Current limiting type dynamic voltage restorer and uninterrupted power supply method thereof

A dynamic voltage recovery, current-limiting technology, used in emergency protection circuit devices for limiting overcurrent/overvoltage, AC network voltage adjustment, electrical components, etc., to improve the utilization rate and cost performance, output voltage harmonic content Low, the effect of enhancing security and reliability
CN104882890AActive Publication Date: 2015-09-02ZHUZHOU NAT ENG RES CENT OF CONVERTERS
9 Cites 10 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
Publication Date
2015-09-02

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a current limiting type dynamic voltage restorer and an uninterrupted power supply method thereof; the restorer comprises a current transformer, an A-phase cascade transformer, a B-phase cascade transformer, and a C-phase cascade transformer; the primary side input ends of the A,B and C phase transformers are respectively connected with A phase, B phase and C phase of a power supply, and primary side output ends are respectively connected with a load; A phase, B phase and C phase of an output end of the current transformer are respectively connected in series with secondary sides of the A,B and C phase transformers. The current limiting type dynamic voltage restorer is connected between a power grid and the load in a cascade manner, thus realizing dynamic compensation for the power grid voltage, and limiting power grid short circuit fault current. The uninterrupted power supply method comprises an IGBT bypass work mode, a thyristor follow current work mode and a machinery switch bypass work mode, thus enhancing power grid safety and reliability, realizing load power supply continuity, and ensuring normal operation of the power grid and the load.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of power quality management methods, in particular to a current-limiting dynamic voltage restorer and an uninterrupted power supply method thereof. Background technique

[0002] With the development of science and technology, the society's demand for electricity is also increasing, and the requirements for power quality are also getting higher and higher. A large number of statistical data show that voltage sag is a type of dynamic power quality problem with the highest frequency, the most serious impact, and the largest economic loss. The most direct impact of voltage drop on equipment is that because the voltage is lower than the rated voltage, when the drop lasts for a long time, the equipment cannot get enough energy and cannot work normally; Exit operation; for most microcomputers and microelectronic control equipment, the recovery process of voltage drop will cause the restart of the microcomputer. On the othe...

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