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Design and Control of DC-DC Grid-Connected Converter for Photovoltaic Power

机译：光伏电网DC-DC电网连接转换器的设计与控制

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Due to benefits of fewer equipment, higher efficiency and less grid constraints, the demand of PV directly integrating into HVDC is arising and the study on DC/DC converter for PV is in need. In this paper, DC/DC converter topology interfaced into DC grid is reviewed, and a topology based on Boost-Full-Bridge-Isolated (BFBIC) and the architecture of modular Input-Parallel-Output-Serial are proposed. Soft switching characteristic of BFBIC is studied and a zero-voltage-switch (ZVS) strategy is proposed to improve converter efficiency. Feature of Natural-Current-Sharing-Voltage-Sharing (NCSVS) of the BFBIC is analyzed, and the stability criterion and the quantitative evaluation method of the NCSVS are given Finally, a 200kW ±10kV DC/DC grid-connected converter is developed for verifying the feasibility.
机译：由于设备较少，效率更高，电网限制较少，因此产生了直接集成在HVDC中的PV的需求，并且对PV的DC / DC转换器进行了研究。在本文中，综述了连接到DC网格的DC / DC转换器拓扑，提出了基于Boost-全桥隔离（BFBIC）的拓扑和模块化输入平行输出串口的拓扑。研究了BFBIC的软切换特性，并提出了零电压开关（ZVS）策略，提高转换效率。分析了BFBIC的自然电流共享 - 电压共享（NCSV）的特征，最后给出了NCSV的稳定性标准和NCSV的定量评估方法，开发了200kW±10kV DC / DC网格连接的转换器验证可行性。

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