Adaptive Distance Protection for Transmission Line of Photovoltaic Station During Asymmetric Short Circuit

被引：0

作者：

Chao C. ^{[1
]}

Zheng X. ^{[1
]}

Gao P. ^{[1
]}

Tai N. ^{[1
]}

Jin S. ^{[1
]}

Tu Q. ^{[2
]}

Sun T. ^{[2
]}

Li W. ^{[2
]}

An Y. ^{[2
]}

机构：

[1] Key Laboratory of Control of Power Transmission and Conversion, Shanghai Jiao Tong University, Ministry of Education, Minhang District, Shanghai

[2] State Grid Shanghai Electric Power Company, Pudong New District, Shanghai

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2022年 / 42卷 / 18期

基金：

中国国家自然科学基金;

关键词：

additional impedance; distance protection; impedance transition resistance; negative sequence current suppression control strategy; photovoltaic station transmission line;

D O I：

10.13334/j.0258-8013.pcsee.211044

中图分类号：

学科分类号：

摘要：

Due to the influence of inverter weak feed characteristics and current phase controlled characteristics, the anti-transition resistance ability of distance protection on photovoltaic side of transmission line of Photovoltaic Station is weak. This paper analyzed the composite sequence network of the transmission line of photovoltaic station under asymmetric short circuit fault by using the control strategy of restraining negative sequence current, and proposed the adaptive distance protection principle for the asymmetric short circuit fault of transmission line of photovoltaic station. Based on the open circuit property of photovoltaic side in negative sequence network, the equivalent impedance and fault point current of opposite side system were calculated in real time by local measured values, which were substituted into impedance analytical model to judge the faults inside and outside the area. The fault distance was accurately calculated by using single terminal electric quantity, which solves the problem of weak resistance to transition resistance of distance protection in weak feed scenario. In addition, the protection can adapt to the change of grid operation mode, and was not affected by the weak feed characteristics of inverter, and can be applied to the requirements of reactive power support of photovoltaic stations in different regions during fault. The test results show that the protection scheme can accurately identify the asymmetric faults inside and outside the protection zone. ©2022 Chin.Soc.for Elec.Eng.

引用

页码：6681 / 6692

页数：11

共 25 条

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