Transformer on-load switch fault diagnosis platform based on live-line test

Abstract

The invention discloses a transformer on-load switch fault diagnosis platform based on live-line test, and relates to the technical field of power detection equipment. The platform comprises a coil, asignal processing device, a photoelectric conversion device, an energy taking device, a D / A conversion device, a controller and a communication device, wherein the coil, the signal processing device,the photoelectric conversion device, the D / A conversion device and the controller are connected in sequence and are in one-way communication, the controller is connected with the communication deviceand is in two-way communication, the energy taking device is connected with the signal processing device and is in one-way communication, and the energy taking device is connected with the photoelectric conversion device and is in one-way communication. Effective real-time monitoring and reliable and accurate fault diagnosis and early warning are realized through the coil, the signal processing device, the photoelectric conversion device, the energy taking device, the D / A conversion device, the controller, the communication device and the like.

Description

technical field [0001] The invention relates to the technical field of power detection equipment, in particular to a transformer on-load switch fault diagnosis platform based on live testing. Background technique [0002] As the main equipment in the substation, the transformer plays an important role in the power grid, and the on-load tap changer plays an important role in connecting the power grid, regulating active and reactive power flows and stabilizing the center voltage of the load in the power system. more and more extensive applications. The on-load tap changer is the only movable part in the on-load tap changing transformer, and it is also one of the key parts. The manufacturing quality, operation and maintenance technical level of the on-load tap-changer are directly related to the safe operation of the on-load tap changer. [0003] In the actual operation process, there are many failures of on-load tap-changers, and the causes of the failures are complicated. ...

AI Technical Summary

Problems solved by technology

On-site testing has high safety risks, high labor intensity, messy on-site wiring, and difficult data analysis, which requires a lot of manpower and material resources, and cannot detect mechanical and electrical failures of the on-load tap-changer in time, making it difficult to meet the requirements of refined maintenance

[0007] 2. The on-load switch test needs to be wired on each side of the main transformer, which has high safety risks and high labor intensity

[0008] On-site on-load switch test requires two personnel to operate the instrument, one personnel to operate the on-load switch, and at least two personnel to climb up the main transformer and perform wiring on each side of the main transformer. High risk, high labor intensity, messy on-site wiring, requiring a lot of manpower and material resources

[0009] 3. There are many types of on-load switch faults, and minor faults cannot be found in time

[0010] There are two main manufacturers of on-load switches with more than ten models. Internal faults are divided into mechanical faults and electrical faults, and the internal structure is complex. A slight loosening of screws can develop into a major accident. However, traditional on-load switch maintenance only depends on There are two methods of daily power failure test (period of 6 years) and action frequency lifting inspection (every 5000 times of lifting inspection), and small fault defects cannot be found in time, and can only be found after the period is reached or the main transformer fault trips.

[0011] 4. The voltage of the on-load switch power failure test is low, and it is difficult to process and analyze the test data

The existing monitoring technology cannot effectively monitor the dynamic process current of the on-load tap changer in real time, and perform reliable and accurate fault diagnosis and early warning

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