Low-carbon economic optimal dispatch strategy of integrated energy system considering electric-heat flexible load and carbon trading

In order to improve the consumption of renewable energy, stabilize load fluctuations and control total carbon emissions, this paper proposes a low-carbon economic optimal dispatch strategy of integrated energy system (IES) considering electric-heat flexible load and carbon trading. Combined with the curtailable, shiftable and transferable characteristics of flexible load on the demand side, the strategy establishes an optimal dispatch model under the ladder-type carbon trading mechanism, which comprehensively considers the operation cost, flexible load dispatch cost and carbon trading cost. The analysis of the case study proves that the participation and interaction of flexible electric and thermal loads can significantly improve the consumption rate of renewable energy, realize load peak shaving and valley filling, and relieve peak power supply pressure.