Risk dispatching of electricity-heat integrated energy system considering unimodal distribution

The uncertain renewable energy integrated into the electricity-heat integrated energy system will lead to the operation risk of system，while balancing the risk controllability and dispatching economy through quantifying risk reasonably is the key of risk dispatching of electricity-heat integrated energy system. The moment ambiguity set can be constructed by the unimodal distribution characteristic of stochastic wind power to describe the uncertainty of wind power. Meanwhile，the distributionally robust chance constraint method is adopted to describe the operation risk of system. Furthermore，the distributionally robust risk dispatching model of the electricity-heat integrated energy system is built. On this basis，from the perspective of risk occurrence probability and economic cost，the quantitative indices of mean risk probability and risk dispatching cost using for assessing the operation risk caused by the uncertain wind power are proposed. Finally，the modified Barry Island electricity-heat integrated energy system is taken as an example to carry on the case study analysis，which verifies the feasibility and effectiveness of the proposed model and the risk assessment indices. Moreover，the optimal dispatching strategy of the electricity-heat integrated energy system is given. © 2023 Electric Power Automation Equipment Press. All rights reserved.