發(fā)布時(shí)間：2019-07-26 16:01

【摘要】：為探究一種新型的自適應(yīng)最大功率跟蹤算法,提出了基于AVR單片機(jī)的光伏水泵系統(tǒng)控制結(jié)構(gòu).將遺傳算法與占空比擾動(dòng)觀察法(PO)相結(jié)合,根據(jù)遺傳算法的原理計(jì)算推導(dǎo)出DCAC變換器的占空比,可以實(shí)現(xiàn)快速搜索到光伏水泵系統(tǒng)的最大功率跟蹤點(diǎn),以克服外界環(huán)境的劇烈變化對控制器造成的干擾.通過Simulink環(huán)境下的仿真試驗(yàn),驗(yàn)證了基于遺傳算法實(shí)現(xiàn)的MPPT方法具有良好的自適應(yīng)性以及穩(wěn)定性.在光伏水泵系統(tǒng)的試驗(yàn)平臺(tái)上進(jìn)行相關(guān)的抽水試驗(yàn),結(jié)果表明:建立于遺傳算法進(jìn)而實(shí)現(xiàn)MPPT算法而設(shè)計(jì)的系統(tǒng),對于外界不斷的氣候變化,該光伏水泵系統(tǒng)都可以較好地應(yīng)對,綜合效率基本穩(wěn)定在60%以上.所開發(fā)的系統(tǒng)可以實(shí)現(xiàn)對水泵負(fù)載的可靠控制,系統(tǒng)工作穩(wěn)定,整體效率較高,為光伏水泵系統(tǒng)的優(yōu)化控制提供了參考.
[Abstract]:In order to explore a new adaptive maximum power tracking algorithm, a photovoltaic water pump system control structure based on AVR single chip microcomputer is proposed. Combining genetic algorithm with duty cycle disturbance observation method (PO), the duty cycle of DCAC converter is calculated and deduced according to the principle of genetic algorithm, which can quickly search the maximum power tracking point of photovoltaic water pump system in order to overcome the interference caused by the drastic change of external environment to the controller. The simulation results in Simulink environment show that the MPPT method based on genetic algorithm has good adaptability and stability. The related pumping experiments are carried out on the test platform of photovoltaic water pump system. The results show that the system designed by genetic algorithm and then MPPT algorithm can deal with the continuous climate change of the outside world, and the comprehensive efficiency is basically stable above 60%. The developed system can realize reliable control of pump load, stable operation and high overall efficiency, which provides a reference for optimal control of photovoltaic water pump system.
【作者單位】： 江蘇大學(xué)農(nóng)業(yè)裝備工程學(xué)院;江蘇大學(xué)能源與動(dòng)力工程學(xué)院;
【基金】：江蘇省2014年度普通高校研究生實(shí)踐創(chuàng)新計(jì)劃項(xiàng)目(SJZZ_0134)
【分類號】：TH38
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本文編號：2519652