風光互補發(fā)電系統(tǒng)MPPT及其逆變電源控制的研究
葛超銘,李少綱
福州大學 電氣工程與自動化學院,福建 福州 350108
摘 要:為了實現(xiàn)風光互補發(fā)電系統(tǒng)的最大功率點跟蹤(MPPT),根據(jù)風能與太陽能的特性,采用雙輸DC/DC變換器作為前級電路,在擾動法的基礎上提出自調整MPPT控制策略,有效改善了系統(tǒng)的跟蹤速度,避免誤操作,減小工作點的震蕩,并提高了系統(tǒng)效率。針對逆變電源控制,把自動調節(jié)反饋系數(shù)的PID控制系統(tǒng)與重復控制系統(tǒng)相結合,不僅提出復合控制算法,使系統(tǒng)具有較好的動靜態(tài)特性,且改善了逆變器輸出波形的質量。
關鍵詞:風光互補;最大功率點跟蹤;逆變電源;復合控制
中圖分類號:TM614;TM615 文獻標識碼:A 文章編號:1007-3175(2013)02-0006-04
Study on Maximum Power Point Tracking and Inverter Control of Hybrid Photovoltaic-Wind Power Generation System
GE Chao-ming, LI Shao-gang
College of Electric Engineering and Automation, Fuzhou University, Fuzhou 350108, China
Abstract: In order to realize maximum power point tracking (MPPT) of hybrid photovoltaic-wind power generation system, dual input DC/DC converter was adopted as the forward circuit according to features of wind energy and solar energy. On the basis of disturbance method, the self-adjusting MPPT control strategy was raised to have effectively improved tracking speed of the system, avoiding misoperation, reducing vibration of working point and raising the system efficiency. As for inverter control, the PID control system for auto-adjusting feeding coefficient was combined with the repetitive control system. This paper not only raised the repetitive control algorithm, making the system have better static and dynamic characteristics, but also improved quality of inverter output waveforms.
Key words: hybrid photovoltaic-wind; maximum power point tracking; inverter; repetitive control
參考文獻
[1] 徐鵬威,劉飛,劉邦銀,等.幾種光伏系統(tǒng)MPPT方法的分析比較及改進[J].電力電子技術,2007,41(5):3-5.
[2] 王豐收,沈傳文,孟永慶.基于MPPT算法的風力永磁發(fā)電系統(tǒng)的仿真研究[J].電氣傳動,2007,37(1):6-10.
[3] 王兆安,張明勛.電力電子設備設計和應用手冊[K].北京:機械工業(yè)出版社,2002.
[4] 熊蕊,朱秋花,王國鋒.SPWM逆變電源輸出電壓波形重復控制技術的研究[J].電力電子技術,2001,35(2):45-47.
[5] 吳忠強,王子洋,鄔偉揚.基于模糊自整定PI和重復控制的單相SPWM逆變電源研究[J].電氣傳動,2005,35(7):39-42.
[6] 王雪丹,任繼偉,張曉曦.復合控制算法在逆變器中的應用[J].哈爾濱理工大學學報,2009,14(4):99-102.
[7] 於鋒,胡國文.采用雙輸入兩級式風光互補發(fā)電的并網(wǎng)技術[J].電力電子技術,2011,45(5):10-12.