Abstract: With the development of multiple energy system， user-side combined heat and power （CHP） units become more important， which can provide utilization flexibility and reduce energy cost for users. User-side CHP units give energy users the ability to take part in integrated demand response， and theses units are crucial for future power system. According to the operation characteristics of CHP unit， the concept of “cost advantage of CHP” is proposed to describe the operating cost difference between CHP unit and the bundle of traditional electricity generator and boiler. Based on the cost advantage of CHP units， the “Optimization Hotspot Region” is extracted from its operating region. A new integrated demand response model for user-side CHP unit is built using a linear combination of vertex in “Optimization Hotspot Region” to represent its output power and heat. Case study verifies that the proposed model takes less time and iterations in the integrated demand response compared to traditional models.

Key words:  combined heat and power, multiple energy system, operating cost, joint power and heat dispatch, integrated demand response