变压器的平均负荷功率如何计算（How is the average load power of a transformer calculated）.doc

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变压器的平均负荷功率如何计算（How is the average load power of a transformer calculated）.doc

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变压器的平均负荷功率如何计算（How is the average load power of a transformer calculated）

变压器的平均负荷功率如何计算（How is the average load power of a transformer calculated） How do you calculate the average load power of a transformer?.txt people never know who inadvertently said goodbye to you, and then you really never see them again. How long is a minute? It depends on whether you are squatting in the toilet or waiting outside the toilet...... How is the average load power of a transformer calculated? [Tags: transformer load, transformer, average, An] (static. Answer: 1 solve popularity: 16 time: 2009-08-23 16:45 Answer: 0% introduction: the average load factor of the load curve is higher, the loss of power to achieve smaller loss than to use smaller transformers; load curve of the average load factor is low, the loss of power to achieve smaller transformers, the greater the loss ratio to use. By multiplying the average load factor of the load curve by a multiple greater than 1, it is usually desirable to use 1-1.3 as the load factor for optimum efficiency, and then calculate the loss ratio that the transformer should have at the rate of B = (1/R) 1/2. Key words: Transformer 1. Calculation formula of transformer loss (1) active loss: Delta P = P0 + KT, beta 2PK------- (1) (2) reactive loss: Delta Q = Q0 + KT, beta 2QK------- (2) (3) comprehensive power loss: Delta PZ = Delta P + KQ, Delta Q---- (3) Q0 = I0%SN, QK = UK%SN Type: Q0 - no load reactive power loss (kvar) P0 - no-load loss (kW) PK - rated load loss (kW) SN - rated capacity of transformer (kVA) I0% - percentage of no-load current of transformer. UK% - percentage of short-circuit voltage Average load factor KT - load fluctuation loss factor QK - rated load magnetic flux leakage power (kvar) KQ - reactive economic equivalent (kW / kvar) Selection conditions of parameters in upper calculation: (1) take KT = 1.05; (2) when the minimum load is taken from the 6kV to 10kV step-down transformer of the urban power grid and the industrial enterprise power grid, the reactive power equivalent KQ = 0.1kW / kvar; (