Voltage Level Study for DC Distribution Grid Based on Comprehensive Evaluation

With the development of DC converter technology and the increase in demand for DC power distribution applications, DC power distribution systems have received widespread attention. The formulation of voltage level sequence in DC power distribution is of great significance to the development of DC power distribution. According to the recommended values given in the Chinese national standard “Guideline for standard voltages of medium and low voltage DC distribution system,” two groups of low-voltage distribution voltage level schemes are initially selected: 110V, 220V, 400V, and 600V, 750V, and 1OOOV. two groups of schemes are comprehensively evaluated separately by using the combination of the analytic hierarchy process and the method of good and bad solution distance, and 400V is finally recommended as the optimal scheme for civil scenarios. The 750V is the optimal solution for the professional field.