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郑州500kV变电站的静止无功补偿装置是瑞典ABB公司产品,去年9月3日静补FCI的B相电容器爆炸起火损坏后,改用国产电容器代替,为了解其正常投切时的操作过电压特性及与原A、C相进口电容器的匹配情况,对FCI电容器组进行投切试验,结果如下:1、FCI支路总电流满足规定的电容器支路受谐波影响总电流小于额定电流1.3倍的要求,B相电容器谐波电流、电压的总畸变率及各次谐波分量与更换前的基本相同;2、FCI不平衡电流保护的整定值,可保证在出现单只及以上电容器故障时可靠动作;
The static reactive power compensation device of Zhengzhou 500kV substation is a product of ABB Company of Sweden. After the FCI phase B capacitor was damaged and exploded in fire on September 3 last year, it was replaced by a domestic capacitor. In order to understand the operation overvoltage characteristic during normal switching And with the original A, C phase capacitor import match, the FCI capacitor group to cut test, the results are as follows: 1, FCI branch total current to meet the provisions of the capacitor branch by the harmonic current total current less than 1.3 times the rated current Requirements, B-phase capacitor harmonic current, the total voltage distortion and harmonic components of each harmonic before replacement; 2, FCI unbalanced current protection setting, in the event of single and above the capacitor failure can be reliable action;