Non-linear modeling solving method based on matrix index electromagnetic transient simulation

A technology for electromagnetic transient simulation and matrix index, applied in the field of nonlinear solution of simulation

Active Publication Date: 2015-01-21
TIANJIN UNIV +1
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Problems solved by technology

[0017] The technical problem to be solved by the present invention is to provide an electromagnetic transient simulation system based on matrix index that combines the accurate simulation ability and rigid processing ability of matrix index for linear dynamic system, and makes up for the lack of its ability to deal with nonlinear elements. Nonlinear Modeling Solution Methods

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  • Non-linear modeling solving method based on matrix index electromagnetic transient simulation
  • Non-linear modeling solving method based on matrix index electromagnetic transient simulation
  • Non-linear modeling solving method based on matrix index electromagnetic transient simulation

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[0063] A nonlinear modeling and solving method based on matrix exponential electromagnetic transient simulation of the present invention will be described in detail below in conjunction with the embodiments and drawings.

[0064] A nonlinear modeling and solving method based on matrix exponential electromagnetic transient simulation of the present invention is to form the overall simulation model of the research system including nonlinear elements through the interconnection of subsystems, combined with the advantages of the calculation accuracy of the matrix exponential method and fixed point iteration With the advantage of computing speed, it realizes the electromagnetic transient simulation of power system with strong nonlinear characteristics. Algorithm flow chart such as figure 2 As shown, it specifically includes the following steps:

[0065] 1) Divide the power system to be studied into a linear network subsystem and a number of nonlinear grid-connected component subs...

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Abstract

A non-linear modeling solving method based on matrix index electromagnetic transient simulation comprises the steps that first, under a state analysis frame, electromagnetic transient simulation models of a linear network and a grid-connected non-linear element are established, and then through subsystem interconnection relation, an overall electromagnetic transient simulation model of an electric power system to be studied is formed; after relevant simulation parameters such as simulation step sizes and convergence precision are set, a simulation program is started; in each simulation step size, a fixed point iterative method is used for solving a non-linear equation comprising a matrix index function, and the results are used as a state variable of the current moment; an output vector yn + 1 is obtained through an output equation, output files are written in, and a step size is pushed forward in a simulation mode; and iteration is carried out in sequence until simulation is over. The great numerical precision and the rigidity processing capacity of a matrix index integration method are kept, general modeling and simulation capacity is achieved on the non-linear performance of an electric power system element, and the application range in the electric power system electromagnetic transient simulation field of the matrix index integration method is expanded.

Description

technical field [0001] The invention relates to a simulated nonlinear solving method. In particular, it relates to a nonlinear modeling and solving method based on matrix exponential electromagnetic transient simulation, which is suitable for the application of electromagnetic transient modeling and simulation in power systems. Background technique [0002] The electromagnetic transient simulation of the power system mainly reflects the change process of the electric quantity generated by the interaction between the electric field and the magnetic field in the system, and the instantaneous value waveform of the three-phase voltage and current in the spectrum range from power frequency to tens of kHz can be obtained. In order to accurately obtain the high-frequency characteristics in the dynamic process of the system, the simulation step size of the electromagnetic transient is usually at the microsecond level. With the development and wide application of DC technology, the ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06F9/455G06Q50/06
Inventor 王成山富晓鹏李鹏于浩宋关羽于力郭晓斌许爱东董旭柱吴争荣
Owner TIANJIN UNIV
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