摘要
冲击暂态工况下,实现各级晶闸管电压分布均匀是换流阀设计的重要工作。随着晶闸管串联级数的增加,电位分布不均匀的累积效应更为突出,需要研究可靠性更高的均压措施。该文提出换流阀冲击暂态建模方法,分析影响换流阀冲击电压分布特性的机理,提出配置屏蔽电容、分散式屏蔽系统、饱和电抗器集中布置等均压措施,分析各项均压措施的可行性。在真型阀塔中,构造出饱和电抗器分散、集中两种布局形式,在相同激励下,分别测试多串联单元的电压分布,验证了均压措施的合理性和可行性。
In impulse voltage,equalizing the voltage of the various thyritors is the key. With the number of the thyristors in the ultra high voltage direct current（UHVDC） valve increasing, the bias of voltage enduring by various thyristors is more apparent. This paper put forward the equivalent simplified method of HVDC valve with many conductors and complex circuit network. Several voltage balancing schemes of HVDC converter valve were advised, such as installing the equal voltage capacitor, choosing the scattered shielding system and concentrating all of the satural reactors in the whole valve, and the adverse effect and advantage of the schemes were analyzed. In the real valve tower, the distribution and concentration of the satural reactor arrangement scheme were formed, and the voltage of the first and last thyristor were measured, which means the concentration of the satural reactor adduces the better voltage distribution.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2016年第7期1828-1835,共8页
Proceedings of the CSEE
关键词
特高压直流换流阀
分布电容
均压电容
屏蔽系统
饱和电抗器
high voltage direct current（HVDC） converter valve
distribution capacitance
equal voltage capacitor
shielding system
satural reactor
