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A rectifier multiple control method

A control method and rectifier technology, applied in the field of rectifiers, can solve problems such as power grids, resonance phenomena, and unsatisfactory rectifier grid-side harmonic performance, so as to suppress grid resonance, improve harmonic performance, and reduce total harmonic distortion THD Effect

Active Publication Date: 2019-12-20
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to provide a rectifier multiple control method to solve the technical problems of unsatisfactory rectifier network side harmonic performance and prone to grid resonance phenomenon under the control of the existing control method

Method used

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  • A rectifier multiple control method
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Embodiment Construction

[0043] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0044] The embodiment of the present invention provides a rectifier multiple control method, such as figure 1 As shown, the method includes step 101, step 102, step 103 and step 104. Wherein, in step 101, a unified voltage loop control is adopted for multiple rectifiers, and set current and voltage control signals are obtained according to the DC voltage and set voltage of the multiple rectifiers. In step 1...

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Abstract

The invention discloses a multiple control method for a rectifier, belongs to the technical field of the rectifier, and solves the technical problems of non-ideal grid side harmonic performance and high probability of power grid resonance phenomenon of the rectifier in the existing control method. The multiple control method for the rectifier comprises the steps of obtaining set current and voltage control signals according to direct current voltages and set voltages of multiple rectifiers; performing harmonic suppression processing on input currents of the multiple rectifiers, and obtaining current control signals according to processed signals and set currents; generating modulation wave based on the voltage control signals, the current control signals and the power grid voltage; and performing carrier phase-shifting SPWM modulation according to the modulation wave to generate pulse signals so as to control the multiple rectifiers.

Description

technical field [0001] The invention relates to the technical field of rectifiers, in particular to a multiplexed control method for rectifiers. Background technique [0002] With the rapid development of my country's railway industry, a large number of electric locomotives and EMUs with AC transmission have been put into use. Electric locomotives and EMUs generally use AC-DC-AC technology to drive AC motors. As the AC-DC link of the vehicle-mounted converter, the rectifier generally adopts a multiple scheme in which multiple rectifiers are connected in parallel based on considerations of power expansion, harmonic suppression, and system reliability. [0003] The current multiple control of rectifiers generally adopts the carrier phase-shift SPWM technology. On the basis of the carrier phase shift, a unified voltage loop and an independent current loop control method are used for each level. The use of carrier phase-shifting SPWM technology solves the contradiction between ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/217H02M1/12
Inventor 冯江华尚敬张志学罗文广付刚章志兵梅文庆陈志博胡景瑜彭赟
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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