How is the application of flexible transformer?

Transformers are an indispensable part of the power system. Its core function is to measure current or voltage and provide accurate primary current and voltage measurements for secondary maintenance and control equipment. Measurement accuracy, transient characteristics, stability and anti-interference performance are important indicators for measuring the quality of transformers. With the increase in voltage levels and the continuous increase in transmission capacity of power systems, the defects of traditional current transformers such as difficult insulation, easy saturation, poor transient performance and large size have gradually become prominent.

In order to suppress the various shortcomings of traditional transformers and ensure the stable operation of the power grid, after years of technical research, flexible transformers have been successfully developed. The core equipment of this transformer adopts an all-optical structure, which can accurately transmit DC components, fundamental components and higher harmonics. One coil can measure currents of hundreds of thousands of amperes, and the instantaneous error of transient current is reduced to less than 10%, which is an effective improvement. It has high harmonic control accuracy and strong anti-electromagnetic interference ability, and is suitable for different industries such as large thermal power, nuclear power, gas, hydropower, etc. It is also suitable for rapid investigation and positioning of open cable faults in large cities.

In order to limit the small space of the device, the volume and overweight of the transformer, the sensor ring is made into an optical cable by utilizing the soft and flexible characteristics of the sensor optical fiber, which can be installed on wires of all shapes. The weight of the surrounding area is reduced by more than 90%, with the advantages of sensitive equipment, cumbersome maintenance, and strong compliance. At the same time, the sensor optical fiber ring cannot cut off the original primary circuit in the station during installation, and can temporarily or permanently increase the measurement points in the system, so that the device stops running when the substation is running without causing power outages on the measured line. It is particularly suitable for substation transformation, power plants and other applications.

It is understood that the flexible transformer has been recognized by the industry as a promising new type of current transformer. After years of hard work, a complete product line of photoelectric current transformers has been formed, covering various voltage levels from 66kV to 800kV, covering column type, GIS type, bushing type, flexible type, etc., and many devices have been stably operated in smart substations.