A Current Selective Tripping Protection Scheme for the Distribution Network with PV

Yabo Liang, Lei Li, Jianan He, Jian Niu, Haitao Liu, Chao Li and Borui Li ()
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Yabo Liang: Electric Power Research Institute, State Grid Ningxia Electric Power Co., Ltd., Yinchuan 750011, China
Lei Li: Electric Power Research Institute, State Grid Ningxia Electric Power Co., Ltd., Yinchuan 750011, China
Jianan He: Electric Power Research Institute, State Grid Ningxia Electric Power Co., Ltd., Yinchuan 750011, China
Jian Niu: Electric Power Research Institute, State Grid Ningxia Electric Power Co., Ltd., Yinchuan 750011, China
Haitao Liu: Electric Power Research Institute, State Grid Ningxia Electric Power Co., Ltd., Yinchuan 750011, China
Chao Li: Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China
Borui Li: Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China

Sustainability, 2023, vol. 15, issue 17, 1-18

Abstract: At present, the global energy demand keeps rising due to population growth. Therefore, large numbers of photovoltaics (PV) are being integrated with power systems. Solar PV’s installed power capacity is poised to surpass that of coal by 2027, becoming the largest in the world. The integration of PV has changed the direction of the power flow. Under these circumstances, the changed magnitudes and directions of fault current may result in maloperations and non-operations of conventional relays. In this work, a simple and reliable current selective tripping protection scheme is proposed, which is based on the direct communication between overcurrent protective devices on both sides of the line. Through logical programming of the operation information of each protection, the fault location is detected, and the instantaneous trip is realized. The simulation analysis of PSCAD/EMTDC shows that the protection scheme can reliably detect and isolate faults happening at the feeder and bus under different fault conditions; besides, it has good performance in detecting certain resistance grounding faults. The proposed protection scheme can effectively solve the problems caused by PV systems penetration and improve system safety.

Keywords: current selective tripping protection; distribution network; photovoltaic system; overcurrent protective devices (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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