针对雅中—江西±800 kV直流输电工程受端换流站采用分层接入技术、换流站无功配置更为复杂的特点，为保证江西电网交、直流系统的无功平衡和安全稳定运行，通过对直流额定功率运行方式下的最大容性无功消耗及无功分组投切引起的电压波动进行计算，提出雅中—江西±800 kV 直流工程受端换流站的容性无功补偿总容量需求和分组容量要求，配置容性无功补偿方案，并分析了采用动态无功补偿设备以减少无功分组数的可行性。为节省占地和工程投资，进一步对无功大组容量进行优化，并根据目前国内已投运各换流站的实际无功运行情况，提出对无功大组容量限制可以放宽考虑，在系统运行上可以不再考虑“N-1”方式，切除无功大组的电压波动可按全接线方式校核。%In allusion to problems of the receiving-end converter station of Yazhong-Jiangxi ±800 kV DC transmission pro-ject using hierarchical accessing technology and complicated reactive power configuration,and in order to ensure reactive power balance and security and stability of AC/DC systems of Jiangxi power grid,this paper conducts calculation for the maximum capacitive reactive power consumption and voltage fluctuation caused by reactive power grouping and switching under the operation mode of DC rated power. It proposes requirements for total capacity of capacitive reactive power com-pensation and grouping capacity,and allocates capacitive reactive power compensation scheme as well as explains feasibility of using dynamic reactive power compensation equipments to reduce reactive power grouping numbers. In order to save occu-pation of land and investment,it optimizes reactive power bank capacity. According to actual reactive power operation in domestic at present in converter stations,it proposes to relax restriction to reactive power bank capacity,not to consider N-1 mode for system operation any moreand switch off voltage fluctuation of reactive power bank with system-wide connection mode.
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