Unipolar current and voltage integrated sensor

Abstract

The invention discloses a unipolar current-voltage integration sensor, relating to an electronic sensor in the field of intelligent power grids. The sensor comprises a current sensor, a voltage measurement sensor, a voltage correction sensor, a signal modulation circuit, an A / D (Analog to Digital) conversion circuit, an FPGA (Field Programmable Gate Array) unit, a wireless transmission extension unit and a high-voltage electricity getting device. A current signal of a power transmission line is collected by the three sensors and the signal is processed. After a voltage value of tested current is calculated, detection information is transmitted through a wireless communication network. The high-voltage electricity getting device can be used for supplying electric energy to online monitoring equipment for a long time by getting energy through a current transformer and cooperatively supplying power with a lithium cell. According to the unipolar current-voltage integration sensor disclosed by the invention, current and voltage information can be transmitted to the computer to be subjected to data processing rapidly, integrally and accurately; high voltage, large current and ferromagnetic resonance cannot be generated; the sensor can be conveniently connected with an electronic instrument and micro-computer measurement and control protection equipment; the system structure is simplified; the space is saved; the energy consumption is very low; and the stability and the accuracy of the whole system are improved.

Description

technical field [0001] The invention relates to electronic sensors in the field of smart grids, in particular to an active unipolar current-voltage integrated sensor. Background technique [0002] The development of modern power system is characterized by large capacity, high voltage, miniaturization, digitization and automation of transmission and distribution systems. With the continuous increase of grid voltage, the volume of traditional transformers is getting larger and larger, the insulation structure is becoming more and more complex, and the difficulty of manufacturing is also increasing. At the same time, problems such as hysteresis, magnetic saturation, secondary non-open circuit, low linearity, and small static and dynamic accuracy ranges in traditional transformers have become increasingly prominent, which can no longer provide guarantee for the development of power systems. Since the output of the traditional transformer is an analog signal, it cannot provide t...

AI Technical Summary

Problems solved by technology

With the continuous increase of grid voltage, the volume of traditional transformers is getting larger and larger, the insulation structure is becoming more and more complex, and the difficulty of manufacturing is also increasing.

At the same time, problems such as hysteresis, magnetic saturation, secondary non-open circuit, low linearity, and small static and dynamic accuracy ranges in traditional transformers have become increasingly prominent, which can no longer provide guarantee for the development of power systems.

Since the output of the traditional transformer is an analog signal, it cannot provide the required digital signal for the automation of the power transmission and distribution system, so it has become a problem that must be solved in the digital substation.

In addition, traditional electromagnetic current and voltage transformers are large in size, complex in structure, easy to saturate the iron core, poor in reliability, low in integration and digitization, and require high insulation performance

A lot of inconvenience, it is difficult to meet the current requirements of smart grid construction based on the Internet of Things

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