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This paper presents a novel phase change material based thermal energy storage system (PCMTESS) that is suitable for smart building energy management, together with its corresponding thermal-electric combined two-stage dispatching strategy. Benefiting from the phase change materials' thermal characteristic of absorbing or releasing a significant amount of heat at a constant temperature, this thermal energy storage system is endowed with a high capacity and a relatively stable thermal state during its charge/discharge process. To evaluate the thermal performance of the PCMTESS, which is integrated as a part of building wallboard, a detailed analytic thermodynamic building model is proposed that considers the influence of the forced air convection and the external environments, such as solar radiation. Furthermore, a two-stage electric-thermal combined dispatching scheme is designed to minimize the electricity consumption expenditure and power fluctuation on the premise of maintaining a comfortable indoor temperature. Simulation studies on a smart building indicate that the proposed thermal energy storage system is a feasible and economical solution for solving peak load shaving and power fluctuation.Index Terms-thermal energy storage system, phase change material, analytic building model, electric-thermal combined dispatching I. INTRODUCTIONHE growing need for clean energy has stimulated a steady increase in the penetration level of renewable energy resources (RES). However, the intermittency and uncertainty from RES bring the problems of peak load shaving and power fluctuation, which raise great challenges to the power balance and reliable operation of the microgrid (MG) [1][2]. Although electric storage systems can be used to address these problems, their disadvantages are evident and include capacity limitations

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