基于储能型开关电感准Z源逆变器的模型预测控制

针对传统准Z源逆变器(quasi-Z-Source Inverter，QZSI)升压能力和功率协调控制能力的不足，本文提出将储能电池与开关电感型QZSI相结合构成储能型开关电感QZSI(Energy-Storage Switched-Inductor QZSI，ES-SLQZSI)，提高了系统升压倍数和功率协调能力，并针对ES-SLQZSI系统，提出一种基于有限集模型预测控制(Finite Control Set-Model Predictive Control，FCS-MPC)结构的功率控制策略，在单级变换系统中实现了最大功率点追踪(MPPT)和并网功率控制。建立了ES-SLQZSI的离散时间模型，基于此模型设计预测函数与代价函数。然后，设计光伏功率MPPT模块和输出功率管理模块。相比于传统多级结构的储能光伏系统，该系统结构简单，无需额外的DC-DC变换器；相比于传统双环PI PWM控制策略，该方法简单易行，所需PI控制器少，无需PWM调制器；动态响应速度优良，适合被控变量较多的非线性系统。仿真结果验证了控制策略的有效性。

Model Predictive Control of Energy-storage Switched-inductor Quasi-Z-source Inverter

To overcome the shortcomings of traditional quasi-Z-source inverters(QZSI) in boost capability and power coordination control capability, this paper proposes an Energy-Storage Switched-Inductor QZSI(ES-SLQZSI) which combines energy storage battery and switching inductor QZSI, improves the boost ratio and power coordination capability of the system. An ES-SLQZSI power control strategy based on Finite Control Set-Model Predictive Control(FCS-MPC) is proposed in this paper. Maximum Power Point Tracking (MPPT) and Output Power were controled in Single-stage Conversion System. Firstly, the predictive function and cost function of the controller are designed based on the discrete-time model of ES-SLQZSI system. Then, the photovoltaic power MPPT module and the output power management module are designed to decouple with the cost function. Finally, the proposed control algorithm is verified by simulation. The method is simple to implement and has good dynamic performance without PWM modulator.