摘要
针对低压直流配电网,本文利用电压源型换流器的自关断功能来代替直流断路器限流的作用,进行保护方案配置。本文主要聚焦故障中断和隔离,利用继电器检测本保护区域故障信息并把动作信号传输到换流器,换流器动作隔离故障。在PSCAD软件中搭建两端供电的直流配电模型进行仿真,结果表明,在采用继电器的情况下,采用过电流的保护方案可以满足快速响应的要求,为下一步直流配电系统保护方案的研究奠定了良好的基础。
In view of the low voltage dc power distribution network,this paper proposes a protection scheme by using the self turnoff function of the VSC instead of DC current- limiting circuit breakers. This paper focuses on fault interruption and isolation,uses relays to detect the quantities of the protected area and send action signals to the converter,then the converter isolates faults. Establishing a simple two- terminal DC power distribution system model in the PSCAD,it is shown that overcurrent- based schemes can be adopted for these relays to meet the fast response requirements,laying a good foundation for the next step research of Dc power distribution system protection scheme.
出处
《电测与仪表》
北大核心
2016年第12期36-41,共6页
Electrical Measurement & Instrumentation
关键词
直流配电
电压源型换流器
保护
过电流
DC distribution
voltage source converter
protection
overcurrent
