With the wide application of integrated energy systems (IES)

the degree of coupling between different types of energy sources is further strengthened

and the mechanism of fault development tends to be complicated. Therefore

in order to improve the accuracy and practicability of the reliability assessment of IESs

a sequential simulation reliability assessment method considering multi-energy flow and thermal inertia is proposed in this paper. In this method

the IES structure model is constructed with the combined cooling

heating and power (CCHP) unit as the core equipment

combining with the new energy source to realize the comprehensive energy power flow calculation considering any loss. Then

a load reduction optimization model is established

considering the importance of load and operational economy

in the system status analysis. Furthermore

the heat supply reliability index is corrected taking into account the transmission delay characteristics and terminal thermal inertia. A case study based on the 20-node and the analysis of the influence factors demonstrates the validity of the proposed method.