The increase in urban electricity consumption has made power supply equipment often overloaded and pre-installed, and power equipment is facing more and more tests. 60% of electronic equipment failures come from power supplies. With the increasingly serious severity of power supply problems, power supply technology has gradually been valued by the majority of manufacturers. Power supply technology with sensor detection, sensor sampling, and sensor protection has gradually become a trend. Equipment for protecting power supplies has also been born, detecting current or voltage. The sensor came into being. The current sensor refers to a sensor that can sense the measured current and convert it into a usable output signal, which is widely used at home and abroad.
Closed loop current sensor continuously monitors power
With the development and development of new energy technologies, the application of current sensors in the wind power industry is particularly important. It is an indispensable component of converters in wind turbines.
In the converter, a lot of small or PCB current sensors need to be installed. It belongs to a closed-loop control system to ensure that the inverter can respond quickly. The simultaneous action of the inverter and the generator can ensure that the power grid provides continuous power to the grid in a wide wind speed range after the wind turbine is started, until the turbine is stopped at the upper limit wind speed.
In order to enable the driver to achieve the best working state, it is necessary to continuously measure the current in operation. The performance of the current sensor directly affects the quality and response time of the circuit control, which is why it can be widely used in the wind power industry. . At the same time, the closed-loop current sensor not only has high bandwidth and fast response time, it also has the advantages of good linearity and high accuracy.
Current sensor reduces cable load
In the UK, a current sensor suitable for installation on the main line of a 240-600 amp substation was born. This sensor monitors the power output of the substation and can reduce the power outage time caused by local power grid faults. The current sensor can monitor the current of the power supply cable. If the cable is overloaded, these current sensors can transfer part of the load to other phases or the newly laid cable to protect the safe use and operation of the cable.
With the continuous development and upgrading of smart grids, current sensors have also been continuously improved and improved in terms of technology, design and utility, which have a major role in current measurement in metallurgy, chemical and other industries.
Optical fiber current sensor based on smart grid
The new optical fiber current sensor is the technological product of the rapid development of smart grid. China has launched the XDGDL-1 optical fiber current sensing system, which realizes the fully digital closed-loop control of the pipeline current sensing system. It has the characteristics of good stability and linearity, and high sensitivity.
At the same time, the system has developed a telescopic structure that can be wound on site. It is easy to install and can avoid the interference of stray magnetic fields. The measurement error of the bus eccentricity is less than plus or minus 0.1%. The control equipment provides high-precision analog signals and standard digital communication interfaces.
Industrial upgrade development promotes current sensor improvement
Driven by China's industrial development and upgrading, the safe use of electrical equipment has received increasing attention. As a tool with both protective and monitoring functions, the current sensor will play a more important role in the future power grid. Compared with similar foreign products, there is still a big gap in the domestic current sensor technology that needs to be made up and improved.
There are also many new industries emerging in China that need the support of sensors. Whether for safety or market benefit considerations, current sensors will tend to be more efficient and reliable. Under the requirements of low-carbon environmental protection, miniaturization is also the future A major trend, which will also promote domestic sensor manufacturers to invest more experience in developing new technologies and products. In the near future, current sensors will be widely used in more industries, and at the same time will lay a solid foundation for the emerging Internet of Things.
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