Abstract
The expediency of using more expensive 6-10 kV cables with XLPE insulation was proved by us on the basis of the method of multi-purpose optimization, which took into account both the resulted costs for the construction and operation of cable lines, and the reliability of its operation, as well as the convenience of installation. Without compensation of capacitive currents, permissible difference in the height of the cable laying, the effect of cable lines on the environment.
Highlights
The expediency of using more expensive cables with XLPE insulation in comparison with cables with paperand-oil insulation will be considered for cable lines made with cables:
Capital costs for the cable line construction Кк.л are comprised of the cost of purchasing the cable Кк and the cost of its installation Кл
К к.л where the coefficient taking into account the number of times the cost of building a cable line exceeds the cost of the cable itself; the value of 1 = 2.08; 2.67; 1.74; 3,3 - respectively, for lines with a voltage of 6-10; 20; 35; 110 kV; a factor that takes into account the increase in the cost of a cable with XLPE insulation compared to the cost of a cable with combined insulation
Summary
The expediency of using more expensive cables with XLPE insulation in comparison with cables with paperand-oil insulation will be considered for cable lines made with cables:. - single-core cross-sectional area of conductors 35-240 mm (cables with XLPE insulation) and threecore with the same cross-sectional area of wires (cables with paper-and-oil insulation) with a voltage of 6-35 kV;. - single-core cross-sectional area of strands 150-630 mm (cables with XLPE insulation) and singlecore cross-sectional conductors (oil-filled cables with paper-oil insulation) with a voltage of 110 kV. To assess the indicated expediency of using power cables with XLPE insulation in relation to cables with impregnated paper insulation, we will use both the reduced cost method and the multi-purpose optimization method, which allows taking into account the cost and the quality indicators
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