特高压交流输电线路甩负荷过电压影响因素研究  

Research on Influence Factors of Load Rejection Overvoltage in UHV AC Transmission Lines

作　　者：雷鸣 孙冠群 王义凯[3] 马望 王尔玺 LEI Ming;SUN Guanqun;WANG Yikai;MA Wang;WANG Erxi(State Grid Hubei Electric Power Co.,Ltd.,Wuhan Hubei 430048,China;State Grid Hubei Electric Power Research Institute,Wuhan Hubei 430077,China;North China Electric Power University(Baoding),Baoding Hebei 0071003,China)

机构地区：[1]国网湖北省电力有限公司,湖北武汉430048 [2]国网湖北省电力有限公司电力科学研究院,湖北武汉430077 [3]华北电力大学(保定),河北保定071003

出　　处：《湖北电力》2024年第3期30-36,共7页Hubei Electric Power

基　　金：国家自然科学基金青年科学基金项目(项目编号:52407100)。

摘　　要：特高压交流输电技术是我国能源发展的重要战略。由于特高压交流输电系统容量大且距离长,系统过电压等现象对系统的影响更大,亟需研究过电压的具体影响因素,并提出抑制措施。通过对特高压交流输电线路甩负荷过电压的影响因素进行分析及研究,以理论推导的方式,指出了线路过电压的数值与线路的阻抗、输送电流、功率因数存在直接关系,引出了待研究的影响因素。其次,建立了特高压交流输电线路甩负荷过电压分析模型,为后文的仿真验证奠定了模型基础。最后,基于电磁暂态仿真软件对特高压交流线路断路器分闸电阻、输电线路传输功率、电抗器参数进行了仿真分析,得出了特高压交流输电线路甩负荷过电压抑制措施,为工程应用提供参考,从而减轻过电压对系统的影响。UHV AC transmission technology is an important strategy of energy development in China.Due to the large capacity and long distance of UHV AC transmission system,the system overvoltage and other phenomena have a greater impact on the system,so it is a urgent need to study the specific influencing factors of overvoltage and put forward suppression measures.This paper first makes analyses and studies on the influence factors of load shedding overvoltage in UHV AC transmission lines,and in a theoretical way,points out that the value of line overvoltage is directly related to the impedance,transmission current and power factor of the line,drawing out the influence factors to be studied.Secondly,the analysis model of load shedding overvoltage of UHV AC transmission line is established,laying the model foundation for the later simulation verification.Finally,the electromagnetic transient simulation software is used to carry out the simulation analysis of UHV AC line circuit breaker breaking resistance,transmission power of the transmission line,parameters of the reactor,deriving the UHV AC transmission line load shedding overvoltage suppression measures,which provides a reference for engineering applications,thus mitigating the impact of overvoltage on the system.

关 键 词：特高压交流 甩负荷过电压 分闸电阻 电抗器 抑制措施 

分 类 号：TM744[电气工程—电力系统及自动化]