Applicability Analysis of Distance Protection with Positive-sequence Voltage Polarization for Transmission Lines of Wind Farm with Direct-driven Turbines

被引：0

作者：

Li B. ^{[1
]}

Zhou B. ^{[1
]}

He J. ^{[1
]}

Dai W. ^{[2
]}

Wang C. ^{[2
]}

Xie Z. ^{[1
]}

机构：

[1] Key Laboratory of the Ministry of Education on Smart Power Grids, Tianjin University, Tianjin

[2] NARI Group Corporation, State Grid Electric Power Research Institute, Nanjing

来源：

Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2023年 / 47卷 / 22期

关键词：

distance protection; impedance relay; negative-sequence current suppression; permanent magnetic direct-driven wind turbine; positive-sequence voltage;

D O I：

10.7500/AEPS20221106005

中图分类号：

学科分类号：

摘要：

Under the background of the development of new power systems, the fault characteristics have changed profoundly, and the relay protection designed based on the synchronous machine characteristics faces severe challenges. This paper mainly discusses the applicability of distance protection with positive-sequence voltage as polarization voltage in the large-scale AC transmission line of permanent magnet direct-driven wind turbines. Considering the transient ride-through control behavior of grid-connected inverters, the fault characteristics of permanent magnet direct-driven wind turbines are analyzed. Then, the action performance of line impedance relay with positive-sequence voltage as polarization voltage under the connection of permanent magnet direct-driven wind turbines is studied, and the influences of different ride-through control strategies and different system operation conditions on its action performance are discussed. It is found that the reliability of the phase-to-phase relay in the wind farm is affected by the fault ride-through control of the grid-connected inverter of direct-driven wind turbines, and the performance is different under different reactive power compensation strategies. The reliability of the phase-to-phase impedance relay is better in the ride-through mode of“increasing reactive power and setting active power to be zero”. The reliability of the phase-to-phase impedance relay will be significantly reduced in the ride-through modes of“increasing reactive power, constant active power”and“increasing reactive power, limiting active power”. In addition，the reliability of the phase-to-phase impedance relay is also related to the system operation condition during stable operation in the ride-through modes of“increasing reactive power, constant active power”. The more the wind power output is, the lower the reliability of the phase-to-phase relay is. Based on the real-time digital simulation system, the grid-connected model of a typical wind farm with direct-driven turbines is built, and the correctness of the theoretical analysis is verified by a large number of real-time simulation tests. © 2023 Automation of Electric Power Systems Press. All rights reserved.

引用

页码：16 / 24

页数：8

共 22 条

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