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基于改进的被动式多电平逆变器控制策略研究

来源：电工电气发布时间：2022-03-24 15:24 浏览次数：443

基于改进的被动式多电平逆变器控制策略研究

肖龙

(中国民用航空西北地区空中交通管理局宁夏分局，宁夏银川 750001)

摘要：传统被动式控制技术因输入中电压环路的缺失而导致负载输出存在稳态误差，提出了一种改进的被动式三相多电平逆变器控制技术。该方法是根据能量整形和阻尼注入完成的，目的是将逆变器的能量流调节到最优水平并保证全局渐近稳定性，给出了多电平电压源型逆变器的拓扑结构和数学模型；根据能量函数进行能量整形和阻尼注入得到多电平 VSI 的开关函数来确保系统的稳定运行；为消除负载的稳态误差将电压回路引入开关函数进行线性规划分析。通过 MATLAB/Simulink 仿真，仿真结果表明系统在任何负载的情况下都具有良好的瞬态响应和稳态误差，并且其 THD 值较低。

关键词：电压源型逆变器；被动式控制；开关函数；稳态误差；瞬态响应

中图分类号：TM464 文献标识码：A 文章编号：1007-3175(2022)03-0027-06

Research on Control Strategy Based on Improved

Passive Multilevel Inverter

XIAO Long

（Civil Aviation Air Traffic Management Bureau of Ningxia Branch of CAAC Northwest Regional, Yinchuan 750001, China）

Abstract: The traditional passive control technology has a steady-state error in the load output due to the lack of a voltage loop in the input. This paper proposed an improved passive three-phase multilevel inverter control technology.This method is based on energy shaping and damping injection. The purpose is to adjust the energy flow of the inverter to the optimal level and ensure global asymptotic stability.It provided the topological structure and mathematical model of the multilevel voltage source inverter. It performed the energy shaping and damping injection according to the energy function and obtained the switching function of the multilevel VSI. In this way, it could ensure the stable operation of the system. This study also introduced the voltage loop into the switching function for linear programming analysis,eliminating the steady-state error of the load.The MATLAB/Simulink simulation experiment results show that the system has a good transient response and steady-state error under any load, and its THD value is low.

Key words: voltage source inverter; passive control; switching function; steady-state error; transient response

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基于改进的被动式多电平逆变器控制策略研究