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Power Modules for Modular Active Filters

A source filter and power module technology, applied in active power filter, harmonic reduction device, AC network to reduce harmonic/ripple, etc., can solve the problem that the active filter is not very mature, the compensation capacity needs to be improved, etc. problems, to achieve the effect of easy parallel expansion, simple and reliable structure, and fast speed

Inactive Publication Date: 2011-12-28
JIANGSU DESHUNXIANG ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The order and size of harmonics in the power system change with the system load conditions. The use of traditional LC static filters cannot meet the requirements, but the use of power active filters can dynamically control the harmonics and reactive power that change in size and frequency. compensation, so the research and application of active filters are getting more and more attention
[0004] However, the existing technology of active filters is not very mature, and the compensation capacity needs to be improved, and the modular active filter is a new development direction proposed in recent years

Method used

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Embodiment Construction

[0012] Attached below figure 1 And specific embodiment, further clarifies content of the present invention:

[0013] as attached figure 1 As shown, the power module of the modular active filter is composed of electrolytic capacitor 1, complex programmable logic device (CPLD) control circuit 2, module power supply 5, drive module 3 and insulated gate bipolar transistor (IGBT) module 4. Among them, the output of the module power supply 5 is connected to the complex programmable logic device (CPLD) control circuit 2 and the drive module 3, the output of the complex programmable logic device (CPLD) control circuit 2 is connected to the drive module 3, and the drive module 3 drives the insulated gate bipolar Type transistor (IGBT) module 4 is turned on and off, thereby controlling the compensation current and controlling the voltage held by the electrolytic capacitor 1 .

[0014] The complex programmable logic device (CPLD) control circuit 2 has dead zone protection and anti-thro...

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Abstract

The invention discloses a power module for active power filtering of a distribution network, which is composed of an electrolytic capacitor, a complex programmable logic device (CPLD) control circuit, a module power supply, a drive module and an insulated gate bipolar transistor (IGBT) module; The entire power unit of the present invention is installed on a heat sink, the structure is simple and reliable, it is convenient for parallel expansion, and the production and installation are convenient and simple; among them, the complex programmable logic device (CPLD) has dead zone protection and anti-shoot-through protection, which is better than software protection. The speed is faster and the safety of device operation is improved.

Description

technical field [0001] The invention belongs to the technical field of active filters for improving power quality, in particular to a power module of a modular active filter. Background technique [0002] The rapid development of power electronic technology makes various power electronic devices widely used in industry, transportation and household, and the harm of harmonics brought by these nonlinear loads is also becoming more and more serious. Harmonics cause harmonic loss of components in the power grid, reduce equipment efficiency and power factor, and even damage power equipment such as capacitors; harmonics affect precision instruments and adjacent communication systems, making them unable to work normally. [0003] The order and size of harmonics in the power system change with the system load conditions. The use of traditional LC static filters cannot meet the requirements, but the use of power active filters can dynamically control the harmonics and reactive po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01
CPCY02E40/22Y02E40/40Y02E40/20
Inventor 姜筱锋
Owner JIANGSU DESHUNXIANG ELECTRIC
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