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期刊號(hào): CN32-1800/TM| ISSN1007-3175

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基于H∞重復(fù)控制的T型三電平逆變器諧波抑制策略

來源:電工電氣發(fā)布時(shí)間:2021-05-25 15:25 瀏覽次數(shù):579

基于H重復(fù)控制的T型三電平逆變器諧波抑制策略

張成1,趙濤2,朱愛華1,徐宏健1
(1 南京工程學(xué)院 電力工程學(xué)院,江蘇 南京 211167;
2 南京工程學(xué)院 自動(dòng)化學(xué)院,江蘇 南京 211167)
 
    摘 要:逆變器在變流的同時(shí),也能提升并網(wǎng)的電能質(zhì)量。通過對(duì)并網(wǎng)逆變器諧波來源的分析,針對(duì)其自身的諧波和本地負(fù)載諧波,提出了一種應(yīng)用于 T 型三電平逆變器的 H∞ 重復(fù)控制策略。以 T 型三電平逆變器為研究對(duì)象,建立狀態(tài)空間模型,設(shè)計(jì) H∞ 重復(fù)控制電流內(nèi)環(huán)控制器,分析系統(tǒng)穩(wěn)定性,研究T型逆變器在 H∞ 重復(fù)控制策略下對(duì)并網(wǎng)電流諧波的抑制能力以及對(duì)負(fù)載諧波的補(bǔ)償能力。在 Simulink 軟件中搭建仿真模型,對(duì)所提控制策略進(jìn)行驗(yàn)證,結(jié)果表明所提出的策略能夠?qū)崿F(xiàn)對(duì)諧波的有效抑制,提升電能質(zhì)量。
    關(guān)鍵詞:H∞ 重復(fù)控制;T 型三電平逆變器;諧波
    中圖分類號(hào):TM464     文獻(xiàn)標(biāo)識(shí)碼:A     文章編號(hào):1007-3175(2021)05-0001-06
 
Strategy for Harmonic Suppression of T-Type Three-Level
Inverter Based on H∞ Repetitive Control
 
ZHANG Cheng1, ZHAO Tao2, ZHU Ai-hua1, XU Hong-jian1
(1 School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, China;
2 School of Automation, Nanjing Institute of Technology, Nanjing 211167, China)
 
    Abstract: Inverter can improve the power quality of grid connection while converting. This paper makes analysis of the harmonic source of the grid-connected inverter, and puts forward a H repetitive control strategy that is applied to the T-type three-level inverter according to harmonic and local load harmonic of the grid-connected inverter itself. In order to make research on the ability of T-type inverter to suppress grid-connected current harmonic and to compensate for load harmonic, this paper, taking T-type three-level inverter as the research object,builds a state-space model and designs the H repetitive control inner-loop controller to analyze stability of the system. A simulation model is built in Simulink to verify the control strategy, and the results show that it is able to suppress harmonic efficiently to improve power quality.
    Key words: H repetitive control; T-type three-level inverter; harmonic
 
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