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Nonlinear passive current control method

A current control and non-linear technology, applied in the electronic field, can solve the problems of low current accuracy, THD exceeding, affecting the performance of hybrid rectifiers, etc., and achieve the effect of improving control accuracy and reducing the impact

Inactive Publication Date: 2020-07-24
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

Method used

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Embodiment Construction

[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 invention relates to a nonlinear passive current control method which is applied to a novel hybrid rectifier. A novel NTLUTHR is composed of an SSTPBR circuit and a three-level one-way T-type rectifier (TLUTR) which are connected in parallel. A compensation inductor is connected to an alternating current input end of the SSTPBR circuit in series. The method comprises the following steps: controlling the TLUTR circuit based on a TLUTR converter EL-type passive current control new algorithm; and controlling the SSTPBR circuit based on a SSTPBR converter EL type passive current control new algorithm.

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 Applications(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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