Reactive power planning and strategy research considering backbone grid voltage stability

As one of the five system of State Grid corporation of China,Big planning system is the premise and guarantee for the other four big system. And reactive voltage planning, as a very important part of the power grid plan, is the foundation that guarantee grid economic, reliablity and stablity. In line with saving investment and improving the operational efficiency of the power grid, this paper to “twelfth-five” plan of Shandong grid as an example, analysed the configuration of reactive compensation equipment; processed reactive power optimization calculation; processed the margin of the grid stability and the ability to resist the perturbation analysis; evaluated the entire grid voltage safety level; conformed the optimal installation site and the capacity of reactive compensation equipments. It ensure that the backbone grid is reliable as well as optimal, and offered technical support and provide theoretical guidance for “ Big power grid planning” system construction.