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VIENNA rectifier modulation method, controller and system for amending injected zero-sequence component

A technology of zero-sequence component and modulation method, which is applied in the direction of converting AC power input to DC power output, output power conversion device, electrical components, etc., which can solve problems such as harmonic increase, reduce design capacity, and expand applications Occasions, the effect of simplifying the VIENNA modulation method

Inactive Publication Date: 2016-11-30
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention can solve the problem of harmonic increase caused by the lagging voltage of the input current and the polarity difference between the current and the reference voltage

Method used

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  • VIENNA rectifier modulation method, controller and system for amending injected zero-sequence component
  • VIENNA rectifier modulation method, controller and system for amending injected zero-sequence component
  • VIENNA rectifier modulation method, controller and system for amending injected zero-sequence component

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Embodiment Construction

[0045] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0046] as figure 1 The three-level VIENNA rectifier structure shown illustrates the rectifier control strategy.

[0047] Three-level VIENNA rectifier, including three-phase bridge arms connected in parallel, each phase bridge arm includes two fast recovery diodes in series, and the equivalent bidirectional switch S is connected in series on the midpoint side of each phase bridge arm a , S b , S c , that is, two IGBT tubes with different directions, and the other side is connected to the grid through a filter; two capacitors C with the same capacitance are connected to the input ends of each bridge arm in parallel 1 、C 2 ; The midpoint O of the discrete capacitor is connected to the other side of the IGBT tube with different directions of the bridge arms of each phase; the midpoint of the two capacitors is connected to the other end of the IGBT tubes with ...

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Abstract

The invention discloses a VIENNA rectifier modulation method, a VIENNA rectifier controller and a VIENNA rectifier control system for amending an injected zero-sequence component. The modulation method comprises the steps of amending instant polarity of a reference voltage according to an input current; computing the zero-sequence component of the amended reference voltage; injecting the zero-sequence component and computing a duty ratio corresponding to the reference voltage; and generating a PWM-driven VIENNA rectifier based on double carriers. The method, controller and system provided by the invention are simple, convenient, efficient and prone to be implemented in a numerical manner, so that the VIENNA rectifier has input and output with high quality, and is efficient, stable in operation, and greatly expanded in application occasions of the VIENNA rectifier.

Description

technical field [0001] The invention belongs to the field of power electronics, and in particular relates to a VIENNA rectifier modulation method, controller and system for correcting and injecting zero-sequence components. Background technique [0002] The three-phase three-level three-switch rectifier, that is, the VIENNA rectifier, can realize input unit power factor correction, has the advantages of low switching loss and small electromagnetic interference, and has simple circuit structure, small number of switches, and no bridge arm through-through. Research hotspots. [0003] The voltage space vector of the VIENNA rectifier is determined by the switch state and the current polarity. However, due to the effect of inductive loads such as inductance in the circuit, the input grid current lags behind the voltage, and the polarity of the input current and the reference voltage is different. Still using the original reference voltage will generate a wrong voltage space vect...

Claims

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Application Information

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IPC IPC(8): H02M7/219H02M1/12
CPCH02M1/12H02M7/219H02M1/0006
Inventor 张承慧段彬刘家君丁文龙
Owner SHANDONG UNIV
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