电力系统及其自动化学报2017，Vol.29Issue(5)：108-114,7.DOI:10.3969/j.issn.1003-8930.2017.05.018
一种新型直流串联风机并网拓扑结构及其控制策略
A Novel Topology of Series-connected DC Offshore Wind Turbines and Its Control Strategy
摘要
Abstract
In order to solve the problem of overvoltage caused by the unbalanced wind speeds,this paper presents a nov?el topology of series-connected DC offshore wind turbines system and its control strategy. The proposed structure only need a Cuk circuit at the end of the DC bus onshore to keep the DC current steady and track the maximum power of ev?ery fan. Its control methods include maximum power point tracking control,current control and grid-connected control. The structure of the system and its control strategy are discussed in detail,and a simulation model is established in Simulink. This system has the advantages of relatively less hardware and high utilization rate of wind energy ,and it can avoid overvoltage under unbalanced wind speeds,which can guarantee its reliable operation. Meanwhile,the step-down function of Cuk circuit can save a buck converter for the inverter. The simulation results verify the feasibility of the sys?tem and its control strategy.关键词
海上风电/并网/Cuk电路/最大功率追踪/电流控制Key words
offshore wind farm/grid-connected/Cuk circuit/maximum power point tracking(MPPT)/current control分类
信息技术与安全科学引用本文复制引用
荣飞,李俊,刘诚,徐业事..一种新型直流串联风机并网拓扑结构及其控制策略[J].电力系统及其自动化学报,2017,29(5):108-114,7.基金项目
国家国际科技合作专项资助项目(2011DFA62240) （2011DFA62240）
国家自然科学基金资助项目(51377050) （51377050）
