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The total resistance of the transmission line is r = 20 Ω The total resistance of transmission line is r = 20 Ω (1) It is proved that if the transmission power is 40kW and the transmission voltage is U1 = 1000V, the user's voltage is less than 220V (2) Try to calculate: if the voltage of U1 = 2000V is used for power transmission, and the remote users can obtain 50KW electric power to generate electricity What is the output power of the station?
The delivery current is P1 / U1 = 40A
The power of line loss is (40a) × (40a) × 20 Ω = 32000w = 32kw
Then the user's power is 40kw-32kw = 8kw
The voltage obtained by users is 8kw △ 40A = 200V
The output power from the power station is 200kW, and the total resistance of the transmission line is 0.05. Two kinds of voltage, 110V and 11kv, are used to transmit power. The voltage loss caused by the resistance on the transmission line under the two conditions is estimated
There is another one. If two kinds of voltage, 220 V and 11 kV, are used to transmit power, the power loss on the transmission line, the length and resistivity of the conductor are the same, then the ratio of the cross-sectional area of the conductor is calculated
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