Abstract: To promote the development of photovoltaic（PV） power generation and speed up the efficient use of new energy source,several MW level grid-connected PV power plant demonstration projects have been successively started and completed in China.The paper reviews the operating experience of both domestic and foreign large-scale PV power plants,the main problems,the converters and grid-connected impacts.It also describes the main features and progress of the key technologies,summarizes some inspiration on the construction and operation of large-scale PV power plants,makes a forecast of its prospects and technology development trends.