On-line monitoring system for dissolved gas in transformer oil based on embedded platform
A technology of dissolved gas in oil and transformer oil, which is applied in the field of transformers, can solve the problems of lack of self-learning ability of chromatographic peaks, reduce the accuracy of gas concentration, misjudgment and missed judgment of chromatographic peaks, etc., and achieve easy software update and easy function expansion , the effect of low cost
A technology of dissolved gas in oil and transformer oil, which is applied in the field of transformers, can solve the problems of lack of self-learning ability of chromatographic peaks, reduce the accuracy of gas concentration, misjudgment and missed judgment of chromatographic peaks, etc., and achieve easy software update and easy function expansion , the effect of low cost
CN109977916AActive Publication Date: 2019-07-05EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID +2
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[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0036] Such as figure 1 As shown, an on-line monitoring system and method for dissolved gas in transformer oil based on an embedded platform includes the following steps:
[0037] 1) An online monitoring system for dissolved gas in transformer oil based on an embedded platform. The main structure includes a data acquisition module, a curve sequence data processing module, a chromatographic peak identification module, a fault diagnosis module, a Webserver service module, a communication module, etc.
[0038]2) Download the generated Vxworks image file to the hardware circuit board, pre-enter the basic information of the transformer, communication parameters, IP address and other information into the database, and collect the dissolved gas signal in the oil through the A / D acquisition card.
[0039] 3) Further, real-time or offline col...
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The invention relates to an on-line monitoring system for a dissolved gas in transformer oil based on an embedded platform. Aiming at the problems that an existing transformer online monitoring deviceis easily influenced by the phenomena, such as that the chromatographic base line jitter, the chromatographic base line shifts, the chromatographic base line has the abnormal points, the interferenceis large, the waveform is irregular, etc., in the chromatographic peak recognition, so that the misjudgment and the missed judgment of the chromatographic peak are caused and the existing device is lack of self-adaption and self-learning capabilities for misjudgment and the missed judgment of the chromatographic peak, and accordingly the measurement distortion of the gas component data is caused,and the accuracy of the fault diagnosis is further influenced. Under an embedded Vxworks operating system, the on-line monitoring system of the present invention adopts a differential threshold filtering method, a rough penalty method, the first-order and second-order derivatives, a PSO-SVM (particle swarm optimization support vector machine) and other algorithms to carry out the interference peak identification and the gas component classification on a series of chromatographic peaks in chromatographic curve sequence data after oil-gas separation, and calculates the gas concentration value.According to the system, the accuracy and stability of the chromatographic analysis are greatly enhanced, and the performance of an online monitoring device for the dissolved gas in the transformer oil is improved.
Description
technical field [0001] The invention relates to the technical field of transformers, in particular to an online monitoring system for dissolved gas in transformer oil involved in power grids, power plants and specific industrial users. Background technique [0002] The transformer is the core equipment in the power system. In addition to insulating and cooling the insulating oil in the transformer body, the concentration and combination ratio of the dissolved gas in the oil can also reflect in real time whether there are defects, faults and insulation status inside the transformer. Wait. Therefore, oil chromatography has become an effective means for real-time monitoring of transformers. Transformer online monitoring systems have been widely used in fields such as power plants, coal, steel mills, and petrochemical industries from the beginning of intelligent substations to the present. [0003] With the increase of the power grid capacity and the service life of the transfo...
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Patent Timeline
05 Jul 2019
Publication
CN109977916A
- IPC
- G06K9/00; G06K9/62
- CPC
- G06F2218/10; G06F2218/04; G06F2218/12; G06F18/2411; G06F18/214
- Inventors
- 廖建平; 宗起振