并联电容补偿装置中电抗器过电压保护的研究

Research on Overvoltage Protection for the Reactor in a Shunt Capacitance Compensation System

电气化铁道并联电容补偿装置自投运以来屡屡出现电抗器烧损的严重惯性故障。本文作者利用Pro-tel软件对电气化铁道并联电容补偿装置过电压进行仿真分析,得到电抗器在投入运行时,要承受到交流峰值50kV的过电压;在断路器开断电容器组时,电抗器要承受91.2 kV的冲击过电压,进而提出在电容器和电抗器之间并联1台10 kV氧化锌避雷器,并进行实际运行验证,证明其电抗器过电压保护对策的正确性。

Since the shunt capacitance compensation system was put into use in electrification railroad,serious accidents have repeatedly occurred in the shunt capacitance compensation system due to reactor burning.Protel software is used to perform factual analysis for shunt capacitance compensation system in electrification railroad in this paper.The conclusion is drawn that reactor must withstand the overvoltage of 50kV during exchange peak value once the reactor is put into use while when the capacitor is broken,the reactor has to withstand the impacting over-voltage of 91.2 kV.This paper proposes that if one 10kV MOA is paralleled between capacitor and reactor,it is proved that the scheme for reactor over-voltage protection is correct through practical implementation.