基于一体化电磁骚扰传导模型的开关柜微机保护装置电磁干扰滤波器设计  

Design of EMI Filter for Microcomputer Protection Device of Switchgear Based on Integrated Electromagnetic Disturbance Conduction Model

作　　者：王华清 黄道春 双明镜[1,2] 毕吉禹 罗瑞杰 Wang Huaqing;Huang Daochun;Shuang Mingjing;Bi Jiyu;Luo Ruijie(Engineering Research Center of Ministry of Education for Lightning Protection and Grounding Technology,Wuhan University,Wuhan,430072,China;School of Electrical Engineering and Automation,Wuhan University,Wuhan,430072,China)

机构地区：[1]雷电防护与接地技术教育部工程研究中心(武汉大学),武汉430072 [2]武汉大学电气与自动化学院,武汉430072

出　　处：《电工技术学报》2024年第11期3280-3290,共11页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划资助项目(2017YFB0902400)。

摘　　要：为解决高压开关柜断路器在海上风电场等场景下频繁操作产生的电磁干扰问题,分析其电磁骚扰传导过程,并设计合理的抗干扰措施以提高微机保护装置的电磁兼容水平,该文提出一种高压开关柜一体化电磁骚扰传导仿真模型,针对断路器开断电磁骚扰设计了电磁干扰(EMI)滤波器并验证其性能。首先以KYN61—40.5型开关柜真空断路器为例,建立其电磁骚扰一体化仿真模型,通过试验与仿真获得断路器开断电磁骚扰的特征;然后根据该特征设计了基于定K型和m推演的EMI滤波器并验证其性能。研究结果表明,微机保护装置电流测量端口的骚扰电压主导频率约为312 kHz,一体化电磁骚扰传导仿真模型仿真结果与试验结果最大相对误差为9.8%,表明该模型可用于电磁骚扰传导过程的仿真;该文设计的EMI滤波器的陷波频率与理论设计值的最大相对误差为-8.8%,接入EMI滤波器后骚扰电压下降93.94%,持续时间下降71.42%。研究成果可为高压开关柜微机保护装置的电磁骚扰传导过程分析和电磁兼容水平提升提供参考。In scenarios such as offshore wind farms and distributed intelligent power distribution networks,the stochastic fluctuations of new energy output,electric vehicle charging and discharging,and energy storage equipment cause the power grid to frequently suffer from electromagnetic transient impact.To ensure the safety of key equipment such as transformers and power electronic devices,it is necessary to quickly interrupt faulty devices or lines.As a result,high-voltage switchgear circuit breakers frequently operate,causing a large amount of electromagnetic interference,leading to a serious threat to secondary equipment.The source of electromagnetic interference during the interruption of high-voltage switchgear is the vacuum circuit breaker,and the disturbed devices are intelligent electronic devices.The electromagnetic interference mainly has three transmission paths,involving devices including the vacuum circuit breaker and its distributed capacitance,current transformers,secondary cables,intelligent electronic device(IED),and ground grid.To accurately analyze the impact of the disturbance voltage generated by the breaker's interruption on the IED's port,it was necessary to study the complete process of electromagnetic interference conduction.However,in actual power systems,the switchgear can operate under various conditions,making systematic electromagnetic interference tests difficult.Therefore,the electromagnetic transient simulation could be used to analyze the characteristics and conduction process of the breaker’s interruption.The paper took the KYN61-40.5 high-voltage switchgear as an example and established the integrated electromagnetic disturbance conduction model through the finite element simulation and sweep frequency methods.The test and simulation results showed that the simulated wave amplitude,dominant frequency,and duration of the breaker's primary side voltage were 342 V,312 kHz,and 59.2μs,respectively.The maximum relative error compared with the experimental results was 6.0%,and the waveform

关 键 词：高压开关柜 电磁骚扰 电磁兼容 低通滤波器 一体化传导模型 

分 类 号：TM154.3[电气工程—电工理论与新技术]