A Reliability-based DG Planning Method against Ice Storm Weather

The ice storm, characterized by freezing rain, would cause great damages to power system transmission lines and towers, which significantly affects the normal power supply. Distributed generation (DG) installation is considered as an efficient way to improve the power system resilience against natural hazards. However, current studies have hardly focused on the reliability-based DG planning considering the extreme weathers. To address the problem, this paper establishes a complete scheme for DG planning under a specific ice storm weather example. After consecutive three steps of ice storm modelling, reliability evaluation and optimization, an optimal DG allocation plan is obtained to reduce the ice-storm-related economic loss as much as possible. Case study on IEEE 33 bus system shows that the DG plan by the proposed method will help system operator reduce nearly 2.8 million yuan’s loss a year, which shows great practicability and advantage in future analysis and decision of distribution system planning.