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Three-phase four-wire uninterrupted power supply device with function of active filter

A three-phase four-wire, source filter technology, applied in the direction of circuit devices, harmonic reduction devices, battery circuit devices, etc., can solve the problem of inability to eliminate power grids, pollution, reactive components, harmonic components and unbalanced component compensation and other issues to achieve the effect of eliminating pollution

Inactive Publication Date: 2014-01-08
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing device cannot compensate the reactive component, harmonic component and unbalanced component generated by the user's electrical load when the power grid is normally powered, and cannot eliminate the pollution of the grid-connected current of these components to the grid. Provides a three-phase four-wire uninterruptible power supply device with active filter function

Method used

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  • Three-phase four-wire uninterrupted power supply device with function of active filter
  • Three-phase four-wire uninterrupted power supply device with function of active filter
  • Three-phase four-wire uninterrupted power supply device with function of active filter

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specific Embodiment approach 1

[0010] Specific implementation mode one: the following combination figure 1 Describe the present embodiment, the three-phase four-wire uninterruptible power supply device with active filter function described in the present embodiment, it includes grid 101, user's electric load 102, storage battery pack 103, DC stabilized voltage circuit 104, three-phase Four-wire inverter 105, digital signal processing control unit 106, circuit breaker 108, first detector 107 and second detector 109, the DC voltage output terminal of battery pack 103 is in phase with the DC voltage input terminal of DC voltage stabilizing circuit 104 connection, the DC voltage output terminal of the DC voltage stabilizing circuit 104 is connected to the DC voltage input terminal of the three-phase four-wire inverter 105, and the three-phase voltage output terminal of the AC side of the three-phase four-wire inverter 105 passes through the circuit breaker 108 Connected to the power grid 101, the DC power conve...

specific Embodiment approach 2

[0011] Specific implementation mode two: the following combination figure 2 This embodiment will be described. This embodiment will further describe the first embodiment. The three-phase four-wire inverter 105 includes a DC side capacitor 201, a four-leg voltage source converter 202, a drive circuit 203, and an LC-type filter output circuit. 206, the LC-type filter output circuit 206 includes four filter output circuit inductors 204 and four filter output circuit capacitors 205, and the four bridge arms of the four-arm voltage source converter 202 are composed of four pairs of fully-controlled power devices IGBT, The emitter of the first fully-controlled power device IGBT of each bridge arm is connected to the collector of the second fully-controlled power device IGBT and one end of a filter output circuit inductor 204 at the same time, and the other end of each filter output circuit inductor 204 One end is respectively connected to one end of a filter output circuit capacito...

specific Embodiment approach 3

[0012] Specific implementation mode three: the following combination figure 2 Describe this implementation mode, this implementation mode will further explain the second implementation mode, among the four groups of driving signals of the driving circuit 203, each group of driving signals has two driving signals, which are respectively connected with two full-control type driving signals forming a bridge arm The base of the power device IGBT is connected.

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Abstract

The invention relates to a three-phase four-wire uninterrupted power supply device with a function of an active filter, which belongs to the technical field of multifunctional uninterrupted power supply devices. The three-phase four-wire uninterrupted power supply device aims to solve the problems that a reactive component, a harmonic component and an unbalanced component which are generated by a user electric load cannot be compensated during normal power supply of a power grid and pollution to the power grid due to grid-connected current of the components cannot be eliminated by the existing device. The three-phase four-wire uninterrupted power supply device comprises the power grid, the user electric load, a storage battery, a direct current voltage stabilizing circuit, a three-phase four-wire inverter, a digital signal processing control unit, a circuit breaker, a first detector and a second detector, wherein the first detector is used for detecting the output phase current of the alternating-current side of the three-phase four-wire inverter and the input voltage and current of the user electric load, and the second detector is used for detecting the output voltage and current of the storage battery. The three-phase four-wire uninterrupted power supply device is used for three-phase four-wire uninterrupted power supply devices in computer systems, aviation management systems, satellite systems and systems for precise instruments, scientific research, hospitals, banks, insurance and the like.

Description

technical field [0001] The invention relates to a three-phase four-wire uninterruptible power supply device with the function of an active filter, and belongs to the technical field of multifunctional uninterruptible power supply devices. Background technique [0002] At present, the known three-phase four-wire uninterruptible power supply device is composed of a battery pack, a three-phase inverter, a power frequency transformer, an output filter circuit, a control system and corresponding protection. With the rapid development of various industries and fields, higher and higher requirements are put forward for the quality of power supply, especially for important systems with strong real-time requirements, important departments and important electrical equipment that require uninterruptible power supply. Support, three-phase four-wire uninterruptible power supply devices are widely used in computer systems, aviation management systems, satellite systems, precision instrume...

Claims

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Application Information

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IPC IPC(8): H02J9/06H02J7/02H02J3/01
CPCY02E40/40
Inventor 祖光鑫宿海涛赖建明周尔逊肖楠高宇斌马莹
Owner STATE GRID CORP OF CHINA
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