摘要
交直流受端电网的电压稳定特性与直流系统的控制策略和运行状态密切相关。本文提出一种计及直流系统过渡方式的静态电压稳定计算方法,通过对直流换流器在过渡方式中的电压响应特性进行机理分析,构建了直流换流器控制模式的切换策略;在连续潮流方程中引入直流功率参与因子表征在过渡方式中直流系统的参与作用,可有效解决直流馈入功率参与负荷功率增量平衡场景下的静态电压稳定分析问题。南方电网某直流受端区域电网静态电压稳定分析算例验证所提方法的有效性,并对受端直流换流器运行控制策略及直流参与因子等进行了深入比对分析,对交直流受端电网的运行与控制具有参考价值。
The voltage stability characteristics of the AC/DC receiving-end grid are closely related to the control strategy and operating status of the DC system.This paper proposes a static voltage stability calculation method considering the transition operation mode of the DC system.Through the mechanism analysis of the voltage response characteristics,the switching strategy of the converter control mode is constructed.The introduction of the DC power participation factor into the continuous power flow equation characterizes the participation of the DC system in the transition mode,which effectively solves the static voltage stability analysis in the scenario where DC power participates in the incremental load balance.An example of static voltage stability analysis of a receiving-end regional power grid of CSG verifies the effectiveness of the proposed method,and an in-depth comparison and analysis of the converters'operation control strategy and HVDC power participation factors are conducted.The research results have reference value for the operation and control of AC/DC receiving-end power grids.
作者
李晖
盖振宇
蔡东阳
陈刚
江出阳
周保荣
姚文峰
LI Hui;GAI Zhenyu;CAI Dongyang;CHEN Gang;JIANG Chuyang;ZHOU Baorong;YAO Wenfeng(State Grid Economic Research Institute,Beijing 102209,China;State Key Laboratory of HVDC,Electric Power Research Institute,CSG,Guangzhou 510663,China)
出处
《南方电网技术》
CSCD
北大核心
2021年第5期12-19,共8页
Southern Power System Technology
关键词
静态电压稳定
过渡方式
控制模式切换
直流受端
static voltage stability
transition operation mode
control mode switching
HVDC receiving end
