Passive controller design method used for motor train unit rectifier

Abstract

The invention discloses a passive controller design method used for a motor train unit rectifier. The passive controller design method comprises the following steps: establishing a mathematical model of the motor train unit side pulse rectifier, further establishing a port controlled Hamilton mathematical model with dissipation of the motor train unit side pulse rectifier, then proving the passivity of the motor train unit side pulse rectifier, determining the balance point of system stability, and finally deducing a passive controller based on the rectifier by using a passive control thought based on interconnection and damping assignment. The dissipation of system energy is quickened by injecting new damping dissipation, a new energy function reaches a minimal value at the system balance point, so that a rectifier controller based on IDA-PBC is deduced without solving a partial differential equation. A passive controller designed in the invention has relatively high static and dynamic performances, and the new thought is provided for solving a direct-current link voltage overshoot problem of the motor train unit side rectifier.

Description

technical field [0001] The invention relates to the field of rectifier control for a motor train network, in particular to a design method for a passive controller used for a rectifier of a motor train group. Background technique [0002] In recent years, with the rapid development of high-speed railways, more and more new AC-DC-AC transmission CRH series EMUs and HXD series electric locomotives have been put into operation in large quantities. At present, the control strategies of pulse rectifiers for EMUs and electric locomotives are divided into current control strategies and nonlinear control strategies. Because pulse rectifiers are nonlinear and strongly coupled systems, nonlinear control strategies can improve the performance of the rectifiers. Transient direct current control in the current control strategy is currently used in electric locomotives and high-speed EMUs. The existing controllers are all based on linear PI controllers. [0003] In order to improve the c...

AI Technical Summary

Problems solved by technology

In short, the control parameters of the most commonly used linear PI control method are not easy to tune, and it is sensitive to system disturbances

The four-quadrant converter is a typical nonlinear, multi-variable and strongly coupled system, which is sensitive to external disturbances and system parameter changes, so the traditional linear control method cannot achieve the ideal control effect.

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