Optimal Capacity Configuration of Electric-Heat-Cold-Gas-Hydrogen Multi-Energy System Considering Fast Load Tracking

The foundation for ensuring the low-carbon transition and effective operation of the system is the structural optimization and rational allocation of the integrated energy system. It’s important to consider the system’s load-tracking capability in addition to maintaining the required supply and demand balance. This work uses a load tracking capability index based on the dynamic characteristics of strong inertia and high delay in heating and cooling equipment, as opposed to the single economic purpose of traditional capacity configuration. In order to assess and improve the tracking performance of the system, the rise time and maximum overshoot of the device output are selected as the dynamic performance evaluation parameters. The attenuation rate is fixed to obtain the product of the two parameters, which reflects the device’s ability to track loads. An electric-heat-cold-gas-hydrogen multi-energy grid-connected system is created to simulate and validate the model, and the objective function carefully takes into account the lowest annual economic cost of the system and the optimal system load tracking capability. The findings demonstrate that the capacity configuration, following the addition of new index, significantly affects the system’s tracking performance. The larger the weight, the faster and more stable the system will operate, but it will also increase the economic cost.