Fiber temperature measuring structure used for 10kV distribution transformer

Abstract

The invention discloses a fiber temperature measuring structure used for a 10kV distribution transformer. The fiber temperature measuring structure is reasonable in structure and convenient to operate and can effectively and accurately detect the hot-spot temperature of a winding inside the transformer. The fiber temperature measuring structure comprises a high-low voltage winding, and further comprises a sensor oil duct stay installed on the high-low voltage winding, a fiber temperature sensor for detecting the temperature of a coil in the high-low voltage winding, a fiber junction box connected with the fiber temperature sensor through a fiber, a lead wire clamp for fixing the fiber and a clamping piece for fixedly installing the lead wire clamp. According to the scheme provided by the invention, the high-low voltage winding in the transformer is provided with the fiber temperature sensor for detecting the hot-spot temperature, and during work, a temperature value is detected through the fiber temperature sensor and is retransmitted to the fiber junction box by use of the fiber, so that the temperature of the high-low voltage winding can be monitored in real time, and it can be ensured that the transformer is at a highly efficient running state.

Description

technical field [0001] The invention relates to the technical field of distribution transformers, in particular to an optical fiber temperature measuring structure used in 10KV distribution transformers. Background technique [0002] Generally, the types of transformer faults mainly include thermal faults and electrical faults, among which thermal faults account for about 60% of the total number of faults, and overheating and high-energy discharge faults account for about 10%. The service life of an oil-immersed transformer mainly depends on the service life of the insulating material, and the decisive factor that promotes the aging of the insulating material is the temperature. Therefore, the hot spot temperature of the transformer determines the service life of the transformer. [0003] In the past, due to the internal insulation requirements of the transformer and the strong internal electromagnetic interference, the temperature of the hot spot could not be monitored. Fo...

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Problems solved by technology

For this reason, in the past, the method of installing a current transformer at the lower part of the bushing and returning an analog signal to measure the hot spot temperature of the transformer winding has a large error.

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