Hunan Electric Power ›› 2022, Vol. 42 ›› Issue (1): 38-42.doi: 10.3969/j.issn.1008-0198.2022.01.007

• Researches and Tests • Previous Articles     Next Articles

Design of Low Current Standard Power Source for High-Precision Gateway Watt-Hour Meter Verification

YANG Jing, ZENG Weijie, WANG Zhi, SHEN Liman, SU Yuping   

  1. State Grid Hunan Electric Power Company Limited Power Supply Service Center (Measuring Center), Changsha 410004, China
  • Received:2021-11-05 Revised:2021-12-07 Published:2025-08-05

Abstract: In order to solve the problem that the accuracy of 0.3 A low current output is low in the verification of high precision gateway watt-hour meter, a low current output scheme based on trans-resistance negative feedback is proposed, and the feedback measurement module and noise filtering unit are designed, a low current standard power source is developed. The experimental results show that the designed small current standard power source is stable and reliable, and the problem of verification and tracing of small current points in 0.3 A and above gateway meter is solved.

Key words: gateway electric energy meter, verification, standard source, low current

CLC Number: