Wireless transmission system for power network signal based on acquisition type current transformer

Abstract

The invention relates to a wireless transmission system for a power network signal based on an acquisition type current transformer. The wireless transmission system comprises a current and voltage interface, a power network signal sampling circuit, a power network signal processing circuit, a CPU, a wireless communication module, a power network phase sequence setting circuit and a power supply circuit, wherein the output end of the current and voltage interface is connected to the input end of the power network signal sampling circuit and the input end of the power supply circuit; the outputend of the power network signal sampling circuit is connected to the input end of the power network signal processing circuit; the output end of the power network signal processing circuit is connected to the input end of the CPU; the output end of the CPU is connected to the input end of the wireless communication module; the output end of the power network phase sequence setting circuit is connected to the input end of the CPU; the output end of the power supply circuit is connected to the input ends of the power network signal processing circuit, the CPU and the wireless communication module. A voltage signal and a current signal are precisely sampled, metered and wirelessly transmitted to a power distribution cabinet, so that integral production cost and labor cost are greatly reduced; in addition, the sampling circuit is good in flexibility and can realize real-time transmission.

Description

technical field [0001] The invention relates to a power grid signal transmission system, in particular to a power grid signal wireless transmission system based on an acquisition type current transformer. Background technique [0002] The existing current transformer is an instrument that converts the large current on the primary side into a small current on the secondary side for measurement. The current transformer itself does not have the acquisition function, and it needs a matching acquisition device to sample and calculate the current and voltage signals. At present, the supporting acquisition devices basically use the form of a bus for connection and communication, so the supporting acquisition devices require a large number of connecting wires and will consume a lot of labor. Moreover, the connection form of the acquisition device for collecting circuit signals is single, and the current and voltage signals of each phase of the circuit cannot be monitored separately ...

AI Technical Summary

Problems solved by technology

[0002] The existing current transformer is an instrument that converts the large current on the primary side into a small current on the secondary side for measurement. The current transformer itself does not have the acquisition function, and it needs a matching acquisition device to sample and calculate the current and voltage signals. At present, the supporting acquisition devices basically use the form of bus for connection and communication, so the supporting acquisition devices require a large number of connecting wires and will consume a lot of labor.

Moreover, the connection form of the acquisition device for collecting circuit signals is single, and the current and voltage signals of each phase of the circuit cannot be monitored separately according to the needs of users, resulting in poor flexibility of circuit functions

Images