Correct answer:
D. The voltage loss on the transmission lines from the step-down transformer to each user becomes greater.
The main reason why the lights are not bright enough in the power surge converter is that after the load increases, the current increases and the voltage loss on the transmission lines from the step-down transformer to each user. becomes bigger. Voltage loss on transmission lines is equal to current times current. Line resistance, loss U = IR.
Although the voltage loss of high-voltage transmission lines also increases, because the current of high-voltage transmission lines is small, the loss does not is not important. The main reason is that the voltage loss from each user to the transmission line is large.
The voltage on the secondary coil of the transformerstep-up transformer becomes greater\The voltage on the secondary coil of the step-down transformer becomes greater. The supply voltage is fixed and the number of turns of the transformer. The transformer winding is fixed. It is impossible for the voltage to increase, but the maximum power consumption The load will definitely increase over the period, that is, the current will increase and the impedance of the line is fixed. is Z, the load current is normally I1 and I2 during the peak period, then the line voltage drop is normally U1 and U2< during the peak period /p>
The normal line voltage drop is U1=I1*Z, U2=I2*Z during peak hours. U2 must be greater than U1, so when the load increases, the line loss voltage increases, which people call line loss
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