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随着电网的快速发展,系统结构和运行方式不断发生变化,传统广域阻尼控制器(wide area power system stabi-lizer,WAPSS)不能保证其在各种运行状态下控制效果;此外,互联系统在投入多台WAPSS时,各控制器之间面临相互协调问题。该文将无模型自适应控制(model free adaptive control,MFAC)应用于多输入多输出(multi-input multioutput,MIMO)的WAPSS设计中,给出了适用于MIMO广域阻尼控制的MFAC改进算法,并讨论了MFAC改进控制算法参数设置方法。在川渝和华中电网互联系统中测试改进算法的控制效果,仿真结果表明:MIMO-MFAC-WAPSS能适应系统变化,有效抑制多个区间低频振荡模式,并实现了多个控制器之间的相互协调。
With the rapid development of the power grid, the structure and operation mode of the system keep changing. The traditional wide area power system controller (WAPSS) can not guarantee the control effect under various operating conditions. In addition, When multiple WAPSSs are deployed, the controllers face mutual coordination issues. This paper applies model free adaptive control (MFAC) to WAPSS design of multi-input multi-output (MIMO), and presents an improved MFAC algorithm for MIMO wide area damping control. The method of parameter setting of MFAC improved control algorithm is discussed. The simulation results show that the MIMO-MFAC-WAPSS can adapt to the system changes, effectively suppress the low-frequency oscillation modes in multiple intervals and realize the mutual control among multiple controllers coordination.