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For the partial discharge (PD) measurement of cable circuit only detecting a PD signal is insufficiency, determining the PD location is the real goal, since the purpose of PD measurement is to evaluate the PD correctly and support the maintenance of the cable reasonably. For cable circuit the PD location, the distance between PD sensor and PD source is a very important factor directly affecting the...
The control of cable transmission capacity is decided by the cable capacity, which is determined by the long-term enduring temperature. The cable capacity is usually calculated by the formula of IEC-60287, in which the conductor temperature is supposed to be 90°C (when its insulation is XLPE), and the cable surface reaches its maximal temperature. However, the maximum temperature of the cable surface...
In order to achieve the real-time calculation of cable core temperature, according to principles of heat transfer, proposed is the way of calculating cable core temperature based on the actual operating current and the cable surface temperature. This paper studies the dynamic response of cable core temperature based on the core temperature. Changes of actual running currents result in dynamic response...
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