UPFC抑制电网强迫振荡研究

Research on UPFC for Suppressing Forced Oscillation in the Power System

为了抑制电网系统强迫振荡,首先通过整定合理统一潮流控制器(UPFC)主控制器参数,利用UPFC自身的动态控制作用提高系统阻尼水平;然后在其主控制器中加入辅助控制器,通过跟踪强迫振荡功率波动量并输出反相功率波对其进行抵消,从而进一步提高系统阻尼,增强UPFC对系统强迫振荡的抑制能力。在PSASP仿真平台中搭建模型,验证了所提UPFC主控制器及辅助控制器能有效抑制系统区域间联络线上的强迫振荡,从而尽可能减小强迫振荡对系统造成的损害。

In order to suppress the forced oscillation of the power system,the damping coefficient of the system is improved by setting the parameters of the UPFC main controller. Then,the auxiliary controller is added into the main controller to track the forced oscillation power fluctuation and to output the inverted power wave to suppress the system forced oscillation. It can further improve the system damping coefficient and enhance the suppression ability of the UPFC to the forced oscillation in the system. A model is built in the PSASP simulation platform to verify that the proposed UPFC main controller and the auxiliary controller can effectively suppress the forced oscillation on the tie line between the system regions. Thereby the damage to the system caused by forced oscillation can be minimized.