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Short circuit current limiting technology based on early detection for mid-voltage system
Author(s): MIAO Xiren, LI Biao, WU Xiaomei, BAO Guanghai, WU Shoulong
Pages: 75-
81
Year: 2014
Issue:
11
Journal: Electric Power Automation Equipment
Keyword: mid-voltage system; electric power distribution; short circuit currents; wavelet transforms; fault detection; early detection; fault current limiter; breaking severity;
Abstract: 为了提高故障电流限制器(FCL)在中压系统中的性能,提出基于短路电流早期检测的故障限流技术.在建立中压配电短路故障仿真模型的基础上,提出利用Mallat多尺度分辨小波变换实现短路电流早期检测.以中压动态模拟系统为对象,验证了中压短路电流早期检测的有效性.以串联谐振型FCL为例,分析对比了基于常规短路判据与早期检测的故障限流效果;以断路器分断苛刻度为指标,分析早期短路检测对故障分断能力的影响.仿真分析表明,基于短路电流早期检测的故障限流技术性能良好.
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