CAJ | 학술논문

为解决500 kV山河乙线串补电容器不平衡告警故障,通过进行动模试验和仿真试验验证,发现低通滤波器的截止频率较高、电容器电流高次谐波含量大而引起电容器不平衡电流增大是电容器不平衡告警的主要原因,可通过降低低通滤波的截止频率以及增加不平衡电流互感器抗干扰能力等措施去解决该问题.
위해결500 kV산하을선천보전용기불평형고경고장,통과진행동모시험화방진시험험증,발현저통려파기적절지빈솔교고、전용기전류고차해파함량대이인기전용기불평형전류증대시전용기불평형고경적주요원인,가통과강저저통려파적절지빈솔이급증가불평형전류호감기항간우능력등조시거해결해문제.
To solve the series compensation capacitor imbalance alarm failures in 500 kV Dushan-Hechi Line B, dynamic model test and simulation verification are carried out, and it is found that the higher cut-off frequency of the low-pass filter, and the large content of high order harmonic wave of the capacitor current are the main reasons causing the increase of the capacitor unbalance current, leading the capacitor imbalance alarm. By reducing the low-pass filter cut-off frequency and increasing the current transformer’s anti-interference ability for imbalance current, the problem can be settled.