电力系统自动化2017，Vol.41Issue(12)：168-172,187,6.DOI:10.7500/AEPS20160922004
基于全控型电力电子器件的强制换流型混合直流断路器
Hybrid DC Circuit Breaker with Forced Current Commutation Based on Full-controllable Power Electronic Devices
摘要
Abstract
In the forced current commutation hybrid direct current (DC) circuit breaker based on full-controllable power electronic devices, the snubber capacitor discharge will affect the mechanical switch opening time in the process of auxiliary commutation circuit opening.When the action of the main circuit breaker is finished, the release of line energy just relies on the lightning arrester making the device damage-prone and affecting its useful life.The arrester investment cost is high and the time of energy dissipating is long.A forced current commutation hybrid DC circuit breaker is proposed, and its operating principle is analyzed.Finally, the feasibility of this scheme is verified by comparing with typical hybrid DC circuit breakers.Compared with the traditional forced current commutation hybrid DC circuit breaker based on full-controllable power electronic devices, the proposed scheme realizes the current bidirectional flow with only half the full-controllable power electronics devices.It can block the snubber capacitor discharging road without affecting the mechanical switch opening time, and reduce the line current to zero as soon as possible with a grounding diode circuit.关键词
强制换流/混合直流断路器/拓扑结构/仿真分析Key words
forced current commutation/hybrid direct current circuit breaker/topological structure/simulation analysis引用本文复制引用
于海,迟颂,李尔平..基于全控型电力电子器件的强制换流型混合直流断路器[J].电力系统自动化,2017,41(12):168-172,187,6.基金项目
国家重点基础研究发展计划(973计划)资助项目(2015CB25100).This work is supported by National Basic Research Program of China (973 Program) (No.2015CB25100). （973计划）
