储能改进型Y源光伏逆变器的滑模控制策略  

Sliding mode control strategy of energy storage improved Y-source PV inverters

作　　者：孟令鹏 希望·阿不都瓦依提 吕海鹏 石存金 MENG Lingpeng;XIWANG Abuduwayiti;LV Haipeng;SHI Cunjin(School of Electrical Engineering,Xinjiang University,Urumqi Xinjiang 830047,China)

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830047

出　　处：《电源技术》2022年第4期445-450,共6页Chinese Journal of Power Sources

基　　金：国家自然科学基金(51367016);新疆重大科技专项项目(2016A02004-4)。

摘　　要：储能改进型Y源逆变器(energy storage improved Y-source inverter,ES-IYSI)具有右半平面零点和非线性特性,采用传统线性控制器会导致鲁棒性差、调节速度慢和控制器设计复杂等问题。提出在直流侧和交流侧分别使用滑模控制(sliding mode controller,SMC)以保证系统的鲁棒性,在单级变换系统中实现了对光伏输出、储能电池组和交流输出的三端功率控制。首先详细推导了ES-IYSI的大信号平均模型以及小信号扰动模型,得出了系统的传递函数。然后,以电感电流误差和电容电压误差作为状态变量设计直流侧SMC,同时以输出电流误差为状态变量设计交流侧SMC。与PI控制相比,所提出的双滑模控制具有鲁棒性强、响应速度快、并网电能质量高的优点。通过MATLAB/Simulink软件进行了仿真,仿真结果验证了双滑模控制算法的有效性。The energy storage improved Y-source inverter(ES-IYSI)has a right half-plane zero point and non-linear characteristics,which leads to poor robustness,slow regulation speed and complex controller design.We proposed to use a sliding mode controller(SMC)on the DC side and AC side respectively to ensure the robustness of the system,and realized the three-terminal energy control of the PV output,the storage battery pack and the AC output in a single-stage converter system.The large-signal averaging model and the small-signal disturbance model of ES-IYSI were first derived the transfer function of the system in detail.Then,the DC-side SMC was designed with inductor current error and capacitor voltage error as state variables,while the AC-side SMC was designed with output current error as state variables.Compared with PI control,the dual sliding mode control proposed in this paper has the advantages of robustness,fast response and high grid-connected power quality.The simulations were carried out by MATLAB/Simulink software,and the simulation results verify the effectiveness of the dual sliding mode control algorithm.

关 键 词：改进Y源变换器 滑模控制 非最小相位 光伏并网 小信号模型 

分 类 号：TM464[电气工程—电器]