Analysis And Application Research On The Method Of Improving Power Factor Of Building Power Distribution

With the continuous advance of the industrialization and urbanization process of our country, industrial and civil buildings increased a lot,the social demand for electricity is growing larger and larger,however, the supply of electrical energy in our country is more and more nervous,and even appeared serious electric energy gap. Using a large amount of low power factor, nonlinear electrical equipment in the industrial and civil buildings,lead to the power factor of the power distribution system is low, it makes the utilization of the electric energy can not be effective. By adopting proper methods and measures, can improve the power factor of the power user distribution system significantly, reduce the transmission of reactive power in the line, reduce the waste of electric energy, and improve the utilization efficiency of electric energy, and it is of great significance to the green operation of the power system.This article from the perspective of the electric design of building power distribution system, studies and analyzes the method of improving the power factor of the building power distribution, which is the research subject of this article, its main content is:Firstly, on the basis of the basic theory of power factor, the reason of the low power factor of the power distribution system is analyzed, discusses the significance of improving power factor to transmission system, distribution system and power user, and summed up the two basic ways including improving natural power factor and reactive power compensation to improve the power factor of power distribution system at present.Secondly, on the basis of the analysis of the electrical equipment characteristics in the building power distribution system, studied the specific methods and measures including improving the transformers and the asynchronous motor load rate, reducing the distribution system wire inductance and choosing other energy-saving equipment reasonably for improving the natural power factor of power distribution system.Thirdly, studied the method of choosing the target power factor and the reactive power compensation capacity, analyzed the kinds and the selection method of reactive power compensation method in power distribution system, and according to the working principle of each basic reactive power compensation device and the TSC+SVG/APF hybrid reactive power compensation device, compared and analyzed the basic performance,compensation effect and the applicable occasions of each device, studied the method of choosing reactive power compensation device,and it is concluded that the TSC+SVG/APF device can not only obtain a good compensation effect, but also is relative economic.Finally, taking the power distribution system design of an actual project as the case to analyze, adopting the optimal scheme through taking reasonable measures to improve the natural power factor and using TSC+APF hybrid reactive power compensation device for its power distribution system, and building the model of the reactive power compensation scheme of the building power distribution system under the environment of Matlab/Simulink, and analyzes the simulation results and the economic benefits brought by the reactive power compensation scheme, and verifies the economic and rationality of this reactive power compensation scheme.Through adopting the measures analyzed in this article including improving the natural power factor and reactive power compensation scheme for the engineering case, and through the simulation analysis about the reactive power compensation scheme by the Matlab software, and verifies the validity, reliability and economy of the methods of improving the power factor of the building power distribution system, which are studied in this article.