Large-scale ground power stations in our country are generally in the west, which are generally deserts, saline-alkali land, and large temperature differences during the day, and the rodent infestation is also serious, and the environment will be very humid. Cable burial and cable trench filling requirements are compared High; The operating environment of the distributed power station cable is not better than the above-mentioned ground, the cable will withstand a high temperature, with technicians to measure and control, the roof temperature can even reach a high temperature of 100-110 °C, the cable is fire and flame retardant requirements, as well as high temperature, have a great impact on the insulation breakdown voltage of the cable. Therefore, the following points should be considered in the selection design: