An emergency adjustment system for three-phase electric unbalance

A technology for regulating systems and three-phase electricity, applied in the direction of reducing the asymmetry of polyphase networks, eliminating/reducing asymmetry in polyphase networks, etc. problem, the effect of improving the three-phase electrical imbalance

Active Publication Date: 2021-09-28
STATE GRID CORP OF CHINA +2
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the power quality problem on the user side has been solved, the three-phase terminal voltage imbalance problem of the power grid has not been alleviated at the input end of the power system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An emergency adjustment system for three-phase electric unbalance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The present invention is described in further detail below:

[0021] see figure 1 , an emergency adjustment system for three-phase electrical unbalance, comprising a grid input unit, a DC battery unit, an AC output unit, a control unit, and a signal acquisition unit;

[0022] The grid input unit includes an input contactor KM1, an AC fuse FU1, a direct supply contactor KM2, and a load contactor KM4.

[0023] The electric DC battery unit includes a single-phase controllable rectifier S1, a filter reactor T1, a filter capacitor C1, an isolation diode D1, a DC switch K1, a DC fuse FU2, and a battery pack;

[0024] The AC output unit includes a three-phase full-bridge inverter S2, a filter reactor T2, and an output contactor KM3;

[0025] The signal acquisition unit is respectively connected with the voltage monitoring terminal P1 of the grid input circuit, the voltage and current monitoring terminal P2 of the battery pack, and the voltage and current monitoring terminal ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an emergency adjustment system for three-phase electric unbalance, which comprises a grid input unit, a DC battery unit, an AC output unit, a control unit, and a signal acquisition unit; the grid input unit includes an input contactor, an AC fuse, a direct supply Contactors, load contactors; DC battery units include single-phase controllable rectifiers, filter reactors, filter capacitors, isolation diodes, DC switches, DC fuses, battery packs; AC output units include three-phase full-bridge inverters , filter reactor, and output contactor; the signal acquisition unit is respectively connected to the voltage monitoring terminal of the grid input circuit, the voltage and current monitoring terminal of the battery pack, and the voltage and current monitoring terminal of the three-phase full-bridge inverter; the control unit passes the signal The signal analysis of the acquisition unit controls the closing and opening of the corresponding contactors and switches, and outputs signals to the single-phase controllable rectifier and the three-phase full-bridge inverter for control.

Description

technical field [0001] The invention relates to the field of power supply quality, in particular to an emergency adjustment system for unbalanced three-phase electricity. Background technique [0002] Power quality is one of the main concerns in the field of power systems, especially the unbalanced three-phase terminal voltage is the key to power supply quality. It not only has an important impact on high-tech equipment related to automation, advanced control, and online services, but also Exacerbating the load on the grid throughout the region. Patent application CN110071572A "a bidirectional charging and discharging integrated emergency power supply device" is used at the user end in case of abnormal bypass power supply, the energy is provided by the DC battery, and the standard three-phase AC voltage is obtained through the emergency power inverter to supply power to important loads. Although the power quality problem on the user side has been solved, the three-phase ter...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/26
CPCH02J3/26Y02E40/50
Inventor 王喜刚魏璐刘玉奇樊秦华苏苗苗杨瑾冯浩贤侯梦瑾刘雯佳王延军孙顺顺樊刚张帆
Owner STATE GRID CORP OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap