Research on Coordinated Power Supply Mode of Multi-voltage Level Distribution Network Considering Reliability

Abstract

In order to address that current coordinated power supply research of distribution networks only considers single voltage level, coordinated power supply modes for multi-voltage distribution networks considering 110kV lines are established, and optimized based on economic performance and load supply capability. Firstly, based on the connection modes of distribution lines, interconnecting structure of substations and allocation of transformers, the typical power supply modes for medium-voltage distribution networks are constructed, and the mode attributes are calculated. Then, based on economic analysis and load supply capability, the optimal match mode and mode parameters for network/substation on different voltage levels are selected with the objective of minimizing load supply cost. Finally, 110kV distribution networks are introduced, and the power supply relations between 110kV lines and 110kV transformers are studied, and the optimal coordinated power supply mode for multi-voltage distribution networks considering 110kV lines is obtained, which can provide guidance for the coordination and planning of regional distribution networks.