电力系统保护与控制Issue(9)：14-19,6.
配网统一电能质量控制器直流电容的容量计算与分析
Calculation and analysis of DC capacitor capacitance in distribution UPQC
摘要
Abstract
DC capacitors in sub-modules are one of the main influence factors of MMC-UPQC’s cost and volume. Too large capacitance of DC capacitors will affect the practicability of MMC-UPQC in distribution network application. A control strategy is proposed to reduce the capacitance of DC capacitors in MMC-UPQC, in which shunt converter of MMC-UPQC absorbs appropriate quantity active power during voltage sag. Capacitance calculation methods of DC capacitors in MMC-UPQC with different voltage sag compensation strategies are analyzed, which points out that the proposed voltage sag compensation strategy has advantage on reducing the capacitance of the DC capacitors in MMC-UPQC. Through the simulation in PSCAD, the correction of the proposed voltage sag compensation strategy is verified. Using the proposed voltage sag compensation strategy in MMC-UPQC can reduce DC capacitors’ capacitance, save the equipment cost and reduce the equipment volume, which improve the practicability of MMC-UPQC in distribution network application.关键词
配网/统一电能质量控制器/模块化多电平变换器/直流电容/容量Key words
distribution network/unified power quality conditioner/modular multilevel converter/DC capacitor/capacitance分类
信息技术与安全科学引用本文复制引用
王浩,刘进军,梅桂华..配网统一电能质量控制器直流电容的容量计算与分析[J].电力系统保护与控制,2014,(9):14-19,6.基金项目
国家重点基础研究发展计划（973计划）基金资助项目(2009CB219705) （2009CB219705）
南方电网公司重点科技项目(K-GD2011-420) （K-GD2011-420）
