摘要
提出一种新的可变直流电抗器用于配合直流断路器切断故障电流,解决了柔性直流输电中无法满足的快速保护要求。这种电抗器在正常状态时具有低的电抗值,能最大程度减少对系统稳定性的不良影响。当系统发生直流故障时其值会自动增加,有效限制短路电流,且具有尺寸小、耗能少、对直流断路器的设计影响小等优点。采用电力系统电磁暂态仿真软件PSCAD/EMTDC对含有可变直流电抗器的两端单极VSC-HVDC输电系统进行动态和暂态仿真分析,验证了它的有效性和合理性。
A novel variable DC reactor for DCCBs is presented to limit DC fault current,which satisfies the request of fast protection on high voltage direct current flexible transmission. This reactor has low inductance during normal operation,which minimizes the adverse impact on the DC system stability.During a DC fault,the inductance will increase automatically to oppose the current rising. Moreover,it possesses other advantages,such as small size,low energy consumption and little impact on design of DCCBs. Dynamic and transient analysis of a two-terminal mono-polar VSC-HVDC link including DC reactors are simulated to testify its validity using PSCAD / EMTDC.
出处
《北京信息科技大学学报（自然科学版）》
2016年第2期24-28,共5页
Journal of Beijing Information Science and Technology University
基金
北京市属高等学校高层次人才引进与培养计划资助项目(CIT&TCD201304113)
国家留学基金资助项目(201408110027)
北京市教委科研计划资助项目(KM201511232008)
