Substation Expansion & Brownfield Upgrade Market Research Report –Segmentation by Upgrade Type (Capacity Expansion (Transformer Addition / Uprating), Voltage Level Upgrade, Substation Automation & Digitalization Retrofit, Protection & Control System Upgrade, Switchgear Replacement & Modernization, Others); by Substation Type (Air-Insulated Substations (AIS), Gas-Insulated Substations (GIS), Hybrid Substations, Mobile / Modular Substations, HVDC Converter Stations, Others); by Voltage Level (Medium Voltage (Up to 36 kV), High Voltage (36 kV – 220 kV), Extra High Voltage (220 kV – 765 kV), Ultra High Voltage (Above 765 kV), Others); by Component Scope (Power Transformers, Switchgear (Circuit Breakers & Disconnectors), Protection & Control Systems, Substation Automation Systems (SAS), Busbars & Conductors, Others); by Utility Type (Transmission Utilities, Distribution Utilities, Integrated Utilities, Renewable Energy Developers / Grid Operators, Industrial & Commercial Captive Substations, Others) ; and Region - Size, Share, Growth Analysis | Forecast (2026– 2030)