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Control system and control method of three-phase three-level VIENNA rectifier

A control system and control method technology, applied in the field of power electronics, can solve problems affecting input current THD, etc., and achieve the effect of improving waveform quality

Pending Publication Date: 2018-02-02
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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Problems solved by technology

However, in practical applications, since the input power is usually not an ideal symmetrical voltage source, in this case, the input current of the three-phase PFC converter under the traditional single-cycle control theory will generate a large third harmonic component, thus Affect the input current THD (total harmonic distortion total harmonic distortion)

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  • Control system and control method of three-phase three-level VIENNA rectifier

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Embodiment Construction

[0028] Through the description of the embodiments below, the specific implementation of the present invention includes the shape, structure, mutual position and connection relationship between the various parts, the function and working principle of each part, the manufacturing process and the operation and use method of the various components involved. etc., to make further detailed descriptions to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions of the present invention.

[0029] Such as figure 1 is the main circuit topology diagram of the three-phase three-level VIENNA rectifier, where U a , U b , U c For the three-phase input power of the rectifier, L sa , L sb , L sc is the AC side inductance, i a i b i c is the input current on the AC side, S 1 , S 2 , S 3 is the switch tube, R L is the output load resistance, U dc is the output voltage of the DC side, c1 and c2 are the ...

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Abstract

The invention belongs to the technical field of electric power and electronic engineering and specifically relates to a control system and a control method of a three-phase three-level VIENNA rectifier. The provided control system and control method of a three-phase three-level VIENNA rectifier is aimed at solving the problem that the input current of three-phase PFC converter will produce large third harmonic component under the traditional one-cycle control theory. To solve the above technical problem, the invention provides the control system and control method of a three-phase three-levelVIENNA rectifier; the system attenuates the second harmonic component contained in the output signal of the voltage regulator and does not affect signals in other frequency bands. The invention effectively suppresses the large amplitude three-phase harmonic component of the three-phase input current and improves the quality of the rectifier input current waveform.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a control system and a control method of a three-phase three-level VIENNA rectifier. Background technique [0002] With the continuous development of power semiconductor devices and control technology, the application of power electronic equipment is becoming more and more extensive. Due to the inherent nonlinear characteristics of power electronic devices, most rectifier equipment will cause large current harmonics on the grid side. And lower power factor, in order to solve this problem, power factor correction circuit is more and more widely used. The three-phase three-level VIENNA rectifier is a kind of three-level Boost type neutral point clamped (neutral point clamped, NPC) structure converter, which has the advantages of simple circuit structure, small switch voltage stress, low input current harmonic content, and can Enter the advantages of unity pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/12H02M7/217H02M1/32
CPCH02M1/12H02M1/32H02M7/217Y02B70/10
Inventor 高文根王坤徐东何睿桑康伟杨运峰
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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