IN-OIL GAS CONCENTRATION MEASURING SYSTEM AND IN-OIL GAS CONCENTRATION MEASURING METHOD USING SAME SYSTEM

摘要

The concentration of in-oil gas is measured with high accuracy without use of normal oil. An in-oil gas concentration measuring system comprises: a gas extracting means which extracts in-oil gas from an insulating oil sample; a component detecting means which detects components of the in-oil gas extracted from the gas extracting means; an extracted-gas concentration calculating means which calculates, on the bases of data detected by the component detecting means, extracted-gas concentrations with respect to the respective gas components thus detected; an extracted-gas concentration storing means which stores therein information on the extracted-gas concentrations that have been, as a result of the in-oil gas extraction performed by the gas extracting means plural times, calculated by the extracted-gas concentration calculating means for the respective times; and an in-oil gas concentration calculating means which calculates in-oil gas concentrations with respect to the respective gas components on the basis of the extracted-gas concentrations thus stored in the extracted-gas concentration storing means. The in-oil gas concentration calculating means calculates an in-oil gas concentration (Q) by using the following equation (1): (In the equation, n denotes 1, 2 and so on, X₀ = 0, Q denotes an in-oil gas concentration, R denotes a rate with which in-oil gas is extracted, and X_n denotes an extracted-gas concentration obtained for the n-th time).