Combined Heat and Power Dispatching Strategy Considering Heat Storage Characteristics of Heating Network and Thermal Inertia in Heating Area

In traditional combined heat and power dispatching, demand for real-time balance of electric and heat load limits peak shaving capacity of generating unit during peak period of heat load, resulting in frequent occurrence of wind power cuitailment. In view of this, actual physical model of combined heat and power system is analyzed in this paper. By using heat storage and release characteristics of heating network and thermal inertia of heating area, an improved combined heat and power dispatching strategy is proposed to promote wind power consumption with minimum coal consumption as objective function. Considering conventional system constraints and heat system model, traditional heat load real-time balance constraint is replaced by maintaining indoor temperature within expected range, and increasing heat dissipation of radiator as an optimization control variable. A day-ahead dispatching strategy is carried out. Simulation result shows that the improved dispatching strategy considering heat storage characteristics of heating network and thermal inertia in heating area can improve economical performance of the system and accommodation ability of otherwise curtailed wind power. © 2018, Power System Technology Press. All right reserved.