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Vol. 162, Issue 1, January 2014, pp. 152-160

 

Bullet

 

Research on Fault Location in Distributed Network with DG Based on Complex Correlation Thevenin Equivalent and Strong Tracking Filter
 

Yanyan FENG, Zhongjian KANG

College of Information and Control Engineering, China University of Petroleum, Qingdao 266580, China
Tel.: 18366262738, fax: 0532-86983450

E-mail: fengyy0116@yeah.net, kangzjzh@163.com

 

Received: 22 October 2013 /Accepted: 9 January 2014 /Published: 31 January 2014

Digital Sensors and Sensor Sysstems

 

Abstract: With the introduction of distributed generators (DG), the traditional distribution system characterized by radical network becomes a multi-source one. Therefore the accuracy of the equivalent model of distributed generators directly affects the precision of fault location. To solve this problem, this paper proposed a fault location method based on complex correlation Thevenin equivalent and strong tracking filter (STF) in distribution network with DG. Strong tracking filter (STF) can be used for real-time extraction of fundamental wave phase and amplitude of single phase voltage and current, and fast track the power parameters mutation. The method of complex correlation Thevenin equivalent takes into account the randomness of measurement data, DG impedance and load to overcome measurement error caused by the uncertainty of the data, so that the construction of the DG impedance model is more accurate. Simulation results show that the method of fault location proposed in this paper has advantages of high accuracy and strong robustness.

 

Keywords: Distributed generator (DG), Complex correlation Thevenin equivalent, Strong tracking filter (STF), Fault location, Impedance model.

 

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