| 引用本文: | 郭 镥,罗 安,黎 燕,彭双剑.新型光伏逆变器及其前馈功率预测控制[J].电力自动化设备,2013,33(6): |
| GUO Lu,LUO An,LI Yan,PENG Shuangjian.New photovoltaic inverter and its feedforward power predictive control[J].Electric Power Automation Equipment,2013,33(6): |
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| 摘要: |
| 提出了一种新型光伏逆变器拓扑结构，其由罗氏升压电路、三相四开关逆变单元组成，可以有效提高光伏发电效率、降低光伏系统成本。针对该结构逆变器提出了一种新型前馈功率预测控制策略，其通过将自然环境分区后排列，然后逐一对其历史光伏最大功率进行寻优，从而确定相应的前馈功率预测值。该方法具有计算量小、运算速度快、实现简单、控制精度高、可靠性强的显著优点，可以省去传统逆变器控制的直流侧电压闭环，由逆变器本身完成光伏阵列的最大功率点跟踪功能，从而提高系统响应速度与可靠性。仿真与实验结果均验证了所提结构和控制方法的可行性及优越性。 |
| 关键词: 光伏 逆变器 罗氏升压电路 三相四开关单元 前馈 预测 |
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| 基金项目:国家重点基础研究发展计划（973计划）资助项目（2009CB219706）；中国与欧洲政府间国际合作计划项目（2010DFA61640） |
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| New photovoltaic inverter and its feedforward power predictive control |
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GUO Lu1, LUO An1, LI Yan1,2, PENG Shuangjian1
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1.Hunan University，Changsha 410082，China;2.Central South University，Changsha 410075，China
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| Abstract: |
| The topology of a new-kind photovoltaic inverter is proposed to effectively improve the efficiency of photovoltaic power generation and reduce the cost of photovoltaic system，which consists of Luo-Boost circuit and three-phase four-switch units. A new strategy of feedforward power predictive control is brought forward for it，which partitions the natural environment conditions and searches one by one the optimal historical photovoltaic power to determine the corresponding predictions of feedforward power. With small calculation load，fast calculation speed，simple implementation，high control precision and excellent reliability，the new control strategy removes the DC-voltage close-loop control used in traditional inverter and realizes the MPPT function by inverter itself，which enhances the system response and reliability. Simulative and experimental results show the proposed topology and strategy feasible and superior. |
| Key words: photovoltaic electric inverters Luo-Boost circuit three-phase four-switch unit feedforward control forecasting |
