Dual-layer flexibility dispatching of distributed integrated energy systems incorporating resilient heating schemes based on the standardized thermal resistance method

Abstract

Deep exploration and effective coordination of customer-side electrical and thermal loads significantly promote renewable energy consumption. This paper proposes a distributed integrated energy system (DIES) by coupling a power distribution grid, heat supply network, wind power, photovoltaic, and combined heat and power generation. Based on the standardized thermal resistance method, the dynamic thermal power flow model of the heating network and the overall power flow model of the DIES are constructed. On this basis, the flexible heating load under the user-following resilient heating scheme is obtained by considering users' behavior and physical comfort. Based on the resilient heating scheme, a dual-layer dispatching model of the DIES is constructed, and a multi-scenario day-ahead dispatching is conducted to maximize renewable energy consumption. Compard with traditional heating schemes, the dispatch results show savings in heating demand of 7.8 % and 6.2 % with the basic resilient heating scheme and ultimate resilient heating scheme, respectively, and an increase in regional PV power consumption of 27.5 % and 35.8 %, respectively. Overall, improving heating schemes in DIES can bring comprehensive benefits to the energy saving and enhance the flexibility of system dispatching.