Design of DC Power Standard Source Based on PJVS

To meet the growing demand for high-precision DC power measurement and calibration, a quantum-based DC power standard based on ‘standard source’ architecture is introduced in this paper. This system integrates a dual-channel PJVS, high-voltage amplifier, large-current transconductance amplifier, voltage/current ratio self-calibration device, and other essential components. The standard power signal output by the system is directly used as a calibration reference for DC power measurement devices, and the combined uncertainty is expected to reach 3×10
⁻⁶
(k=1) at an output level of 1000V/120A.