关键词: 直流换流站, 无功分组, 交流滤波器, 并联电容器组

Abstract: It is possible to use different sizes for AC filters and shunt capacitors at HVDC convertor station in order to reduce cost. Based on statistics of shunt reactive power sub-banks sizes at the convertor stations that have been put into operation in China, comparison between sizes of AC filters and shunt capacitors at HVDC convertor station is explored. In order to reduce the number of shunt sub-banks and thus the cost and area occupation of reactive power compensation devices, possibility and feasibility for variation in sizing AC filters and shunt capacitors at converter stations under different AC system conditions are investigated. The scenarios discussed include sending AC system comprised of mainly thermal power plant, sending AC system comprised of mainly hydro power plant and receiving AC system with diverse power resources. Prospect and reasonable suggestion are proposed to provide reference for design work of HVDC project.

Key words: HVDC converter station, shunt reactive sub-bank, AC filter, shunt capacitor