ARM and DSP based multi-circuit power quality online monitoring device

Abstract

The invention provides an ARM and DSP based multi-circuit power quality online monitoring device. The ARM and DSP based multi-circuit power quality online monitoring device comprises one or more than one measurement module, an ARM module and a power supply module; the measurement module is used for sampling grid signals and performing data computation processing related to the power quality; the ARM module which serves as a control core of the online detection device is connected with the measurement module and used for controlling the data interaction between the measurement module and the ARM module and providing an external communication interface; the power module is used for supplying power for the measurement module and the ARM module; the measurement module comprises three pairs of voltage transformers and current transformers which are used for simultaneously monitoring the three-phase voltage and the three-phase current respectively; output ends of the voltage transformers and the current transformers are connected with an AD (Analog to Digital) conversion module which is connected with a DSP module; the output ends of the voltage transformers are connected with the DSP module through a phase-locked loop; the DSP module is connected with the ARM module. According to the ARM and DSP based multi-circuit power quality online monitoring device, the continuous monitoring and analysis can be performed on a plurality of monitoring points simultaneously and the remote data transmission function is implemented.

Description

technical field [0001] The invention relates to a multi-circuit power quality on-line monitoring device, in particular to a multi-circuit power quality on-line monitoring device based on ARM and DSP. Background technique [0002] One of the highlights of the State Grid Corporation's "Building a Strong Smart Grid" research report is that it highlights that the smart grid must be guided by "information technology", and the important embodiment of "information technology" is "continuous monitoring of power operation", which puts the The real-time, high-precision, and all-round monitoring of the power system has reached an unprecedented height. [0003] With the rapid development of the national economy, the impact and fluctuating loads in the power system are increasing day by day, such as electric arc furnaces, large rolling mills, electric locomotives, etc., which not only generate a large number of high-order harmonics during operation, but also cause voltage fluctuations ,...

AI Technical Summary

Problems solved by technology

Non-linear loads will cause distortion of grid current and voltage waveforms, resulting in serious harmonic pollution of the grid

[0005] These adverse effects on

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