Research on Impact of Distributed Photovoltaic on Distribution Network Based on RTDS Modeling

doi:10.3969/j.issn.1008-0198.2022.01.018

Abstract

Abstract: With the large-scale promotion of distributed photovoltaic, it is necessary to study the impact of distributed photovoltaic access to distribution network on voltage, current and relay protection. Firstly, according to the typical structure of distributed photovoltaic and distribution network, the simulation model of distributed photovoltaic access to distribution network is established based on RTDS. Secondly, the influence of distributed photovoltaic on distribution network voltage and current under different photovoltaic permeability, fault type and fault location is simulated and analyzed. Then, the influence of distributed photovoltaic on distribution network relay protection under power grid fault state is studied. The simulation results show that after the distributed photovoltaic is connected to the distribution network, the voltage increases and the current provided by the system decreases. When the distributed photovoltaic permeability is large, the overcurrent protection may refuse to operate and the reclosing may fail. Therefore, the protection setting needs to be reset.

Key words: distributed photovoltaic, distribution network, RTDS, relay protection

CLC Number:

TM714

LONG Xuemei, YAN Yabing, DING Yu, OUYANG Zongshuai, HE Silin. Research on Impact of Distributed Photovoltaic on Distribution Network Based on RTDS Modeling[J]. Hunan Electric Power, 2022, 42(1): 94-99.

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