Urban Zero-Carbon Grids via Building Flexibility and Regional Power Sharing

⚡ AI Executive Summary

Researchers examining Hong Kong and Guangdong have modeled how building-level demand flexibility combined with cross-regional power coordination can enable dense urban areas to transition toward fully decarbonized electricity systems. The study explores the technical and economic feasibility of leveraging flexible building loads—such as HVAC and water heating—alongside inter-regional renewable energy trade to reduce reliance on fossil fuel peaking capacity. For urban utilities operating in climate-constrained regions, this work suggests that zero-carbon targets need not depend solely on massive local renewable deployment or oversized storage. Instead, orchestrating building demand response as a virtual generation resource—coordinated with neighboring grids that have stronger renewable potential—can lower system costs while improving renewable utilization. The implication is that urban decarbonization strategy must integrate grid operation, building controls, and regional transmission planning as a single optimization problem rather than treating them independently.