The Heating System Of Residential Area Based On The Use Of Wind Power/Gas/Storage

Environmental pollution and increasing shortage of non-renewable energy have become a major issue in the current sustainable development society.In order to solve the problems of absorption of wind power,environmental pollution and gas shortage.This paper designs a combined heating system consisting of power grid,wind farm,electric boiler,hot water storage tank and gas boiler.In this system,the wind farm is integrated into the nearby power grid,and then the electric boiler is heated to the residents nearby.Through the hot water storage tank and gas boiler,the fluctuation of wind power and user heat load is suppressed to meet the heating needs of residents.The system can not only absorb wind power in situ,but also reduce the pressure on power grid caused by wind power outgoing.The hot water storage tank in the system stores heat when the wind power is greater than the heating heat load,and releases heat when the wind power is less than the heating heat load.Because the calorific value of gas at the same price is larger than that of electricity,the auxiliary heat source is gas-fired boiler.The main work of this paper is as follows:Firstly,according to the heating load curve of residential district and the output power curve of wind farm to decide the capacity of electric boiler,hot water storage tank and gas boiler.Adjusting the gears of electric boilers according to the predicted output power of wind power,the power input from wind farm to power grid is basically the same as that from power grid to power boiler.This will makes the power input from wind farm to power grid is basically the same as the power input from power grid to power boiler.Due to the randomness and fluctuation of wind power.Five operation modes and corresponding control strategies are proposed in this paper.The purpose of the control strategy is to make the system meet the heating demand.At the same time,increasing the utilization rate of wind power.Secondly,establishing the model of wind power forecasting and the model of water supply temperature forecasting by using MATLAB.And then combing mathematical model of the system.Using TRNSYS and MATLAB to simulate heating system.The heating load in the simulation is calculated from the temperature and flow data of the return water of a district heat exchange station in Inner Mongolia during the heating season.And wind power output power comes from a wind farm of Inner Mongolia.Analysing the change of outlet temperature of electric boilers,hot water storage tank temperature and gas consumption when the wind power output power is different.The results show that the above capacity allocation method and control strategy can meet the heating demand of users.Finally,In order to reduce the capacity of electric boilers and hot water storage tanks.Calculating the capacity of electric boiler and hot water storage tank under different abandonment of wind power.Obtaing the electric field power generation,the total power consumption of electric boiler and the total gas consumption by simulation.Then the objective is to minimize the total cost and operating cost of a single heating season.The best capacity of electric boiler and hot water storage tank can be obtained by calculation.