![确定光伏场站送出线故障点的线路保护范围的方法、系统](/CN/2019/1/104/images/201910521537.jpg)
基本信息:
- 专利标题: 确定光伏场站送出线故障点的线路保护范围的方法、系统
- 专利标题(英):Method and system for determining line protection range of photovoltaic field station outgoing line fault point
- 申请号:CN201910521537.5 申请日:2019-06-17
- 公开(公告)号:CN110544925A 公开(公告)日:2019-12-06
- 发明人: 措姆 , 王铭灏 , 陈争光 , 王兴国 , 郑涛 , 杜丁香 , 王书扬 , 曹虹 , 郭雅蓉 , 程琪 , 蔡文瑞 , 戴飞扬 , 王大飞 , 张俊杰 , 张波琦 , 赵宏程 , 阳成 , 顾琦 , 许江波 , 张志鹏 , 梅燕 , 赵文陶 , 陈占凤 , 尼玛片多 , 刘川平
- 申请人: 国网西藏电力有限公司电力科学研究院 , 中国电力科学研究院有限公司
- 申请人地址: 西藏自治区拉萨市色拉路17号
- 专利权人: 国网西藏电力有限公司电力科学研究院,中国电力科学研究院有限公司
- 当前专利权人: 国网西藏电力有限公司电力科学研究院,中国电力科学研究院有限公司
- 当前专利权人地址: 西藏自治区拉萨市色拉路17号
- 代理机构: 北京工信联合知识产权代理有限公司
- 代理人: 姜丽辉
- 主分类号: H02H7/26
- IPC分类号: H02H7/26
The invention discloses a method for determining a line protection range of a photovoltaic field station outgoing line fault point, including: S1, determining a measured impedance expression ZM of a photovoltaic field station power outlet; S2, setting a fault location coefficient threshold nmax, and a transition resistance threshold Rgmax; S3, obtaining a positive sequence voltage and positive sequence current fault value at the protective installation of the photovoltaic field station outgoing line, and the equivalent positive sequence impedance value of the photovoltaic field station exit and entrance; S4, according to the expression ZM, an expression Dd, the nmax, and the Rgmax, determining the operation boundary of a curved polygon; and S5, analyzing the distance protection of the photovoltaic field station outgoing line fault point according to the operation boundary of the curved polygon and a plane where the curved polygon is located. The method guarantees that when the photovoltaic outgoing line has a ground fault via a transient resistor, the fault in the area is operated instantaneously or after a delay, and the fault outside the area does not malfunction, and ensures thestable and reliable operation of the photovoltaic field station.
公开/授权文献:
- CN110544925B 确定光伏场站送出线故障点的线路保护范围的方法、系统 公开/授权日:2023-03-10
IPC结构图谱:
H | 电学 |
--H02 | 发电、变电或配电 |
----H02H | 紧急保护电路装置 |
------H02H7/00 | 当出现正常工作条件的不希望有的变化时能完成自动切换的,专用于特种电机或电设备的或专用于电缆或线路系统分段保护的紧急保护电路装置 |
--------H02H7/26 | .电缆或线路系统的分段保护,例如当发生短路、接地故障或电弧放电时切断一部分电路 |