基于剩余电压S转换的灵活直流电网的适应性重新关闭方案
Yue Dai1,2, Hongchun Shu1, Na An1
1State Key Laboratory of Collaborative Innovation Center for Smart Grid Fault Detection, Protection and Control Jointly, Kunming University of Science and Technology, Kunming, 650500, China.
Scientific reports
|April 12, 2025
概括
本研究介绍了一种适应性重新关闭方案,使用剩余电压上的S变换来准确识别电力传输系统中的故障类型和灭绝时刻. 新方法提高了安全性,并通过防止重新关闭永久故障来加快电力恢复速度.
科学领域:
- 电气工程 电气工程
- 电力系统 电力系统
背景情况:
- 传统的自动重新关闭方案难以准确识别故障,有可能将重新关闭用于永久性故障,并导致系统不稳定.
- 现有的方法在确定断路弧灭绝时刻方面缺乏精度,阻碍了快速恢复电力.
- 重新关闭永久故障的二次影响对电力传输系统的稳定性构成重大威胁.
研究的目的:
- 为电力传输系统开发一个创新的适应性重新封闭方案.
- 为了准确地识别断层的性质,并精确地确定断层弧的灭绝时刻.
- 通过防止二次故障影响,提高电力传输系统的安全性和可靠性.
主要方法:
- 建议采用剩余电压的S变换进行适应性重新关闭方案.
- 应用静电感应原理来计算故障弧灭绝前后的感应电压.
- 使用振幅平方和平均值的总和,增强剩余电压突然变化特征.
主要成果:
- 拟议的方案准确地识别了断层的性质,并精确地确定了弧度灭绝时刻.
- 与传统方案相比,模拟实验表明短暂故障的重新关闭时间缩短了.
- 该方法有效地防止了由于重新关闭永久故障而引起的二次故障影响.
结论:
- 适应性回收计划提供了高度的便利性和实用性,而不需要额外的控制措施.
- 这种创新方法加速了电力供应恢复,并大大提高了电力传输系统的安全性和稳定性.
- 基于S变换的方法为现代电力系统的保护和运行提供了可靠的解决方案.
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