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Discrete state event driving simulation method for switching transient process of power electronic system

A technology for power electronics and system switching, which is applied in electrical digital data processing, special data processing applications, instruments, etc., and can solve problems such as the transient process simulation mechanism of switching without PAT model.

Inactive Publication Date: 2019-12-31
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this document does not give a general method for the application of the PAT model in the general power electronic converter structure and a simulation mechanism for the switching transient process.

Method used

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  • Discrete state event driving simulation method for switching transient process of power electronic system
  • Discrete state event driving simulation method for switching transient process of power electronic system
  • Discrete state event driving simulation method for switching transient process of power electronic system

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: Simulate a three-stage power electronic solid-state transformer. The schematic diagram of the device is shown in image 3 As shown, it is divided into three conversion stages, which are AC-DC rectification stage, DC-DC conversion stage, and DC-AC inverter stage. Among them, the AC-DC rectification stage adopts a three-phase T-type three-level conversion structure; the DC-DC conversion stage adopts a dual active bridge structure with a switching frequency of 20kHz; the DC-AC inverter stage adopts an H-bridge structure.

[0026] The device is simulated, and the simulation process includes the following steps:

[0027] Step (1) Transient commutation mode analysis. Such as figure 1 As shown, a T-shaped three-level bridge arm is taken as an example for analysis, and the switching transient process shown in the figure is the switching device S 3 The turn-on transient process. By comparing the current path at the beginning and end of the switching transient ...

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Abstract

The invention discloses a discrete state event driving simulation method for switching transient process of a power electronic system , and the method comprises the following steps: step 1, making analysis of a transient conversion mode, and determining an interlocking switch combination mode in the transient conversion process according to a circuit structure and a control instruction of a converter; and step 2, carrying out time scale decoupling simulation, and carrying out serial decoupling simulation on a large time scale dynamic process and a small time scale switching transient process based on a discrete state event driving architecture and a transient segmentation analysis model of a converter unit.

Description

technical field [0001] The invention relates to the technical field of power electronic system simulation, in particular to a discrete-state event-driven simulation method for the switching transient process of the power electronic system. Background technique [0002] Accurate and efficient simulation tools are very important for the analysis, design and evaluation of power electronic systems. Due to the obvious multi-time scale characteristics of the power electronic system, its system model often shows strong rigidity, and the traditional numerical method is difficult to converge and the speed is slow. On the other hand, since traditional simulation software performs simulation calculations based on time-discrete methods, discrete events in the simulation process (such as switching events of power switching devices) need to be solved through iterative algorithms, resulting in an increase in the amount of calculation. The above two reasons lead to the accurate and efficie...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 朱义诚赵争鸣施博辰鞠佳禾虞竹珺
Owner TSINGHUA UNIV
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