SVC广域辅助控制阻尼区域间低频振荡

SVC已经广泛应用于电力系统的无功支持和电压控制,广域测量系统在国内外也已有许多工程应用.本文利用广域测量信号为输入设计SVC的附加阻尼控制(PSDC).首先阐述了SVC提供阻尼的机理,然后提出了综合留数指标的概念,并据此选择具体的控制输入信号;接着基于测试信号法和留数根轨迹方法相结合进行PSDC的参数设计;并利用PSS/E进行了特征值分析和时域仿真分析验证了所设计的附加阻尼控制器的有效性.最后针对国内某实际电网外送工程中安装的SVC设计了相应的阻尼控制器,时域仿真证明了SVC广域附加阻尼控制的有效性.

SVC Supplementary Controller Based on Wide Area Signals to Enhance Damping of Inter-Area Oscillation

SVC is used in power system for the purpose of reactive power support and voltage control. Wide area measurement system (WAMS) has been widely used in modern power systems. This paper describes a systematic approach to design a SVC supplementary controller for improving the damping of power system oscillation (PSDC) based on wide area signals. Firstly the principle of SVC oscillation damping is described. Secondly the concept of synthetical residue index is given and is used to choose the proper input wide area signal. Then the test signal method and residue root locus are adopted to design controller parameters. The third part of the paper proves the effectiveness of the method by eigenvalue analysis and time domain simulation. Then in the last part of the paper the SVC supplementary control is applied to a real grid. And the control effect is shown by time domain simulation in a simple example and a real grid.