含新能源接入的配电网网络化保护原理研究  

Research on a Principle of Networked Protection in Distribution Network with Renewable Energy Sources

作　　者：肖繁 夏勇军 张侃君 张哲[2] 尹项根[2] Xiao Fan;Xia Yongjun;Zhang Kanjun;Zhang Zhe;Yin Xianggen(State Grid Hubei Electric Power Research Institute,Wuhan 430077,China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]国网湖北省电力有限公司电力科学研究院,武汉430077 [2]强电磁与新技术国家重点实验室(华中科技大学),武汉430074

出　　处：《电工技术学报》2019年第S02期709-719,共11页Transactions of China Electrotechnical Society

基　　金：国家重点研发计划资助项目(2016YFB0900600)

摘　　要：新能源电源并入电网后,将根本性地改变传统单电源辐射型配电系统的网络结构,同时,新能源电源复杂的故障特性和随机性、间歇性的特殊运行特征,将使得传统配电网的保护原理、整定计算方法等难以满足电网安全运行要求。针对此,该文首先分析了新能源机组接入对配电网电流保护的影响。在此基础上,充分考虑各类新能源电源的故障特征,基于区域信息建立正向、反向和防孤岛反向故障跳闸矩阵,特别是对“根母线”故障、联络线故障和双馈风电机组撬棒保护投入等问题提出了解决方案,使得所提出的网络化保护方案可适用于各类新能源接入配电网情况。最后,通过仿真算例,验证了所提出原理的正确性。With the new energy sources are connected to the distribution system,the network structure of the traditional radiation distribution system with single source has been fundamentally changed.In addition,the complicated fault current characteristics and diversified power generation mode of the new energy sources brings many new problems and challenges to the traditional relaying protection and setting calculation on the distribution system.In this paper,the influence of the new energy sources for the current protection of the distribution network is analyzed.Based on this,the forward,reverse and isolated island reverse fault trip matrix are established based on regional information.The influence of“bus”fault,fault of line and DFIG crowbar protection are also considered.Then,the new principle of networked protection in the distribution system with new energy sources is proposed.Finally,simulation examples verify the theoretical analysis results.

关 键 词：配电网 新能源电源 电流保护 区域信息 网络化保护 

分 类 号：TM771[电气工程—电力系统及自动化]