CT passive source of electricity (electromagnetic induction energy harvesting)

Background:

Nowadays, China has made great progress in terms of life, economy and science and technology, among which the electric power industry is the most obvious. The domestic electric power industry has now set a benchmark in the international industry.Under the strategic goals of "power Internet of Things" and "digital grid", comprehensive monitoring of the status of the power grid has become an important step in realizing the digitalization and intelligence of the power grid. In this process, the application scenarios of power detection and monitoring equipment have become increasingly complex, the scale has gradually increased, and the demand for safe and stable power supply has also continued to increase. However, current transmission line monitoring equipment mainly supplies energy through wiring power supply or solar + energy storage power supply. It faces severe challenges such as high cost, frequent manual maintenance, and poor reliability, which seriously restricts the promotion, application and development of online transmission line monitoring equipment. .

In order to solve the problem of power supply for power detection and monitoring equipment, we will take you to learn about one of the safer energy supply solutions for equipment in the current power industry - passive source of electromagnetic induction energy!

When it comes to passive source of power, I believe the first thing that pops up in everyone’s mind must be the wireless charging function used on smartphones! In principle, the understanding is correct, but compared with the technology of passive source of electricity, the fields of application are essentially different. The former is currently suitable for medium, high and low voltage transmission lines. Passive source power is referred to as CT power extration, which mainly consists of three components: magnet core, power module and electrical equipment.

CT power extraction is based on the principle of electromagnetic induction, which induces energy from power lines in a non-electrical connection. The magnetic core material is processed into the required shape (usually a ring shape) through a special process, and the AC wire is passed through the inner hole of the magnetic core material. The magnetic core will sense the magnetic field around the wire and pass through the magnetic ring coil. Electric energy is induced, and after the electric energy is converted into AC/DC power through the coil end, a DC regulated power supply is output. (The magnetic core can be processed into a closed-loop or open-close structure according to requirements)

Features:

1. Stable power supply - The CT power supply device can be externally attached to the wire to provide stable power output, and can realize self-protection under short circuit and surge current, and achieve long-term stable operation with low heat consumption. It is a safe and reliable power supply method.

2. Wide application - The magnetic core of the CT power taking device can be specially customized according to different working environments. It has excellent waterproof, moisture-proof, high temperature resistance and other characteristics, and can be stable even in complex and severe weather such as rain and snow. , effective power supply.

3. Compact size - CT power extraction device has high power density, small size and light weight, which can greatly reduce the air resistance on overhead lines and reduce the load-bearing capacity of the line.

Application Environment:

1. Suitable for conventional medium voltage or low voltage transmission lines

2. Suitable for underground mines or tunnels

3. Overhead cables, underground branch cables, branch boxes, etc.

4. Rail transit electric traction system

Product related companies:

CT power extraction is a necessity derived from the development of the power industry. Currently, the quality of products produced by domestic manufacturers is uneven. Among them, Hefei Hemei Electronics Technology Co., Ltd., a leading material manufacturer, is an example: Hemei Electronics is a A leading domestic designer and manufacturer specializing in the research and development of electromagnetic signal coupling and magnetoelectric power conversion technology, it has been committed to promoting the progress and development of magnetoelectric signal coupling measurement technology, passive self-power supply technology, and mid-range wireless power transmission technology.

Hemei Electronics mainly produces passive self-powered (CT power supply) devices and CT power supply modules. Ultra-high-precision AC measurement sensors, permalloy cores, magnetic shielding boxes, etc.

The products are mainly used in passive power supply of intelligent sensing equipment, passive power supply AC measurement of AC power supply systems such as power and railways and monitoring equipment, amplification and isolation of carrier communication signals in smart home systems, etc.