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Bridge type series, parallel and mixture connection electric energy regulator based on IGBT

A regulator and bridge-type technology, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve problems such as low adjustment accuracy and poor control reliability, and achieve good compensation effects, less maintenance, and long working life Effect

Inactive Publication Date: 2009-03-25
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low adjustment accuracy and poor control reliability during transients in current electric energy compensation, the present invention proposes an IGBT bridge-type series and parallel supplementary electric energy regulator

Method used

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  • Bridge type series, parallel and mixture connection electric energy regulator based on IGBT
  • Bridge type series, parallel and mixture connection electric energy regulator based on IGBT
  • Bridge type series, parallel and mixture connection electric energy regulator based on IGBT

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Embodiment Construction

[0013] The system block diagram based on IGBT bridge series and parallel supplementary power regulator adopting EPWM control strategy is as follows: figure 1 As shown, it is mainly composed of two parts, the main circuit and the control circuit. The main circuit consists of a parallel IGBT bridge converter 1, a parallel L, C circuit 2, a series compensation transformer 3 and a series IGBT bridge converter 4, and the parallel IGBT bridge converter 1 consists of T 5 , T 6 , T 7 , T 8 Four IGBTs, equalizing resistor R 3 , R 4 , energy storage electrolytic capacitor C 3 、C 4 Its main function is to perform dynamic harmonic compensation to the power grid. Since the parallel-connected IGBT bridge converter 1 passes through the transformer Tr2 in the parallel-connected L and C circuit 2 (its proportional coefficient is k 2 ) is connected to the power grid, so it does not bear harmonic voltage, and can be used for harmonic filtering of high-voltage power grid; parallel-connecte...

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Abstract

The invention relates to an IGBT-based bridge-type serial-parallel compensating power regulator, wherein a digital signal processor DSP performs real-time detection on an input network voltage; when the variation of the amplitude value of the voltage is detected, the DSP controller controls a bridge-type voltage converter to generate a corresponding voltage so as to perform series compensation on the input voltage, thereby the voltage of a distribution network is automatically adjusted and the stability of a load voltage is maintained; and when the wavy distortion of a network current is detected, the DSP controller controls a bridge-type current converter to generate a reverse current so as to perform parallel compensation on the network current, thereby improving the waveform of the network current. Therefore, the IGBT-based bridge-type serial-parallel compensating power regulator not only can inhibit the interference of dropping and rising of the network voltage on power consumers but also can improve the waveform of the current, and actually improves the power quality of a power system in all aspects.

Description

technical field [0001] The invention relates to a power control technology, in particular to an IGBT bridge-type series and parallel supplementary power regulator. Background technique [0002] Since the electricity capacity of the power grid voltage changes at any time, its voltage fluctuates greatly, manifested as frequent overvoltage and undervoltage, instantaneous drop, surge and spike interference (especially serious in some remote areas); on the other hand, nonlinear power systems The large increase in load has injected a large number of harmonic and sub-harmonic components into the grid, resulting in serious distortion of the current waveform and serious pollution to the grid, thereby affecting the quality of electricity for users. With the development of science and technology and economy, and the application of information technology and microelectronics technology, a large number of electrical equipment have higher and higher requirements for power supply quality. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/30H02J3/01
CPCY02E40/40
Inventor 江友华曹以龙唐忠
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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