摘要
针对统一电能质量调节器开关器件多、结构复杂的缺点,提出应用九开关变换器替代传统电路拓扑,并提出一种适用于统一电能质量调节器的混合调制策略。介绍了九开关变换器的电路拓扑及2种基本工作方式,从理论上分析了基于九开关变换电路统一电能质量调节器的输出电压的变化规律,并推导出所提调制策略的直流偏置的计算公式。介绍了与之相匹配的控制策略。通过仿真验证了所提替换方案及调制策略的正确性与有效性。所提出替换方案及调制策略能够降低统一电能质量调节器的成本。
Aiming at the disadvantages of UPQC（Unified Power Quality Conditioner）,such as large switch quantity and complex structure,the nine-switch converter is applied to replace its traditional topology and a hybrid modulation strategy suitable for it is proposed. The circuit topology and two basic operating modes of nine-switch converter are introduced. The output voltage variation law of the improved UPQC is analyzed and the formula for calculating the DC bias of the proposed modulation strategy is derived. The corresponding control strategy is presented. The correctness and effectiveness of the proposed replacement scheme and modulation strategy are verified by simulation,and the UPQC cost is thus reduced.
出处
《电力自动化设备》
EI
CSCD
北大核心
2016年第10期78-84,共7页
Electric Power Automation Equipment
基金
中国石油科技创新基金资助项目(2013D-5006-0310)
哈尔滨工业大学科研创新基金资助项目(HIT.NSRIF.2013020)~~
关键词
九开关变换器
统一电能质量调节器
稳态分析
调制策略
nine-switch converter
unified power quality conditioner
steady-state analysis
modulation strategy
