發(fā)布時間：2018-08-30 17:47

【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(yīng)的控制策略進(jìn)行研究。詳細(xì)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(diǎn)配置的逆變器控制策略以實現(xiàn)系統(tǒng)極點(diǎn)的任意配置,從而抑制電網(wǎng)阻抗對系統(tǒng)電能質(zhì)量以及穩(wěn)定性的影響。最后建立系統(tǒng)仿真和實驗?zāi)Ｐ瓦M(jìn)行驗證。結(jié)果表明:電網(wǎng)阻抗易導(dǎo)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(zhì)量;所提出的極點(diǎn)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(xué)輸配電裝備及系統(tǒng)安全與新技術(shù)國家重點(diǎn)實驗室;中國電力科學(xué)研究院;
【基金】：國家自然科學(xué)基金(51477021) 國家高技術(shù)研究發(fā)展(863)計劃(2011AA05A301)
【分類號】：TM464
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本文編號：2213812