双馈风电机组dc-link电压的直接电容电流控制策略  

Direct capacitance current control strategy of dc-link voltage for doubly-fed wind power generation

作　　者：高仕红 崔佳咪 胡唐超 GAO Shihong;CUI Jiami;HU Tangchao(School of Information Engineering,Hubei University for Nationalities,Enshi 445000,China)

机构地区：[1]湖北民族大学信息工程学院,湖北恩施445000

出　　处：《电力系统保护与控制》2019年第8期152-158,共7页Power System Protection and Control

基　　金：湖北省自然科学基金项目资助(2011CDC016)~~

摘　　要：传统GSC双闭环控制中存在电压外环对dc-link电压波动抑制响应慢及电流内环对前馈补偿延时的问题。对此提出一个dc-link电容电流直接控制的GSC单闭环控制策略。控制策略中引入的前馈补偿直接施加在GSC控制电压的节点上,消除了电流内环对扰动前馈补偿的延时。同时,对外界扰动动态的前馈补偿采用了一个"跟踪-微分器"技术。在Matlab/Simulink仿真平台中构建了GSC控制策略的研究模型,研究了两种典型情况下GSC控制策略对dc-link电压波动抑制的效果。结果表明所提出的GSC控制策略能有效抑制dc-link电压的波动幅值及振荡。In the conventional double closed loop control of GSC, there exists the following problems: the outer voltage loop has a slow response to the suppression of dc-link voltage fluctuation, and the inner current loop has a delay to the feed-forward compensation. So, a single closed loop control strategy of GSC is proposed, which directly controls the capacitance current of dc-link capacitor. The feed-forward compensation item introduced in the control strategy is directly applied to the control voltage node of GSC, which eliminates the delay of inner current loop to disturbance feed-forward compensation. Meanwhile, using a "tracking-differentiator" technique is to implement the feed-forward compensation of external disturbance dynamic. In the Matlab/Simulink simulation platform, the research model of GSC control strategy is constructed, and the effect of GSC control strategy on the suppression of dc-link voltage fluctuation in two typical cases is investigated. The results show that the GSC control strategy proposed in this paper can effectively suppress the fluctuation amplitude and oscillation of dc-link voltage.

关 键 词：双馈风力发电机组 网侧变流器 dc-link电压 跟踪-微分器 前馈补偿 

分 类 号：TM315[电气工程—电机]