A power quality optimization method for electric motor system

A technology of power quality and optimization methods, applied in control systems, control generators, vector control systems, etc., can solve problems such as little research on MC-PMSM systems

Active Publication Date: 2020-12-11
ZHEJIANG UNIV
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Problems solved by technology

[0006] Although the predecessors have done a lot of research on expanding the input reactive power range of the MC-PMSM system, they are all based on three-phase input and three-phase output, and there is little research on the MC-PMSM system with three-phase input and five-phase output

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  • A power quality optimization method for electric motor system
  • A power quality optimization method for electric motor system
  • A power quality optimization method for electric motor system

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Embodiment Construction

[0026] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] See figure 2 , figure 2 is the invention according to figure 1 The power quality optimization method proposed by the five-phase direct matrix converter-permanent magnet synchronous motor integrated system, as shown in the figure, the optimization method includes the following steps:

[0028] S1. According to the requirements of the input side and output side voltage vectors of the five-phase direct matrix converter, through coordinate transformation, calculate the modulation matrix expression containing free variables under the two-phase stationary coordinate system, and calculate the three-phase through coordinate inverse transformation - the modulation matrix expression under the five-phase stationary coordinate system, and superimpose the co...

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Abstract

The invention discloses a method for optimizing power quality of a motor system. The motor system is a five-phase direct matrix converter-permanent magnet synchronous motor integrated system. The optimization method is based on the generalized expression of the modulation matrix of the five-phase direct matrix converter And its constraints, the maximum input reactive power of the five-phase direct matrix converter under the constraints is realized. Thus, the algorithm of the present invention fills the blank of the five-phase matrix converter extended input reactive power range algorithm, and improves the input reactive power control range of the five-phase matrix converter-permanent magnet synchronous motor system.

Description

technical field [0001] The invention relates to the field of modulation algorithms for matrix converters, in particular to a modulation algorithm for extending the input reactive power range of a five-phase direct matrix converter-permanent magnet synchronous motor system. Background technique [0002] In recent years, matrix converter-permanent magnet synchronous motor (MC-PMSM) system has received more and more attention. Compared with the traditional AC-DC-AC converter, the system can improve the voltage and current quality of the input side, has energy feedback capability and higher power density. In addition, a very important advantage of this system is that it can control the input power factor within a certain range. By adjusting the input reactive power, not only the unit power factor operation of the system can be realized, but also reactive power can be provided to the grid to support the grid voltage and improve the power quality of the grid. Compared with tradi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/22H02P21/00H02J3/16
CPCH02J3/16H02P21/0003H02P21/22Y02E40/30
Inventor 邱麟李尧黄晓艳吴立建方攸同
Owner ZHEJIANG UNIV
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