摘要
大扰动冲击后,连续监测系统功角稳定性变化态势,并适时实施主动控制降低失稳威胁或限制扰动波及范围,对保障电网安全稳定运行具有重要意义。该文首先针对功角失稳进程中机组δ-P_(g)和δ-Δf_(g)响应轨迹,分析明确了可表征稳定态势的特征状态点,以及机网暂态响应之间的关联关系;在此基础上,提出了基于关键支路Δθ_(k)-P_(k)和Δθ_(k)-Δf_(k)响应轨迹的安全区、警戒区、紧急区和失稳区等4个不同功角稳定水平的区段划分判据,可指导相应主动校正控制、主动追加控制和主动解列控制策略的决策;面向IEEE标准测试系统的仿真结果,验证了功角稳定态势区段划分的正确性和主动控制的有效性。
It is of great significance for the ensurance of the safe and stable operation of power grid to continuously monitor the changing trend of the rotor angle stability of the power grid,and timely implement the active control to reduce the threat of instability or limit the spread range of the disturbance.Firstly,aiming at theδ-P andδ-Δf response trajectories during the generator losing rotor angle instability,this paper analyzes the characteristic state points that characterizes the stable situation and points out the correlation between the generator and branch state points in the grid.Based on the key branchΔq-P andΔq-Δf response trajectories,the section division criteria for four different rotor angle stability levels,that is,the safety zone,the warning zone,the emergency zone and the instability zone,are proposed.The corresponding active correction control,active emergency control and active splitting control strategies will be guided.The simulation results for the IEEE standard test system verify the correctness of the rotor angle stability situation division and the effectiveness of the active control.
作者
郑超
孙华东
李亚楼
ZHENG Chao;SUN Huadong;LI Yalou(China Electric Power Research Institute,Haidian District,Beijing 100192,China)
出处
《电网技术》
EI
CSCD
北大核心
2023年第10期4046-4055,共10页
Power System Technology
基金
国家重点研发计划项目(2021YFB240800)。
关键词
功角稳定
稳定态势
支路暂态输电能力
关键支路
稳定区段划分
主动控制
rotor angle stability
stable situation
branch transient transmission capability
key branch
stable section division
active control
