一种改进的电导增量法的MPPT实现策略
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摘要
分析了传统的电导增量法在光伏MPPT中的原理,并针对光照骤变下而引起光伏输出功率及光伏内阻同时发生骤变这一状况,导致了随后的最大功率追踪发生了较大的振荡,而以往的MPPT技术关注于条件骤变后的跟踪速度的改进,因此提出了一种新的改进方法,即通过及时地对Boost电路的占空比信号D进行相应的补偿。仿真结果表明,该方法可以显著改善振荡同时加快跟踪速度。
Based on analyzing the principle of the traditional incremental conductance method used in PV cells' maximum power point tracking and concerning the reason of the oscillation of maximum power point under changing illumination leading the changing of PV output and the PV internal resistance, a new improved method different from the past MPPT focused on improving tracking speed was proposed and certain compensation in time was added through adjusting the duty ratio of the Boost circuit. The simulation results show that the method can improve oscillation and accelerate tracking speed.
Based on analyzing the principle of the traditional incremental conductance method used in PV cells' maximum power point tracking and concerning the reason of the oscillation of maximum power point under changing illumination leading the changing of PV output and the PV internal resistance, a new improved method different from the past MPPT focused on improving tracking speed was proposed and certain compensation in time was added through adjusting the duty ratio of the Boost circuit. The simulation results show that the method can improve oscillation and accelerate tracking speed.
引文
[1]张林,郭前岗,周西峰.一种新型光伏系统MPPT变步长滞环比较P&O法[J].电测与仪表,2014,51(2):27-31.
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[7]刘家赢.一种改进的变步长电导增量法在光伏MPPT中的应用[J].电力系统,2014,33(13):23-27.
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[9]傅望,周林,郭珂.光伏电池工程用数学模型研究[J].电工技术学报,2011,26(10):211-216.
[10]皇金锋,刘树林.Boost变换器的参数选择与非最小相位分析[J].电机与控制学报,2014,18(7):51-59.
[11]王亚楠,杨旭红,王军成,等.一种新型变步长光伏最大功率点跟踪控制策略[J].电气传动,2015,45(1):54-57.
[2]刘萌,王印松,宋雨倩.基于模型参考电导增量法的光伏电池MPPT控制[J].电力科学与工程,2013,29(1):16-20.
[3]梁惺彦,张蔚.基于B P神经网络光伏发电系统MPPT的研究[J].制造业自动化,2012,34(12):112-130.
[4]尤鋆,郑建勇.基于模糊PI调节Boost电路的光伏系统最大功率点跟踪控制[J].电力自动化设备,2012,32(6):94-98.
[5]张淼,吴捷.滑模技术在PV最大功率追踪系统中的应用[J].电工技术学报,2005,20(3):90-93.
[6]汤济泽,王丛岭,房学法.一种基于电导增量法的MPPT实现策略[J].电力电子技术,2011,45(4):73-75.
[7]刘家赢.一种改进的变步长电导增量法在光伏MPPT中的应用[J].电力系统,2014,33(13):23-27.
[8]杨秀,臧海洋,舒海莲.基于Boost电路的PV最大功率点追踪仿真[J].上海电力学院学报,2010,26(6):591-596.
[9]傅望,周林,郭珂.光伏电池工程用数学模型研究[J].电工技术学报,2011,26(10):211-216.
[10]皇金锋,刘树林.Boost变换器的参数选择与非最小相位分析[J].电机与控制学报,2014,18(7):51-59.
[11]王亚楠,杨旭红,王军成,等.一种新型变步长光伏最大功率点跟踪控制策略[J].电气传动,2015,45(1):54-57.