Steady short-circuit calculation model for a photovoltaic station considering different generation units' fault characteristics

被引：0

作者：

Han W. ^{[1
]}

Liu S. ^{[2
]}

Xiao C. ^{[1
]}

Liu Y. ^{[1
]}

Song C. ^{[1
]}

Wang Z. ^{[2
]}

机构：

[1] Electric Power Research Institute, State Grid Henan Electric Power Company, Zhengzhou

[2] School of Technology, Beijing Forestry University, Beijing

来源：

Liu, Sumei (smliu@bjfu.edu.cn) | 1600年 / Power System Protection and Control Press卷 / 49期

关键词：

Fault analysis; Fault characteristics difference; Fault current calculation; Photo-voltaic station; Setting calculation;

D O I：

10.19783/j.cnki.pspc.210095

中图分类号：

学科分类号：

摘要：

With the increasing penetration of PV stations, the connected grid's fault characteristics are fundamentally changed. As a result, the equivalent model (both voltage source and reactance that are connected in series) of traditional generators cannot be applied for calculating the protection settings of a power grid with large-scale PV stations. It is of great significance to build the fault current calculation model of PV stations based on their fault characteristics. In this paper, the difference algorithms of different generation units' fault characteristics are revealed in the PV stations. The main factors influencing the fault current contribution difference of the generation units are explored. A clustering method is proposed on the basis of the difference algorithms of the generation units' transient control modes. Further, a unified model for calculating the current contribution from a PV station is deduced under symmetrical and asymmetrical faults. Finally, using practical PV stations' operating data, both theoretical analysis calculation results and PSCAD/EMTDC electromagnetic transient simulation results are compared and analyzed. These results verify the correctness of the proposed fault current calculation model. The research will provide support for studying the protection setting calculation of power grid with PV station. © 2021 Power System Protection and Control Press.

引用

页码：129 / 135

页数：6

共 23 条

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