Triple four-quadrant rectifier simulation method

Abstract

The invention discloses a triple four-quadrant rectifier simulation method which comprises the following steps: acquiring the corresponding relation between each of PWM control signals and the main circuit topological structure of a triple four-quadrant rectifier system; establishing state mathematical description of the triple four-quadrant rectifier system; acquiring a state description equation of a mathematical model of the triple four-quadrant rectifier system under control signals; and carrying out state equation judgment on the state description equation to acquire a state equation matrix and the mathematical model of the triple four-quadrant rectifier. The real-time simulation method of the invention simplifies the problem of establishing a system state space model of the triple four-quadrant rectifier into the problem of selecting relevant parameters according to the conduction conditions of switching elements, thus the invention ensures the accuracy, reduces the complexity of mathematical modeling, simplifies the realization steps, occupies few system resources, has shorter sampling time in real-time simulation, and has very high real-time property.

Description

technical field [0001] The invention relates to the field of simulation technology, more specifically to the field of half-physical simulation. Background technique [0002] With the rapid development of computer software and hardware, computer simulation has been more and more widely used. Compared with other types of simulation methods, hardware-in-the-loop simulation has a higher possibility of reality, and it is a simulation method with the highest confidence in simulation technology. AC drive is an important direction for the development of railway traction power in my country. In order to provide modern computer simulation testing means for the design and development of AC drive control devices for electric locomotives, the dSPACE real-time simulation system platform is often used to research and develop AC drive half-in-the-loop simulation systems. [0003] During the use of the rectifier in the AC drive system, it should provide straight DC current and DC voltage on...

AI Technical Summary

Problems solved by technology

[0008] However, using the triple four-quadrant rectifier simulation model built with the modules in the MATLAB toolbox, the implementation steps are cumbersome, occupying a lot of system resources, the sampling time required for real-time simulation is relatively long, and the real-time performance is not high

Moreover, the triple four-quadrant rectifier simulation model built with the modules in the toolbox is difficult to solve when performing real-time simulation in dSPACE, which affects the accuracy of the calculation results, and even errors occur, and the accuracy is not high

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