Discussion on indirect measurement and verification method of calorific value in energy metering of pipeline natural gas

The energy trade transfer of pipeline natural gas is mainly based on volume measurement and increased calorific value measurement. Online chromatograph analysis, offline analysis and assigned component analysis are studied and applied to the quality verification of the composition analysis results. Meanwhile, three innovative methods of sound velocity verification, dynamic data verification and mixed gas heat prediction model are proposed to improve the quality of indirect determination of calorific value.The calorific value is calculated according to the component data, and the analysis of dynamic data proves that the method can effectively monitor the fluctuation of calorific value data and ensure the accuracy and reliability of the data in the energy metering process of pipeline natural gas.