Design method of passive controller for EMU rectifier

Abstract

The invention discloses a passive controller design method for a rectifier of an EMU, which includes establishing a mathematical model of a pulse rectifier on the network side of an EMU, further establishing its port-controlled Hamiltonian mathematical model with dissipation, and proving that the EMU The passivity of the grid-side pulse rectifier is determined, and the balance point of system stability is determined. Finally, the passive control idea based on interconnection and damping distribution is adopted to derive the passive controller based on the rectifier. The energy dissipation of the system is accelerated by injecting a new damping dissipation term, so that the new energy function reaches the minimum value at the system equilibrium point, so that there is no need to solve the partial differential equation to derive the controller based on IDA-PBC rectifier. The passive controller designed by the invention has strong dynamic and static performance, and provides a new idea for solving the problem of voltage overshoot of the DC link of the rectifier on the side of the train network.

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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