Oversampling distribution transformer terminal

Abstract

The invention relates to an oversampling distribution transformer terminal which comprises a main control chip for loading oversampling algorithm software, a calculating chip for collecting three-phase voltage signals and three-phase current signals and a switching signal input circuit for collecting switching position signals of a breaker. The signal input end of the main control chip is connected with the output end of the calculating chip and the output end of the switching signal input circuit, the signal output end of the main control chip is connected with a breaker through a relay, and the signal input end and the signal output end of the main control chip are communicated with a master station through a wireless network module. According to the oversampling distribution transformer terminal, the calculating chip is used for collecting voltage and current signals, thus circuit design is simplified greatly, and reliability and consistency of the circuit are improved. The sampling algorithm software loaded on the main control chip analyzes the power quality data of electrical equipment and transmits the data to the master station, then a user can know the running state of the electrical equipment and timely find out the electrical equipment failure by analyzing the data, thus appropriate measures are taken to improve the utilization rate of the electrical equipment and prevent the electrical equipment and wires from overload-running. The oversampling distribution transformer terminal further has the advantages of prolonging the service life of the equipment and reducing damage to wires.

Description

technical field [0001] The invention relates to the field of low-voltage distribution network monitoring, in particular to an over-sampling distribution transformer terminal. Background technique [0002] When the traditional distribution transformer terminal collects voltage and current signals, it often needs to pass the sampled current and voltage signals through a sample-and-hold circuit, a filter circuit, a proportional amplification circuit, and then undergo AD sampling to convert the analog signal into a digital signal. There are complex sampling circuits, Disadvantages of high price and poor consistency. At the same time, a high-precision time timer is required to collect data with a fixed sampling period. When the frequency of the input signal changes, it is necessary to automatically track the frequency change and adjust the sampling period, otherwise the data spectrum will be leaked and the accuracy will be lost. [0003] Metering chips that have emerged in recen...

AI Technical Summary

Problems solved by technology

At present, there is no distribution transformer terminal that uses metering chips and oversampling algorithms to monitor the power quality of power systems.

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