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下垂控制型微电网孤岛检测盲区通用性求解方法
作者:
作者单位:

1.强电磁工程与新技术国家重点实验室(华中科技大学),湖北省武汉市 430074;2.易事特集团股份有限公司,广东省东莞市 523808

摘要:

目前孤岛检测研究中针对下垂控制策略下过欠电压检测法与过欠频率检测法的检测盲区分析计及因素尚未完备,相关参数对检测盲区的分布影响暂不清晰且分析方法难以适用于复杂实际微电网。为此,面向下垂控制型微电网实际运行工况,首先分析得到下垂控制方程、负荷等效方程、线路功率方程、稳态功率平衡方程4类通用性方程,并将其联立采用牛顿-拉夫逊法迭代求解检测盲区。然后,以可视化方式着重考虑了负荷等效模型、线路阻抗参数及下垂控制特性对检测盲区的分布影响,揭示了下垂控制的检测盲区特性。最后,基于仿真软件验证了检测盲区分析的正确性,并证实了检测盲区求解算法适应求解不同工况的优异性能。

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基金项目:

国家重点研发计划资助项目(2018YFB0904100); 东莞市引进创新科研团队计划资助项目(201536000200036)。

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General Solution Method of None-detection Zone for Droop-controlled Islanding Detection in Microgrid
Author:
Affiliation:

1.State Key Laboratory of Advanced Electromagnetic Engineering and Technology (Huazhong University of Science and Technology), Wuhan 430074, China;2.Guangdong EAST Power Co., Ltd., Dongguan 523808, China

Abstract:

The problems in islanding detection research at present is that the analysis and factors of the none-detection zone of the over/under voltage detection method and the over/under frequency detection method in droop control strategy are not complete, the influence of related parameters on none-detection zone is not clear and the analysis method is difficult to apply to the complicated actual microgrid. Firstly, four general equations of droop control equation, load equivalent equation, line power equation and steady-state power balance equation are obtained based on the analysis of actual microgrid operation conditions equipped with distributed resources in droop control strategy, and solved iteratively by Newton-Raphson method. Then the influence of load equivalent model, line impedance parameter and droop control performance on none-detection zone distribution is considered in a visual way, and the characteristics of none-detection zone are revealed. Finally, based on the simulation software, the correctness and accuracy of the analysis of none-detection zone are verified, and the excellent performance of solving algorithm for none-detection zone is proved to be suitable for solving different operation conditions.

Keywords:

Foundation:
This work is supported by National Key R&D Program of China (No. 2018YFB0904100) and Introduction of Innovative Research Teams in Dongguan (No. 201536000200036).
引用本文
[1]吴宇奇,叶雨晴,马啸,等.下垂控制型微电网孤岛检测盲区通用性求解方法[J/OL].电力系统自动化,http://doi. org/10.7500/AEPS20201103008.
WU Yuqi, YE Yuqing, MA Xiao, et al. General Solution Method of None-detection Zone for Droop-controlled Islanding Detection in Microgrid[J/OL]. Automation of Electric Power Systems, http://doi. org/10.7500/AEPS20201103008.
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  • 收稿日期:2020-11-03
  • 最后修改日期:2021-02-19
  • 录用日期:2021-02-03
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