Photovoltaic power generation system and control method thereof

The invention relates to a photovoltaic power generation system and a control method thereof. The photovoltaic power generation system comprises a solar cell module, a power detection device, an electric storage device, a bidirectional conversion device and a control device, wherein the bidirectional conversion device is used for switching working modes so as to utilize the solar cell module to supply power for the electric storage device or enable the electric storage device to discharge loads; and the control device is used for controlling the bidirectional conversion device and each outputcircuit according to power parameters of the solar cell module, electric quantity of the electric storage device and total power requirement of each output circuit, so as to ensure that the total output power of the solar cell module is maximum output power. The photovoltaic power generation system has relatively high energy source utilization efficiency. 本发明涉及种光伏发电系统及其控制方法。其中光伏发电系统包括：太阳能电池组件；功率检测装置；蓄电装置；双向变换装置，用于切换工作模式，以