并联电容器组无功补偿的谐振抑制方法的仿真研究

摘要

In order to resolve the problem of capacitor disaggregation and circuit oscillation which caused by harmonic hap -pening in reactive power compensation by inputting and removing capacitor bank , the paper proposes a harmonic suppression method of separating harmonic current from total current to real-time monitor, which select full-cycle Fourier algorithm to separate harmonic current from total current .Simulation experiment and monitoring data show that real time monitoring method for separating harmonic current can effectively eliminate the resonance and provide an effective method for power system and the reactive power compensation of resonance suppression .%针对在谐波存在的条件下，投切电容器进行无功补偿时发生谐振而引起电路震荡、电容器解裂这一问题，提出了一种分离谐波电流并实时监控的谐振抑制方法。该方法选用全周傅立叶算法从总电流中分离出谐波电流，通过实时检测谐波电流的大小来判断是否有谐振的发生，在出现谐波电流过大的情况下投切电容器，达到抑制谐振的目的。仿真实验和具体实验装置的监测数据表明，文中提出的分离谐波电流实时监控的方法能够有效地消除谐振，从而又为电力系统的无功补偿中的谐振抑制提供了一种有效的方法。