Numerical Integration Method Of Power System Transient Stability Calculation Based On Precise Integration

The power system transient stability calculation is one of the basic contents in power system analysis. The importance of the calculation not only will affect the operation in power system, but also will influence the procession of making a correct decision. Both of these will affect the security of the power system. The calculation methods in power system transient stability still can not meet the needs of the operation and the analysis in power system, though it has been well developed. After doing some research on the method of precise integration in math, this article presents an implicit precise integration method, which is fit for the calculation in power system transient stability.The article discusses the theory of the precise integration at first and then presents an implicit precise integration method based on Duhamel integration. The method can be applied to different models, in addition to that the numerical precision and the numerical stability are the other two merits compared to the other methods. The calculation speed and the precision in power system transient stability can be improved by some extent with this method. Then a new predication method of the bus voltage is presented according to the features of the power system. The method has many advantages, such as simple in formulation, easy to use. The effect of the method is obvious that it can reduce the calculation load in solving the network equation. And the results of the simulation can prove that the two methods are effective enough to be used in the power system transient stability calculation.Some of the problems that should be researched on are proposed at the end of the article, and these are the research direction for the future work.