考虑电网阻抗影响的LCL型并网逆变器控制策略
发布时间：2018-08-30 17:47
【摘要】：在考虑电网阻抗情况下对带LCL滤波器的三相光伏逆变器稳定性以及相应的控制策略进行研究。详细分析电网阻抗对并网光伏系统稳定性的影响,同时提出基于状态反馈极点配置的逆变器控制策略以实现系统极点的任意配置,从而抑制电网阻抗对系统电能质量以及稳定性的影响。最后建立系统仿真和实验模型进行验证。结果表明:电网阻抗易导致采用PR+HC控制器的光伏并网系统出现不稳定,降低系统并网电能质量;所提出的极点配置方法可有效抑制电网阻抗对系统稳定性影响。
[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.
【作者单位】： 重庆大学输配电装备及系统安全与新技术国家重点实验室;中国电力科学研究院;
【基金】：国家自然科学基金(51477021) 国家高技术研究发展(863)计划(2011AA05A301)
【分类号】：TM464
，
本文编号：2213812
[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.
【作者单位】： 重庆大学输配电装备及系统安全与新技术国家重点实验室;中国电力科学研究院;
【基金】：国家自然科学基金(51477021) 国家高技术研究发展(863)计划(2011AA05A301)
【分类号】：TM464
，
本文编号：2213812
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