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"In long-distance power transmission, if the transmission voltage is 2000V, the transmission power is 10kW, and the resistance of the transmission line is 20ohm, the power loss on the transmission line is more
The transmission current is: I = P / u = 10000w / 2000V = 5A,
The lost power is: P loss = I ^ 2R = (5a) ^ 2x20 Ω = 500W
In the case of long-distance transmission, if the resistance of the transmission line is constant, then the power lost on the transmission line ()
A. It is directly proportional to the electric power and inversely proportional to the voltage
B. It is inversely proportional to the electric power and directly proportional to the voltage
C. It is directly proportional to the square of the transmitted electric power and inversely proportional to the square of the transmitted voltage
D. It is inversely proportional to the square of the transmitted electric power and directly proportional to the square of the transmitted voltage
Why?
Under the condition of a certain power transmission, the higher the power transmission voltage is, the smaller the power transmission current is. Due to a certain resistance, the lower the power loss is, so the voltage is inversely proportional to the power loss
When the transmission power is larger, the transmission voltage is constant, and the transmission current is larger. Because the resistance is fixed, the loss of power is larger, so the transmission power is proportional to the loss of power
A
The output power of the generator is 10 kW, the output voltage is 250 V, and now it transmits electricity to the distance with 2500 v. what is the current? If the total resistance of the transmission line
The output power of the generator is 10kW and the output voltage is 250V. At present, 2500 V is used to transmit electricity to distant places. What is the current? If the total resistance of the transmission line is 6.25 ohm, what is the electric power lost? What is the percentage of the power lost on the transmission line in the total power?
If the efficiency of the transformer is 0.85, the transmission power after conversion is only 8.5kw, the actual transmission current is 3.4A, the loss power is 3.4 * 3.4 * 6.25 = 72.25w, and the loss power of the transmission line accounts for 0.85% of the total transmission power
A generator, the output power is 8000kw, the resistance of the transmission line is 15 Ω, when the transmission voltage of the generator is 100kV
Find the current on the wire, the voltage and power loss on the transmission line
Because it is a generator, then the output power P = UI (U is the transmission voltage, I is the output current, I is the current on the wire)
I=P/U=80A
The lost voltage is the voltage generated on the transmission line, U1 = IR
U1=80*15=1200V
The power loss is P1 = I & # 178; r = 9.6KW
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