At present

many photovoltaic power generation projects do not strictly control the manufacturing process of main equipment manufacturers such as box transformers in a short period of time and heavy tasks

resulting in prominent problems such as the installation and operation of box transformers with defects.By analyzing the reasons for the high oil temperature in a large-scale box transformer during the operation of a certain photovoltaic power station

it selects twice and sends two box transformers with frequent high oil temperature during operation and a new box transformer with improved heat dissipation components to a transformer quality appraisal center for type testing.Through visual inspection

experimental analysis

disassembly verification and other technical means

it is finally determined that the box transformer could not pass the type test due to manufacturing process problems

directly verifying the reason for the high oil temperature during the operation of this batch of box transformer products.Finally

through research and summary of other transformer accidents

it proposes necessary and feasible reference experiences for improving the technical specifications of transformer manufacturing enterprises

selecting professional technical personnel to supervise on-site

and strictly controlling the manufacturing process and installation quality of transformer.It ensures that the on-site box-type transformers of photovoltaic power stations can operate safely and reliably for a long time.