双闭环PI控制,完全消除基于中性点的零序列电压的补偿弧
Hongwen Liu1,2, Xiangjun Zeng3, Qing Yang4
1State Key Laboratory of Power Transmission Equipment and System Security and New Technology, Chongqing University, Chongqing, 400044, China. liuhongwen_19@163.com.
Scientific reports
|July 11, 2024
概括
本研究引入了一种双闭环PI控制方法,以改善电力系统在接地故障期间的电弧抑制. 新方法有效地稳定了剩余电压,确保了可靠的电弧灭.
科学领域:
- 电气工程 电气工程
- 电力系统分析 分析 分析
- 检测和减轻故障的检测和减轻.
背景情况:
- 电力系统中的接地故障会由于不平衡的参数产生零序电压,从而对电弧抑制产生负面影响.
- 现有的电弧抑制方法在各种接地模式下与不平衡参数的影响作斗争.
- 可控制的电压源提供了改进电弧抑制的潜力,但需要精确的控制策略.
研究的目的:
- 分析地面不平衡参数对电弧抑制效率的影响.
- 为了揭示完全补偿电弧抑制的机制,使用中性点零序电压.
- 开发和验证一种新的控制模型,用于在接地故障时增强电弧抑制.
主要方法:
- 分析地面不平衡参数及其对可控制电压源电弧抑制的影响.
- 使用双闭环比例整合 (PI) 控制器开发完全补偿的电弧抑制模型.
- 基于中性点电压偏差和故障阶段剩余电压的控制策略的实施.
主要成果:
- 双闭环PI控制算法有效地稳定可控制电压源输出波形.
- 与传统方法相比,剩余电压稳定时间得到了显著改善,从43ms到2.4s.
- 拟议的方法始终将接地故障阶段的余电压降低到10V以下,确保可靠的电弧灭.
结论:
- 开发的双闭环PI控制方法为接地故障中电弧抑制提供了强大的解决方案.
- 这种方法通过确保有效的电弧灭火,提高了电力系统的稳定性和可靠性.
- 模拟和低压测试证实了算法的可行性和有效性.
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