基于塑壳断路器保护功能和变换器故障穿越特性的建筑直流系统最简保护方案  

Simplest protection scheme of building DC system based on protection function of molded case circuit breaker and fault ride through characteristic of converter

作　　者：周余涵 李泽锴 柳洲 赵宇明 李艳 盛诗意 徐习东[2] ZHOU Yuhan;LI Zekai;LIU Zhou;ZHAO Yuming;LI Yan;SHENG Shiyi;XU Xidong(Shenzhen Power Supply Co.,Ltd.,National Energy Innovation Platform-Source-Grid-Load Interaction R&D Center,Guangdong Provincial Key Laboratory of Source-Grid-Load-Storage Interactive Collaborative Technology,Shenzhen 518000,China;Zhejiang University,Hangzhou 310027,China)

机构地区：[1]深圳供电局有限公司(国家能源新型电力系统源网荷双向互动研发中心、广东省源网荷储互动协同技术企业重点实验室),广东深圳518000 [2]浙江大学,浙江杭州310027

出　　处：《供用电》2025年第4期26-33,共8页Distribution & Utilization

基　　金：国家重点研发计划项目(2023YFC3807000)。

摘　　要：建筑直流配电系统广泛采用微机保护作为直流系统保护的组成部分以满足保护的可靠性和选择性要求,但微机保护造价昂贵、建设成本高。为解决现阶段直流系统保护存在的问题,提出基于塑壳断路器保护功能和变换器故障穿越特性的建筑直流系统最简保护方案。该方案根据故障支路和非故障支路的短路电流特性差异,通过塑壳断路器各保护段动作特性和变换器的故障穿越时间及闭锁特性,进行综合判断以识别故障位置。仿真结果表明,所提出的最简保护方案可靠性高,选择性强,无需采用微机保护,易于工程实现。Microcomputer protection is widely used as a component of DC system protection in building DC power distribution system to meet the reliability and selectivity requirements of protection,but microcomputer protection is expensive and the construction cost is high.In order to solve the existing problems of DC system protection at the present stage,a simplified protection scheme for building DC system based on the protection function of molded case circuit breaker and the fault ride-through characteristics of converter was proposed.According to the difference in the short-circuit current characteristics of the faulty branch and the non-faulty branch,the comprehensive judgment is made to identify the fault location through the action characteristics of each protection section of the molded case circuit breaker and the fault ride-through time and blocking characteristics of the converter.The simulation results show that the proposed minimum protection scheme has high reliability,strong selectivity,without need for microcomputer protection,which is fit for to engineering implementation under building DC power distribution system.

关 键 词：建筑直流配电系统 塑壳断路器 故障穿越 短路电流特性 最简保护 

分 类 号：TM72[电气工程—电力系统及自动化]