基于瞬时对称分量法的电网无功补偿方法

针对电网无功补偿需测量相角,无法实现实时补偿的问题,提出一种实时求取系统无功功率的方法,它将瞬时无功理论和对称分量法相结合,利用实时序分量功率实现系统无功补偿,并将其应用在有电弧炉的配电网系统中。MATLAB仿真表明:该方法可以实现三相不平衡系统的无功功率补偿且没有时间延迟,从而保证了无功功率的稳定,解决了无功功率波动引起的电压波动问题。

Reactive Power Compensation for Power System Based on Instantaneous Symmetrical Component Method

To solve the problem that the phase angle needs measurement for the reactive power compensation and the real-time compensation cannot be achieved,a real-time calculation method for the reactive power is proposed.Through combining the instantaneous reactive power theory with the symmetrical components,the reactive power compensation is achieved by using the real-time sequence component,which is applied in the distribution power system with electric arc funace.MATLAB simulation results show that the proposed method of reactive power compensation can be achieved without the delay,which ensures the stability of reactive power and solves the voltage fluctuations induced by the reactive power fluctuation.