电力系统受迫振荡检测与自适应振荡抑制研究

Research on the forced oscillation detection and adaptive oscillation suppression in power system

电力系统受迫振荡的振荡频率与系统跨区域振荡模态接近,因而能够引发强烈振荡。文中提出了一种受迫振荡模态检测方法,其通过小信号分析方法得出系统在受迫扰动下对应受迫振荡模态的解析形式;同时提出一种不需要安装额外的功率振荡阻尼器的功率振荡阻尼控制策略,用于抑制受迫振荡以及跨区域振荡。通过改进的14机系统验证了文中方法的鲁棒性和优越性。仿真算例证明所提方法对于外界扰动具有较强鲁棒性,且较传统方法具有明显优越性。

The frequency of power system forced oscillation(FO)is near to the power system inter-area oscillation modal,so it can lead to severe resonances.This paper firstly proposes a novel forced oscillation modal detection method,which aims to obtain the analytic solution of the system force oscillation modes subjected to forced disturbance with small signal analysis;subsequently,this paper develops a power oscillation damping(POD)control approach to mitigate the FO and inter-area oscillation without installing additional PODs.The modified 14-machine power system is developed to verify the robustness and superiority of the proposed method.Simulation examples show that the proposed method is robust to external disturbances and has obvious advantages compared with traditional methods.