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Research on Fault Location Method Based on Nonlinear Impedance Model

Ruiying Liu1, Zhongjian Kang1, and Yanyan Feng2
1. College of Information and Control Engineering, China University of Petroleum, Qingdao 266580, China
2. Zaozhuang Power Supply Bureau, Zaozhuang 277000, China
Abstract—In modeling and location analysis, most traditional fault location methods do not consider about the existence of practical nonlinear model in distribution network, such as the nonlinearity of load and grounding resistor. Hence, the adopted model can’t express the practical network, and the location results will lose practical meaning. Aiming at solving the question above, this paper proposes a fault area location method for distribution network with Distributed Generation (DG) which takes account of the nonlinearity; the load adopts quadric
polynomial model; the grounding resistor adopts the experience formula model; the nonlinear equation constructed by nodal voltage equation will be solved out through quasi-newton algorithm, then the fault area can be located according to the definition of fault feature value. The simulation results in 10 kV distribution network model of the SINPOPEC West-Northern oil field suggest the validity of the proposed fault location method.

Index Terms—Distributed Generation (DG), fault area location, nonlinear model, quasi-newton algorithm

Cite: Ruiying Liu, Zhongjian Kang, and Yanyan Feng, “Research on Fault Location Method Based on Nonlinear Impedance Model," Journal of Communications, vol. 10, no. 11, pp. 903-909, 2015. Doi: 10.12720/jcm.10.11.903-909
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