A Study of the Characteristics of Two-Wire High-Voltage Cables for Increased-Frequency Electrical Systems

Resumo

Results of the development and application of increased-frequency electrical systems for industrial power supply systems of electrotechnological installations based on KVSP-M cable can be improved by the use in their structure of cable lines of other types. It is reasonable to consider the possibility of using shielded two-wire cables. Such cables are widely used in power supply systems of ships, river vessels, and drilling rigs. However, the information on the parameters of these cable lines is scanty and rather contradictory. To fill this lacuna in knowledge, an engineering method has been developed for calculating the linear capacitance of such cable lines based on a known method for calculating electric fields—the method of equivalent charges. Good agreement has been obtained between the results of calculating this parameter and measuring its value for particular designs of such cable lines, which agreement supports the validity of the proposed method. The influence of the design parameters of a metal-shielded two-wire cable line on the linear capacitance and inductance, as well as the wave impedance of the line, has been estimated. The results obtained are necessary for calculating the steady-state operating conditions of high-voltage electrical systems of increased frequency when used in power supply systems for process equipment.