基于LADRC和准PR控制的风电并网逆变器控制策略  

Wind Power Grid-connected Inverter Control Strategy Based on LADRC and Quasi-PR Control

作　　者：冉华军[1] 王新权 王灿 罗娇娇 李敖 RAN Huajun;WANG Xinquan;WANG Can;LUO Jiaojiao;LI Ao(College of Electrical Engineering and New Energy,China Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002

出　　处：《三峡大学学报（自然科学版）》2024年第5期76-84,共9页Journal of China Three Gorges University：Natural Sciences

基　　金：国家自然科学基金项目(52107108)。

摘　　要：为了稳定风电并网逆变器直流母线电压的波动,提高其动态响应速度并减少并网电流中的谐波含量,本文提出了LADRC+准PR双环控制策略.首先根据两电平风电并网逆变器的拓扑结构建立其数学模型;然后,根据数学模型设计电压外环二阶LADRC控制器和电流内环准PR控制器代替传统的PI控制器,同时对两种控制器的参数进行了设计并整定;最后,在Matlab软件中构建仿真模型,进行了仿真分析和波形对比.结果表明:相较于传统的双闭环PI控制策略,新型控制策略不仅能够快速地稳定直流母线电压,而且交流侧电流的总谐波失真小;并且在电网电压发生扰动的工况下,仍有较好的控制性能.综上所述,基于LADRC和准PR控制的风电并网逆变器控制策略具有较好的抗扰性和优越的鲁棒性.In order to stabilize the fluctuation of the DC bus voltage in the wind power grid-connected inverter,improve its dynamic response speed and reduce the harmonic content in the grid-connected current,a LADRC+quasi-PR double-loop control strategy is proposed in this paper.Firstly,the mathematical model of the two-level wind power grid-connected inverter is established according to its topology.Secondly,the controller of voltage outer-loop second-order LADRC and the controller of current inner-loop quasi-PR are designed according to the mathematical model instead of the traditional PI controller.Meanwhile,the parameters of the two controllers are designed and tuned.Finally,the simulation model is constructed in MATLAB software,and the simulation analysis and waveform comparison are carried out.The results show that the new control strategy can not only quickly stabilize the DC bus voltage,but also the total harmonic distortion of the AC side current is small,compared with the traditional double-closed-loop PI control strategy.Moreover,it still has better control performance under the condition of grid voltage disturbance.In summary,the control strategy of wind power grid-connected inverter based on LADRC and quasi-PR control has better immunity and superior robustness.

关 键 词：风电并网逆变器 线性自抗扰控制 准比例谐振控制 谐波抑制 

分 类 号：TM464[电气工程—电器]