串并联型海上风电场机组均压控制  

Voltage equalization control of series-parallel offshore wind farm units

作　　者：李世军[1] 邝孝威 夏湘滨 陈懿媛 冯水平 阳典意 王雅程 万琴[1] LI Shijun;KUANG Xiaowei;XIA Xiangbin;CHEN Yiyuan;FENG Shuiping;YANG Dianyi;WANG Yacheng;WAN Qin(College of Electrical&Information Engineering,Hunan Institute of Engineering,Xiangtan 411101,China;Hunan Huaxia Special Transformer Co.,Ltd.,Xiangtan 411101,China;Hunan Deyi Electric Co.,Ltd.,Xiangtan 411101,China)

机构地区：[1]湖南工程学院电气与信息工程学院,湖南湘潭411101 [2]湖南华夏特变股份有限公司,湖南湘潭411101 [3]湖南德意电气有限公司,湖南湘潭411101

出　　处：《重庆理工大学学报（自然科学）》2024年第6期281-287,共7页Journal of Chongqing University of Technology：Natural Science

基　　金：湖南省教育厅科学研究项目(22B0740);湘潭市揭榜挂帅项目(CG-ZDGS20231002);湖南省企业科技特派员计划项目(2021GK5042);湖南省自科基金项目(2022JJ50122)。

摘　　要：针对串联型风机簇产生弃风的问题,在直流侧添加基于超级电容的储能单元,并在串联簇中设置一台参考机组,通过控制双向DC/DC变换器的吸收、释放电能,使同串联簇中除参考机组之外的其他机组向直流汇集母线上输出的功率相同,使直流风机风电功率和风机出口电压一致,实现基于超级电容储能的直流机组的均压控制,以此减少直流风机串联簇各机组间的风电功率差,降低弃风率。针对传统两相DC/DC变换器电感电流纹波大,两相电流不均衡等问题,采用了一种移相均流控制策略。最后,在Matlab/Simulink搭建了仿真模型,仿真结果验证了所提出的策略的有效性。To address the issue of wind curtailment in serially connected wind turbine clusters,a supercapacitor-based energy storage unit is added to the DC side.In the serial cluster,a reference turbine is set,and by controlling the bidirectional DC/DC converter to absorb and release energy,the power output to the DC bus from other turbines in the same cluster,except for the reference unit,is equalized.This achieves consistent wind power and outlet voltage across the DC wind turbines,implementing supercapacitor-based equal voltage control for DC turbines.This approach reduces the difference in wind power output between the turbines in the serial cluster,thereby lowering the rate of wind curtailment.Furthermore,to address issues such as large inductor current ripple and imbalance in two-phase DC/DC converters,a phase-shifting current balancing control strategy is employed.Finally,a simulation model is built in Matlab/Simulink,and our simulation results validate the effectiveness of the proposed strategy.

关 键 词：均压控制 弃风 移相均流控制 新型变换器 

分 类 号：TM46[电气工程—电器]