Coordinated Heat And Power Scheduling Of Micro-energy Grid Considering Heat Balance Model Of Building And Indoor Comfort Demand

The traditional coal-fired heating and the energy supply mode of independent dispatching of electricity and heat is inefficient,which is easy to cause air pollution.Under the help of the coordinated scheduling of micro-energy grid,the conversion of electricity-thermal as well as the clean and efficient use of energy can be easier to realize.However,the existing literature on micro-energy grid scheduling greatly simplify the solution model of thermal demand,and considered the thermal comfort of users roughly.In order to solve this problem,this paper proposes a kind of coordinated scheduling method of micro-energy grid,which considers the thermal balance of buildings and the indoor comfort demand.Firstly,a heat balance model is established,which considers the building envelope and indoor air convection,penetration heat consumption of doors and windows,outdoor air intrusion consumption as well as the heat dissipation of the internal heat sourced.Then the relationship between indoor temperature and heating demand is analyzed by physical model.The solution of quantitative relation based on differential equation is presented.Secondly,an industrial park micro-energy grid including air-source heat pump,heat storage equipment and photovoltaic is constructed,and the efficiency model of each equipment is established.Then based on the indoor comfort demand and the renewable energy consumption,a mathematical model of coordinated heat and power dispatch is established,which include the optimal objective of the economic benefit of micro-energy grid and the constraints of comfort demand.A solution method based on genetic algorithm is proposed and the effectiveness of the coordinated scheduling of micro-energy grid is verified by cases.Finally,the basic structure of rural micro-energy grid is constructed,including building-level decentralized electric heating supply system as well as village-level photovoltaic access and cooperative power supply system.On the basis of the heat balance model of building and indoor comfort demand,the flexible indoor comfort constraints is established based on the work-rest rule of staff,in which the situation of people indoor is divided into three states: no one indoor in the daytime,people stay indoor in the daytime,people sleep at night.Then considering the uncertainty of photovoltaic system,the coordinated scheduling model of electricity and heat based on the scenario analysis is established,and an algorithm based solution method is proposed.The applicability of the proposed method in rural areas is verified by examples.