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A control method for widening the range of reactive power adjustment at the input side of parallel-connected dual-stage matrix converters

A matrix converter and power regulation technology, applied in output power conversion devices, conversion equipment for intermediate conversion to DC conversion, high-efficiency power electronic conversion, etc. Achieve the effect of unity power factor correction

Active Publication Date: 2018-08-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In extreme cases, when the output side is unloaded, the input side current amplitude is zero. No matter how the angle is adjusted, the active power and reactive power at the TSMC input end are zero. In this case, the power supply current is only generated by the filter capacitor The capacitive reactive component of the power supply current is not zero, but its power factor is zero

Method used

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  • A control method for widening the range of reactive power adjustment at the input side of parallel-connected dual-stage matrix converters
  • A control method for widening the range of reactive power adjustment at the input side of parallel-connected dual-stage matrix converters
  • A control method for widening the range of reactive power adjustment at the input side of parallel-connected dual-stage matrix converters

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Embodiment Construction

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0034] (1) Basic principles

[0035] The topology of the main power part of the parallel dual-stage matrix converter is as follows: figure 1 As shown, it includes two dual-stage matrix converter units, denoted as the first dual-stage matrix converter module unit M and the second dual-stage matrix converter module unit S, both of which use a shared input LC filter, L s and C s are the inductance and capacitance values ​​of the input filter respectively, and the angular frequency and effective value of the input voltage are ω in and U in ...

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Abstract

The invention discloses a method for controlling a parallel type two stage matrix converter widened inlet side reactive power adjusting scope. According to the method, when a system is in light load or no load, a distribution mode of two parallel two stage matrix converter module units is adjusted for a load active power, a circulation power is constructed between modules, sum of absolute values of active powers of the two parallel two stage matrix converter module units is enhanced, so the two stage matrix converter module units are enabled to have capability at an input side to provide sufficient reactive power to offset capacitive reactive power generated by an input filtering capacitor, so a parallel two stage matrix converter system in a full power scope is enabled to correct an input power factor to be 1 in a rated load, a light load or no load and in an energy feedback state.

Description

technical field [0001] The invention relates to a control method of a matrix converter, in particular to a control method for adjusting reactive power at the input side of a parallel dual-stage matrix converter under light load or no-load conditions, and belongs to the field of power electronics technology and control technology . Background technique [0002] In recent years, the two-stage matrix converter (TSMC) developed based on the concept of matrix converter (MC) has received extensive and continuous attention and research from scholars at home and abroad. It has a compact structure , low switching loss, high power density and other significant advantages. TSMC has a separate rectification stage and inverter stage structure. Compared with traditional MC, it also has the advantages of simple commutation, and the rectification stage can realize zero-current commutation. [0003] Expanding modular topological units with the same internal structure through series and par...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42H02M5/44
CPCY02B70/10
Inventor 秦显慧周波韩娜李业
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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