中低压直流配电电压层级配置方法

随着直流配电系统的发展,中低压直流电压等级的确定,在直流配电典型应用场景中,如何合理地选取电压序列确定直流电压层级,是直流配电发展初期的基础问题。首先,针对中低压直流配电系统提出了电压层级选取方法。该方法根据综合费用最低原则,分析了影响直流配电电压层级的关键因素,并建立了直流配电电压评估模型。然后,通过该模型对每一级电压值的综合费用进行对比,从而选取出完整的电压序列。最后,以负荷密度近似均匀的供电区域为例,验证了所提方法的有效性,为直流配电系统建设提供了参考。

Voltage Hierarchy Configuration Method for Medium- and Low-voltage DC Distribution

With the development of DC distribution system and determination of the medium- and low-voltage DC voltage level, how to reasonably select a voltage sequence and determine the DC voltage hierarchy is the basic issue for the early development of DC distribution. Firstly, a voltage hierarchy method is proposed for medium- and low-voltage DC power distribution systems. The key factors affecting the DC distribution voltage level are analyzed based on the principle of minimizing comprehensive cost and the evaluation model of voltage of DC distribution is established. Then, the comprehensive cost of voltage at each level is compared by the proposed model to select the complete voltage sequence. Finally, a case of a power supply area with uniform load density is taken, which verifies the effectiveness of the proposed method and provides a reference for the establishment of DC power distribution systems.