Pilot Protection Based on Energy Distribution for Transmission Line Connected to Renewable Power Plants

被引：0

作者：

Yang G. ^{[1
]}

Fan P. ^{[1
]}

Wang C. ^{[1
]}

Yu Y. ^{[1
]}

Lü P. ^{[2
]}

Liang Y. ^{[1
]}

Zhang Z. ^{[2
]}

机构：

[1] State Key Laboratory of Power Grid Safety and Energy Conservation, China Electric Power Research Institute, Haidian District, Beijing

[2] State Grid Corporation of China, Xicheng District, Beijing

来源：

Dianwang Jishu/Power System Technology | 2023年 / 47卷 / 04期

关键词：

differential protection; energy distribution; fault analysis; renewable energy grid connection;

D O I：

10.13335/j.1000-3673.pst.2022.0273

中图分类号：

学科分类号：

摘要：

With the increase of the scale of renewable energy, power electronic devices in power systems are also increasing. This causes the short-circuit currents of the transmission line to present the characteristics of controlled phase angles, limited amplitudes, etc., which brings new challenges to the traditional protection based on the power frequency components. By utilizing the difference distribution of the differential current frequency bands in the internal and the external area faults, the signal energy is defined to characterize the difference distribution of differential current frequency bands in the internal and the external area faults. Then, a new criterion of pilot protection based on the energy distribution of differential current frequency bands is proposed. This protection does not rely on the power frequency and is less affected by the new characteristics of short-circuit current brought by the power electronic devices. It can be applied to the transmission lines of different types of the new energy stations. The proposed protection principle is verified by simulation. The fastest action time of the protection scheme is 3ms, and it has the strong ability to withstand fault resistance. © 2023 Power System Technology Press. All rights reserved.

引用

页码：1415 / 1422

页数：7

共 29 条

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