Method and device for controlling four-quadrant rectifier of locomotive traction converter

A four-quadrant rectifier and traction converter technology, which is applied in the direction of control of electromechanical transmission, motor generator control, output power conversion device, etc., can solve the problems of large amount of calculation and low control accuracy, and achieve error-free tracking , the control logic is satisfied, the effect of complete communication and protection functions

Inactive Publication Date: 2018-02-23
CRRC YONGJI ELECTRIC CO LTD
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Problems solved by technology

[0004] The invention solves the problems of low control precision and large amount of calculation in the existing four-quadrant rectifier control method of locomotive traction converter, and provides a four-quadrant rectifier control method and device of locomotive traction converter

Method used

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  • Method and device for controlling four-quadrant rectifier of locomotive traction converter

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Embodiment Construction

[0017] The four-quadrant rectifier control method of the locomotive traction converter is realized by the following steps:

[0018] 1) Collect the grid side voltage, current and DC bus voltage of the locomotive traction converter;

[0019] 2) Obtain the phase and amplitude of the grid-side voltage according to the collected grid-side voltage;

[0020] 3) Set the bus command voltage, compare the bus command voltage with the collected DC bus voltage, and then form a bus voltage closed loop through the PI controller (that is, use the bus command voltage and the collected DC bus voltage as the input of the PI controller) ;

[0021] 4) The output of the PI controller is multiplied by the phase of the grid-side voltage to obtain the command current in the same phase as the grid-side voltage;

[0022] 5) After the command current is compared (differenced) with the collected grid-side current, it enters the PR controller;

[0023] 6) After the output of the PR controller is compare...

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Abstract

The invention relates to a method for controlling a locomotive traction converter, and specifically relates to a method and a device for controlling a four-quadrant rectifier of the locomotive traction converter. The problem that the four-quadrant rectifier of an existing locomotive traction converter is low in control precision and large in calculated quantity is solved. The control method is realized through the following steps: (1) collecting the power grid side voltage, current and direct-current bus voltage of the locomotive traction converter; (2) obtaining the phase position and amplitude of the power grid side voltage; (3) setting bus command voltage, and after comparing the bus command voltage with the collected direct-current bus voltage, feeding the bus command voltage into a PIcontroller; (4) multiplying the output of the PI controller with the phase position of the power grid side voltage to obtain command current; (5) after comparing the command current with the collected power grid side current, entering into an PR controller; and (6) after comparing the output of the PR controller with the amplitude of the power grid side voltage, feeding the output of the PR controller into a pulse modulation module. The response speed and control precision of the system are greatly improved, and the data calculated quantity is reduced.

Description

technical field [0001] The invention relates to a control method of a locomotive traction converter, in particular to a control method and device for a four-quadrant rectifier of the locomotive traction converter. Background technique [0002] The four-quadrant locomotive traction converter can not only keep the power factor of the traction power supply network close to 1, but also make the grid-side current close to sinusoidal, which improves the economic benefits of the traction power supply network, reduces electromagnetic interference to the grid environment, and can realize energy feedback. It is widely used in electric locomotive transmission system. [0003] The prior art uses the Id_iq current decoupling vector control method to control the four-quadrant rectifier of the locomotive traction converter. This control method is a DC current control method after the vector transformation of the current by the PI controller, and the current A low-pass filter is usually ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/797H02P21/36
CPCH02M7/797H02P21/36H02M1/0012
Inventor 于森林张瑞峰李学亮张雅琨詹哲军牛剑博邹会杰
Owner CRRC YONGJI ELECTRIC CO LTD
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