Smart grid to promote current sensor technology upgrade

With the continuous progress of science and technology, the types of sensors are growing. At the same time, China's urban electricity consumption has increased significantly, the power supply equipment is often overloaded pre-loaded state, for the detection of current sensors came into being.

With the development and development of new energy technologies, current sensors in the wind power industry is particularly important, it is the wind turbine converter essential components.

A very large number of small or PCB current sensors are required in the converter, which belongs to a closed-loop control system to ensure that the inverter can respond quickly. The simultaneous action of the inverter and the generator ensures that after the wind turbine has been started it provides continuous power to the grid over a wide range of wind speeds until the turbine is shut down at the upper wind speed limit.

In order for the drive to work at its best, the current in operation needs to be measured without interruption. The performance of the current sensor directly affects the quality of the circuit control and the response time, 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.

The new fiber optic current sensor is the product of the rapid development of science and technology of the smart grid. China has launched the XDGDL-1 fiber optic current sensing system, which realizes the full digital closed-loop control of the pipeline current sensing system, has the characteristics of good stability and linearity, high sensitivity, etc., and meets the requirements of high-precision measurement in a large range.

At the same time, the system develops a field-windable telescopic structure, which is easy to install, avoids the interference of stray magnetic fields, and the measurement error of busbar eccentricity is less than plus or minus 0.1%. It realizes a high-precision signal conversion scheme, which provides high-precision analog signals and a standard digital communication interface for the rectifier control equipment.

Current sensors are also beneficial in reducing cable loading, enabling the monitoring of power output from substations and reducing outage times caused by local grid failures. Current sensors can monitor the current in power supply cables, and if the cable outlets are overloaded, these current sensors can transfer a portion of the load to other phases, or to newly laid cables, to protect the safe use and operation of the cables.