摘要
为解决地铁直流牵引供电系统出现阶跃波形时引起的保护误动问题,提出了一种基于固定时间判断的电流增量保护优化方案。首先,阐述了电流增量保护优化方案;然后,在固定时间内通过动态判断电流变化率与电流增量确定触发保护动作出口;其次,为电流增量保护优化方案设计出完整的数据处理流程;最后,通过实验进行功能验证。实验结果表明电流增量保护优化方案能有效解决系统出现阶跃波形时的保护误动问题。
In order to solve the problem of protection undesired activaton caused by step waveforms in subway direct-current traction power supply system,this article proposes a current incremental protection optimization scheme based on fixed time judgment.First the optimization scheme of current incremental protection is elaborated in detail.Then within a fixed time the activating outlet of protection action is determined by dynamically judging current variation rate and current increment.Second a complete data processing flow is designed for the current incremental protection optimization scheme.Finally utility verification is carried out through experiments whose results confirm the effectiveness of the proposed optimization scheme in solving the problem of protection undesired activation when the system encounters step waveform.
作者
谢悦海
王攀
常宝波
XIE Yuehai;WANG Pan;CHANG Baobo(Guangzhou Yangxin Technology Research Co.,Ltd.,Guangzhou 510540,China)
出处
《电工技术》
2023年第23期37-39,共3页
Electric Engineering
关键词
DI/DT
故障时间判断
保护优化方案
电流增量保护
di/dt
fault time judgment
protection optimization scheme
current increment protection
