A Nonlinear Passive Current Control Method

A current control and nonlinear technology, applied in the field of electronics, can solve the problems of exceeding THD, low current accuracy, and low sine degree of the total AC input current of the hybrid rectifier, so as to reduce the influence and improve the control accuracy.

Inactive Publication Date: 2021-08-17
BEIJING INFORMATION SCI & TECH UNIV
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Problems solved by technology

[0004] Although this hybrid rectifier has advantages in energy efficiency, power density, capacity, etc., the accuracy of the current tracking control method is not high, resulting in a low sinusoidal degree of the total AC input current of the hybrid rectifier, resulting in THD exceeding "GB / T 14549- 1993, "Power Quality-Public Power Grid Harmonic Specified Index", these factors affect the performance of the hybrid rectifier and limit its popularization and application

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  • A Nonlinear Passive Current Control Method
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  • A Nonlinear Passive Current Control Method

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[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0027] In order to facilitate the understanding of the embodiments of the present invention, further explanations will be given below with specific embodiments in conjunction with the accompanying drawings, which are not intended to limit the embodiments of the present invention.

[0028] In the embodiment of the present invention, the hybrid...

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Abstract

The embodiment of the present invention relates to a nonlinear passive current control method, which is applied to a new hybrid rectifier. The new NTLUTHR includes a SSTPBR circuit and is composed of a three-level unidirectional T-type rectifier (TLUTR) connected in parallel, wherein, in the The AC input end of the SSTPBR circuit is connected in series with a compensation inductance, and the method includes: controlling the TLUTR circuit based on a new EL type passive current control algorithm of the TLUTR converter; controlling the SSTPBR based on a new EL type passive current control algorithm of the SSTPBR converter circuit.

Description

technical field [0001] The embodiments of the present invention relate to the field of electronic technology, and in particular to a nonlinear passive current control method. Background technique [0002] In recent years, hybrid rectifiers with unit power factor, high power density, low cost, simple structure, and suitable for medium and high voltage applications have become the research hotspots of scholars at home and abroad. The hybrid rectifier is composed of a line-commutated converter (LCC) and a self-commutated converter (SCC) connected in parallel. The LCC used is a three-phase uncontrolled rectifier cascaded with a symmetrical Boost circuit to form an SSTPBR; the SCC uses a VIENNA rectifier or a multi-level PWM rectifier composed of bidirectional switches with different topological structures. [0003] The hybrid rectifier is characterized by the combination of two rectifiers, which can improve the energy efficiency of the system by optimizing energy distribution, ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/23H02M3/155
CPCH02M3/155H02M7/23
Inventor 李萍王久和
Owner BEIJING INFORMATION SCI & TECH UNIV
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