When partial discharge occurs in SF

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gas insulated equipment

SF

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gas will decompose to a series of trace gas. Real-time detection of the decomposed gas is of great significance for timely detection of insulation defects of the equipment and maintenance of the safe operation of the power grid. In this paper

for the photoacoustic spectroscopy online detection technology of SF

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decomposition gas

the technical difficulty and key technologies such as cross interference and calibration of SF

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decomposition gas are studied and discussed. The scientific selection method of SF

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decomposition gas filter is proposed in this paper

and seven characteristic gases of SF

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decomposition gas and their corresponding infrared absorption peak parameters of the filter are determined by a large number of experiments. Meanwhile

a multi-component gas calibration method is used to eliminate the cross-interference influence of the gas components in the detection. The research in this paper provides a reference idea for solving the key problems of the photoacoustic spectroscopy

online detection technology of SF

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decomposition gas.