基于超级电容器的电网短路故障监测系统自供电电源研究

doi:10.19595/j.cnki.1000-6753.tces.191722

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摘要为改善传统电网短路故障监测系统的供电问题,提出一种可用于电网短路故障远程监测系统的自供电电源。电网发生短路故障后,自供电电源开始储存短路故障能量,通过快速对前置电容充电建立故障监测所需工作电压,并对超级电容器(SC)充电,获取监测系统发送故障信号所需能量。根据设定的前置电容迟滞上限电压及其建立时间、监测系统最小工作电压、正常工作状态所需功率,提出前置电容容量的设计方法;根据短路持续时间、SC的最小放电截止电压和最大工作电压及系统期望维持时间,提出SC容量的设计方法。设计了自供电电源样机,并应用于电网短路故障监测系统,实验结果验证了理论分析及自供电电源设计方案和方法的可行性。

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	李艳
	刘树林
	王颖

关键词 ：自供电电源, 短路故障监测, 超级电容器, 低功耗

Abstract：In order to improve the power supply problem of traditional power grid short-circuit fault monitoring system, a kind of self-powered power supply for grid short-circuit fault remote monitoring system is proposed. After short-circuit fault occurs, self-powered power supply starts to store the short-circuit fault energy, and the working voltage required for fault monitoring is quickly set up by charging the pre-capacitor, and the super-capacitor (SC) is charged to obtain the energy needed for the monitoring system to send the fault signal. According to the set hysteresis upper limit voltage of the pre-capacitor and its setting time, monitoring system minimum operating voltage and the power required for normal operation condition, a design method of the pre-capacitor capacity is proposed. According to the short-circuit duration, the maximum operating voltage, the minimum discharge cut-off voltage of the SC and the expected maintenance time of the system, a design method of the SC capacity is proposed. The self-powered power supply prototype is designed and applied to the grid short-circuit fault monitoring system. The experimental results verify the feasibility of theoretical analysis and self-powered power supply design schemes and methods.

Key words： Self-powered power supply short-circuit fault monitoring supercapacitor (SC) low power consumption

收稿日期: 2019-12-09

PACS:	TM53
	TM76

基金资助:国家自然科学基金项目(51777167,51604217)、陕西省技术创新引导专项计划项目(2017CGZH-XNGJ-09)、陕西省教育厅专项项目(19JK1002)和榆林市科技局项目(2019-85-4)资助

通讯作者: 刘树林男,1964年生,博士,教授,博士生导师,研究方向为开关变换器的分析与设计、集成电路以及本质安全电路等。E-mail:lsigma@163.com

作者简介: 李艳女,1985年生,博士研究生,讲师,研究方向为开关变换器的分析与设计以及本质安全电路等。E-mail:lisalee@yulinu.edu.cn

引用本文:

李艳, 刘树林, 王颖. 基于超级电容器的电网短路故障监测系统自供电电源研究[J]. 电工技术学报, 2020, 35(zk2): 569-576. Li Yan, Liu Shulin, Wang Ying. Research on Self-Powered Power Supply of Short-Circuit Fault Monitoring System Applied in Grid Based on Supercapacitor. Transactions of China Electrotechnical Society, 2020, 35(zk2): 569-576.

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