中国电力 ›› 2019, Vol. 52 ›› Issue (5): 76-82.DOI: 10.11930/j.issn.1004-9649.201810022

• 电网 • 上一篇    下一篇

适用于逆变型电源接入的配电网故障方向判别元件

朱逸凡1, 赵宏程2, 陈争光3, 徐辰婧4, 孙晓佳2, 张俊杰2, 吴慧2, 王兴国3, 王文焕3, 郑涛1   

  1. 1. 新能源电力系统国家重点实验室(华北电力大学), 北京 102206;
    2. 国网西藏电力有限公司电力科学研究院, 西藏 拉萨 850000;
    3. 中国电力科学研究院有限公司 电网安全与节能国家重点实验室, 北京 100192;
    4. 国网浙江省电力有限公司经济技术研究院, 浙江 杭州 310008
  • 收稿日期:2018-10-11 修回日期:2019-02-12 出版日期:2019-05-05 发布日期:2019-05-14
  • 作者简介:朱逸凡(1996-),男,通信作者,硕士研究生,从事新能源电力系统保护与控制研究,E-mail:18810525519@163.com;赵宏程(1986-),男,硕士,工程师,从事电力系统继电保护研究,E-mail:532579174@qq.com;陈争光(1988-),男,硕士,工程师,从事电力系统继电保护研究,E-mail:chenzhengguang@epri.sgcc.com.cn;徐辰婧(1988-),女,工程师,从事电力系统及其自动化研究,E-mail:148250338@qq.com;孙晓佳(1989-),女,助理工程师,从事变电智能化研究,E-mail:sunxiaojiadhr@163.com;张俊杰(1987-),男,工程师,从事电力系统继电保护研究,E-mail:348993937@qq.com;吴慧(1994-),女,助理工程师,从事二次设备评价研究,E-mail:2206372066@qq.com;王兴国(1981-)男,博士,工程师,从事电力系统继电保护研究,E-mail:wangxingguo@epri.sgcc.com.cn;王文焕(1984-),男,硕士,工程师,从事电力系统继电保护研究,E-mail:wangwh@epri.sgcc.com.cn;郑涛(1975-),男,博士,教授,从事新能源电力系统保护与控制研究,E-mail:zhengtao_sf@126.com
  • 基金资助:
    国家重点研发计划资助项目(2016YFB0900600)。

Fault Direction Discriminating Element Used for the Distribution Network with ⅡG Integration

ZHU Yifan1, ZHAO Hongcheng2, CHEN Zhengguang3, XU Chenjing4, SUN Xiaojia2, ZHANG Junjie2, WU Hui2, WANG Xingguo3, WANG Wenhuan3, ZHENG Tao1   

  1. 1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China;
    2. State Grid Tibet Power Co., Ltd. Electric Power Research Institute, Lhasa 850000, China;
    3. State Key Laboratory of Power Grid Safety and Energy Conservation, China Electric Power Research Institute Co., Ltd., Beijing 100192, China;
    4. State Grid Zhejiang Electric Power Co., Ltd. Economic Technology Research Institute, Hangzhou 310008, China
  • Received:2018-10-11 Revised:2019-02-12 Online:2019-05-05 Published:2019-05-14
  • Supported by:
    This work is supported by National Key R & D Program of China (No.2016YFB0900600).

摘要: 分布式电源接入配电网使得传统的单电源辐射状网络变成部分线路多电源供电的复杂网络,仅依靠阶段式电流保护已不再适用,因此急需对配电网原有保护进行改造。而由于分布式电源的结构特征与控制方法不同于传统发电机,传统方向元件的灵敏性大大降低甚至存在误判的可能性。以逆变型电源接入配电网为例,提出一种新的方向判别元件。通过限制逆变型电源接入位置实现短路电流性质区分;设置电流整定值,将各保护进行分类并采用不同的方向判别逻辑,仅根据短路电流与整定值之间的大小关系,便能准确区分正、反方向故障。

关键词: 继电保护, 逆变型电源, 接入位置, 短路电流, 方向判别元件

Abstract: The access of DG (distributed generation) to distribution network makes the traditional radiant network with single generation become a complex network with multiple generations, which makes the phased current protection no longer suitable. Thus, it is urgent to renovate the original protections of distribution networks. However, due to the difference between DGs and traditional generators in structure and control method, the sensitivity of traditional directional components significantly decreases, which makes misjudgment even possible. In this paper, an adaptive direction discriminating element is proposed by taking the distribution network with ⅡG (inverter-interfaced generation) as an example. Firstly, the characteristics of short-circuit currents are distinguished by restricting the access position of ⅡG. Then, by setting the current setting value, the relay protections at different locations are classified and equipped with different logics of determining the direction of fault. Finally, according to the relationship between the short-circuit current and the setting value, the faults of positive and reverse directions can be distinguished.

Key words: relay protection, inverter-interfaced generation (ⅡG), access position, short circuit current, direction discriminating element

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