CAJ | 학술논문

换相失败故障发生后引起的的故障电流会对直流输电系统带来严重影响.目前,对换相失败故障发生后暂态机制的研究主要针对的是作为理想开关的换流器,文章利用叠加原理和等效分析的方法考虑了实际阀参数对故障电流的影响,并通过建立考虑实际换流阀的12脉动换流器的PSCAD仿真模型,将仿真波形与理论分析结果进行对比,验证了理论分析方法的正确性.
환상실패고장발생후인기적적고장전류회대직류수전계통대래엄중영향.목전,대환상실패고장발생후잠태궤제적연구주요침대적시작위이상개관적환류기,문장이용첩가원리화등효분석적방법고필료실제벌삼수대고장전류적영향,병통과건립고필실제환류벌적12맥동환류기적PSCAD방진모형,장방진파형여이론분석결과진행대비,험증료이론분석방법적정학성.
The fault current caused by commutation failure seriously affects the secure operation of HVDC power transmission system. At present, the attention of the research on the mechanism of transient after the occurrence of commutation failure is paid to the converter that is regarded as ideal switch, in this paper, utilizing the method based on superposition principle and equivalent analysis the influences of actual valve parameters on fault current are taken into account, and by means of constructing a PSCAD simulation model, in which the 12-pulse converter used in actual converter valves is considered, the waveforms from simulation results are compared with the results from theoretical analysis to verify the correctness of theoretical analysis method.