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期刊號(hào): CN32-1800/TM| ISSN1007-3175

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基于KMTOA的三相光伏逆變器雙環(huán)控制研究

來(lái)源:電工電氣發(fā)布時(shí)間:2018-08-16 13:16 瀏覽次數(shù):734
基于KMTOA的三相光伏逆變器雙環(huán)控制研究
 
吳靜平1,何浪1,王根平2
(1 湘潭大學(xué) 湖南省“風(fēng)電裝備與電能變換”2011協(xié)同創(chuàng)新中心,湖南 湘潭 411105;2 深圳職業(yè)技術(shù)學(xué)院,廣東 深圳 518000)
 
    摘 要:以離網(wǎng)三相光伏逆變器為研究對(duì)象, 選擇電壓電流雙閉環(huán)控制作為其控制策略,針對(duì)傳統(tǒng)PI控制參數(shù)難整定、系統(tǒng)變化適應(yīng)性差的問(wèn)題,引入了分子動(dòng)理論優(yōu)化算法來(lái)辨識(shí)雙閉環(huán)控制器的PI參數(shù),實(shí)現(xiàn)動(dòng)態(tài)優(yōu)化。基于MATLAB平臺(tái)的仿真實(shí)驗(yàn)結(jié)果表明:相比于傳統(tǒng)的PI 控制以及PSO和GA算法兩種智能算法,該算法具有操作簡(jiǎn)便、超調(diào)量小、響應(yīng)快、適應(yīng)性強(qiáng)等特點(diǎn);系統(tǒng)輸出的電壓、電流波形呈現(xiàn)良好的正弦特性,總諧波畸變率小,有效改善了逆變器的動(dòng)態(tài)性能及其輸出電壓的質(zhì)量。
    關(guān)鍵詞:三相光伏逆變器;雙閉環(huán)PI 控制;分子動(dòng)理論優(yōu)化算法;辨識(shí)參數(shù)
    中圖分類號(hào):TM464     文獻(xiàn)標(biāo)識(shí)碼:A     文章編號(hào):1007-3175(2018)08-0014-06
 
Research of Double Closed Loop PI Controller Based on
KMTOA for Three-Phase Photovoltaic Inverter
 
WU Jing-ping1, HE Lang1, WANG Gen-ping2
(1 Hunan Province Cooperative Innovation Center for Wind Power Equipment and Energy Conversion,
Xiangtan University, Xiangtan 4111 05, China; 2 Shenzhen Polytechnic, Shenzhen 518000, China)
 
    Abstract: The three-phase photovoltaic inverter is used as the research object and the voltage and current double closed loop control was selected as its control strategy. Aiming at the problem that the traditional PI control parameters were difficult to be adjusted and the system variation was poor, kinetic molecular theory optimization algorithm was introduced to identify the PI parameters of double closed loop controller to realize dynamic optimization. The result of simulation experiment in MATLAB shows that compared with the traditional PI controller, the particle swarm optimization (PSO) and GA algorithms have many advantages, such as simple operation, small overshoot, fast response, strong adaptability and so on. The system output voltage and current waveform has a good sinusoidal characteristic, and the total harmonic distortion (THD) is smaller, which can improve the dynamic performance and the quality of output voltage in inverter effectively.
    Key words: three-phase photovoltaic inverter; double closed loop PI control; kinetic molecular theory optimization algorithm; parameter identification
 
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