高压直流模块化多级转换器 (HVDC-MMC) 模型的开发和验证,用于转换器变压器保护研究
Krzysztof Solak1, Waldemar Rebizant1, Frank Mieske2
1Faculty of Electrical Engineering, Wroclaw University of Science and Technology, 50-370 Wrocław, Poland.
Sensors (Basel, Switzerland)
|May 25, 2024
概括
这项研究模拟了基于逆变器的高压直流 (HVDC) 系统,以解决保护方面的挑战. 开发的模型增强了故障通行和电流注入,以在干扰期间保持稳定的电网运行.
科学领域:
- 电气工程 电气工程
- 电力系统保护保护 电力系统保护
- 整合可再生能源的整合
背景情况:
- 基于逆变器的电源为电网中的电气保护带来了新的挑战.
- 现有的保护策略需要调整,以适应来自HVDC-MMC链路等来源的故障贡献.
- 电网代码要求在电网故障时采取特定的应对措施,例如在电网故障时注入反应电流.
研究的目的:
- 开发和验证HVDC-MMC链路的研究案例模型,用于测试保护行为.
- 实施和增强用于故障通行 (FRT) 能力和快速故障电流注入的转换器控制.
- 在电网故障条件下分析基于逆变器的系统的稳定性和保护行为.
主要方法:
- 开发一个详细的HVDC-MMC链接模型用于模拟.
- 为矢量电流控制 (VCC) 实现双重脱同步参考框架相锁循环 (DDSRF-PLL).
- 整合了故障检测和故障通行参考发生器,具有电流限制,提高了DDSRF的稳定性.
主要成果:
- 开发的模型成功验证了转换器控制,FRT功能和快速故障电流注入.
- 对DDSRF-PLL的改进提高了电流控制稳定性,这对于基于逆变器的系统至关重要.
- 该研究表明,即使在严重的电网故障期间,也能够在基于逆变器的环境中对保护行为做出一般陈述.
结论:
- 开发的HVDC-MMC模型为研究基于逆变器的电力系统的保护挑战提供了一个强大的平台.
- 加强的控制策略,包括改进的DDSRF-PLL,在故障期间有效地保持稳定性和满足电网代码要求.
- 这项研究有助于确保现代电网的可靠运行和保护,其中包括大量基于逆变器的发电.
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