摘要
为了解决目前在直流串联型风电场拓扑中存在的"弃风"问题,提出了一种新的直流串联型海上风电场的拓扑结构。首先介绍了该结构的分流电路是由2个功率开关管和1个电感构成;然后分析了分流电路的工作特性,通过控制分流电路补偿一个电流,使得各风机在输出功率不一致时,仍能实现最大功率追踪,并保证各风机端的出口电压不变,而不至于产生"弃风"现象;最后通过仿真验证了所提直流串联型海上风电场拓扑结构的可行性。
To solve the problem of＂abandon wind＂in the DC series-connected offshore wind farm nowadays,a novel to-pology of DC series-connected offshore wind farm is put forward in this paper. Firstly,the current-dividing circuit com-posed of two power switches and one inductor is introduced. Secondly,the characteristics of the current-dividing circuitis analyzed. When the power outputs of different wind generators are different,the maximum power point tracking canstill be realized by compensating one current through the control of current-dividing circuit. In this way,the power cur-rents of different wind generators can be kept stable,thus the phenomenon of＂abandon wind＂is avoided.Finally,thefeasibility of the topology of DC series-connected wind farm proposed in this paper is verified through simulations.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2018年第2期36-42,共7页
Proceedings of the CSU-EPSA
基金
国家国际科技合作专项资助项目(2015GK3012)
关键词
海上风电
拓扑
直流串联
分流电路
最大功率追踪控制
offshore wind power
topology
DC series-connected
current-dividing circuit
maximum power point tracking control
