天然气流量次级标准装置计量性能核查技术

Verification Technology for Metrological Performance of Secondary Standard Devices for Natural Gas Flow

彭利果 何金蓬 周刚 万元周

PENGLiguo HEJinpeng ZHOUGang WANYuanzhou

国家石油天然气大流量计量站成都分站, 四川 成都 610213 中国石油西南油气田公司天然气研究院, 四川 成都 610213 国家市场监管重点实验室(天然气质量控制和能量计量), 四川 成都 610213 中国石油天然气质量控制与能量计量重点实验室, 四川 成都 610213 中国石油西南油气田公司工程技术研究院, 四川 成都 610213

Natural Gas Chengdu Branch of China National Station of Petroleum Flow Measurement, Chengdu, Sichuan 610213, China Research Institute of Natural Gas Technology, Southwest Oil & Gasfield Company, PetroChina, Chengdu, Sichuan 610213, China Key Laboratory of Natural Gas Quality Control and Energy Measurement for State Market Regulation, Chengdu, Sichuan 610213, China Key Laboratory of Natural Gas Quality Control & Energy Measurement, Southwest Oil & Gasfield Company, PetroChina, Chengdu, Sichuan 610213, China Research Institute of Engineering Technology, Southwest Oil & Gasfield Company, PetroChina, Chengdu, Sichuan 610213, China

针对用于贸易交接流量计流量量值溯源的高精度流量标准装置计量性能实时核查技术不完善问题，开展了天然气流量次级标准装置计量影响因素、实时核查技术指标与方法研究，研究中采用了k-means聚类等大数据统计分析技术，创新提出天然气流量次级标准装置计量性能实时核查技术指标与核查方法。验证表明，采用组合涡轮工作标准表，组合实施一对一核查、多对一核查、多对多核查、总量核查，监控天然气发热量波动率、压力温度稳定系数、喷嘴间温差、喷嘴差压及涡轮工作标准表相对次级标准体积流量偏差及重复性共6项技术指标，能准确实时核查用于检定高准确度检流量计的次级标准装置的计量性能，实时监控流量计检定的过程质量、保证每台次流量计检定结果准确可靠。研究成果对于天然气流量标准装置质量控制具有一定的指导意义。

In response to the issue of incomplete real-time verification technology for the measurement performance of the high-precision flow standard device used for tracing the flow value of custody transfer flow meter, a study is conducted on the influencing factors of natural gas flow secondary standard device measurement, real-time verification technical indicators and methods. Large data statistical analysis technology is used in the study, and innovative real-time verification technical indicators and verification methods for the measurement performance of natural gas flow secondary standard device are proposed. We use a combined turbine working standard, and implement a combination of one-on-one verification, many-to-one verification, many-to-many verification, and total amount verification to monitor six technical indicators, including natural gas heat generation fluctuation rate, pressure and temperature weight coefficient, temperature difference between nozzles, nozzle differential pressure, and secondary standard volume flow deviation and repeatability of the turbine working standard. And we make an accurate and real-time verification of the metrological performance of the secondary standard device used for calibrating high-precision flow meters, monitor the process quality of flow meter calibration, and ensure the accuracy and reliability of each flow meter calibration result. The research results have certain guiding significance for the quality control of natural gas flow standard devices.

10.11885/j.issn.1674-5086.2022.01.24.08