Power transformer loss live-line measurement and hot spot temperature prediction system and method

Abstract

The invention discloses a power transformer loss live-line measurement and hot spot temperature prediction system and method. The system comprises a computer, a digital acquisition card, a temperature sensor, a primary voltage transformer, a secondary voltage transformer, a primary current transformer and a secondary current transformer. The output ends of the primary voltage transformer, the secondary voltage transformer, the primary current transformer and the secondary current transformer are connected with the computer through the digital acquisition card, and the output end of the temperature sensor is connected with the computer; the primary voltage transformer and the secondary voltage transformer are respectively arranged at the primary side and the secondary side of a power transformer; the primary current transformer and the secondary current transformer are respectively arranged at the primary side and the secondary side of the power transformer; and the temperature sensor is used for measuring an ambient temperature of an environment in which the power transformer is disposed and a temperature of an oil top layer of the transformer. The method and system provided by the invention can realize loss live-line measurement of the transformer, can predict the hot-spot temperature of the winding of the transformer, and are used for knowing the state of the transformer and guiding reasonable operation of the transformer.

Description

technical field [0001] The invention belongs to the technical field of power systems, and specifically discloses a system and method for live measurement of power transformer loss and hot spot temperature prediction. Background technique [0002] The oil-immersed power transformer is one of the core equipment in the power system, and its stable operation has a very important impact on the safety and reliability of the system and the control of operating costs. The value of transformer copper loss and iron loss is related to the manufacturing process, operation mode and power supply quality of the transformer. On the one hand, the transformer loss characteristics reflect whether the operation of the transformer is economical and reasonable, and on the other hand, it also provides diagnostic basis for fault analysis. [0003] While the voltage level and single capacity of power transformers continue to increase, the heat dissipation problem of the transformer is becoming more...

AI Technical Summary

Problems solved by technology

If the temperature of the power transformer winding is too low, the load capacity of the transformer will not be fully utilized, reducing the economic benefits; when the temperature is too high, it will easily accelerate the aging of the insulation and reduce the life of the transformer

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