Application of amorphous alloy distribution transformer in power network
发布时间：2017-09-15
At present, China is vigorously promoting the construction of energy-saving society, adhere to the construction and the same emphasis on saving, improve the efficiency of the use of resources is also an important part of the power industry policy. With the rapid development of China's economy, the rapid expansion of infrastructure, distribution transformer as an important equipment of transmission and distribution system, its demand shows a larger and faster growth trend. China's rural power grid load is strong seasonal, distribution transformer light load or no load operation time is long, the no-load loss becomes the main part of the energy loss. Distribution transformer has a large amount of usage, wide application range and long operation time, so it has great energy saving potential.
Avoid long-term overvoltage operation. Overvoltage will cause overexcitation and saturation of the core, and overexcitation in the transformer core will cause the following effects: 1) Increase of no-load loss; 2) Transformer noise level increases; 3) The high harmonic content in no-load current increases; 4) The inrush current is greater than the no-load current, causing greater mechanical force; 5) When the stray magnetic flux leaves the main magnetic circuit during overexcitation, it will cause additional losses in the structural parts; 6) The temperature rise of the core increases; 7) There is overvoltage at the same time of overexcitation, and the insulation structure should be able to withstand this overvoltage.
Therefore, we should have a detailed understanding of the operation of the power grid in the distribution station area, estimate the over-voltage operation of the station area according to the historical data and current data, and provide it to the transformer manufacturer when ordering the amorphous alloy distribution transformer. Special design can be carried out in special circumstances to meet the requirements of field operation.
The selection of amorphous alloy distribution transformer installation capacity should be based on the calculated load of the power supply station area, and comprehensively consider the transformer load rate, load characteristics, load growth trend and economic operation range, so as to avoid frequent transformer replacement and unnecessary investment waste. In addition, amorphous alloy transformer because of the particularity of its core material, noise level is generally higher than the same capacity of S9 and S11 distribution transformer, installation location is not suitable
