低压直流配电网继电保护研究与实践  

Research and Practice on Relay Protection in Low Voltage DC Distribution Network

作　　者：李忠 余学文 吴鸣[2] 陈文波 刘向东 仝浩 李永恒 LI Zhong;YU Xuewen;WU Ming;CHEN Wenbo;LIU Xiangdong;TONG Hao;LI Yongheng(Nanjing Guochen DC Distribution Tech.Co.,Ltd.,Nanjing 211100,China;China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]南京国臣直流配电科技有限公司,江苏南京211100 [2]中国电力科学研究院,北京100192

出　　处：《供用电》2018年第8期40-44,60,共6页Distribution & Utilization

摘　　要：随着分布式能源的快速发展以及电力负荷的结构变化,电源、负荷及储能等设备的直流属性日益突出,低压直流配电网正成为配电网的研究重点。低压直流继电保护被认为是直流配电网发展的"最后一千米",一直制约着工程实践和技术推广。通过研究低压直流配电网的拓扑结构和关键设备,分析其故障类型及其电气特征,进而提出数字式低压直流保护的设计原则和硬件构成,结合实际案例给出了工程配置方案,并进行了实际测试,结果表明能够达到预期。With the rapid development of distributed energy and the structural change of power load,the DC properties of power,load and energy storage equipment are becoming more and more prominent,and low voltage DC distribution network is becoming the research focus of distribution network.The low voltage DC relay protection is considered as the“last mile”of the development of DC distribution network,which has always restricted engineering practice and technology extension.Through studying of the topology and key equipments of the low voltage DC distribution network,the fault types and their electrical characteristics are analyzed,and the design principles and hardware compositions of digital low-voltage DC protection are put forward.The project configuration scheme is given in combination with the actual case,and the actual test results are also given.

关 键 词：数字式保护 低压直流 配电网 分布式发电 故障类型 

分 类 号：TM77[电气工程—电力系统及自动化]