Distribution Network Fault Location Based on μPMU Information

被引：0
|
作者：
Wang X. [1 ]
Ren X. [1 ]
He J. [1 ]
Wang Z. [1 ]
Zhang Y. [1 ]
Shi Z. [2 ]
Chen D. [3 ]
机构：
[1] School of Electrical Engineering, Beijing Jiaotong University, Haidian District, Beijing
[2] State Grid Shanghai Municipal Electric Power Company, PudongNew District, Shanghai
[3] State Grid Shanghai Pudong Electric Power Supply Company, Pudong District, Shanghai
来源：
Dianwang Jishu/Power System Technology | 2019年 / 43卷 / 03期
关键词：
Distribution system; Fault location; Interior point method; Online parameter; Phasor information; ΜPMU;
D O I：
10.13335/j.1000-3673.pst.2018.2963
中图分类号：
学科分类号：
摘要：
Inaccurate distribution network parameters is one of the main reasons affecting fault location accuracy of distribution network. At the same time, severe asymmetry of actual distribution line also affects fault location accuracy to a certain extent. Most traditional distribution network impedance fault location methods use voltage and current amplitude information. Its accuracy is limited by transformer and site conditions, and is difficult to improve. With application of micro phasor measurement unit (μPMU) in distribution network, it provides conditions for distribution network fault location based on online parameter identification. This paper presents a distribution line fault location method based on μPMU phasor information. Firstly, the location error caused by distribution line parameter imbalance and theoretical line parameter inaccuracy are analyzed through quantified method. The concentrated parameter model based on phase components is considered. Secondly, combined with the high-accuracy operational data measured with μPMU, real-time line parameters are used to form constraints. The voltage phasor characteristics of the fault point are exploited, taking the minimum value of amplitude difference as objective function and angle equality as a constraint. The internal point method is used to obtain the real-time line parameters and fault distance simultaneously. Finally, a simulation model is built in PSCAD, giving the results of improved location accuracy. © 2019, Power System Technology Press. All right reserved.
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页码：810 / 817
页数：7
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