一种经济型直流负荷开关的技术研究  

Technical Research on the Economical DC Load Switch

作　　者：梁基涛 纪江辉 王其中[1] LIANG Ji-tao;JI Jiang-hui;WANG Qi-zhong(XJ Group Co.,Ltd,Xuchang 461000,China)

机构地区：[1]许继集团有限公司,河南许昌461000

出　　处：《电工电气》2023年第1期22-27,共6页Electrotechnics Electric

基　　金：国家电网有限公司科技项目(5500-202055065A-0-0-00)。

摘　　要：为解决直流开关设备成本较高的问题,提出一种经济型直流负荷开关的技术方案。结合所提出的技术方案,研究电流基于电弧电压向电力电子器件自然转移与电流基于电力电子器件强制转移的技术原理;根据实际参数建立仿真模型,模拟了负荷电流及小电流的开断过程;针对原理样机进行开断试验,验证了所提技术方案的可行性。研究表明:所提技术方案可实现双向开断,无需辨别方向,3 ms内快速截断故障电流,且减少电力电子器件的使用数量,为经济型的直流开关研究提供一个新的思路。A technical scheme of the economical DC load switch is put forward to solve the problem of high-cost dc switchgear. According to the scheme, the paper first analyzes technical principles of spontaneous current transfer to power electronic devices based on arc voltage and the forced current transfer based on power electronic devices. Second, the simulation model is established on the basis of actual parameters to simulate the interruption process of load current and small current. Third, breaking tests for the prototype are carried out to verify the feasibility of this scheme. The results show that the scheme has capacity of bidirectional breaking with no need of direction identification. It can quickly cut off the fault current within 3 ms and reduce the number of power electronic devices, which offers a new idea to study the economical DC switch.

关 键 词：直流负荷开关 电流转移 电弧电压 重合闸 直流配电网 

分 类 号：TM564.2[电气工程—电器]