I am interested in the power losses of three-phase HV underground power

cables rated at (1MVA, 33kV), and all values of MVA and kV above this.

Specifically, I am interested in the Voltage-dependent power loss in the

cable dielectric, due to (possible) AC hysteresis effects in the

dielectric, and also due to the (possible) effect of leakge resistance

between line and neutral. Would it be correct to say that the combined

effect of these losses would always be negligible, compared with the

I-squared-R loss that is taking place in the conductors? If untrue, what

value would the dielectric loss have, typically, compared with the

I-squared-R loss?

I need this information because I am a tariff metering engineer, and am

involved in compensating a power-station meter for losses in a

privately-owned cable that takes the power out of the station to the

National Grid, a few kilometres away. I lack the necessary expertise on

this aspect of power cables.

Richard Chambers Leeds UK.

- posted
12 years ago