Fault current characteristics in active distribution networks with integrations of multiple PVs

Wang, P. Y.; Liang, Fangyu; Song, Jinyuan; Guo, Lucun; Zhang, J. F.; Xie, Yunyun; Wang, S. Z.

doi:10.1109/apap47170.2019.9225157

Cited by 4 publications

(1 citation statement)

References 8 publications

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“…Distributed PV systems can affect fault currents and fault levels in the DNs. Generally, PV systems exhibit limited fault current due to their relatively small size compared to conventional generation sources [11,12]. PV systems bring great challenges to the coordination and operation of relay protection schemes.…”

Section: Introductionmentioning

confidence: 99%

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

Liang,

Li,

et al. 2023

Sustainability

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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.

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Section: Introductionmentioning

confidence: 99%