| 引用本文: | 黄宗超,王帆,刘一民,雷淇,李银红.基于串补线性化模型的含串补线路距离保护整定方法[J].电力自动化设备,2019,39(11): |
| HUANG Zongchao,WANG Fan,LIU Yimin,LEI Qi,LI Yinhong.Distance protection setting method of series-compensated line based on series compensation linearized model[J].Electric Power Automation Equipment,2019,39(11): |
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| 摘要: |
| 在含串联补偿装置(简称串补)线路的距离保护整定中，往往忽略金属氧化物非线性电阻(MOV)动作时串补对外呈现的非线性阻抗特性，这使得距离保护整定存在不准确、灵敏度低的不足。采用串补线性化模型描述串补MOV的影响，分析了含串补线路距离保护测量阻抗的分布特性，提出了一种基于串补线性化模型的距离保护整定方法，实现了含串补线路距离保护的精细化整定。采用某实际电网算例，验证了所提方法的有效性。仿真结果表明，该方法所得保护定值较传统整定方法具有更高的灵敏性。 |
| 关键词: 串联补偿装置 线性化模型 距离保护整定 继电保护 灵敏性 |
| DOI：10.16081/j.epae.201909025 |
| 分类号:TM77 |
| 基金项目: |
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| Distance protection setting method of series-compensated line based on series compensation linearized model |
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HUANG Zongchao1, WANG Fan2, LIU Yimin2, LEI Qi1, LI Yinhong1
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1.State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;2.North China Branch of State Grid Corporation of China, Beijing 100000, China
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| Abstract: |
| In the distance protection setting of series-compensated lines, the nonlinear impedance characteristics of the series compensation devices when the MOV(Metal Oxide Varistor) acts are often neglected, which causes inaccuracy and low sensitivity of distance protection setting. The series-compensated linearization model is used to describe the influence of series-compensated MOV. The distribution characteristics of the measured impedance of the distance protection of series-compensated lines are analyzed. A distance protection setting method based on the series-compensated linearization model is proposed, which realizes the refined setting of the distance protection of series-compensated lines. The effectiveness of the proposed method is verified by an actual power grid example. The simulative results show that the setting values obtained by the proposed method is more sensitive than those obtained by traditional setting methods. |
| Key words: series compensation device linearized model distance protection setting relay protection sensitivity |
