Regional Power Grid Voltage And Reactive Power Optimization Control Study

In recent years, with the rapid development of the city constructions in our country, the need of power supply is increasing quickly, as well as there is high requirement to the quality and reliability of power supply. However, the present city electricity network can't apply the demand. In order to ensure electricity energy quality, decrease network loss and raise the management level of distribution network, zaozhuang electricity power company and Shandong university work together to develop the global optimization based on voltage and reactive-power control system. Under this ground, this paper has done some work to research voltage and reactive power control method in region network.Voltage and reactive power control of region network is an important issue related to voltage, stability, voltage quality and economical operation of power system. Voltage and reactive power control problem is a typical non-linear problem with discrete variable, multi-constraints, and it's usually affected by the features of interaction and dynamic of power system. Hence, the Voltage and reactive power control problem hasn't got satisfied resolutions for a long time. This paper makes a brief overview of the history and current status of the research on voltage and reactive power control, points out that with the improvement of the computer technology, communication technology, substation automation and dispatching automation level, regional voltage and reactive power optimal control already become possible and propose the global optimization based voltage and reactive-power control system based on analyzing the disadvantages of the traditional methods.The global optimization based voltage and reactive-power control system in zaozhuang power network consists of main station system, voltage and reactive-power real-time control subsystem (VQC) and communication subsystem. The discrete reactive power optimization algorithm of the entire power network is performed in main station system to minimize active-power loss and keep bus voltage within allowable range according to 24 time segment data of the daily active and reactive power of the low-voltage side of each substation (supplied and transmitted in certain...