Three-phase imbalance treatment device and realization method thereof
A balanced, three-phase technology, applied in the direction of circuit devices, multi-phase network asymmetry reduction, multi-phase network elimination/reduction of asymmetry, etc., can solve the power grid three-phase imbalance, error, unable to record large data volume waveforms, etc. problems, to achieve the effect of avoiding dependence
Inactive Publication Date: 2017-05-10
浙江百固电气科技股份有限公司
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In the traditional technology, the research on the cause analysis of power quality is mainly based on the experiment and simulation of the three-phase unbalance of the power grid, but the traditional technology based on the experiment and simulation has shortcomings. The complex and simplified model cannot completely simulate the real system, resulting in errors; 2. The detection equipment in the power grid can only detect the sag amplitude and duration of the voltage sag, and cannot record the waveform of a large amount of data, which leads to power quality events Deviations in the analysis of the causes
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[0063] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0064] Such as figure 1 As shown, it is a three-phase unbalance control device provided by an embodiment of the present invention, and the device includes:
[0065] The data acquisition unit 110 is used to acquire the current characteristic data of the power grid, and the characteristic type of the characteristic data includes the three-phase sag amplitude of the voltage sag, the three-phase duration of the voltage sag, and the time when the voltage sag occurs;
[0066] The voltage sag knowledge base forming unit 120 is configured to extract data having the same feature type as the feature data from historical data, and classify the extracted data to form a sample set according to preset category attributes, and further Screening out data satisfying predetermined...
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The invention provides a three-phase imbalance treatment device. A data acquisition unit is used for obtaining current feature data of a power grid; a voltage sag knowledge base forming unit is used for extracting data having the same feature type with the feature data from historical data, carrying out classification on the extracted data according to preset category attributes to form a sample set, and furthermore, screening out data meeting preset conditions from the sample set to form a voltage sag strong-correlation rule knowledge base; an identification unit is used for determining a current voltage sag reason of the power grid in the voltage sag strong-correlation rule knowledge base according to the current feature data of the power grid; and a treatment unit is used for determining a power grid power quality treatment compensation scheme according to the current voltage sag reason, and carrying out compensation on user-side voltage through the power grid power quality treatment compensation scheme. The three-phase imbalance treatment device and the realization method thereof prevent dependence on waveform, mine strong association rules in historical voltage sags based on analysis of historical data and realize prediction of possibility of the future voltage sag and treatment of the voltage sag.
Description
technical field [0001] The invention relates to the technical field of power quality three-phase unbalance control, in particular to a three-phase unbalance control device and an implementation method. Background technique [0002] With the development of science and technology and industry, many industrial users with a high degree of automation have higher and higher requirements for power quality. In production or information technology enterprises, since most devices and single-chip-based digital controllers or power electronic devices are very sensitive to various electromagnetic interferences, very slight disturbances in the power grid will cause the above products to fail to work or some functions to decline , making the enterprise suffer huge losses. [0003] At present, the ideal power signal has a three-phase sinusoidal waveform with fixed frequency and amplitude. However, in real life, due to circuit faults, asymmetry of lines and equipment, and startup of large l...
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IPC IPC(8): H02J3/26
CPCH02J3/26H02J2203/20Y02E40/50
Inventor 黄颖博
Owner 浙江百固电气科技股份有限公司