Core Viewpoint - The commencement of the 500 kV Ouhai substation's 220 kV distribution facility renovation project in Wenzhou marks a significant advancement in the upgrade of the Wenzhou power grid, addressing aging equipment and site settlement issues [1] Group 1: Project Overview - The renovation project is a key initiative for the Wenzhou power grid's "14th Five-Year Plan" and represents the first overall renovation of a 500 kV substation's 220 kV section under local management of ultra-high voltage [1] - The project aims to replace outdoor AIS equipment with indoor GIS equipment, construct new relay protection rooms, and replace concrete structures with hot-dip galvanized steel pipe structures [1] Group 2: Challenges and Solutions - The existing 500 kV Ouhai substation has been in operation for over 20 years, facing issues such as equipment aging and uneven site settlement [1] - The renovation includes comprehensive flood control measures, such as wall renovations, site elevation, and increased capacity for rainwater pump wells to address operational pain points [1] Group 3: Implementation Strategy - To ensure safe and efficient project execution, the company has established a full-chain support system and formed a special renovation team [1] - A customized temporary relocation plan for 16 circuits of 220 kV power supply lines has been developed, utilizing innovative methods such as equipment relocation within the station and external connections to balance renovation and power supply needs [1]