Power transformer vibration monitoring system based on wireless sensor network

Abstract

The invention provides a power transformer vibration monitoring system based on a wireless sensor network, which comprises a sensor monitoring device, a data receiving device and a power transformer vibration monitoring center, which are connected sequentially; the sensor monitoring device is used for collecting vibration data at each detection point on the surface of the transformer; the data receiving device is used for receiving vibration data transmitted by the sensor monitoring device and transmitting the vibration data to the power transformer vibration monitoring center. According to the system in the invention, real-time monitoring of vibration of the power transformer is realized.

Description

technical field [0001] The invention relates to the field of transformer monitoring, in particular to a power transformer vibration monitoring system based on a wireless sensor network. Background technique [0002] According to the theoretical analysis of the transformer, when the power transformer is in stable operation, the magnetostriction of the silicon steel sheet causes the core to vibrate, and the winding vibrates under the electric field force of the load current. The vibration of the winding and the iron core is transmitted to the oil tank of the transformer through the surface of the transformer oil tank and the oil, causing the vibration of the oil tank. The vibration of the iron core caused by magnetostriction and the vibration of the winding under the action of the load current are based on twice the frequency of the power supply. Therefore, the two can be distinguished from the vibration caused by the cooling system from the frequency spectrum. The vibration...

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Problems solved by technology

[0003] At present, the transformer vibration off-line monitoring system based on the vibration signal analysis method has been developed, tested and experimentally studied at home and abroad, and the vibration of transformers in operation in multiple substations in many places has been measured, and certain results have been achieved. However, to achieve For the on-line monitoring of transformer vibration, the existing test system has obvious deficiencies. For the relatively mature monitoring system based on wired connection, the signal channel between the sensor signal and the acquisition card mostly uses wired transmission. The length of the cable needs to be dozens or even hundreds of meters, but there are disadvantages such as complex cable layout, high cost, poor maintainability, and poor system flexibility. Faced with these problems, an alternative solution is to use emerging wireless sensor Network monitoring mode to build a wireless, distributed transformer vibration monitoring system, but the wireless sensor network technology is not yet mature, so it is necessary to carry out a feasibility study on the use of wireless sensor equipment to monitor transformer vibration

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