Intelligent power quality monitoring system

Abstract

The invention belongs to the field of intelligent monitoring devices and particularly relates to an intelligent power quality monitoring system. The intelligent power quality monitoring system comprises a data collecting module, a synchronous sampling analog-to-digital (A / D) conversion module, a data processing module, a storage module, an alarming module, an integrated communication module and a human-machine interface module. The data collecting module, the A / D conversion module, the data processing module and the integrated communication module are sequentially connected. The data processing module is further connected with the storage module and the alarming module and used for collecting power grid parameters, lightning current parameters and power distribution cabinet switch parameters and outputting the power grid parameters, the lightning current parameters and the power distribution cabinet switch parameters to the data processing module through the A / D conversion module. The data processing module delivers processed information to the communication module, and the processed information is output and displayed on the human-machine interface module. The intelligent power quality monitoring system monitors and analyzes the power parameters of a power grid, the lightning parameters and the switch parameters in real time, detects and analyzes the power quality precisely, measures power quality levels of the power grid, is favorable for analyzing and judging reasons causing various power quality problems, and provides a basis for improving the power quality.

Description

technical field [0001] The invention belongs to the field of intelligent monitoring devices, in particular to an intelligent power quality monitoring system. [0002] Background technique [0003] With the wide application and development of power electronics technology, a large number of non-linear loads have been added to the power supply system, such as static converters, which are used in industrial AC-DC conversion devices ranging from low-voltage small-capacity household appliances to high-voltage large melting furnaces. The converter works in a switch mode, which will cause distortion of the voltage and current waveforms of the grid, and cause harmonic pollution of the grid. Impulsive and fluctuating loads such as: electric arc furnaces, large rolling mills, electric locomotives, etc. will not only generate A large number of high-order harmonics, and make voltage fluctuations, flicker, and three-phase unbalance become more and more serious. These adverse effects on t...

AI Technical Summary

Problems solved by technology

At present, the real-time performance of power quality monitoring is not strong, and the monitoring methods are backward, resulting in poor timeliness of data. It is impossible to know the power quality level of each voltage level in various regions in time, and it is impossible to take corresponding measures to improve power quality in time.

[0005] Determining the cause of low power quality requires a large workload and requires a lot of manpower and material resources to collect data. On the other hand, statistical analysis of the collected data is also required

Low efficiency, it often takes a long time from discovering power quality problems to solving them

Insufficient data sharing capabilities and lack of experience exchange among personnel restrict the progress of power quality monitoring

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