Power grid reduction method considering the power active loss
LIU Qing tao, ZHOU Hui, QIU Hui
(Ezhou Power Supply Company of State Grid Hubei Electric Power Company, Ezhou 436000, China)

Abstract: Aiming at the situation of renewable energy, such as wind, photovoltaic and so on, merged into the power grids, and the development of the extrahigh voltage, the power grid scale was becoming much bigger, it was difficult to controll the voltage getting much bigger. In order to solve the problem, the Monte Carlo method was used to simulate the power system real station, and the nonlinear least squares was set to establish relation between the active power loss and active power injection, reactive power injection. The model of power grid active loss could be get. Aiming at the objective, passing through the nodes in grids partition optimization, the result of accord with the real situation was gotten. The simulation test of the IEEE39 buses system was presented. The results indicate that the experimental results verify the forecast accuracy of the proposed method reaches 98%. So the effectiveness of voltage monitoring and controlling is proving and suit to the new power system condition.

Key words: power grid; power loss; reduction; voltage; power grid construction