首页 | 本学科首页   官方微博 | 高级检索  
     

面向多能互补微网的故障辨识与继电保护算法
引用本文:丁保迪,季宇,王永刚,苏剑,魏大钧,陈继开.面向多能互补微网的故障辨识与继电保护算法[J].电力建设,2020,41(4):10-21.
作者姓名:丁保迪  季宇  王永刚  苏剑  魏大钧  陈继开
作者单位:1.南瑞集团有限公司(国网电力科学研究院有限公司),南京市 211106;2.国电南瑞南京控制系统有限公司,南京市 211106;3.国电南瑞科技股份有限公司,南京市 211106;4.东南大学电气工程学院,南京市 210096
基金项目:国家电网公司总部科技项目“基于多能互补的微网规划与运行控制技术研究及应用”(52060018000N);2019年度山东省重点研发计划项目(2019JZZY010903 )
摘    要:由于含有多种具有互补特性的分布式电源,多能互补微电网在能源综合利用、供电可靠性和运行经济性方面具有明显的优势。然而与传统配电网相比,各类分布式电源的并入导致微电网拓扑结构和运行方式变得更为复杂,并网和离网运行对应的故障特性存在差异,使得传统继电保护方案难以满足此类微电网保护的要求。针对这一问题,首先围绕传统继电保方案的不足展开讨论,分析微电网网内故障特点,继而提出一种适用于微电网的改进故障辨识算法,以实现对网内故障的快速准确辨识。综合考虑多能互补微网继电保护的需求,结合改进故障辨识算法,将改进电流差动保护与广域自适应电流速断保护相结合,提出一种适用于微电网分布式电源上下游线路的综合继电保护算法,在缩小故障影响范围的基础上,提高保护响应速度并降低保护拒动的概率。最后,利用RT-LAB实时仿真系统构建含风、光、储、微型燃气轮机等分布式电源在内的多能互补微网模型,通过网内模拟不同类型故障,验证了所提故障辨识和继电保算法的有效性。

关 键 词:微电网  继电保护  电流差动保护  电流速断保护  故障辨识

Fault Identification Method and Relay Protection Algorithm for Multi-Energy Complementary Microgrid
DING Baodi,JI Yu,WANG Yonggang,SU Jian,WEI Dajun,CHEN Jikai.Fault Identification Method and Relay Protection Algorithm for Multi-Energy Complementary Microgrid[J].Electric Power Construction,2020,41(4):10-21.
Authors:DING Baodi  JI Yu  WANG Yonggang  SU Jian  WEI Dajun  CHEN Jikai
Affiliation:1. NARI Group Corporation(State Grid Electric Power Research Institute), Nanjing 211106, China; 2. NARI Nanjing Control System Co., Ltd., Nanjing 211106, China; 3. NARI Technology Co., Ltd., Nanjing 211106, China; 4. School of Electrical Engineering, Southeast University, Nanjing 210096, Chin
Abstract:Multi-energy complementary microgrid has obvious advantages in energy comprehensive utilization, power supply reliability and operational economy due to the multiple complementary power sources connected to the grid. However, compared with conventional distribution network, the incorporation of various types of distributed power sources has made the microgrid topology and operation mode more complicated, and there are some differences in fault characteristics corresponding to grid-connected/islanded operation. Conventional relay protection scheme is difficult to meet the protection requirements of microgrid. Aiming at this problem, this paper firstly discusses the shortcomings of conventional relay protection schemes, analyzes the fault characteristics in microgrid, and proposes an improved fault identification algorithm to achieve fast and accurate fault identification in microgrid. Considering the requirements of relay protection of microgrid, combined with improved fault identification algorithm, an integrated relay protection algorithm is proposed on the basis of an improved current differential protection and adaptive current quick-break protection on the feeder upstream and downstream. The relay protection algorithm not only reduces the scope of fault, but also improves the protection response speed and reduces the probability of protection rejection. Finally, in the RT-LAB real-time simulation system, a multi-energy complementary microgrid model including distributed power sources such as wind turbine, photovoltaic panel, energy storage battery, and micro gas turbine is established, and the simulations are conducted under different fault conditions. The simulation results verify the correctness and effectiveness of the proposed relay protection algorithm.
Keywords:microgrid  relay protection  current differential protection  current quick break protection  fault identification  
本文献已被 CNKI 维普 等数据库收录!
点击此处可从《电力建设》浏览原始摘要信息
点击此处可从《电力建设》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号