High-voltage equipment insulating gas decomposition product detection system and method

Abstract

The invention discloses a high-voltage equipment insulating gas decomposition product detection system and method, and relates to the technical field of insulating gas decomposition product detection.The system comprises a detection flange, a controller, a beam splitter, a beam combiner, a photoacoustic incident optical fiber and a photoacoustic emergent optical fiber; a photoacoustic incidence collimator and a photoacoustic emission collimator are fixed in the detection flange; the controller comprises a photoacoustic laser and a photoelectric detector, and the photoacoustic laser, the beam splitter, the beam combiner and the photoelectric detector are sequentially connected through optical fibers; the beam splitter is connected with the photoacoustic incident collimator through a photoacoustic incident optical fiber, and the photoacoustic emergent collimator is connected with the beam combiner through a photoacoustic emergent optical fiber. The whole detection structure does not need to be equipped with a closed photoacoustic cell, and all photoacoustic signal transmission modes are realized through optical fibers, so that the insulation performance of the high-voltage equipment is not influenced, and the photoacoustic signals are not interfered in the transmission process. The method comprises four steps, and has the same beneficial effects as the system based on the system.

Description

technical field [0001] The invention relates to the technical field of detection of insulation gas decomposition products, in particular to a detection system and method for insulation gas decomposition products of high-voltage equipment. Background technique [0002] The content of sulfur hexafluoride gas decomposition products in sulfur hexafluoride high-voltage equipment indicates the operation status and hidden troubles of high-voltage equipment, which is of great significance to improve the defect diagnosis ability and operation reliability of sulfur hexafluoride electrical equipment. Decomposition products are generated during the latent period of hidden dangers or early faults, which characterize the nature and development degree of faults. The absolute value or proportional relationship of the detection data can effectively represent the relationship between high-voltage equipment fault discharge energy and overheating indicators. The accurate detection of decompositi...

AI Technical Summary

Problems solved by technology

However, due to the broadening effect of these absorption peaks, the entire absorption peak is generally wider, and it is impossible to use tunable semiconductor laser absorption spectroscopy to scan the appropriate absorption peak to complete the measurement, while photoacoustic spectroscopy only needs to measure the absorbed energy, which is more suitable for this occasion. Measure the measured gas

[0004] In the existing method of detecting the concentration of sulfur hexafluoride gas decomposition products inside high-voltage equipment through photoacoustic spectroscopy, a closed photoacoustic cell must be equipped, and an acoustic microphone is used to collect sound vibrations. In the case of the gas cell, online detection cannot be realized

In addition, this detection method uses cables to transmit electrical signals. Since there are tens of thousands to hundreds of thousands of volts inside the high-voltage equipment, the way the cable transmits electrical signals may not only affect the insulation performance of the high-voltage equipment, but also Weak signals are also susceptible to interference during transmission

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