CAJ | 학술논문

针对220kV板桥变低压侧3组高压并联电容器装置（以下简称电容器装置）投运时，主变高压侧和低压侧三相电流出现相位和波形畸变进行分析。通过现场谐波检测，并进行系统仿真等值计算分析，发现其缘由是由于220kV系统中存在3次谐波电压源，且因板桥变低压侧电容器装置参数配置不合理，导致产生3次谐波串联谐振条件引起3次谐波电流放大，从而造成板桥变高压侧和低压侧电流相位和波形畸变。通过将板桥变其中1组电容器装置内5％串联电抗器调整为12％串联电抗器，以抑制3次谐波的放大，保证了板桥变的正常启动。
침대220kV판교변저압측3조고압병련전용기장치（이하간칭전용기장치）투운시，주변고압측화저압측삼상전류출현상위화파형기변진행분석。통과현장해파검측，병진행계통방진등치계산분석，발현기연유시유우220kV계통중존재3차해파전압원，차인판교변저압측전용기장치삼수배치불합리，도치산생3차해파천련해진조건인기3차해파전류방대，종이조성판교변고압측화저압측전류상위화파형기변。통과장판교변기중1조전용기장치내5％천련전항기조정위12％천련전항기，이억제3차해파적방대，보증료판교변적정상계동。
Both high voltage side and low side of transformer current phasic and wave have been badly changed when the 3 sets of capacitors start up in 220kV transformer substation of Banqiao. . Based on scene test date analysis and system simulation compute, the reason has been found. The voltage resource of third harmonic in 220kV power system and irrational parameter of capacitors is proposed. Irrational parameter of capacitors result in series resonance, so the third harmonic blow up. Both the current phasic and wave have badly changed. The third harmonic blowup can be restrained by reactance ratio adjustment form 5% to 12%in one set of capacitor. So, 220kV transformer substation of Banqiao can be normal put into operation.