Transformer monitoring system and monitoring method

Abstract

The invention discloses a transformer monitoring system and a monitoring method. The transformer monitoring system comprises a transformer operating condition detection device and a monitoring device, and is characterized in that the monitoring device comprises a microprocessor, a data memory and a communication module, the transformer operating condition detection device comprises a temperature detection module, a current sensor, a voltage sensor, a oil level sensor and a noise sensor, and the temperature detection module comprises a first temperature sensor, a second temperature sensor and a third temperature sensor. The monitoring method comprises the steps of firstly, detecting operating conditions of a transformer in real time, and uploading the detection information synchronously; secondly, storing operating condition information of the transformer; and thirdly, analyzing and processing the operating state information of the transformer, and outputting a fault diagnosis result. According to the invention, the temperature, current, voltage, oil level and noise of the transformer can be monitored timely and accurately, thereby ensuring efficient and safe running of the transformer, and reducing failures.

Description

technical field [0001] The invention belongs to the technical field of transformer monitoring, and in particular relates to a transformer monitoring system and a monitoring method. Background technique [0002] Transformer is a device that uses the principle of electromagnetic induction to change AC voltage. The main components are primary coil, secondary coil and iron core. Transformer is a device that converts AC voltage, alternating current and impedance. When there is AC current in the primary coil , the AC magnetic flux is generated in the iron core, and the voltage (or current) is induced in the secondary coil. With the sustained, healthy and rapid development of China's economy, the demand for electricity continues to grow rapidly, which promotes the development of China's transformer manufacturing industry, but there are still some faults in the process of transformer use. Power system cost, cost-effective. At present, the transformer mainly has the following probl...

AI Technical Summary

Problems solved by technology

At present, the transformer mainly has the following problems: First, the damage of the transformer is mostly due to the high temperature of the components in the transformer, which causes the reduction of the withstand voltage capacity and mechanical strength of the insulating material, and the inside of the transformer is prone to overheating, including the primary coil or the winding in the secondary coil. , iron core overheating and oil temperature overheating, etc.; secondly, when some components in the transformer are loose or ferromagnetic resonance occurs in the transformer, vibration will occur in the transformer and noises of varying degrees will appear; in addition, there is an oil leakage fault in the transformer, and the oil in the transformer Generally, the position is within the specified range. When the transformer oil leaks, the oil level in the transformer will be low, causing the bushing in the transformer to be exposed to the air, and the decomposition switch will be exposed to the air, and the insulation level will be reduced, which will easily cause breakdown discharge and cause accidents; finally , In the rated voltage and rated current of the transformer, when the working current or working voltage of the transformer exceeds the rated value, it will also cause damage to the transformer.

However, the transformer is mainly monitored manually, which is interfered by human factors, the detection is inaccurate, and the working status of the transformer cannot be obtained in time to reduce faults

Nowadays, the detection modules used in the transformer monitoring system are independent of each other, and information fusion and comprehensive judgment cannot be realized. Therefore, a transformer monitoring system and monitoring method are studied, which integrate transformer temperature, current, voltage, oil level and noise monitoring. The efficient and safe operation of transformers and the reduction of faults are of great significance to power systems

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