【摘要】：在考慮電網(wǎng)阻抗情況下對帶LCL濾波器的三相光伏逆變器穩(wěn)定性以及相應的控制策略進行研究。詳細分析電網(wǎng)阻抗對并網(wǎng)光伏系統(tǒng)穩(wěn)定性的影響,同時提出基于狀態(tài)反饋極點配置的逆變器控制策略以實現(xiàn)系統(tǒng)極點的任意配置,從而抑制電網(wǎng)阻抗對系統(tǒng)電能質量以及穩(wěn)定性的影響。最后建立系統(tǒng)仿真和實驗模型進行驗證。結果表明:電網(wǎng)阻抗易導致采用PR+HC控制器的光伏并網(wǎng)系統(tǒng)出現(xiàn)不穩(wěn)定,降低系統(tǒng)并網(wǎng)電能質量;所提出的極點配置方法可有效抑制電網(wǎng)阻抗對系統(tǒng)穩(wěn)定性影響。
[Abstract]:The stability and control strategy of three-phase photovoltaic inverter with LCL filter are studied. The influence of grid impedance on the stability of grid-connected photovoltaic system is analyzed in detail. At the same time, an inverter control strategy based on state-feedback pole assignment is proposed to realize arbitrary pole assignment. Therefore, the influence of grid impedance on the power quality and stability of the system is restrained. Finally, the system simulation and experimental model are established to verify. The results show that the impedance of the grid easily leads to the instability of the photovoltaic grid-connected system using PR HC controller and reduces the power quality of the grid-connected system, and the proposed pole assignment method can effectively restrain the influence of the grid impedance on the stability of the system.
【作者單位】： 重慶大學輸配電裝備及系統(tǒng)安全與新技術國家重點實驗室;中國電力科學研究院;
【基金】：國家自然科學基金(51477021) 國家高技術研究發(fā)展(863)計劃(2011AA05A301)
【分類號】：TM464
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本文編號：2213812