A regional integrated energy system planning model incorporating power distribution, gas, and heat networks aims to simultaneously optimize the cost of the entire system. The overall planning process is as follows:

Step 1: Collect load data (e.g., electricity, cooling, heating) for the area to be planned, assess the endowment of renewable energy sources (e.g., wind, solar), and understand the basic construction status of power distribution and gas networks.

Step 2: Divide the area to be planned into sub-regions according to land use types. Considering both functional benefits and spatial constraints, select construction sites for energy hubs within each sub-region.

Step 3: Based on the selected energy hub sites, examine the engineering realities of the area to be planned, and plan the layout form and laying routes of the district heating network.

Step 4: Determine the types and basic parameters of candidate equipment and energy transmission pipelines in the system, and construct an initial physical architecture for energy hubs partitioned by equipment type.

Step 5: Establish a regional integrated energy system planning model that integrates power distribution, gas, and heat networks. Input the electricity, cooling, and heating load data of each sub-region, as well as candidate equipment parameters and pipeline network parameters, into the model for solving.

Step 6: Derive the equipment models and connection relationships of each energy hub, the expansion capacity of power distribution and gas networks, and the new construction capacity of the district heating network based on the calculation results.