Transducer for measuring tiny water in oil and method for on-line real-time monitoring of temperature and humidity in oil

Abstract

The invention relates to a transducer for measuring tiny water in oil and a method for on-line real-time monitoring of temperature and humidity in oil. The transducer for measuring the tiny water in the oil comprises a capacitive humidity sensitive element, a capacitance measuring circuit, a resistive temperature sensitive element, a resistance measuring circuit, an MCU control unit and a power supply module. The capacitance measuring circuit is used for generating capacitance measuring signals according to the capacitance values of the capacitive humidity sensitive element. The resistance measuring circuit is used for generating resistance measuring signals according to the resistance values of the resistive temperature sensitive element. The MCU control unit calculates humidity values according to the capacitance measuring signals output by the capacitance measuring circuit, calculates temperature values according to the resistance measuring signals output by the resistance measuring circuit and generates humidity information output signals and temperature information output signals so that the humidity information output signals and the temperature information output signals can be output through an output circuit. The power supply module is used for providing a power supply for the transducer for measuring the tiny water in the oil. The transducer for measuring the tiny water in the oil has the advantages that hardware cost is low, the measuring accuracy is high, and the stability is high.

Description

technical field [0001] The invention relates to power equipment, more specifically, to a measuring transmitter for micro-water in oil used for monitoring power transformers and a method for real-time on-line monitoring of temperature and humidity in oil. Background technique [0002] Transformer oil is an important insulating medium inside the power transformer. It mainly plays the role of insulation, cooling and arc suppression in the power transformer. The quality of the oil directly affects the electrical performance of the transformer. Therefore, the transformer oil must have a certain electrical insulation strength during operation. Although the micro-water content in transformer oil is very small, it has a great influence on the insulation performance of the oil. Moisture can not only reduce the breakdown voltage of the insulation system and increase the dielectric loss, but also directly participate in the chemical degradation reaction of polymer materials such as oi...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a micro-water measurement transmitter in oil that uses discrete sensing elements to measure temperature and humidity, and to use Method for real-time online monitoring of temperature and humidity in oil by the micro-water in oil measuring transmitter

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