Power quality monitoring terminal for switch-in electronic mutual inductor

Abstract

The invention relates to a power quality monitoring terminal for a switch-in electronic mutual inductor. The power quality monitoring terminal has the technical characteristics that a fiber transceiver and a CPU are included and connected; the fiber transceiver is connected with the electronic mutual inductor in a process level through optical fibers and used for receiving real-time sampling data output by the electronic mutual inductor and sending the sampling data to the CPU; and the CPU performs electrical energy analysis and calculation to the received real-time sampling data, and uploads the power quality data obtained through the calculation to a station control level through a network interface. The power quality monitoring terminal has a reasonable design, realizes the function that a plurality of outgoing lines can be monitored simultaneously through one monitoring terminal, reduces the equipment cost, effectively avoids the influence of electromagnetic interference, is greatly improved on stability, reliability, safety and other aspects, meets the accuracy required by the power quality monitoring and analyzing, and meets the requirement for power quality monitoring of an intelligent power network.

Description

technical field [0001] The invention belongs to the field of smart grids, in particular to a power quality monitoring terminal connected to an electronic transformer. Background technique [0002] The smart grid and the traditional grid have undergone great changes in the way of analog quantity acquisition. The analog signal input by the cable from the traditional voltage and current transformer is transformed into the digital signal of the electronic transformer input by the communication cable or optical fiber. Traditional grid substations, such as figure 2 As shown, the 100V / 5A analog signal is transmitted to each acquisition device (including protection and power quality monitoring) by the electromagnetic voltage and current transformer through the cable. Each acquisition device needs to be equipped with a voltage and current transformer to transform the analog signal It is a small signal that the embedded device can receive, and it is converted into a digital signal th...

AI Technical Summary

Problems solved by technology

Due to the relatively large volume of electromagnetic voltage and current transformers, a single device cannot monitor multiple outgoing lines at the same time, and each analog signal needs to be equipped with a high-precision AD conversion, which is costly

Therefore, the power quality monitoring terminal using the traditional power grid cannot meet the needs of the smart grid

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