【摘要】：直流微電網帶動單相交流逆變負載時,直流電壓會產生2倍頻的周期波動,進而造成聯(lián)網的光伏發(fā)電系統(tǒng)輸出功率產生周期波動,無法持續(xù)處于最大功率輸出點,從而間接降低了其發(fā)電效率。為解決上述問題,在分析直流電壓周期擾動時的光伏發(fā)電系統(tǒng)輸出功率特性的基礎上,提出了光伏發(fā)電系統(tǒng)輸出電流的比例-積分-諧振控制策略,比例-積分調節(jié)器用于電流的穩(wěn)態(tài)無靜差控制,而諧振控制器用于抑制周期擾動。詳細分析了所提出方法的穩(wěn)態(tài)誤差、穩(wěn)定性,各控制參數變化對電流控制性能以及直流電壓波動抑制效果的影響,給出了各參數選取原則。仿真和實驗結果驗證了理論分析結果與所提出方法的正確性和可行性。
[Abstract]:When DC microgrid drives single-phase AC inverter load, DC voltage will produce periodic fluctuation of double frequency, which will result in periodic fluctuation of output power of connected photovoltaic power system, which can not be sustained at the maximum power output point. Thus, the efficiency of power generation is reduced indirectly. In order to solve the above problems, based on the analysis of the output power characteristics of photovoltaic power system under the periodic disturbance of DC voltage, a proportional integral-resonant control strategy is proposed for the output current of photovoltaic power generation system. The proportional-integral regulator is used for steady-state static error control of current, while the resonant controller is used to suppress periodic disturbance. The effects of the steady-state error, the stability, the variation of control parameters on the current control performance and the suppression effect of DC voltage fluctuation are analyzed in detail. The selection principle of each parameter is given. The simulation and experimental results verify the correctness and feasibility of the theoretical analysis and the proposed method.
【作者單位】： 哈爾濱工業(yè)大學電氣工程及自動化學院;天津工業(yè)大學電氣工程與自動化學院;
【基金】：國家自然科學基金項目(51107018) 高等學校博士學科點專項科研基金項目(20102302120013) 黑龍江省博士后科研啟動金資助項目(LBH-Q11109)~~
【分類號】：TM615.2

【參考文獻】

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