微机型发电机变压器保护投运试验及检查  

Commissioning test and check on microprocessor-based protection for generator and transformer

作　　者：华伟[1] 石结银[1] 李玉海[1] 

机构地区：[1]国电南京自动化股份有限公司,江苏南京210003

出　　处：《电力自动化设备》2004年第10期88-92,96,共6页Electric Power Automation Equipment

摘　　要：发电机组在投运前及投运试验过程中,有必要对其继电保护装置及二次回路进行试验和检查。机组启动前应进行远方通流试验、远方加压试验及操作试验;机组启动过程中应进行机组短路试验时各种测量以及发电机空载升压过程中的测量和检查;在负荷工况下应进行发电机定子匝间保护负序功率方向元件正确性检查、机端及中性点三次谐波电压的测量、各差动保护差流的测量;另外还需要进行变压器零序方向过电流保护动作方向正确性的检查。给出了各种检查中的情况分析,提高了继电保护动作可靠性。Before and during the commissioning of generator ,it ' s necessary to test its protection relays and secondary circuit.Remote discharge current test ,remote pressurizing test and operation test are needed for prestart check.Without load ,the measurements of unit short circuit test during starting ,and the measurements and check of generator during pressure raising should be carried out.With load ,the validity check of negative-sequence power direction component for generator stator inter-turn protection ,the measurements of third-harmonic voltages of generator ports and neutral point ,and the measurements of differential currents of differential protections should be carried out.The validity check of zero-sequence operating direction for transformer directional over-current protection is also essential.Analysis in different conditions is presented ,which improves the reliability of protection relays.

关 键 词：继电保护 二次回路 启动试验 带负荷试验 过流保护 

分 类 号：TM772[电气工程—电力系统及自动化]