Design method of passive controller used for rectifier of railway high-speed train

Abstract

The invention discloses a design method of a passive controller used for a rectifier of a railway high-speed train. The method comprises the following steps of: step 1, building a mathematical model in a dq coordinate system of a grid-side pulsed rectifier of the railway high-speed train; step 2, building an Euler-Lagrange mathematical model of the grid-side pulsed rectifier of the railway high-speed train; step 3, deducing and proving the passivity of the grid-side pulsed rectifier of the railway high-speed train according to the mathematical model built in the step 1 and solving an expectedbalance point of the rectifier; and step 4, injecting damping and acquiring a passive control law based on the Euler-Lagrange model according to the expected balance point acquired in the step 3 and the mathematical model acquired in the step 2. The method provided by the invention improves the stability of the rectifier and reduces the direct-current voltage overshoot of the grid-side rectifier of the railway high-speed train; and basing on the damping injecting method, the energy function is quickly convergent to the expected energy function, so shat the dynamic performance of the control system is improved.

Description

technical field [0001] The invention relates to the field of rectifier control on the grid side of a motor train, in particular to a passive control design method for a rectifier of a motor train. Background technique [0002] With the development of society, electrified railways are developing rapidly towards high-speed, heavy-duty, and high-density directions. More and more new AC-DC-AC transmission CRH series EMUs and HXD series electric locomotives have been put into operation in large quantities; the current EMUs and electric locomotives The pulse rectifier control strategy is divided into linear control strategy and nonlinear control strategy. Because the pulse rectifier is a nonlinear and strongly coupled system, the nonlinear control strategy can improve the performance of the rectifier. Among the linear control strategies, the transient direct current control is the current electric locomotive and Many control strategies are used in high-speed EMUs, and the existing...

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Problems solved by technology

[0003] In order to improve the control performance of the locomotive line-side pulse rectifier, Zhang Guinan et al. established a closed-loop small-signal model of a single-phase pulse width modulation (PWM) rectifier; through the generalized Nyquist criterion and Bode diagram, the stability of the vehicle-network coupling system was analyzed. The stability of the train control parameters and the number of trains are affected by it; the simulation shows that the stability of the vehicle network system has a great relationship with the control of trains and trains; Menth S et al. studied the phenomenon of low-frequency voltage fluctuations caused by multiple locomotives , found that the number of locomotives and the parameters of the control system have a greater impact on this phenom

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