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STATCOM current tracking and compensation method

A compensation method and current tracking technology, applied in reactive power adjustment/elimination/compensation, flexible AC transmission systems, etc., can solve the problems of fast response speed and high switching frequency of switching devices, achieve fast dynamic response speed, maintain balance and Stable and efficient effect

Inactive Publication Date: 2013-04-24
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Abstract
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Problems solved by technology

The response speed of direct current control is fast, but the switching frequency of the switching device is high

Method used

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  • STATCOM current tracking and compensation method
  • STATCOM current tracking and compensation method

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Embodiment Construction

[0024] The specific implementation of the present invention will be described in further detail below by describing the embodiments with reference to the accompanying drawings, so as 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.

[0025] like figure 1 , figure 2 The technical solution of the present invention shown: the present invention is a STATCOM current tracking compensation method.

[0026] In order to solve the problems existing in the prior art and overcome its defects, the following objectives of the invention are achieved:

[0027] In the case of system voltage asymmetry, the compensation current required by the system can be accurately detected, and the current required by the system can be quickly tracked and compensated. The technical solution adopted by the present invention is:

[0028] STATCOM current tracking compensation method of the p...

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Abstract

The invention discloses an STATCOM current tracking and compensation method. The method includes processing a three-phase voltage and a three-phase current which are gathered at point P, obtaining a transfer matrix as well as active current components and reactive current components of the current which needs to be compensated by a system, processing the current gathered by load side through transformation from a coordinate abc to a coordinate dq and a low pass filter, obtaining direct current components on q axis of the STATCOM reference current, outputting the direct current components as active components of the reference current in the voltage proportional integral cycle of the STATCOM direct current capacitance and voltage, controlling the active components and reactive components of the compensated current through fuzzy proportional plus integral (PI) control, producing control signal through the technique of space vector pulse width modulation (SVPWM), and controlling the output of STATCOM. The STATCOM current tracking and compensation method has the advantages that influence on STATCOM performance caused by asymmetry of the three-phase voltage of the system is overcome, current needed to be compensated by the system is detected accurately, and the current needed to be compensated by the system is tracked and compensated quickly and effectively.

Description

technical field [0001] The invention belongs to the technical field of power electronic device control. Specifically, the present invention relates to a STATCOM current tracking compensation method. Background technique [0002] The compensation current detection method of STATCOM widely adopts the traditional ip-iq calculation method based on instantaneous reactive power and its improved method. [0003] The principle of the traditional ip-iq detection compensation current method is as follows: image 3 As shown, the basic steps are as follows: collect A-phase voltage Ua, obtain the phase angle of Ua through a phase-locked loop (PLL), and generate sine and cosine signals with the same phase as Ua by it, and get C = sin ωt - cos ωt - cos ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18
CPCY02E40/16Y02E40/10
Inventor 陈其工鲍学礼高文根邵可可王俊杰连磊陈海艳
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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