广东电力Issue(1)：89-93,99,6.DOI:10.3969/j.issn.1007-290X.2014.01.018
10 kV统一电能质量控制器配电网应用研究
Research on Application of 10 kV UPQC in Distribution Network
摘要
Abstract
Five methods are proposed in this paper to improve practicability of the modular multilevel converter based unified power quality conditioner (MMC-UPQC)equipment in 1 0 kV distribution network.In the first method,variable turn ratio transformers are used to replace series transformer of the traditional MMC-UPQC,which increases the voltage sag compen-sation depth.In the second method,two series converters in series are used to replace single series converter in the traditional MMC-UPQC,which reduces the common DC link voltage level and decreases the insulation requirement of the valve set cab-inet.In the third method,shunt converter absorbs appropriate quantity active power during the voltage sag,which reduces releasing energy of the DC capacitors in sub-modules and decreases capability of the DC capacitors.In the fourth method, hybrid frequency control sub-modules are used in MMC-UPQC and the frequencies of sub-modules are set by power quality problems they handled,which reduces the switching power loss in sub-modules and decreases cooling requirement.In the fifth method,circulating current suppressing control is introduced in control strategy,which reduces the circulating current in MMC-UPQC’s converters and decreases inductance of the arm inductors.Compared with the traditional MMC-UPQC, MMC-UPQC with the proposed five methods can increase the voltage sag compensation capability and decrease the area and cost.关键词
统一电能质量控制器/配电网/模块化多电平变换器/公共直流侧/直流电容Key words
unified power quality conditioner/distribution network/modular multilevel converter/common DC link/DC capacitor分类
信息技术与安全科学引用本文复制引用
王浩,刘进军,刘正富..10 kV统一电能质量控制器配电网应用研究[J].广东电力,2014,(1):89-93,99,6.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) （973计划）
南方电网公司重点科技项目(K-GD2011-420) （K-GD2011-420）
