基于PSCAD/EMTDC下串联补偿电容对铁磁谐振过电压影响的仿真与应用  

Simulation and Application of the Influence of Series Compensation Capacitor on Ferroresonance Overvoltage Based on PSCAD/EMTDC

作　　者：郝耀华 曹斌[2] 王伟[3] 闫峰 陈建强 HAO Yaohua;CAO Bin;WANG Wei;YAN Feng;CHEN Jianqiang(Inner Mongolia University of Technology,Hohhot 010020,China;Inner Mongolia Electric Power Research Institute,Hohhot 010020,China;Inner Mongolia Hohhot Power Supply Bureau,Hohhot 010000,China;Inner Mongolia UHV Power Supply Bureau,Hohhot 010000,China)

机构地区：[1]内蒙古工业大学电力学院,呼和浩特010020 [2]内蒙古电力科学研究院,呼和浩特010020 [3]内蒙古呼和浩特供电局,呼和浩特010000 [4]内蒙古超高压供电局,呼和浩特010000

出　　处：《高压电器》2019年第12期205-210,共6页High Voltage Apparatus

摘　　要：为解决高压变电站中性点不接地的配电网中的铁磁谐振过电压问题,笔者通过对铁磁谐振原理的分析提出串联补偿电容消谐方法。基于PSCAD/EMTDC对500 k V变压器进行精准建模并且仿真,仿真结果表明,当系统发生铁磁谐振时投入串补电容后,铁磁谐振明显得到了抑制,并逐渐消除,恢复正常。在某500 kV变电站35 kV谐振侧投入串补电容,根据现场实时录波,进一步验证了串补消谐的正确性和可行性,有较强的工程使用价值。In order to solve the problem of over-voltage of ferromagnetic resonance in distribution network with ungrounded neutral point of high voltage substation,the author puts forward the method of harmonic elimination of series compensating capacitor by analyzing the principle of ferroresonance.Based on PSCAD/EMTDC,the 500 kV transformer is accurately modeled and simulated.The simulation results show that the ferroresonance is obviously suppressed and gradually returned to normal after the series compensation capacitor is put into the system.In a 500 kV substation 35 kV resonant input string compensation capacitor,according to the scene real-time recording,to further verify the correctness and feasibility of string complement harmonic elimination,a strong engineering value.

关 键 词：铁磁谐振 过电压 电压互感器 电容 消谐 

分 类 号：TM7[电气工程—电力系统及自动化]