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基于改進的被動式多電平逆變器控制策略研究

來源：電工電氣發(fā)布時間：2022-03-24 15:24 瀏覽次數(shù)：427

基于改進的被動式多電平逆變器控制策略研究

肖龍

(中國民用航空西北地區(qū)空中交通管理局寧夏分局，寧夏銀川 750001)

摘要：傳統(tǒng)被動式控制技術因輸入中電壓環(huán)路的缺失而導致負載輸出存在穩(wěn)態(tài)誤差，提出了一種改進的被動式三相多電平逆變器控制技術。該方法是根據(jù)能量整形和阻尼注入完成的，目的是將逆變器的能量流調節(jié)到最優(yōu)水平并保證全局漸近穩(wěn)定性，給出了多電平電壓源型逆變器的拓撲結構和數(shù)學模型；根據(jù)能量函數(shù)進行能量整形和阻尼注入得到多電平 VSI 的開關函數(shù)來確保系統(tǒng)的穩(wěn)定運行；為消除負載的穩(wěn)態(tài)誤差將電壓回路引入開關函數(shù)進行線性規(guī)劃分析。通過 MATLAB/Simulink 仿真，仿真結果表明系統(tǒng)在任何負載的情況下都具有良好的瞬態(tài)響應和穩(wěn)態(tài)誤差，并且其 THD 值較低。

關鍵詞：電壓源型逆變器；被動式控制；開關函數(shù)；穩(wěn)態(tài)誤差；瞬態(tài)響應

中圖分類號：TM464 文獻標識碼：A 文章編號：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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基于改進的被動式多電平逆變器控制策略研究