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DSP control static power-free generator based on IGBT module and control method therefor

A static var and generator technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, etc., can solve problems such as small operating range, high harmonic content, and large volume

Inactive Publication Date: 2005-12-21
HUNAN UNIV
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AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of existing reactive power compensation devices, such as excessive volume, high harmonic content, and small operating range, the present invention provides a DSP-controlled static var based on IGBT modules with fast adjustment speed, wide operating range, and small harmonic content. generator

Method used

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  • DSP control static power-free generator based on IGBT module and control method therefor
  • DSP control static power-free generator based on IGBT module and control method therefor
  • DSP control static power-free generator based on IGBT module and control method therefor

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Embodiment Construction

[0029] like figure 1 As shown, the present invention is composed of a main circuit and a control circuit. The main circuit is composed of a three-phase rectifier bridge, a DC filter, an inverter power module, a low-pass filter, and an isolation transformer. The three-phase rectifier bridge, a DC filter, and an inverter The inverter power module, low-pass filter, and isolation transformer are connected in series in sequence. The three-phase rectifier bridge rectifies the three-phase AC power of the grid, and after being filtered by the DC filter, it is sent to the input end of the inverter power module. The inverter power module Inverted into three-phase alternating current, the three-phase alternating current is filtered by a low-pass filter, and then sent back to the grid by an isolation transformer. The control circuit includes a first acquisition circuit, a first DSP controller, a second DSP controller, a photoelectric isolation input and output circuit, a single-chip contr...

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Abstract

The disclosed method includes main circuit and control circuit. The main circuit is composed of cascaded three-phase rectification bridge, DC filter, power module of inverter, low pass filter and isolating transformer. The control circuit includes first collection circuit, first DSP controller, opto-electronic isolated I / O circuit. The first collection circuit collects three-phase current of electric network. Collected data are input to first DSP controller. Calculating process is carried out for the collected data by the first DSP controller. Through isolated I / O circuit, output PWM control pulse is sent to control end of the power module of inverter. Using DSP as main chip of controller, the invention possesses features of small size, quick adjustment speed, wide operation range, and small content of harmonic wave in compensating current.

Description

technical field [0001] The invention relates to a reactive power compensation device, in particular to a DSP-controlled static var generator based on an IGBT module. Background technique [0002] Modern power systems may have insufficient reactive power and excess reactive power under different operating modes. The loads of various power supply systems will also bring pollution and interference to the power supply system due to their nonlinear and unbalanced power consumption characteristics. Reactive power compensation is required. At present, reactive power compensation capacitors and impedance-controlled reactive power compensation devices SVC in FACTS equipment are mainly used in the field of reactive power compensation. Yougong compensation capacitors can improve circuit parameters, reduce line inductive reactive power, compensate system reactive power, and improve voltage quality. The disadvantage is that it can only compensate fixed reactive power, and it may also r...

Claims

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Application Information

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IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 罗安唐杰周柯范瑞祥姚舜李欣然
Owner HUNAN UNIV
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