High voltage direct current transmission energy measurement is not assessed, and direct current distribution networks require energy measurement. Sensors cannot be directly used in high-voltage direct current transmission systems for direct current distribution networks. It is necessary to carry out theoretical and technical research on sensors for the application scenarios of medium and low voltage direct current distribution networks. In this paper, in the DCS1 dual port DC distribution network simulation system, simulation analysis is conducted on the dual port DC distribution network system based on the metering operation mode set by the metering system. By analyzing the transient waveform of voltage and current in the metering operation mode of the metering system, the cycle and rate of change of the voltage and current waveform are obtained. The maximum measurement frequency of the voltage sensor is \(f > 1/1.{\text{2ms}} \approx {\text{833Hz}}\) , and the maximum measurement frequency of the current sensor is \(f > 1/1.9{\text{ms}} \approx {\text{526Hz}}\) . The simulation results have important guiding significance for the selection of DC distribution network sensors.