發(fā)布時間：2018-07-29 15:14

【摘要】：當原有的戶用式光伏并網(wǎng)發(fā)電系統(tǒng)升級為家庭光儲系統(tǒng)時,單相光伏并網(wǎng)逆變器需在儲能電池等電壓源輸入條件下仍能正常并網(wǎng)運行。首先,建立了光伏陣列與鋰電池組等效電路數(shù)學(xué)模型,分析與驗證了在電壓源輸入條件下,兩級式單相系統(tǒng)的二次紋波污染比光伏陣列輸入條件下嚴重的現(xiàn)象。然后,通過分析兩級式單相系統(tǒng)中的交直流耦合機理與Boost電路數(shù)學(xué)模型的建立,提出一種電流雙反饋式紋波電流抑制措施。采取基于廣義三階積分的紋波提取與直流側(cè)中間電壓紋波的陷波抑制算法優(yōu)化系統(tǒng)并網(wǎng)運行控制,并利用MATLAB對控制系統(tǒng)進行仿真分析與計算。最后,搭建了5kW并網(wǎng)實驗系統(tǒng),通過實驗結(jié)果驗證了所提控制策略的有效性與實用性。
[Abstract]:When the original household photovoltaic grid-connected generation system is upgraded to the home optical storage system, the single-phase photovoltaic grid-connected inverter needs to operate normally under the condition of the input voltage source such as the energy storage cell. Firstly, the mathematical model of equivalent circuit of photovoltaic array and lithium battery pack is established, and the phenomenon that the secondary ripple pollution of two-stage single-phase system is more serious than that of photovoltaic array input condition is analyzed and verified under the condition of voltage source input. Then, by analyzing the mechanism of AC / DC coupling in two-stage single-phase system and the establishment of mathematical model of Boost circuit, a current dual-feedback ripple current suppression measure is proposed. The ripple extraction algorithm based on generalized third order integral and notch suppression algorithm of DC side intermediate voltage ripple are adopted to optimize the grid-connected operation control of the system, and the simulation analysis and calculation of the control system are carried out by using MATLAB. Finally, the 5kW grid-connected experimental system is built, and the effectiveness and practicability of the proposed control strategy are verified by the experimental results.
【作者單位】： 中南大學(xué)信息科學(xué)與工程學(xué)院;廣西大學(xué)電氣工程學(xué)院;
【基金】：國家高技術(shù)研究發(fā)展計劃(863計劃)資助項目(2012AA051601) 國家自然科學(xué)基金資助項目(61364007)~~
【分類號】：TM464;TM912

【參考文獻】

相關(guān)期刊論文 前10條

1 王守相;孫智卿;劉U，

本文編號：2153087