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Playback device and method for recording power qualities

A technology of power quality and working method, applied in the direction of measuring devices, frequency measuring devices, measuring electrical variables, etc., can solve problems such as continuous oscillation of system frequency, deterioration of power quality, sudden large load changes, etc., to achieve flexible analysis and avoid errors , Ease of use

Active Publication Date: 2014-12-03
国网山东省电力公司营销服务中心(计量中心) +2
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AI Technical Summary

Problems solved by technology

The application of this type of equipment is likely to cause a sudden change in the load. Generally, the time for the maximum load to appear is very short, but the peak value may be several times or dozens of times the average load.
When the change amplitude is relatively large relative to the system capacity, it is likely to cause continuous oscillation of the system frequency and voltage swing, which not only makes the various pollutions of the power system increasingly serious, and the power quality is also deteriorating, but also because this type of equipment has serious power Complex characteristics such as impact, three-phase balance, harmonics, inter-harmonics, voltage and current drastic changes, so that the electric energy meter designed based on the power theory of sinusoidal circuit or traditional non-sinusoidal circuit cannot truly reflect the electric energy used by users. , which directly affects the accuracy of energy metering

Method used

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  • Playback device and method for recording power qualities
  • Playback device and method for recording power qualities
  • Playback device and method for recording power qualities

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Experimental program
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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] Such as figure 1 As shown, a power quality recording and playback device includes an acquisition device 1, a parameter configuration unit 2, a data reading and processing unit 3, a storage initialization unit 4, a file storage unit 5, an emergency mechanism unit 6, and a power quality playback unit 11 and power amplifier source 12; the acquisition device 1 is connected with the parameter configuration unit 2, the parameter configuration unit 2 is connected with the data reading and processing unit 3, the storage initialization unit 4 is connected with the file storage unit 5, and the data reading and processing unit 3 is connected with the emergency mechanism unit 6; the data reading and processing unit 3 is connected with the file storage unit 5 by means of a buffer mechanism, such as figure 2 As shown, the space of memory 10 is divided into s...

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Abstract

The invention discloses a playback device for recording power qualities. The device comprises an acquisition unit, a parameter configuration unit, a data reading and processing unit, a storage initialization unit, a file storage unit, an emergency mechanism unit, a power quality playback unit and a power amplifier source. The invention further provides a method for measuring and recording power qualities and includes parameter acquisition, parameter configuration, data reading and processing, file storage, emergency processing and power quality playback. The playback device and the method for recording power qualities are based on a virtual equipment technology and do not depend on standard meters to measure electric energy values, the power qualities can be analyzed flexibly, the device is convenient to carry, appearance of site conditions in laborites is facilitated, and a standardized measuring method is provided for measurement of electric energy meters. Simultaneously, standard meter errors can be avoided, high-speed sampling can be performed, impact performance waveforms are recorded and analyzed, the power qualities are flexibly analyzed, and the usage is convenient.

Description

technical field [0001] The invention relates to a new power quality recording and playback device and method. Background technique [0002] In recent years, with the rapid development of modern science and technology, high-voltage, large-capacity impact equipment such as electric arc furnaces, pulverizers, rolling mills, electric traction machines, fast charging equipment for electric vehicles, and electrified railways have been widely used. The application of this type of equipment is likely to cause a sudden change in the load. Generally, the time for the maximum load to appear is very short, but the peak value may be several times or dozens of times the average load. When the change amplitude is relatively large relative to the system capacity, it is likely to cause continuous oscillation of the system frequency and voltage swing, which not only makes the various pollutions of the power system increasingly serious, and the power quality is also deteriorating, but also bec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00G01R19/02G01R21/06G01R23/02
Inventor 徐鼎郭宝利郭红霞代燕杰李琮琮
Owner 国网山东省电力公司营销服务中心(计量中心)
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