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    • 2. 发明申请
    • GRID-CONNECTED POWER CONVERSION CIRCUITRY AND POWER CONVERSION METHOD THEREOF
    • 网格连接功率转换电路及其功率转换方法
    • US20120013190A1
    • 2012-01-19
    • US12878126
    • 2010-09-09
    • Jin-Ming ChangYu-Ming SunChi-Bin Wu
    • Jin-Ming ChangYu-Ming SunChi-Bin Wu
    • H02J4/00
    • H02J3/382Y10T307/696
    • A grid-connected power conversion circuitry and a power conversion method thereof are disclosed. A DC-DC converter converts a renewable energy into a stable and constant DC power. A DC-AC inverter inverts the DC power into an AC power. The duty cycle of the DC-DC converter is adjusted based on a feedback signal related to the DC power, thereby stabilizing the output of the DC-DC converter. The duty cycle of the DC-AC inverter is adjusted based on a feedback signal related to the AC power as well as the phase angle of grid power that is in turn detected by a phase angle processor. Consequently, the AC power can be synchronized with the grid power in frequency. Therefore, the grid system provides auxiliary power when the renewable energy is insufficient, and the AC power output by the DC-AC inverter is synchronized with the grid power in frequency.
    • 公开了并网电力转换电路及其功率转换方法。 DC-DC转换器将可再生能源转换成稳定且恒定的直流电力。 DC-AC逆变器将直流电转换为交流电源。 基于与直流电力相关的反馈信号来调整DC-DC转换器的占空比,从而稳定DC-DC转换器的输出。 基于与AC电力相关的反馈信号以及由相位角处理器进一步检测的电网功率的相位角来调整DC-AC逆变器的占空比。 因此,AC电源可以与电网功率频率同步。 因此,当可再生能源不足时,电网系统提供辅助电力,直流 - 交流逆变器输出的交流电力频率与电网功率同步。