双馈风力发电机网侧变换器的非线性控制策略研究  

Research on Nonlinear Control Scheme of Grid Side Converter for Doubly Fed Induction Generator

作　　者：裴泽伟 朱佳兵 吴文超 刘玉帅 PEI Zewei;ZHU Jiabing;WU Wenchao;LIU Yushuai(National Energy Group Dongtai Offshore Wind Power Co.,Ltd.,Dongtai Jiangsu 224200,China;Zhejiang Huadong Surveying,and Security Technology Co.,Ltd.,Hangzhou 310014,China)

机构地区：[1]国家能源集团东台海上风电有限责任公司,江苏东台224200 [2]浙江华东测绘与工程安全技术有限公司,杭州310014

出　　处：《微电机》2022年第10期70-75,共6页Micromotors

基　　金：国家科技项目(51220118004W)。

摘　　要：为了提升双馈感应发电机(DFIG)网侧变换器的动态性能,提出了一种二阶滑模非线性控制方案,可有效地提升DFIG的直流侧电压与网侧电流的动态响应。传统的DFIG的网侧变换器的通常采用直流电压外环网侧电流内环的双闭环控制方案,直流电压外环和网侧电流内环均采用比例积分控制方案。而在实际工况中,直流侧电容器电容可能会随环境改变而改变,并且DFIG系统的输出功率也和风速息息相关。因此,为了提升网侧变换器的鲁棒性,本研究针对DFIG的网侧变换器的直流电压外环,设计了一种二阶滑模非线性控制方案来替代传统的PI控制。最后,Matlab/Simulink仿真结果验证了所提的二阶滑模非线性控制的鲁棒性。To improve the dynamic performance of the grid side converter for the doubly fed induction generator(DFIG),a second-order sliding mode control scheme was presented,where the dynamic response of the DC-link volage and grid current were improved.In general,the dual closed-loop scheme was adopted for the grid side converter,where both the outer DC-link voltage loop and inner grid current loop adopt the proportional integral(PI) control scheme.However,in reality,not only the capacitance value of the DC-link capacitor changes when the external environment changes,but also the power generation of the DFIG was closely related to the wind velocity.Thus,to improve the robustness of the grid current,this study proposed a second-order sliding mode nonlinear control scheme for the outer DC-link voltage loop,where the conventional PI control was replaced.Finally,the Matlab/Simulink simulation results have verified the robustness of the proposed second-order sliding mode nonlinear control scheme.

关 键 词：双馈风力发电系统 网侧变换器 非线性控制 二阶滑模控制 

分 类 号：TM315[电气工程—电机] TP273[自动化与计算机技术—检测技术与自动化装置]