未来多源农村配电网安全与防护技术研究与探讨  

Research and discussion on safety and protection technology of distribution network in rural areas in the future

作　　者：黄利军[1] 翟登辉[1] 李瑞生[1] 任志航 王鹏[1] HUANG Lijun;ZHAI Denghui;LI Ruisheng;REN Zhihang;WANG Peng(XJ Group Corporation,Xuchang 461000,China)

机构地区：[1]许继集团有限公司,河南许昌461000

出　　处：《电力系统保护与控制》2019年第2期167-174,共8页Power System Protection and Control

基　　金：国家电网科技项目资助(SGTYHT/16-JS-198)"基于大数据与云架构的配电主站关键技术研究与应用"~~

摘　　要：未来含大量分布式电源(DistributedResources,DR)的农村配电网改变了传统配电网潮流单向特征,考虑了DR及多元化负荷的接入,由原来的"网-荷"双元结构变为"源-网-荷"三元新格局。分析了多源接入对农村配电网的系统可靠性、继电保护、开关设备、谐波、电压分布、三相不平衡、潮流分布与网损、系统运行人身和计量安全方面的影响。DR与配电网之间的交互特征主要体现在:DR如何通过电力电子设备安全灵活接入配电网、配电网如何有效应对大量DR的高占比接入。重点从DR接入农村配电网的主要形式、即插即用安全接入技术、配电网保护控制技术以及DR最佳选址定容安全设计技术方面进行了研究分析。Future rural distribution network containing large numbers of Distributed Resources(DR)will change the unidirectional power flow characteristics of traditional power grid,and its control strategy should be changed from'grid-load'control to'source-grid-load'coordinated control with the integration of DR and multiple loads taken into consideration.In this paper,the impact of multi-source integration on rural distribution network including system reliability relay protection,swithgear,network harmonic,voltage profile,three-phase unbalance,power flow distribution,grid loss,system operation,personal and measurement security is analyzed.The interaction between DR and distribution network is mainly reflected in the following two aspects,one is how DR could access to distribution networks through power electronic devices safely and flexibly,and the other is how distributon networks deal with the access of DR with high capacity penetration effectively.For these issues,this paper conducts research and analysis focusing on DR plug and play safety integration technology,distribution networks protection and control technology,and DR optimal site-selection and fixed-capacity safety planning technology.

关 键 词：多源农村配电网 安全与防护 即插即用 配电网保护 DR选址定容 

分 类 号：TM727.1[电气工程—电力系统及自动化]