电力系统继电保护(英文简介).ppt

1、Relay protection of power system-School of Energy Science and Engineering-ChenYu Introduction of power system1 Three state of power system 2Basic Principles and Elements of Relay Protection3The requirement of relay protection4StructureNortheastTibetNorth ChinaNorthwestSouth ChinaCentral ChinaEast Ch

2、inaTaiwan500KV AC(2)2001/051200 MW 500KV DC(3)1989/2003/22077200 MW 500KV AC(1)2003/09800 MW 120KV DC(1)2005/06360 MW 500KV DC(1)2004/023000 MW 500KV AC(3)20011900 MW 500KV AC(2)2006/061200 MW State Grid Corporation Grid interconnectiongenerate generate generate generate powerpowerpowerpoweruseuseus

3、euseelectricityelectricityelectricityelectricitytransmit transmit transmit transmit electricityelectricityelectricityelectricitytransformate transformate transformate transformate powerpowerpowerpowerdistributedistributedistributedistributepower power power power RTURTURTURTURTURTUData acquisition D

4、ata acquisition and transmissionand transmissionApplication serverApplication serverApplication serverApplication serverpower network dispatchingpower network dispatchingpower network dispatchingpower network dispatchingPower systemElectrical equivalent modelThree state of power systemStandard of No

5、rmal Operation ConditionState of Fault Abnormal Operation Condition 1 23Standard of Normal Operation ConditionEquality constraint：Inequality constraint：Abnormal Operation ConditionThe common abnormal stateOverloadOver voltage low voltageOscillationfrequency step downfrequency increaseState of Fault

6、and Its ThreatsFault typeThree-phase shortcircuitTwo phase short circuitTwo phase short circuit groundingSingle phase grounding short circuitOther faultsThe number of faults2010838219645The percentage of fault0.834.49%1.58%91.23%1.86%Chinese 220kV power transmission line fault statistics in 2008Basic Principles and Elements of Relay ProtectionNAS9210 series integrated protection deviceNARI RCS-900 line protection deviceThe block diagram of relay protection deviceRelay protection cabinetThe requirement of relay protectionReliabilitySelectivity SpeedSensitivity