Dynamic Dispatch of Integrated Wind, Solar and Hydrogen Energy Systems Based on Single Layer Variable Steps

In the context of double carbon, Integrated Wind, Solar and Hydrogen Energy Systems (IWSHES) are attracting a lot of attention because of their good environmental and economic performance. The issue of optimal dispatch is key to the economic and safe operation of integrated energy systems. Model Predictive Control (MPC) has good effectiveness in solving optimal dispatch problems, but there are still problems such as inflexibility and computational inefficiency. In this paper, an IWSHES is studied and a dynamic dispatch model based on MPC rolling optimization of the integrated energy system is developed. And a single layer variable step dispatch method is adopted. The results show that: (1) The Average Deviation Indicator (ADI) can reflect the degree of variation in net load to some extent, and the larger the ADI, the more refined the dispatch time step is required to cope with rapid fluctuations in net electrical load. (2) A dispatching strategy that takes into account the dynamic characteristics of the equipment allows the actual heating power to follow the changes in heat load better and with less power deviation. In the example calculation, the total heat energy deviation is as low as 3.60 kWh. (3) The single layer variable step strategy only changes the number of scheduling nodes in the prediction horizon in each rolling optimization, and the calculation time of the case with single layer variable step is saved by 27.47%, achieving smooth and efficient operation of the system.