Intelligent state monitoring system and method for transformer OLTC transmission shaft

Abstract

The invention discloses an intelligent state monitoring system and method for a transformer OLTC transmission shaft. The system comprises a torque, rotation angle and gear shifting period informationacquisition unit of the transformer OLTC transmission shaft, a database and an information processing unit. The database further comprises a rule database, and whether the transformer OLTC transmission shaft breaks down or not is monitored and judged based on a rotation angle signal, a torque signal and a gear shifting period which are directly related to the state of the transformer OLTC transmission shaft, the real state of the OLTC transmission shaft can be monitored more accurately, and reliability is higher. By establishing an association rule base, the state change trend of the OLTC transmission shaft can be pre-judged, potential hidden dangers and faults of a transformer on-load switch can be found in time, early warning is conducted in advance, preventive measures are taken, and the reliability of safe and stable operation of an on-load voltage regulating transformer and an electric power system is improved.

Description

technical field [0001] The invention relates to the technical field of intelligent monitoring of power systems, in particular to an intelligent monitoring system and method for an OLTC drive shaft of a transformer based on rotation angle, torque and shift period. Background technique [0002] The transformer is one of the important equipment in the power system, and its operation stability and reliability are of great significance to ensure the safety of the power system. On-Load Tap Changer (OLTC) is a component used by transformers to adjust voltage. Relying on the adjustment of OLTC, it can basically guarantee the stability of system voltage and provide better services for power users. [0003] With the rapid development of industrial technology, the manufacturing level and complexity are getting higher and higher. Precision manufacturing has put forward higher requirements and unprecedented challenges for power supply quality. It not only requires power companies to prov...

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Problems solved by technology

[0005] At present, although some scholars at home and abroad have carried out fruitful research work on the on-line monitoring technology of on-load tap-changers, most of them analyze or solve a certain problem theoretically or technically, such as an on-load tap-changer disclosed in the prior art. The mechanical performance and on-line monitoring and diagnosis system of the tap changer is a monitoring system based on the rotation angle of the transmission shaft and the vibration, motor current and thermal noise during operation. The vibration and thermal noise are greatly affected by the external environment, and it is difficult to accurately It reflects the real state of the transformer OLTC transmission shaft, and the accuracy, safety and reliability of system monitoring cannot meet the requirements of practical applications.

So far, there are no reports in the literature on online monitoring devices for on-load tap-changers that can be effectively used

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