Sensitivity-based control for HUB substation considering multiple distribution networks

This paper aims to develop sensitivity control strategies for energy storage systems specifically designed to operate in conjunction with renewable-oriented transformers across various distribution networks. As demand for mobile transformers increases due to site constraints, the deployment of storage-equipped facilities is on the rise. These units necessitate centralized control strategies that account for load fluctuations across integrated distribution networks. While studies on electric vehicle charging considering the variability of renewable energy or load are prevalent, optimizing storage management for individual substations requires further attention, particularly considering the status of distributed sources at lower levels. We propose a sensitivity control approach for storage situated at the terminus of transmission systems, taking into consideration distribution line losses and constraints imposed by renewable energy sources. By establishing control priorities for each source and conducting optimization, we determine the suitable sensitivity for distribution network management. Validation is performed based on current analysis results using PSCAD. This paper aims to elevate the role of the distribution system operator through a storage-equipped substation. By adapting the operational range of design scenarios, diverse distribution systems can be tested against various configurations of connected devices, thereby enhancing overall system resilience and efficiency.