Series LC DC circuit breaker

作     者：Dragan Jovcic 

作者机构：School of EngineeringUniversity of AberdeenAB243UEAberdeenUK 

出 版 物：《High Voltage》 (高电压（英文）)

年 卷 期：2019年第4卷第2期

页      面：130-137页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 

基　　金：the European Union's Horizon 2020 research and innovation program under grant No.691714 

主　　题：fault enable simplicity 

摘      要：The article proposes a mechanical DC circuit breaker(CB)based on a series LC *** requires two switches(a fast disconnector and an AC circuit breaker),an inductor and a capacitor,and therefore the cost is expected to be low.A series LC circuit is analysed and it is concluded that fault current will always have natural zero-current crossings which enable use of simple AC *** current commutation into a capacitor is investigated since this is important for successful operation.A number of analytical conditions are derived for the voltage stress across disconnector contacts which enable arc-less contact *** results on a 900 V laboratory prototype LC DC CB illustrate successful DC fault clearing,with commutation of 130 A and peak DC current of 190 A.A detailed PSCAD model for 320 kV LC DC CB is developed and DC fault clearing is evaluated in order to understand the possible benefit for high-voltage direct current *** comparisons with the commercialised hybrid DC CB and mechanical DC CB on 320 kV system illustrate some benefits in terms of performance and *** mechanical LC DC CB operates very fast because of early capacitor insertion,and this results in low peak current and energy dissipation.