受端交直流互馈特性的电网电压失稳机理分析  

Analysis of Voltage Instability Mechanism of Power Grid

作　　者：陈玥如 CHEN Yueru(State Grid Shanxi Electric Power Company,Linfen Power Supply Company,Linfen 041000,China)

机构地区：[1]国网山西省电力公司临汾供电公司,山西临汾041000

出　　处：《电工技术》2023年第21期134-136,共3页Electric Engineering

摘　　要：直流输电作为一种新兴的高效、低损耗的电力传输方式,得到了广泛的关注和应用。然而,在实际的电网运行中,受端交直流互馈特性可能会引起电网电压的失稳现象,对电网的安全运行造成了一定的影响。为此,通过分析受端交直流互馈特性对电网电压失稳的影响机理,探讨直流接入对受端系统电压稳定性的影响,通过算例验证直流受端无功-电压特性。该研究对于提高电网的稳定性和可靠性具有重要的理论和实际意义,也为后续相关研究提供了参考。As a new efficient and low-loss power transmission mode,DC transmission has been widely concerned and applied.However,during practical operation of power grid,the characteristics of AC/DC mutual feeding at the receiving end may cause voltage instability,which has a certain impact on safe operation of power grid.Therefore,this paper analyzes how AC/DC mutual feeding characteristics induce voltage instability,discusses the influence of DC access on voltage stability of receiving end system,and verify the reactive-voltage characteristics of DC receiving end through case calculation.This study has important theoretical and practical significance for improving stability and reliability of power grid,and also provides a reference for subsequent related research.

关 键 词：直流逆变器 电压失稳 交直流互馈特性 无功补偿 

分 类 号：TM721[电气工程—电力系统及自动化]