特高压直流极母线避雷器运行安全测试技术研究  

Research on Operation Safety Test Technology of UHV DC Pole Bus Arrester

作　　者：赵珏斐[1] 芮新花[2] ZHAO Juefei;RUI Xinhua(State Grid Nanjing Power Supply Company,Nanjing 210013,China;School of Electric Power Engineering,Nanjing Institute of Technology,Nanjing 211167,China)

机构地区：[1]国网南京供电公司,南京210013 [2]南京工程学院电力工程学院,南京211167

出　　处：《电瓷避雷器》2020年第5期134-139,共6页Insulators and Surge Arresters

摘　　要：特高压直流极母线避雷器在运行过程中容易出现电流涌动干扰,会对其运行安全性产生不良影响。提出了一种基于直流振荡频率负阻尼特性分析的特高压直流极母线避雷器运行安全测试技术。以电压、基线电流、电磁感应强度等参数为约束参数,模糊相关性融合特征量方程;建立特高压直流极母线避雷器的稳态控制模型;基于直流振荡频率负阻尼特性,采用模糊信息融合方法进行特高压直流极母线避雷器运行状态的稳态模型构造;建立特高压直流极母线避雷器运行稳态特征方程,结合正阻尼重构的的稳定控制方法进行特高压直流极母线避雷器运行状态特征分析;在逆变侧小扰动作用下通过滤波检测方法进行特高压直流极母线避雷器运行的安全参数估计,结合最大似然估计和最小二乘拟合方法,进行避雷器运行安全测试和参数优化。仿真及实际运行效果结果表明,采用该方法进行特高压直流极母线避雷器运行安全性测试的输出稳态性较好,可提高了避雷器运行安全性。During the operation of UHV DC bus arrester,it is easy to be interfered by current surge,which will have a bad impact on its operation safety. Based on the analysis of the negative damping characteristics of DC oscillation frequency,the author presents a safety test technology for UHV DC bus arrester. The parameters such as voltage,baseline current and electromagnetic induction intensity are taken as the constraint parameters,and the fuzzy correlation fusion characteristic equation is used. The steady-state control model of UHV DC bus arrester is established. The negative damping characteristic of DC oscillation frequency is used. The fuzzy information fusion method is used to construct the steady-state model of UHVDC bus arrester operation state;the steady-state characteristic equation of UHVDC bus arrester operation is established,and the characteristic analysis of UHVDC bus arrester operation state is carried out by combining the stability control method of positive damping reconstruction;under the small perturbation of the inverter side,the safety parameters of UHV DC bus arrester operation were estimated by filtering detection method. Combined with the maximum likelihood estimation and least square fitting method,the safety test and parameter optimization of the arrester operation were carried out. The results of simulation and practical operation show that the output stability of the method is good,and the operation safety of the arrester is improved.

关 键 词：直流避雷器 电流涌动 约束参数 逆变侧 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM862