影响间接接入式直流电能表计量准确性的相关研究
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摘要
间接接入式直流电能表是直流充电、轨道交通等领域进行贸易结算不可或缺的器具,其通常搭配直流分流器进行直流电能计量。对该类型表的单独检定与整体检定试验进行了分析,提出了应将直流小信号输入阻抗纳入该类型表的型式评价考核项目的建议,以最大限度地降低测量线路引入的误差,确保直流电能计量的准确性。
The indirect connected DC watt hour meter is an indispensable instrument for trade settlement in the fields ofDC charging and rail transit. It is usually equipped with DC shunt for DC power metering. This paper analyzes the sepa-rate and integral calibration tests of this type of meter,and puts forward the suggestion that the input impedance of DCsmall signal should be included in the pattern evaluation items of this type of meter,so as to minimize the error introducedby the measurement circuit and ensure the accuracy of DC electric energy measurement.
The indirect connected DC watt hour meter is an indispensable instrument for trade settlement in the fields ofDC charging and rail transit. It is usually equipped with DC shunt for DC power metering. This paper analyzes the sepa-rate and integral calibration tests of this type of meter,and puts forward the suggestion that the input impedance of DCsmall signal should be included in the pattern evaluation items of this type of meter,so as to minimize the error introducedby the measurement circuit and ensure the accuracy of DC electric energy measurement.
引文
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[2]王红洁,周航,马烨,等.直流电能表的应用与量值传递体系研究[J].科技与创新2017(2):87-88.
[3]隋争.直接接入式直流电能表校验装置的难点探讨[J].科技与创新,2015,(24):132-134.
[4]曹骞,李庆先,何献华.电子式直流电能表测量结果的不确定度分析[J].仪器仪表标准化与计量,2017,(3):34-36.Cao Qian,Li Qingxian,He Xianhua.Uncertainty Analysis of Measurement Results of Electronic DC Watt-hour Meters[J].Instrument Standardization and Measurement,2017,(3):34-36.
[5]JJG 842-2017,电子式直流电能表[S].
[6]Wang Zhi,Yang Maotao,Yang Jing.Research and Construction of DCEnergy Measurement Traceability Technology[J].IOP Conference Series:Earth and Environmental Science,2018,113(1).
[7]Shuai Han,Bo Zeng.Research on a Portable Detection Device of DC E-lectric Energy in Electrical Vehicle Charging Station[J].Advanced Materials Research,2014,392-396.
[8]王利阁.电动汽车充电桩直流电能表检定装置研究[D].湖南大学,2016.
[9]张有顺,冯井岗,等.电能计量基础..北京:中国计量出版社,2002:262-264.
[10]曾博,李刚,韩帅,等.电动汽车充电桩直流电能表检定系统[J].中国计量.2014,42(7):80-82.