Suzhou Electric Appliance Research Institute
期刊號: CN32-1800/TM| ISSN1007-3175

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一種采樣模型預測控制的動態(tài)電壓恢復器控制方法

來源:電工電氣發(fā)布時間:2023-04-01 08:01 瀏覽次數(shù):408

一種采樣模型預測控制的動態(tài)電壓恢復器控制方法

高嘉迪,何昊洋,俱世豪
(西安石油大學 電子工程學院,陜西 西安 710065)
 
    摘 要:針對目前動態(tài)電壓恢復器 (DVR) 多采用根據(jù)當前狀態(tài)做出未來動作的控制方法,從微觀上看總會因為采樣和反饋信息與控制動作之間存在時間延遲而產(chǎn)生誤差的問題,提出一種通過預測下一控制周期的輸出從而確定下一控制周期控制動作的閉環(huán)結(jié)構(gòu)的模型預測控制 (MPC) 方法。該方法基于前向歐拉法建立控制預測模型,通過反饋校正的方法減少預測誤差,并通過建立合適的目標函數(shù),確定應用于下一控制周期的最佳開關組合。利用 MATLAB/Simulink 軟件搭建所提控制方法的仿真模型,仿真結(jié)果表明,提出的 MPC 方法能有效減少 DVR 的補償誤差,具有響應速度快、諧波含量低、設計簡單等優(yōu)點。
    關鍵詞: 動態(tài)電壓恢復器;模型預測控制;反饋校正;最佳開關組合
    中圖分類號:TM714.2     文獻標識碼:A     文章編號:1007-3175(2023)03-0025-05
 
A Control Method of Dynamic Voltage Restorer Based on
Sampling Model Predictive Control
 
GAO Jia-di, HE Hao-yang, JU Shi-hao
(School of Electronic Engineering, Xi'an Shiyou University, Xi'an 710065, China)
 
    Abstract: The Dynamic Voltage Restorer (DVR) is now employing the control method of making future actions according to current states most of the time. Microscopically, errors always occur because of the time delay between samplings, feedback and control actions. Therefore,the paper puts forward a loop-locked Model Predictive Control (MPC) method which determines control actions of the next control cycle by predicting its outputs. The method builds a control predictive model on the basis of euler forward method. It can reduce prediction errors through feedback correction, and determine the optimal switch combination applied for the next control cycle by establishing the appropriate objective function. The simulation model of the proposed control method is established by MATLAB/Simulink, and the results show that the MPC method can effectively reduce the compensation error of DVR, and has the advantages of fast response, low harmonic content and simple design.
    Key words: dynamic voltage restorer; model predictive control; feedback correction; optimal switch combination
 
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