User defined simulation method for electrical power system based on mixed variable step size stimulation

Abstract

The invention provides a user defined simulation method for an electrical power system based on mixed variable step size stimulation. A user defined function of an analyzing packaged program of the electrical power system is optimized through the pretreatment, initialization and stimulation calculation of a user defined model; the redundancy of the user defined model is reduced when the dynamic process of the system is stable; the calculation speed is increased while the acceptable accuracy of the engineering calculation is not lost; the fine accurate calculation is performed in the to-be-concerned period; the mixed step size stimulation function in the electromechanical-electromagnetic transient and electromechanical-medium and long term processes of the analyzing packaged program of the electrical power system is achieved; the variable step size stimulation is realized to some extent; the calculation convergence, accuracy and calculation efficiency of the analyzing packaged program of the electrical power system are increased; the use scope of the analyzing packaged program of the electrical power system is widened.

Description

technical field [0001] The invention relates to a simulation method, in particular to a user-defined simulation method of a power system based on hybrid variable step size simulation. Background technique [0002] With the rapid development of power system and power electronics technology, new system components are continuously invested and system control technology is improving day by day. It is required that several new components and various control functions can be simulated in the calculation of power system. General simulation analysis software is equipped with user-defined (UD) modeling and / or third-party software interface functions to realize open simulation of the software and make up for the lack of professional simulation software. [0003] Among the existing power system simulation software in China, the UD function technology is relatively backward. There is a UD function in the Power System Analysis Software Package (PSASP), but its simulation uses a fixed ste...

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Problems solved by technology

[0003] Among the existing power system simulation software in China, the UD function technology is relatively backward. There is a UD function in the Power System Analysis Software Package (PSASP), but its simulation uses a fixed step size consistent with the main program, which is prone to spontaneous Define the problem that the model calculation does not converge or the calculation redundancy is too large, which affects the accuracy and efficiency of the simulation

[0004] Foreign commercial software such as matlab, PSCAD, etc. all possess UD functions, and are variable step size simulations, but the simulation algorithms and flow processes of these software and PSASP are very different, so the implementation mechanism is different from the present invention, and has not yet been realized based on fixed step size simulation Mixed variable step size UD simulation method under the main program

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