶o vÖ lµm viÖc khi cã c¸c d¹ng sù cè bªn trong thïng dÇu chÝnh cña MBA. Cã 2 møc t¸c ®éng lµ:Møc 1 b¸o tÝn hiÖu vµ Møc 2 c¾t MC. - B¶o vÖ nhiÖt ®é dÇu t¨ng cao : Cã 2 møc t¸c ®éng lµ:Møc 1 b¸o tÝn hiÖu vµ Møc 2 c¾t MC. - B¶o vÖ dïng r¬ le dßng dÇu: §Æt b¶o vÖ ë thïng c«ng t¾c K cña bé ®iÒu ¸p d­íi t¶i, nã còng cã 2 møc t¸c ®éng. - B¶o vÖ ¸p lùc dÇu t¨ng cao. 13- B¶o vÖ m¸y biÕn ¸p tù dïng TD42. - B¶o vÖ t¸c ®éng : C¾t MC342. - Sö dông r¬ le MicomP122( Nhµ chÕ t¹o: ALSTOM). - Th«ng sè ®Æt cña r¬ le: + Dßng chØnh ®Þnh cÊp 1 : 0.11 A + Thêi gian chØnh ®Þnh b¶o vÖ cÊp 1 : 0.05s 14 - B¶o vÖ c¸c hÖ thèng thanh c¸i vµ c¸c b¶o vÖ h­ háng m¸y c¾t. 14.1- B¶o vÖ h­ háng m¸y c¾t vµ b¶o vÖ so lÖch hÖ thèng thanh c¸i 500 kV: 1. Khèi x÷ lý trung t©m (F87M) : Sö dông r¬ le 7SS52. 2. So lÖch thanh c¸i ng¨n lé BO1-1(F87B): Sö dông r¬ le 7SS52. 3. So lÖch thanh c¸i ng¨n lé B01-4(F87B): Sö dông r¬ le 7SS52. 4. So lÖch thanh c¸i ng¨n lé B20-2(F87B) Sö dông r¬ le 7SS52. 5. So lÖch thanh c¸i ng¨n lé B20-4(F87B): Sö dông r¬ le 7SS52. 6. Víi mçi m¸y c¾t 500 kV ®Òu cã mét bé b¶o vÖ h­ háng m¸y c¾t: - Sö dông r¬ le MCTI vµ r¬ le MVTT. - C¸c th«ng sè ®Æt : Is = 0.2 In. t = 200 ms. 14.3- B¶o vÖ h­ háng m¸y c¾t vµ b¶o vÖ so lÖch hÖ thèng thanh c¸i 220 kV: 1. Trªn mçi ng¨n lé ®Òu ®Æt mét b¶o vÖ so lÖch thanh c¸i (F87B) : Sö dông r¬ le: 7SS52. 2. Khèi x÷ lý trung t©m (F87M) : Sö dông r¬ le 7SS52. 3. Víi mçi m¸y c¾t 220 kV ®Òu cã mét bé b¶o vÖ h­ háng m¸y c¾t: - Sö dông r¬ le MCTI vµ r¬ le MVTT. - C¸c th«ng sè ®Æt : Is = 0.2 In. t = 300 ms. 14.3- B¶o vÖ h­ háng m¸y c¾t vµ b¶o vÖ so lÖch hÖ thèng thanh c¸i 110 kV: 1. Khèi x÷ lý trung t©m (F87M) : Sö dông r¬ le 7SS52. 2. Trªn mçi ng¨n lé ®Òu sö dông mét r¬ le 7SS52 víi 2 chøc n¨ng lµ: B¶o vÖ so lÖch thanh c¸i vµ b¶o vÖ h­ háng m¸y c¾t . - C¸c th«ng sè ®Æt cña chøc n¨ng F50BF : Is = 0.2 In. t = 300 ms. V- Trë kh¸ng t­¬ng ®èi trªn thanh c¸i: 220kV: MAX : TTT X1 = 0.04 TTK X0 = 0.016 MIN: TTT X1 = 0.07 TTK X0 = 0.04 110kV MAX : TTT X1 = 0.12 TTK X0 = 0.054 MIN: TTT X1 = 0.15 TT K X0 = 0.1