Dispatching Strategy For Energy Microgrid In Smart Buildings Based On Tiered Temperature Response

In recent years,there has been sustained growth of China's photovoltaic industry.However,the fluctuation of photovoltaic output hinders photovoltaic consumption.Energy microgrid can integrate a variety of distributed renewable sources to achieve multi-energy complementary and integrated scheduling,which provides possibilities to promote photovoltaic consumption.The integrated demand response also improves flexibility of energy microgrid scheduling and operation economy.At present,few literatures have conducted theoretical researches deeply on tiered temperature response in energy microgrid for smart buildings.Therefore,the dispatching strategy of energy microgrid for smart buildings based on tiered temperature response in this paper has important theoretical and practical significance.Firstly,the influence of tiered temperature response of smart buildings on the dispatching strategy of energy microgrid is analyzed.Energy microgrid can promote the consumption of distributed renewable energy to realize the complementarity and comprehensive optimization of multi-energy flow.Tiered temperature response can not only enable smart buildings to respond effectively to the integrated demand of energy microgrid,but also provide users with more diversified modes of energy use.Furthermore,it can decrease the users' energy consumption cost,improve the flexibility of the energy microgrid dispatching,and assist the power grid in peak shaving and valley filling.Secondly,the thermal model of the smart buildings and the model of tiered temperature response are established in this paper.Indoor temperature is analyzed according to the principle of heat transfer and conduction in buildings.Therefore,a linear model which indicates the dependence of indoor temperature on total heat demand and outdoor temperature is established.The scope of temperature response is divided into five intervals,and the maximum response times and the maximum time of tiered temperature response are modelled.Finally,the model of tiered temperature response is established.Furthermore,a deterministic dispatching model of energy microgrid based on tiered temperature response of smart buildings is established based on the forecasted photovoltaic output,electricity demand and outdoor temperature,aiming at minimizing the energy microgrid's operating cost for 24 hours.Considering the volatility of photovoltaic output,electricity demand and outdoor temperature,a stochastic optimization model of energy microgrid dispatching is established.Finally,a simulation example is given to illustrate the proposed dispatching strategy of energy microgrid for smart buildings based on tiered temperature response.It is proved that the introduction of tiered temperature response can effectively reduce the operation and dispatching cost of energy microgrid for smart buildings and help peak shaving of the power grid.