Abstract：An AC power differential measurement system was designed based on the Josephson quantum voltage standard.By analyzing the error distribution and error transfer function of the differential sampling system, the sampling switching differential measurement method was proposed, which reduced the gain error of the differential sampling system and improved the accuracy of voltage amplitude measurement.By analyzing the attenuation coefficient η, it was proved that it is easy to realize voltage amplitude measurement of 10-7 magnitude by using switching differential measurement.By evaluating the zero phase of the differential sampling system, the results showed that the differential sampling system has better phase measurement stability.The uncertainty component of the AC power differential measurement system was analyzed, and the power measurement uncertainty of the power factor of 1.0, 0.5L and 0.5C was evaluated. Through the experimental comparison with the AC power national reference instrument, the rationality of the power measurement of the AC power measurement system based on Josephson quantum voltage was proved.
贾正森, 王磊, 徐熙彤, 周天地, 潘仙林, 石照民, 张江涛. 基于约瑟夫森量子电压的交流功率测量系统及方法研究[J]. 计量学报, 2020, 41(4): 469-474.
JIA Zheng-sen, WANG Lei, XU Xi-tong, ZHOU Tian-di, PAN Xian-lin, SHI Zhao-min, ZHANG Jiang-tao. Research on AC Power Measurement System and Method Based on Josephson Quantum Voltage. Acta Metrologica Sinica, 2020, 41(4): 469-474.
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