摘要
随着风电渗透率的提高,电网逐渐呈现弱电网特性。传统的电流控制型双馈风力发电机(current controlled doubly fed induction generator,CC-DFIG)组由于锁相环的影响,难以在弱电网下稳定运行。混合控制型双馈风力发电机(hybrid controlled doubly fed induction generator,HC-DFIG)组定子侧采用功率同步的方式,适合在弱电网下运行。为进一步对HC-DFIG的稳定性进行分析,运用D分割法,在多重稳定条件的约束下,得到HC-DFIG的控制器参数稳定范围和控制器参数变化对DFIG稳定性的影响,以及HC-DFIG和CC-DFIG两种控制策略适合运行的电网短路比范围,并设计两种策略的交替切换来提高DFIG并网稳定性。最后通过仿真和实验进行验证。
With the increase of wind power permeability,the power grid gradually presents the characteristics of weak power grid.The traditional current controlled doubly fed induction generator(CC-DFIG)group is difficult to operate stably in a weak grid due to the influence of the phase-locked loop.The hybrid controlled doubly fed induction generator(HC-DFIG)group adopts power synchronization on the stator side,which is suitable for operation in a weak grid.In order to further analyze the stability of HC-DFIG,the D-segmentation method was used to obtain the stability range of HC-DFIG controller parameters and the influence of controller parameter changes on DFIG stability under the constraints of multiple stability conditions,as well as the suitable range of power grid short-circuit ratio for HC-DFIG and CC-DFIG control strategies.The alternate switching between the two strategies was designed to improve the stability of DFIG grid connection.Finally,it is verified by simulation and experiment.
作者
谢震
许可宝
高翔
杨淑英
张兴
XIE Zhen;XU Kebao;GAO Xiang;YANG Shuying;ZHANG Xing(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,Anhui Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2022年第20期7426-7438,共13页
Proceedings of the CSEE
基金
国家自然科学基金项目(51877063)。
关键词
双馈风力发电机
混合控制型
D分割法
doubly-fed induction generator(DFIG)
hybrid control type
D division method
