Abstract: The weak reactive power support of new energy power generation equipment is often difficult to meet the stable operation requirements of short-circuit faults in the near area of the power grid. Compensation devices such as synchronous condensers are often configured to improve the voltage intensity of the power grid. Aiming at the configuration optimization problem of the synchronous condenser when the new energy power system fails, the electrical distance is incorporated into the conventional voltage evaluation index, and the location index considering the node coupling is proposed. The index is sorted to screen out the proposed access location of the synchronous condenser. Secondly, taking the short circuit ratio and annual value of new energy multi-station as the constant capacity index, the scheme of minimum configuration cost when meeting the reactive power intensity of the power grid is selected as the optimal configuration scheme of the condenser. Finally, a simulation case is established. The analysis results show that the synchronous condenser configuration point obtained by this method can significantly improve the economy of the configuration scheme while ensuring the voltage intensity of the power grid when the three-phase short-circuit fault occurs, and the effectiveness of the method is verified.

Key words: reactive power compensation, configuration of synchronous condenser, the electric distance, multiple renewable energy station short circuit ratio, select the address to determine the capacity