Novel Fault Location Algorithm for EHV Transmission Line With Shunt Reactor
-
摘要: 构造一测距方程, 该测距方程的根能真实反映故障点与并联电抗器安装点之间的位置关系。当故障位置位于并联电抗器安装点右侧时, 此时测距方程的根真实反映实际故障位置;当故障位置位于并联电抗器安装点左侧时, 测距方程的根小于故障点与线路右端之间的距离但大于线路右端与并联电抗器安装点之间的距离, 且通过分析得出该测距方程根是唯一存在。因此, 通过测距方程左右两边等式相减后取范数所构造出的测距函数将在测距方程的根处呈现最小值。进而提出了适用于中间带并联电抗器超高压线路的故障测距算法。EMTDC仿真验证了超高压带并联电抗器线路故障测距算法的正确性和有效性。Abstract: A new fault location equation is generated. The solution of the generated fault location equation is verified by mathematics. The position relation between fault position and shunt reactor allocation position is identified by the solution of the fault location equation. When the fault position lies on the right of the shunt reactor allocation position, solution of the fault location equation is the real fault distance. When fault position lies on the left of the shunt reactor allocation position, solution of the fault location equation is less than the distance from the right line terminal to the fault position, and more than the distance from the right line terminal to the shunt reactor allocation position. Based on the characteristics of solution for the fault equation, a new fault location algorithm for EHV transmission line with shunt reactor is proposed. The left equality and the right equality of the fault location equation are computed. The norm value of the left equality subtracted by the right equality is computed and the minimum point is searched. The real fault position is searched by analyzing the minimum point based on the characteristics of solution for the fault equation.Results of EMTDC based simulation prove that the proposed algorithm is correct and efficient.
-
-
葛耀中.新型继电保护与故障测距原理与技术[M].西安:西安交通大学出版社, 1996.[2] 全玉生, 王晓蓉, 杨敏中, 等.工频双端故障测距算法的鲁棒性问题和新算法研究[J].电力系统自动化, 2000, 24(10): 2832.[3] 辛振涛, 尚德基, 尹项根.一种双端测距算法的伪根问题与改进[J].继电器, 2005, 33(6): 3638, 45.[4] 刘乾业.并联电抗器在电力系统中的应用[J].电工技术杂志, 1994, 6(6): 3032.[5] 李斌, 李永丽, 盛鹍, 等.带并联电抗器的超高压输电线单相自适应重合闸的研究[J].中国电机工程学报, 2004, 24(5): 5256.[6] Xu Z Y, Du Z Q, Ran L, et al.A current differential relay for a 1000kV UHV transmission line[J].IEEE Transactions on Power Delivery, 2007, 22(3): 13921399.
计量
- 文章访问数: 1094
- HTML全文浏览量: 12
- PDF下载量: 521
下载:
