Research And Application Of Online Oil Filtering Transformer

Firstly, the research and development status of domestic and foreign oil filtering technology is reviewed, explained the significance of online transformer oil filtering and practical value, and further put forward the design idea and technology programs Transformer oil filtering device.In this paper, in-depth study of the properties of transformer oil, transformer oil pollution reasons, composition and feature extraction. A detailed description of the method of vacuum decontamination composition, precipitation, centrifugation, etc., and the advantages and disadvantages of various techniques described in comparison.It also features a gas extraction-gas chromatography, extraction of water feature quantity-infrared spectroscopy, flow collection-throttle flow meter method, the collection of temperature-thermal resistance characteristics of the volume of the extraction method and data acquisition, temperature control-heat exchange and flow control-frequency method, conducted in-depth research.When energized transformer oil filtering, since the oil flow electrification, when the flow rate is too large may cause damage to the insulation, thereby endangering the safe operation of the transformer, so the need for transformer oil flow rate monitor and control the flow rate to achieve through the tuner and PID motor with change voltage and frequency to achieve control of the oil flow rate, the flow rate can be adjusted smoothly, and the adjustment range, fast response.When the transformer oil temperature is too high, resulting in shortened life of insulating oil, insulating oil and filtered back into the transformer when the temperature is too high will cause the system to alarm. When the transformer oil temperature is too low, resulting in transformer oil filter is not ideal. So the need for transformer oil is heated, and the temperature is controlled within a certain range, and the heat treatment after the insulating oil filter, so the need for temperature acquisition, to achieve general use PT100 temperature acquisition. Temperature regulation generally used inverter, inverter control through a plate-type and flow rate of the media converter can be realized on the temperature control, and herein detailed comparison of the various principles and advantages and disadvantages of the heat exchanger.Finally, the paper describes the overall structure and performance-based automatic control of flow and temperature of the transformer oil filter line, and the actual field application and verification. Test data show that online transformer oil purification effect is good, full compliance with the requirements of the relevant regulations. During the operationof all protection devices were online oil filter, oil filter line proved safe and reliable, has practical application value.