摘要
变电站直流系统中增加隔离型DC/DC模块具有减小接地故障影响范围等优点,但模块自身也存在故障失效问题。首先对两类典型DC/DC模块配置方案进行了对比分析;在此基础上,考虑各类直流负荷停电影响因素,建立了基于隔离分区的直流负荷停电频率模型与停电时间模型;并以主分屏两级供电直流系统为例,研究了不同DC/DC模块配置对直流系统可靠性的影响,旨在通过可靠性指标的定量计算为DC/DC模块的优化配置提供参考。
Installing the DC/DC module in the substation DC system could reducing the affected area of ground fault, but the module also had the risk of failure. First, two typical DC/DC module configurations were compared, and then the interruption frequency and duration models based on isolation area division were build, considering all kinds of impact factors on DC load outage. Taking main distribution cabinet DC system for example, the effects of DC/DC module configurations on DC system reliability were evaluated and compared. In the aspect of quantitative analysis of reliability indices, a theoretical reference was provided to the DC/DC module configuration.
作者
王鑫杰
杨涛
徐习东
WANG Xin-jie;YANG Tao;XU Xi-dong(Zhejiang University, Hangzhou Zhejiang 310027, China;Electric Power Research Institute, Zhejiang Electric Power Corporation, Hangzhou Zhejiang 310014, China)
出处
《电源技术》
CAS
北大核心
2019年第4期666-668,723,共4页
Chinese Journal of Power Sources
基金
国网浙江省电力公司科技项目(5211DS15002L)
关键词
直流系统
直流变换器
可靠性
停电频率
停电时间
配置
DC system
DC/DC module
reliability
interruption frequency
interruption duration
configuration
