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Fuzzy passive control design method for EMU train rectifier based on EL model

A passive control and design method technology, applied in the direction of output power conversion device, AC power input conversion to DC power output, electrical components, etc., can solve the problem that the control parameters are not easy to set, the control effect cannot be achieved, and the system is sensitive to disturbances And other issues

Inactive Publication Date: 2019-04-05
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

In short, the control parameters of the most commonly used linear PI control method are not easy to adjust, and it is more sensitive to system disturbances; while the four-quadrant rectifier is a typical nonlinear, multivariable and strongly coupled system, which is sensitive to external disturbances and system parameter changes. It is more sensitive, so the traditional linear control method can not achieve the ideal control effect

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  • Fuzzy passive control design method for EMU train rectifier based on EL model
  • Fuzzy passive control design method for EMU train rectifier based on EL model
  • Fuzzy passive control design method for EMU train rectifier based on EL model

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Embodiment Construction

[0051] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0052] Taking CRH5 type EMU as an example to illustrate the method of the present invention, what CRH5 type EMU network side rectifier adopts is a four-quadrant pulse rectifier; the specific process is as follows figure 1 As shown, Step 1: Establish the EL model in the dq coordinate system of the pulse rectifier on the side of the EMU network; for the two-level topology, the pantograph takes the current from the catenary, and after being stepped down by the on-board transformer, it is used as the input of the rectifier, and the rectifier will The input single-phase AC voltage is converted into a stable DC voltage; by writing Kirchhoff’s first and second law KCL and KVL equations for the AC side and the DC side respectively, the dq coordinate system of the pulse rectifier on the side of the EMU network can be obtained mathematical model.

[005...

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Abstract

The invention discloses a fuzzy passive control design method for an EMU (electric multiple units) train rectifier based on an EL model. The method comprises the following steps of establishing the ELmodel under a dq coordinate system of an EMU grid-side pulse rectifier, proving the passivity of the EMU grid-side pulse rectifier and solving a desired balance point of the rectifier according to the model, obtaining a passive control law based on the EL model according to the desired balance point and the model, online adjusting the value of injection damping with the combination of a fuzzy control principle to realize the design of a fuzzy passive controller and the application in the EMU grid-side pulse rectifier. According to the method, an energy function quickly converges to the desired energy function, the DC voltage overshoot of the EMU grid-side rectifier and the volatility are reduced, based on the traditional passive control, combined with the fuzzy control theory, the value of the injection damping is online adjusted, the self-tuning of the injection damping is realized, and the dynamic performance and robustness of the rectifier are improved.

Description

technical field [0001] The invention relates to the field of rectifier control on the grid side of a train set, in particular to a fuzzy passive control design method for a rectifier of a train set based on an Euler-Lagrange (Euler-Lagrange, EL) model. Background technique [0002] With the rapid development of high-speed railways in my country, a large number of EMUs and high-power electric locomotives have been put into operation on intercity railways, passenger dedicated lines, and speed-up lines, making the train-network coupling system more complicated. The high-intensity operation of EMUs and electric locomotives has caused low-frequency oscillations in the network voltage and flow of the traction network, leading to traction blockade and affecting the stable operation of high-speed railways. Studies have shown that this phenomenon is related to the nonlinear and strong coupling characteristics of the EMU rectifier. Since most electric locomotives and high-speed EMUs c...

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Application Information

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IPC IPC(8): H02M7/217
CPCH02M7/217
Inventor 刘志刚胡鑫烜
Owner SOUTHWEST JIAOTONG UNIV
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