Verification methodology for gas quality tracking systems

Gas streams in gas networks are diversifying. This diversification brings new challenges in the field of fiscal metering. It could require an update of the fiscal metering system, in order to keep complying with measurement requirements. In this case a gas quality tracking (GQT) system can be a cost-efficient solution, compared to expensive alternatives like placement of gas chromatographs. As part of the fiscal metering process, the accuracy of a GQT system has to be verified periodically to assure that accuracy requirements will be durably met. In this article a verification method for GQT systems for the purpose of near real time fiscal metering in regional gas grids with multiple entries is presented.