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Interpolation compensation current switch model based power electronic simulation method

A technology of power electronics and interpolation compensation, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., and can solve problems such as large errors

Active Publication Date: 2016-01-06
TSINGHUA UNIV
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Problems solved by technology

However, due to the large error between the ADC model and the ideal switch model, it is usually only suitable for small step size (1μs) simulation. In system level simulation, when the step size is larger than 10μs, the error is relatively large

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  • Interpolation compensation current switch model based power electronic simulation method
  • Interpolation compensation current switch model based power electronic simulation method
  • Interpolation compensation current switch model based power electronic simulation method

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Embodiment Construction

[0034] The power electronics simulation method based on the interpolation compensation current switch model proposed by the present invention comprises the following steps:

[0035] (1) Establish branch-level electromagnetic transient equivalent models for power electronic systems, including the following steps:

[0036](1-1) Set the form of the differential equation of the components in each branch of the power electronic system as:

[0037] d x d t = f ( t , x )

[0038] Wherein, described element is resistance, inductance, capacitance, transmission line, cable or generator, x is the state variable of each element in each branch, f is a smooth continuous function, t is simulation time;

[0039] (1-2) Transform the above state space equation into a difference equation in the discre...

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Abstract

The present invention relates to an interpolation compensation current switch model based power electronic simulation method and belongs to the technical field of electromagnetic transient analysis of power systems. The method provided by the present invention is high in simulation precision, a switch model which still can ensure a node admittance matrix to be unchanged at a switching moment is provided, and a novel switch model based on an interpolation compensation current is designed. The model not only can improve the simulation precision of traditional ADC models, but also can be applied to system-level large step simulation. Therefore, the improved switch model provided by the present invention is of great theoretical and practical engineering significance in both offline simulation and real-time simulation of power systems comprising large-scale power electronic components. The model can be used in module combination type multilevel converter topology and voltage source type converter topology, and can improve the model precision while improving the simulation efficiency. The method is suitable for realizing offline simulation and real-time simulation and facilitates the engineering popularization.

Description

technical field [0001] The invention relates to a power electronic simulation method based on an interpolation compensation current switch model, and belongs to the technical field of electromagnetic transient analysis of power systems. Background technique [0002] Digital simulation is an important tool for researching new energy and flexible AC transmission system (FACTS) and other power electronic technologies. Traditional electromagnetic transient simulation has become a research tool for power system safety analysis and control due to the accuracy of its model and the ability to provide three-phase instantaneous waveforms. important means of research. However, when the network contains a large number of power electronic components, the speed of traditional electromagnetic transient tools is greatly reduced, which affects the efficiency of simulation and research. [0003] For the switch model studied at the system level, since the device-level process of the switch is...

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Application Information

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IPC IPC(8): G06F17/50G06Q50/06
Inventor 舒德兀张树卿
Owner TSINGHUA UNIV
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