Low loss design study for HV AC cable system

With the increasing use of high-voltage power cables, the installation of high-voltage power cables with large transmission capacity project is increasing day by day. Its system transmission loss problem also aroused the concerns from various aspects accordingly. How to reduce the loss of cable system, in order to improve the current carrying capacity of the limited cable corridor, is to evaluate the efficiency of power system power, and optimize the system design key factor. Considering the complex structure of the power cable system, this paper analyzes several input of the cable system loss model, and puts forward the corresponding optimization suggestions. After analyzing the loss distribution of the AC cable, the influence of each link was elaborated, including the optimal design of the low conductor resistance of the cable design and its current capacity, optimized low loss, low thermal resistance of the metal sheath Design of the impact of the carrying capacity of the application, the use of low thermal resistance metal sheath structure to enhance the carrying capacity, as well as the external environment and laying conditions, laying formation, etc objective conditions for effecting on the power cable system loss. Finally, the method of reducing the loss of power cable, reducing the loss rate, thus increasing its current capacity can be summarized as the following four ways: 1) The use of the structure of the low AC resistance of the conductor is the most effective way to reduce cable system loss; 2) Choose a low loss of the sheath structure, can be reduced to some loss of cable systems; 3) The use of low dielectric loss, high temperature insulation materials, can effectively improve the level of economic operation; 4) Use optimized cable laying to remove thermal bottlenecks.