Voltage dip compensation method of unified power quality conditioner with zero input active power

A technology of power quality and voltage sag, applied in the direction of reactive power adjustment/elimination/compensation, reactive power compensation, AC network voltage adjustment, etc., can solve limited effects, uncertain compensation duration recovery and restart, system voltage sag And other issues
CN103199539AInactive Publication Date: 2013-07-10NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Publication Date
2013-07-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the technical field of unified power quality conditioner voltage dip compensation control, and discloses a voltage dip compensation method of unified power quality conditioner with zero input active power. Zero input active power injection voltage dip (swell) compensation is achieved through the method of coordinately controlling output voltage of a cascade current converter of the unified power quality conditioner and output current of a multiple current converter. The compensation control method is simple and feasible, voltage dip (swell) persistent and continuous compensation of a device is achieved, and reliability of device compensation is improved. The problem that the direct voltage is in an undervoltage state or in an overvoltage state brought by active power injection in a compensation process is avoided, a resume or restart process of a compensation rear device is not needed, and stability of the device is improved.
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Description

technical field

[0001] The invention belongs to the technical field of voltage sag (swell) compensation control for a unified power quality regulator, and in particular relates to a voltage sag (swell) compensation method for a unified power quality regulator with zero active power injection. Background technique

[0002] The sensitivity of modern industrial, commercial and residential electrical equipment, such as high-performance office equipment, precision experimental instruments, frequency conversion speed control equipment, programmable logic controllers, various automatic production lines, and computer systems, to changes in power supply characteristics is increasing year by year. ; At the same time, power quality problems are becoming more and more complex, and losses caused by power quality disturbances are increasing day by day. Therefore, in order to improve the quality of power supply, reduce the losses caused to users due to power quality problems, protect the i...

Claims

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