Aim to achieve source-load balance for large cities where the power grid experiences significant load surges, coordinated scheduling is often employed. However, the uncertainty of load variations greatly impacts the effectiveness of such scheduling methods. In response to this situation, a method for achieving source-load balance in areas with significant load surges in large city power grids is proposed. Based on the load characteristics of these areas, a real-time scheduling framework for source-load balance is established, and the framework uses the division between the day-ahead time scale and the intra-day time scale as a reference point. Control strategies for source-load balance are developed within this framework, and a source-load balance scheduling model is established for solving, aiming to derive the optimal solution as the best balancing approach. Case study analysis results demonstrate that the proposed source-load balance method has a good load scheduling effect, ensuring a high level of energy utilization efficiency and exhibiting good overall adaptability.