Optimization of Transformer Capacity in Photovoltaic Power Stations Based on Hotspot Temperature Simulation
In design and planning of photovoltaic power station projects,most of the main transformers have a large ca-pacity.By analyzing the hourly power generation data of photovoltaic system and the temperature conditions of the envi-ronment,combined with calculations,the hourly hot spot degree and corresponding thermal aging parameters of the main transformer can be obtained,and then the equipment usage of the main transformer can be accurately simulated.It is found that no-load operation time of the main transformer is longer than full load operation time,and the no-load operation presents a low aging state,which can effectively compensate for the rapid aging situation of full load operation.Moreover,full load and overload within a controllable range will not affect the insulation performance of the main transformer equip-ment.The early damage problem of main transformer equipment caused by high hot spot degree is the main influencing factor in the optimization design of the main transformer capacity,which deserves serious deliberation.
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