Detection method of carbon tetrafluoride in column type circuit breaker for 1100kV filter

Abstract

The invention discloses a detection method of carbon tetrafluoride in a column type circuit breaker for a 1100kV filter. The detection method comprises the following steps: 1) using gas in the columntype circuit breaker for the 1100kV filter as a to-be-detected sample; injecting the to-be-detected sample into a gas chromatography-quadrupole time-of-flight tandem gas chromatograph-mass spectrometer to obtain the peak area of CF4 of the to-be-detected sample in an ionic chromatogram; 2) comparing the peak area obtained in the step 1) with a standard curve of a CF4 standard product according toa chromatographic analysis external standard method so as to obtain content of the detected CF4 in the column-type circuit breaker for the 1100kV filter. The method is strong in pertinency, high in sensitivity and is suitable for detecting the content of the CF4 in the column-type circuit breaker for the 1100kV filter; moreover, the quantitative lower limit is up to 0.13 micro liter / liter.

Description

technical field [0001] The invention belongs to the technical field of chemical analysis, in particular to a CF 4 content detection method. Background technique [0002] With the development of China's UHV power grid, in order to meet the needs of future UHV power grid construction, 1100kV / 63kA filter column circuit breaker equipment has emerged as the times require. However, the circuit breaker is the key equipment for the operation of the UHV power grid, and its reliability is related to the safety of the entire UHV power grid. Before the equipment is connected to the network, a series of type tests must be carried out on the equipment, among which the insulation type test is an important test for evaluating the insulation performance of the circuit breaker. [0003] The insulation type test is mainly aimed at testing the performance of the main component in the circuit breaker - the arc extinguishing chamber, mainly including frequent opening and closing of the circuit ...

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Problems solved by technology

[0004] Compared with low-voltage equipment, the column circuit breaker for 1100kV filter is larger in volume and longer in conductor, and the distance between the arc extinguishing chamber and the sampling port is increased. Although there are air holes between the ceramic columns, the fluidity is poor. Correspondingly, the SF in the equipment 6 Trace impurity CF 4 Due to the low sensitivity, conventional analytical methods cannot target the ultra-low concentration of CF in column circuit breakers for 1100kV filters. 4 (30ppm) for reliable qualitative and quantitative analysis

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