In this article

the cause of low power generation and low system efficiency（PR value） comparing with its feasibility study report has been thoroughly analyzed. Recently in a power station in Shanxi

the power generation and the PR data is lower than expected after being put into operation after initial operation. As soon as the abnormal situation is realized

a expert team was organized and assigned to site to do further inspection and finally the solution was found successfully.Through the process

the experts found out the main reason that reducing the power generation was the block of the dust

especially the belt shape block of the lower edge of PV component after raining. Therefore

the exclusive cleaning plan to improve the power generation capability was made

as well as the references for the future design and O&M of a similar power station.