Three-phase unbalanced governance device with on-site vibration alarm function and realization method thereof

Abstract

The invention provides a three-phase unbalanced governance device with an on-site vibration alarm function and a realization method thereof. A data acquisition unit is used to acquire the current characteristic data of a power grid. A voltage dip knowledge base forming unit extracts data with the same characteristic type with the characteristic data from historical data, classifies the extracted data to form a sample set according to a preset class attribute, and further screens out data which meet a predetermined condition from the sample set to form a voltage dip strong association rule knowledge base. According to the current characteristic data of the power grid, a recognition unit determines the current voltage dip reason of the power grid in the voltage dip strong association rule knowledge base. A governance unit determines a power grid power quality governance compensation scheme according to the current voltage dip reason, and compensates the user side voltage according to the power grid power quality governance compensation scheme. According to the invention, the dependence on waveform is avoided; and based on the analysis of the historical data, a strong association rule in historical voltage dip is excavated to realize the prediction and governance of the possibility of future voltage dip.

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 with an on-site vibration alarm function and an implementation method thereof. 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, asymmet...

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Problems solved by technology

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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