计及MOA拟合特性的断线谐振过电压混沌性分析  

Chaos Analysis of Line-Break Resonance Overvoltage Considering MOA Fitting Characteristics

作　　者：杨海运 郜志[1] 宫艳朝 苗俊杰 吴伟丽[3] 奚涛 YANG Haiyun;GAO Zhi;GONG Yanchao;MIAO Junjie;WU Weili;XI Tao(State Grid Handan Power Supply Company,Handan 056000,China;State Grid Hebei Electric Power Company,Shijiazhuang 050000,China;Xi'an University of Science&Technology,Xi'an 710054,China;Anhui Zhengguang Television Power Technology Co.,Ltd.,Hefei 230000,China)

机构地区：[1]国网邯郸供电公司,河北邯郸056000 [2]国网河北省电力公司,石家庄050000 [3]西安科技大学,西安710054 [4]安徽正广电电力技术有限公司,合肥230088

出　　处：《电瓷避雷器》2022年第6期85-91,共7页Insulators and Surge Arresters

基　　金：国家电网公司科技项目“电容器组开断过电压抑制方法研究”(编号:SGHEHD00JXJS1900653)。

摘　　要：为了避免断线谐振故障所产生的过电压对避雷器造成损伤,应用混沌数学理论,提出一种考虑雷器拟合特性的断线谐振过电压混沌性分析方法:首先,搭建避雷器在内断线谐振系统等值模型,并用状态方程描述断线谐振过程中避雷器的作用,从数学的角度解释了避雷器限制过电压的机理;其次,根据实际系统参数搭建了断线谐振系统仿真模型,并考虑氧化锌避雷器的伏安拟合特性加以仿真,得到断线后变压器高压进线侧的电压波形和相轨迹曲线,对比分析发现,避雷器并联在变压器高压进线侧可以钳制断线谐振过电压,不过避雷器不同的伏安特性段的抑制过电压效果有所不同,据此可以确定抑制过电压的避雷器流通电流阈值。研究成果可望为避雷器谐振过电压提供数学理论依据,也可为避雷器性能改善提供指导。In order to avoid the damage of overvoltage caused by line break resonance fault to arrester,a chaos analysis method of line break resonance overvoltage considering fitting characteristics of arrester is proposed by applying chaos mathematics theory.Firstly,the equivalent model of internal line break resonance system of arrester is built,and the function of arrester in the process of line break resonance is described by state equation.Secondly,according to the actual system parameters,the simulation model of line break resonance system is built,and the volt ampere fitting characteristics of MOV are considered to simulate,and the voltage waveform and phase trajectory curve of transformer high voltage incoming line side after line break are obtained.However,the effect of restraining overvoltage vary in different volt ampere characteristic section of arrester,and the current threshold of arrester can be determined based on this.The research results are expected to providea mathematical basis for the resonant overvoltage of arresters,and also provide guidance for the improvement of arrester performance.

关 键 词：断线谐振 过电压 氧化锌避雷器 分段模型 

分 类 号：TM862[电气工程—高电压与绝缘技术]