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Parallel-connection settable hardware protection device for active power filter (APF)

A power filter and hardware protection technology, applied in active power filtering, emergency protection circuit devices, harmonic reduction devices, etc., can solve the problems of large capacitor overvoltage cannot be effectively protected, and the protection circuit is not positioned, so as to achieve easy maintenance. , the effect of simple circuit

Active Publication Date: 2014-08-13
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that the protection circuit of the IPM in the APF is not set when it fails and the prior art cannot effectively protect the large capacitor overvoltage on the IPM DC side, the present invention provides a parallel active power filter that can set the hardware protective device

Method used

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  • Parallel-connection settable hardware protection device for active power filter (APF)
  • Parallel-connection settable hardware protection device for active power filter (APF)
  • Parallel-connection settable hardware protection device for active power filter (APF)

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Embodiment Construction

[0020] A parallel active power filter resettable hardware protection device, including intelligent power module IPM fault protection and alarm circuit, intelligent power module IPM DC side capacitor overvoltage protection and alarm circuit, fault signal processing circuit and intelligent power module IPM Fault signal four-in-one circuit; the intelligent power module IPM fault signal four-in-one circuit contains four photocouplers PC817, the 1 pins of the four photocouplers PC817 are respectively connected to 15V DC, and the four photocouplers PC817 The 2 pins are respectively connected to the four fault signals UF0, VF0, WF0, and NF0 of the intelligent power module IPM, the 3 pins of the four photocoupler PC817 are grounded, and the 4 pins are connected and output the Fault signal; the intelligent power module IPM protection and The alarm circuit includes an IPM fault signal input module, a reset module, and a fault signal output module. The IPM fault signal input module contai...

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Abstract

The invention relates to a hardware protection device for an active power filter (APF), and in particular relates to a settable hardware protection device for an APF. The settable hardware protection device comprises an intelligent power module (IPM) fault protection and alarm circuit, an IPM direct-current-side capacitance overvoltage protection and alarm circuit, a fault signal processing circuit and an IPM fault signal quadruple circuit. The settable hardware protection device successfully solves the problems that the IPM protection circuit in the APF is not settable when having faults and the direct-current-side high-capacitance overvoltage of the IPM cannot be effectively protected in the prior art, and the settable hardware protection device is simple in circuit and easy to maintain.

Description

technical field [0001] The invention relates to a hardware protection device of an active power filter, in particular to a hardware protection device which can be set for a parallel active power filter. Background technique [0002] In recent years, with the wide application of power electronics technology, electric energy has been more fully utilized. However, the nonlinear characteristics of power electronic devices also distort the voltage and current of the power grid. The increasing number and rated capacity of these highly nonlinear devices have made the problem of harmonic pollution in the power system increasingly serious, and it has become a problem that affects power quality. The public nuisance has a great impact on the safety and economic operation of the power system. [0003] For the problem of suppressing harmonic pollution, there are many kinds of methods, but they can be divided into two ideas: one is to use compensation devices to suppress harmonic polluti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H7/16H02J3/01
CPCY02E40/22Y02E40/40Y02E40/20
Inventor 李岚康增尚曹效霞
Owner TAIYUAN UNIV OF TECH
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