| With the Tabei oilfield exploration and development of the expansion and rising of oil and gas production, oil field power system is also growing. Although it is improved the anti-interference ability of the grid after Tabei oilfield power grid and Aksu power grid interconnection, it has also brought in some new questions: reactive power lower, active power load fluctuations, the power supply is decided to the users'experiences, especially the power grid is still radial structure, and the breaks down and tripping will result in a large area's power outage with long time. Therefore, improving the system voltage stabilization level and preventing voltage collapse accidents are Tabei Oilfield guarantee of development. This paper uses the bifurcation theory to do simulation analysis after simplifing and modeling the Tabei power grid. And the results showed that there are many bifurcation phenomenas in the Tabei power grid system ,and the system's reactive power is ample.This paper carry out an in-depth study on voltage stability of Tabei power grid by reactive balance, load characteristics and so on.In view of its own features such as electricity supply radius long, the load light and many power supply , through the simulation finds out the relationship between load parameter factorλwith the station generating units'reactive power; relationship among the load parameter factorλand voltage stability of generator units, each side of the transformer substation, the main transmission line, and it also studies detaily the influence of the reactive power of generating units issued on the system voltage stability,and draw relevant conclusionsFinally, by combining bifurcation theory, the thesis analyzes the integrated simulation Tabei grid voltage stability of the overall situation and reach conclusions in the view of each substation.Because of its characteristics and existing problems, the thesis raises relevant measures to improve voltage stability for Tabei power grid.
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