Grid-Forming 5MW Medium-Voltage Energy Storage PCS Step-Up Integrated Machine

This technical proposal details a Grid-Forming 5MW Medium-Voltage Energy Storage PCS Step-Up Integrated Machine, designed to address the urgent need for grid-forming support in modern power systems with high renewable energy penetration. The document covers the background of grid-forming technology, relevant policies, and standards, emphasizing the value of grid-forming energy storage. It presents an overall design scheme for a 35kV integrated machine, including main technical parameters, equipment layout, and civil engineering requirements. The proposal delves into the grid-forming PCS, highlighting its electrical topology, technical parameters, advantages, core functions, and design features. It also describes the pad-mounted transformer, high-voltage switchgear room, communication and power cabinet, and auxiliary isolation transformer cabinet. Finally, it provides typical grid-forming energy storage schemes, including unit configuration and scheme comparison, to demonstrate practical applications and benefits for enhancing grid stability and supporting high shares of renewable energy integration.