调速系统引入远方信号抑制区域低频振荡可行性研究

Feasibility Study on Governor-side Damping Controller for Inter-area Low Frequency Oscillation of Power System with Remote Signal

大型互联电力系统区域低频振荡的抑制是电力系统稳定性控制研究的热点之一。已有的研究往往忽略原动机对低频振荡的影响。本文以四机两区域系统为例,采用特征根方法,分析了汽轮机调速系统引入远方信号抑制系统区域低频振荡的可行性。仿真结果表明:多机系统中,若在发电机调速系统中引入与区域振荡模式相关的远方机组的速度偏差信号,并合理配置控制策略,可有效地抑制系统的区域低频振荡。

Damping controller for the inter-area low frequency oscillation （LFO） of large-scale interconnected power system is one of the focuses of the power engineering. The impact of the prime mover and govern system on LFO is omitted in the traditional research. This paper analyzes the possible implementation of damping the LFO based on the governor control with the remote signal in the light of classical two-area four-machine power system. The simulation and analysis shows that with the remote signals which are related to the inter-area LFO, the governor side controller may effectively damp the inter-area oscillation, provided that the control strategic are properly set.