Double parallel active power filtering apparatus

A power filtering and paralleling technology, used in active power filtering, harmonic reduction devices, and AC networks to reduce harmonics/ripples, etc., and can solve problems such as network resonance loss

Inactive Publication Date: 2012-06-13
NORTHEASTERN UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, basically all soft switching technologies are based on the principle of resonance, but a network with resonance will inevitably generate resonance loss

Method used

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Embodiment Construction

[0083] The present invention will be further described below in conjunction with the accompanying drawings.

[0084] The dual-parallel active power filter device of the present invention includes DSP, power supply, voltage and current sampling module, serial port communication module, IGBT gate drive circuit, high-frequency APF circuit and low-frequency APF circuit, and the voltage and current sampling module adopts voltage transformer PT and current Transformer CT is used to detect voltage and current. HDC500E Hall current transformer and HNV-300V Hall voltage transformer are selected. TMS320F2812 is selected for DSP and MAX3232 is selected for serial communication chip.

[0085] Setting device parameter of the present invention is as follows:

[0086] The capacity of the main circuit: the capacity S of the three-phase system active power filter device A Defined as S=3EI c . Double-parallel active power filter device of the present invention, I c Including two parts, one ...

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Abstract

The invention provides a double parallel active power filtering apparatus which comprises a DSP, a power supply, a voltage current sampling module, a serial port communication module, an IGBT gate pole drive circuit, a high frequency APF circuit and a low frequency APF circuit. An input terminal of the voltage current sampling module is connected to an electrical network, and an output terminal of the voltage current sampling module is connected to a DSP pin. An output of the DSP is connected to a pin of the IGBT gate pole drive circuit. An output of the IGBT gate pole drive circuit is connected to an IGBT of the high frequency APF circuit and the low frequency APF circuit respectively. The high frequency APF circuit and the low frequency APF circuit are connected to the electrical network back. The power supply and the serial port communication module are externally connected to a DSP port. A voltage transformer is in parallel connection with a current transformer to acquire a signal, a high frequency circuit is parallel connection with a low frequency circuit and the signal is returned to the electrical network, the DSP is taken as a processing unit, a harmonic wave is effectively filtered, and electrical network current is accurately tracked. A soft switch drives the IGBT gate pole drive circuit, zero voltage zero current connection and disconnection of the IGBT are realized, resonance loss is reduced effectively, and precision is raised.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and in particular relates to a dual-parallel active power filtering device. Background technique [0002] With the rapid development of power electronics technology, digital circuits have gradually replaced traditional analog circuits. The active power filter system based on digital signal processing chip (DSP) has the advantages of fast, stable and accurate in a series of links such as electrical signal sampling, harmonic detection, current tracking control and PWM pulse generation, so it is widely used. Today's technology requires power electronic devices to be miniaturized and lightweight. At the same time of miniaturization and weight reduction, problems such as switching loss and electromagnetic interference caused by high-frequency switching must be solved. Soft switch technology is developing towards the direction of solving the above-mentioned contradictions. At present,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01H02J3/18
CPCY02E40/40Y02E40/22Y02E40/20
Inventor 杨东升张化光赵庆杞冯健杨轶王智良刘鑫蕊罗艳红杨珺王迎春孙秋野贾岩王芳芳
Owner NORTHEASTERN UNIV
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