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新型MPPT算法在两级式光伏并网系统中的应用 被引量:1

Application of the novel MPPT algorithm in the two-stage gridconnected photovoltaic system
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摘要 以光伏发电系统为研究对象,分别结合相应的控制算法建立了一种带有最大功率点跟踪(MPPT)功能的光伏并网系统,并利用Matlab软件进行了仿真。仿真结果表明,前级Boost电路基于新型算法——变步长扰动观察法实现了最大功率点跟踪的功能;后级逆变电路采用电压外环、电流内环的双闭环控制方式,使逆变器的输出能准确、快速地跟踪电网电压变化,并与电网电压保持同频、同相。该系统的输出为纹波较少的正弦波形,功率因数接近于1,可满足光伏并网对逆变器的要求。
机构地区 西安科技大学
出处 《可再生能源》 CAS 北大核心 2012年第5期109-112,共4页 Renewable Energy Resources
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