基于模型辨识的配电线路永久性故障判定方法

doi:10.19595/j.cnki.1000-6753.tces.180242

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摘要为提高配电线路重合闸成功率,提出一种相间故障检测技术,在配电变压器低压侧接入受控逆变电源,利用其给停电线路施加瞬时高压以击穿可能存在的故障点。基于产生的暂态电压、电流获取停电线路的频率响应,研究建立不同故障性质下停电线路的频域特性,进而结合模型辨识原理对停电线路内部结构进行有效辨识,判别线路故障性质以决定断路器是否重合闸。该方法现场可实施性强,既可用于配电线路自适应重合闸,也可用于停电一段时间后的线路再送电,理论、仿真和模拟实验都验证了该方法的有效性。

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	丁芃
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关键词 ：配电网, 模型辨识, 故障性质, 逆变电源

Abstract：In order to improve the success rate of automatic reclosing of distribution lines, a method for detecting the interphase faults of distribution lines is proposed. A controlled inverter source, which is connected to the low-voltage side of the service transformer, applies an instantaneous high voltage to the de-energized line to break down the possible fault points. Frequency responses of the de-energized line can be obtained based on generated transient voltage and current. By analyzing the frequency domain characteristics of the de-energized line for different fault properties, the internal structure of the de-energized line is identified and the fault property is determined with model recognition principle. Therefore, the decision whether to reclose the circuit breaker can be made confidently. This method can not only be used for adaptive reclosing of distribution lines but also for power recovery after a period of power failure. Theoretical calculation, simulation and experiment have all proved the effectiveness of this method.

Key words： Distribution network model recognition fault property inverter source

收稿日期: 2018-02-27 出版日期: 2019-03-21

PACS:

TM774

基金资助:山东省重点科技计划资助项目（2015GGX104010）

通讯作者: 朱珂 ,男,1977年生,博士,副教授,研究方向为电能质量、电力电子技术在电力系统中的应用等。E-mail：zhuke@sdu.edu.cn

作者简介: 丁芃,男,1994年生,硕士研究生,研究方向为电力电子技术在电力系统中的应用。E-mail：ding_pengg@163.com

引用本文:

丁芃,朱珂,朱裕庆,栾悦祎. 基于模型辨识的配电线路永久性故障判定方法[J]. 电工技术学报, 2019, 34(5): 1004-1012. Ding Peng, Zhu Ke, Zhu Yuqing, Luan Yueyi. Determining the Permanent Fault in Distribution Lines Based on Model Recognition. Transactions of China Electrotechnical Society, 2019, 34(5): 1004-1012.

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