Configuration of Intelligent Terminals in Distribution Network Considering Reliability and Economy

With the continuous advancement of smart grid construction, the coupling degree between distribution information system and physical system is increasing, and the degree of distribution automation will inevitably become higher and higher. This paper establishes a two-layer model for the optimal configuration of intelligent terminals in distribution networks considering reliability and economy: the upper model optimizes the investment cost of intelligent terminals in distribution networks and the system operation cost, and the lower model analyzes the loss of accidental power outages and the cost of operating network losses. A Benders decomposition algorithm based on a multi-cut strategy is proposed to achieve efficient solution, and the effectiveness of the planning method is verified by an IEEE 33-node example. Compared with the scheme without intelligent terminals, the optimized configuration scheme reduces the overall system cost by 37.9%, which is close to the performance of the full "three remote" configuration scheme, and significantly reduces the investment cost by 20.1%. This method provides a practical decision-making framework for distribution system planners to balance reliability improvement and economic constraints.