A New Method for Calculation and Evaluation of Heat Dissipation Capability of Large Transformer
A heat dissipation capability and transformer technology, which is applied in the field of calculation and evaluation of large-scale transformer heat dissipation capacity, can solve the problems of transformer load capacity drop, transformer heat dissipation capacity drop, heat dissipation capacity drop, etc., and achieve the effect of improving reliability, reducing participation, and low cost
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Embodiment 1
[0056] Taking an oil-immersed self-cooling transformer with a capacity of 180MVA and a rated voltage of 220kV as an example, the high-voltage rated current of the transformer I N 472A, transformer no-load loss P o 100kW, transformer load loss at rated current P E 520kW:
[0057] (1) Real-time collection of operating parameters of the transformer in operation, the operating parameters include the upper oil temperature T 1 , Transformer winding operating current I and real-time ambient temperature T , the recording principle is: record the operating parameters when the transformer temperature is the highest every day. Since the transformer temperature cannot be determined when the transformer temperature is the highest, select the operating parameters of the transformer at 14:00 in the afternoon; the values of each operating parameter are shown in Table 1:
[0058] Table 1 Values of Transformer Operating Parameters in Example 1
[0059]
[0060] (2) Substituting th...
Embodiment 2
[0094] Taking an oil-immersed self-cooling transformer with a capacity of 180MVA and a rated voltage of 220kV as an example, the high-voltage rated current of the transformer I N 472A, transformer no-load loss P o 100kW, transformer load loss at rated current P E 520kW:
[0095] (1) Real-time collection of operating parameters of the transformer in operation, the operating parameters include the upper oil temperature T 1 , Transformer winding operating current I and real-time ambient temperature T , the recording principle is: record the operating parameters of the transformer when the transformer load is maximum every day; the values of each operating parameter are shown in Table 2:
[0096] Table 2 Values of Transformer Operating Parameters in Example 2
[0097]
[0098] (2) Substituting the above operating parameters into formula (1) to calculate the temperature rise of the upper layer oil ,
[0099] (1)
[0100] which is =82-35=47K
[0101] (2)...
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