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统一潮流控制器(UPFC)的主要控制功能是潮流控制和电压控制,控制的水平由控制器的设定参考值决定。它们也是文中所指的UPFC的控制运行点,即UPFC安装线路上由UPFC调节达到的输送的有功和无功水平,以及安装母线上由UPFC控制达到的电压水平。文中讨论了UPFC控制运行点变化对电力系统稳定性的影响。同时还发现,控制运行点在较大程度上决定了控制器的控制性能和2个UPFC之间的交互影响。通过2个装有UPFC的电力系统的仿真结果证实了文中的讨论。
The main control functions of the UPFC are power flow control and voltage control. The level of control is determined by the controller’s set reference value. They are also the control points of operation of the UPFC as referred to in the text, namely the delivered active and reactive power level regulated by UPFC on the UPFC installation line and the voltage level reached by the UPFC control on the installed bus. In this paper, the influence of UPFC control operation on the stability of power system is discussed. It is also found that the control operation point to a large extent determines the control performance of the controller and the interaction between the two UPFCs. The simulation results from two UPFC-equipped power systems confirm the discussion in this paper.