Multi-timescale Optimal Scheduling of Integrated Energy Systems Based on Wind/Light to Hydrogen

Considering the impact of wind/photovoltaic power output and uncertainty of customer load demand on the integrated energy system, an optimized dispatching model of the integrated energy system based on wind/photovoltaic hydrogen production is established. On the premise of meeting power balance, the multi-stage utilization of hydrogen energy gives full play to the multi-energy complementary characteristics of the integrated energy system, improves system flexibility, maintains its safe and stable operation, and reduces operating costs. The model develops an optimal scheduling strategy by combining multiple energy conversion devices with a multi-timescale optimization method. The model includes a day-ahead optimal dispatching model targeting the lowest daily operating cost; an intra-day rolling optimal dispatching model targeting the lowest energy purchase cost and hydrogen energy loss rate within the day; and a dynamic adjustment model targeting the lowest equipment output power adjustment. The simulation results show that the multi-stage utilization of hydrogen energy is beneficial to improving the system economy and reducing the loss of renewable energy.