期刊论文

中文

电工技术学报

1000-6753

2024

39

05

1390-1403

10.19595/j.cnki.1000-6753.tces.222376

52007010:国家自然科学基金 HUST:YCJJ202202020:中央高校基本科研业务费专项资助项目

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变速抽蓄机组(VSPSU)的励磁及控制方式复杂且易发生失磁故障,配置针对性的失磁保护对保障其安全运行至关重要.该文基于直流励磁系统和交流励磁系统的差异分析,将VSPSU的失磁故障划分为对称失磁和不对称失磁两种故障形式,并主要针对对称失磁故障开展研究.首先,分别从故障位于机侧和网侧角度出发分析 VSPSU 发生对称失磁故障后的电气量变化特性及其故障危害;然后,推导证明了传统失磁阻抗圆保护判据在 VSPSU 中应用时不具有可靠性,VSPSU缺乏具有针对性的保护方案;最后,基于 VSPSU的失磁故障特性,提出了针对机侧对称失磁故障的下抛阻抗圆判据和针对网侧对称失磁故障的直流电压判据,两者结合形成了对...

The excitation and control methods of variable speed pumped storage units(VSPSU)are complex and prone to the loss of excitation(LOE)fault.Therefore,it is very important to configure targeted protection to ensure its safe operation.Due to the special three-phase AC excitation method used in VSPSU,its LOE fault is quite different from that of conventional units.At present,the LOE protection scheme of the traditional DC excitation synchronous machine is relatively mature,but there are few studies on the LOE fault characteristics and LOE protection of the AC excitation doubly-fed machine,and a rel...