永磁饱和型高压直流限流器参数优化设计  

Optimal Design of Parameters for High Voltage DC Fault Current Limiter with Permanent-magnet-biased Saturation

作　　者：袁佳歆[1,2] 张哲维 周航 甘鹏程[1] YUAN Jiaxin;ZHANG Zhewei;ZHOU Hang;GAN Pengcheng(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,China;Shenzhen Institute of Wuhan University,Shenzhen 518057,China)

机构地区：[1]武汉大学电气与自动化学院,湖北省武汉市430072 [2]武汉大学深圳研究院,广东省深圳市518057

出　　处：《电力系统自动化》2020年第13期135-142,共8页Automation of Electric Power Systems

基　　金：国家重点研发计划资助项目(2017YFB0902904)。

摘　　要：随着高压直流系统短路电流水平的提升,故障电流可能超出断路器遮断容量,或使其体积与成本急剧增加。使用故障限流器抑制故障电流上升速度,能够降低对直流断路器性能的要求。其中,永磁饱和型故障限流器具有无需外加控制、自动响应、无需外加励磁电流和损耗较低等优点。目前限流器参数设计主要针对稳态电感值,考虑暂态特性的参数设计及优化方法仍待研究。为此,文中提出一种用于直流系统的永磁饱和型故障限流器参数优化设计方法。首先,介绍了该类型限流器的工作原理。其次,提出了限流器优化设计的约束条件和优化目标函数,以成本最低为目标进行了限流器参数优化设计。最后,建立了有限元和电路仿真模型进行仿真计算,并研制了一台限流器样机,进行了试验。仿真和试验结果表明:采用所提方法可以设计出符合要求的限流器,降低了限流器成本,减小了直流断路器分断过程中的应力。With the increase of the short-circuit current level in high voltage direct current(HVDC)system,the fault current may make circuit breakers have either insufficient capacity,or larger size and higher cost.Using fault current limiter(FCL)can slow down the rising rate of fault current and reduce the performance requirements on DC breakers.FCL with permanent-magnet-biased saturation has advantages of automatic response,low power loss,and does not need external control and exciting circuit.The parameter design methods in previous works mainly focus on inductance in steady state,while the parameter design and optimization method of characteristic in transient process still needs to be studied.An optimization design method of FCL with permanent-magnet-biased saturation for DC system is proposed.Firstly,the working principle of the proposed FCL is introduced.Then,constraints and optimization object functions of optimal design for FCL are given,and an optimal design of parameters for FCL is obtained with the lowest cost.Finally,the simulation model of finite element and circuit is established and experiment with an FCL prototype is conducted.The simulation and experiment results show that the proposed method can be used to design the FCL,which can meet the requirements,reduce the cost of FCL and the electrical stress of the DC breaker during fault breaking.

关 键 词：永磁饱和型故障限流器 直流输电 断路器 应力 

分 类 号：TM561[电气工程—电器]