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Solution of fiber Bragg grating online detection system

Solution of fiber Bragg grating online detection system

  • Categories:Solution
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  • Time of issue:2020-08-05
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(Summary description)In recent years, with the expansion of domestic power demand and power grid scale, the level and capacity of power transformer are continuously improved, and the failure rate and repair time of transformer are also increasing.

Solution of fiber Bragg grating online detection system

(Summary description)In recent years, with the expansion of domestic power demand and power grid scale, the level and capacity of power transformer are continuously improved, and the failure rate and repair time of transformer are also increasing.

  • Categories:Solution
  • Author:
  • Origin:
  • Time of issue:2020-08-05
  • Views:0
Information

Project background:

 

In recent years, with the expansion of domestic power demand and power grid scale, the level and capacity of power transformer are continuously improved, and the failure rate and repair time of transformer are also increasing.

As one of the core equipment of power system, power transformer is directly related to the safe and efficient operation of power grid. Once the transformer fails, it will lead to the whole power supply system can not work normally, which will cause immeasurable economic losses, and even threaten the safety of human life and property. Therefore, to carry out the monitoring of transformer operation status can timely discover and early warn the potential fault threat, which is conducive to the operation and dispatching personnel to take effective measures in time to eliminate the abnormal, and avoid equipment damage and more serious accidents.

The internal environment of transformer has the characteristics of high voltage, strong electromagnetic interference, narrow space and strong corrosivity. Stable, accurate and fast detection and accurate fault prediction of transformer have become the key technical problems to be solved and broken through.

 

Program overview:

Based on Fiber Bragg grating sensing technology, fgds-m100 fiber Bragg grating online detection system collects, demodulates and calculates the temperature, vibration, displacement, pressure and other fiber Bragg grating sensors through sensing, analyzing and analyzing three modules; it can obtain the detection value of each FBG sensor node in real time, and has the characteristics of high frequency and high precision.

The fiber Bragg grating analysis module is designed with embedded low-power processor, which can measure 8-channel dynamic signal at 200Hz or 5KHz frequency with high reliability and stability.

 

 

 

 

Advantages of the scheme:

  1. High sensitivity, anti electromagnetic interference. The optical fiber sensing system is hard to be disturbed by the external field, and the optical signal will not interact with electromagnetic wave in the transmission, and will not be affected by any electrical noise.

  2. Optical fiber has good flexibility and toughness, so the sensor can be made into different shapes according to the needs of field detection.

  3. The measurement has wide frequency band and wide dynamic response range.

  4. The system has high integration, low noise and stable operation;

  5. Multi channel real-time acquisition, detection data classification storage according to time and data type, convenient for post-processing.

Scheme Application:

1.transformer winding temperature monitoring

The fiber-optic winding temperature online monitoring system can directly, real-time and accurately measure the winding temperature, realize the internal temperature monitoring of the transformer, accurately measure the temperature of the transformer winding, and control the cooling system such as fan and cooling pump in real time. It can greatly prolong the service life of the transformer of power equipment, ensure the power supply in peak load, and make unexpected or unexpected accidents So as to improve the power production with low cost and improve the safety and reliability of the whole system.

 

 

2.Vibration monitoring of generator stator winding end

By installing the vibration monitoring system of generator stator winding end, the vibration of generator end winding can be monitored online. The system can monitor and analyze the vibration of generator end winding in real time, and provide early warning for purposeful maintenance, so as to prolong the life of generator, avoid unnecessary loss, and find problems timely and effectively Realize the transformation from planned maintenance to condition based maintenance.

 

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