基于故障可观性的输电线路故障定位方法

姜臻; 苗世洪; 刘 沛

引用本文:	姜臻,苗世洪,刘沛.基于故障可观性的输电线路故障定位方法[J].电力系统保护与控制,2016,44(15):1-9.
	JIANG Zhen,MIAO Shihong,LIU Pei.Fault observability model based fault location technique for transmission grids[J].Power System Protection and Control,2016,44(15):1-9

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基于故障可观性的输电线路故障定位方法
姜臻¹,苗世洪²,刘沛²
(1.广东电网有限责任公司珠海供电局，广东珠海 519000; 2..强电磁工程与新技术国家重点实验室，华中科技大学，湖北武汉 430074)

摘要:

广泛研究的基于WAMS的故障定位算法都基于理想化的量测条件，这使得它们在实际应用中受到限制。为了使电网在信息不全条件下(如极端气候、通信故障等)提供可靠的故障定位方案，提出了一种基于故障可观性的输电线路故障定位方法。该方法采用分布参数输电线路模型，可以更准确地考虑分布电容电流对故障定位精度的影响；算法性能优异，且不受故障初始相位角、负荷及故障路径阻抗的影响；仅需要相量测量单元(PMU)的暂态数据信号，无需系统阻抗等其他信息；算法没有迭代过程，计算速度快。诸多仿真分析验证了该方法的有效性和鲁棒性。

关键词: 故障定位故障可观性模型分布参数信息不全条件故障路径阻抗

DOI：10.7667/PSPC151528

分类号:

基金项目:国家自然科学基金项目(51377068)

Fault observability model based fault location technique for transmission grids

JIANG Zhen¹,MIAO Shihong²,LIU Pei²

(1. Zhuhai Power Supply Bureau, Guangdong Power Grid Limited Liability Corporation, Zhuhai 519000, China;
;2. State Key Laboratory of Advanced Electromagnetic Engineering and Technology
(Huazhong University of Science and Technology), Wuhan 430074, China)

Abstract:

Extensive studies on WAMS based fault location technique are based on the idealized conditions of the measurement, so that they are limited in the actual applications in electric power system. In order to make the power grid to be provided reliable fault location technique on incomplete information conditions such as extreme weather, communication failures, etc., an effective fault location technique for transmission grids based on fault observability model is presented. High accuracy in fault location is achieved by using an accurate distributed parameter line model for the transmission lines. The performed work is provided with high performance which is featuring robustness to the uncertainties in fault inception angle, load current and fault path resistance. The transient fault data is obtained from PMUs in the proposed technique, and it does not require any information of the source impedance. This novel fault location technique does not need to be solved in an iterative manner and the calculation is fast. The validity and robustness of the proposed algorithm is evaluated by many simulations. This work is supported by National Natural Science Foundation of China (No. 51377068).

Key words: fault location fault observability model distributed parameters incomplete information conditions fault path resistance

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