一种减少功率器件数量的新型15电平逆变器预测控制策略

摘要

本文提出一种由模型预测控制（MPC）驱动的新型15电平H-PTC逆变器拓扑，可显著减少器件数量。该设计仅采用两个直流源、九只开关（其中含一只双向开关）与一个电容。本文通过MATLAB/Simulink仿真，在稳态运行、负载变化、非线性负载与供电电压突变等多种工况下验证了系统性能。与现有拓扑相比，所提逆变器具有硬件结构简单、输出质量高、动态鲁棒性强等优点。尤为突出的是，其总承受电压（TSV）极低，代价函数值最小，仅为2.05。在R=20 Ω、L=20 mH的负载条件下，负载电流的总谐波畸变率（THD）为0.88%，表明无需输出滤波器即可获得优异的电能质量。MPC控制器确保了快速的动态响应与较强的适应能力，使该拓扑非常适用于现代能量变换应用。

Abstract

This paper proposes a novel fifteen-level H-PTC inverter topology controlled by model predictive control (MPC), which reduces the number of components. The design employs only two DC sources, nine switches, including one bidirectional switch, and a single capacitor. The system's performance is validated through MATLAB/Simulink simulations under various scenarios, such as steady-state operation, load variations, nonlinear loads, and sudden supply voltage disturbances. Compared to existing topologies, the proposed inverter demonstrates hardware simplicity, high output quality, and enhanced dynamic robustness. Notably, it features very low total standing voltage (TSV) and a minimized cost function value of 2.05. For a load characterized by R = 20 Ω and L = 20 mH, the total harmonic distortion (THD) of the load current is 0.88%, confirming excellent power quality without the need for output filters. The MPC controller ensures a fast dynamic response and strong adaptability, making this topology ideal for modern energy conversion applications.