Current sensor and implementing method thereof based on alloy resistor

Abstract

The invention discloses a current sensor based on an alloy resistor and an implementing method thereof. The current sensor comprises the alloy resistor, a voltage measuring unit, a power supply unit, a controller and a communication unit, wherein the alloy resistor is serially connected with a to-be-measured circuit, the voltage measuring unit is used for measuring the voltage at the two ends of the alloy resistor and sending the voltage value to the controller, the controller is used for calculating the current value of the measured circuit and outputting according to the resistance value of the alloy resistor, the power supply unit is used for supplying power for the voltage measuring unit, the controller and the communication unit, and the communication unit is used for the remote outputting of the controller. When the controller sends measured data to a far end or a background, the measured data is transmitted through the communication unit. Compared with an existing current transformer, the current sensor has the advantages that the temperature drift is avoided, the mechanical vibration-resistant performance is realized, the frequency characteristic is good, the alternating current and the direct current are universal, the size is small, the assembly is realized, and the like.

Description

technical field [0001] The invention belongs to the field of automatic information collection and control of electric power systems, and in particular relates to a method for realizing a current sensor based on an alloy resistance. Background technique [0002] At present, smart grid has become a major research topic in the development and transformation of global energy. The basic idea of ​​smart grid is to use advanced digital information network to connect power generation, power transmission, power transformation, power distribution and power service, as well as energy storage and various electrical equipment and other energy-consuming facilities of energy end users. Control realizes the management of electric energy, and achieves the goal of improving resource utilization efficiency and improving power supply quality and reliability through precise energy supply, corresponding energy supply, mutual energy supply and complementary energy supply. [0003] Sensor and meas...

AI Technical Summary

Problems solved by technology

However, its essence has not changed fundamentally, the principle of electromagnetic or optical conversion is complicated, the linearization is not ideal and unstable, the gap between the primary and secondary systems remains the same, and the frequency response, dynamic characteristics, and electrical characteristics such as AC and DC are still difficult to understand through the electromagnetic field. Aspects such as the reliability and versatility of current measurements of switching or optical switching pose a potential threat

Images