电网技术2016，Vol.40Issue(3)：925-930,6.DOI:10.13335/j.1000-3673.pst.2016.03.038
电压不平衡时交直流双向功率变换器的控制策略
Control Method of Bidirectional AC/DC Converter With Unbalanced Voltage in Hybrid Micro-Grid
摘要
Abstract
Three phase AC/DC converter based on traditional double loop control may act as linkage in hybrid micro-grid due to its bidirectional power flow with unit power factor on AC side.When AC/DC converter works under unbalanced voltage on AC side,a second order ripple voltage will be generated in DC-link and some amount of third order harmonic current will exist in AC side,deteriorating micro-grid operation.In this paper,a math model of three-phase AC/DC converter in synchronous rotating frames is established under unbalanced voltages,and expression for power transmission is derived so that power control strategy of the converter is improved.At the same time the second order ripple in DC voltage is eliminated by connecting a small capacity of capacitor on DC bus due to its fast charging and discharging features.Simulation and experimental results verify feasibility of the control system.关键词
电压不平衡/混合微电网/三相AC/DC变换器/超级电容Key words
unbalanced voltage/hybrid micro-grid/three-phase AC/DC converter/super capacitor分类
信息技术与安全科学引用本文复制引用
郭文娇,任春光,王磊,韩肖清,赵耀民..电压不平衡时交直流双向功率变换器的控制策略[J].电网技术,2016,40(3):925-930,6.基金项目
本文得到了“山西省煤基重点科技攻关项目(MD2014-06)”的资助,谨此致谢！ （MD2014-06）
