摘要
随着充电设施、5G基站、直流家电等新型直流负荷及光伏等直流电源的快速发展,研究兼具安全、可靠、高效特性的直流配电网具有巨大的市场潜力和应用价值。提出了中压直流配电网网架结构及低压直流用电系统母线结构,分析了单极接线、双极接线的特点及其适用情况,提出了由两电平换流器、MMC换流器构成的伪、真双极直流配用电系统的接地方式。最后,以数据中心、居民楼宇等直流负荷集中区应用场景为例,从电压等级、网架结构、接线方式和接地方式等方面构建其典型供用电模式。
With the rapid development of charging facilities,5G base station,DC household appliances and other new DC loads and photovoltaic DC power supply,the research of DC distribution network with safety,reliability and efficiency has tremendous market potential and application value.This paper presents the grid structure of medium voltage DC distribution network and the bus structure of low voltage DC power system,analyzes the characteristics and application of single pole connection and bipolar connection,and puts forward the typical grounding mode of pseudo bipolar and true bipolar DC distribution system composed of two-level converter and MMC converter.Finally,the typical application scenarios of DC load concentration area were taken as an example to construct its typical power supply mode from voltage level,grid structure,wiring mode and grounding mode.
作者
韦涛
张伟
崔艳妍
刘伟
韩俊
蔡超
WEI Tao;ZHANG Wei;CUI Yanyan;LIU Wei;HAN Jun;CAI Chao(China Electric Power Research Institute Co.,Ltd.,Beijing 100192,China;State Grid Jiangsu Electric Power Co.,Ltd.,Economic and Technological Research Institute,Nanjing 210008,China)
出处
《供用电》
2020年第10期10-15,共6页
Distribution & Utilization
基金
国家电网有限公司总部科技项目“考虑源网荷协调的交直流配电系统发展模式研究”(5102-201956306A-0-0-00)。
关键词
直流配电
网架结构
接线方式
接地方式
典型供用电模式
DC distribution
grid structure
connection mode
grounding mode
typical power supply and consumption mode
