The participation of high-energy load in demand side response has become an important measure to promote the consumption of new energy. In the future, the new power system will face the situation of increasing the proportion of new energy and large-scale access of high-energy load. It is urgent to study the impact of large-scale access of high-energy load on the power grid, so as to reasonably plan the location and capacity of new energy units and high-energy load in the distribution network. Therefore, silicon carbide load is taken as the research object, and an IEEE33 node system with high proportion of wind power is built based on MATLAB/Simulink simulation platform.Based on the parameter perturbation method, the impact of different access locations of wind turbines and silicon carbide loads on the power grid is evaluated from three aspects of power quality, technical economy and safety. The entropy fuzzy analytic hierarchy process is used to evaluate the simulation results；The evaluation results are consistent with the theoretical analysis, which verifies the effectiveness of entropy fuzzy analytic hierarchy process.