| "Carbon peak,carbon neutrality" is the global trend.Driven by the goal of "double carbon",China encourages the development of green energy.As a clean energy with zero emission,wind power generation has been widely used.However,the intermittence,randomness and anti-peak shaving characteristics of wind power limit the grid connected consumption of wind power,resulting in a large number of abandoned wind,so that wind energy can not be fully utilized.As a clean secondary energy,hydrogen energy has high energy density,large capacity and abundant reserves.In the integrated energy system,hydrogen production from abandoned wind can reduce carbon emissions from the source,and realize the efficient utilization of wind energy in many ways.At the same time,energy storage technology is an important medium to realize multi-energy integration and cross-energy network collaborative optimization.Under this background,this paper proposes the optimal scheduling method of integrated energy system with wind power hydrogen production and multiple energy storage.Considering the joint optimization of hydrogen-cold-heat-power multiple energy storage and load demand response,the carbon emission of the system is analyzed,and the impact of wind power output and load uncertainty on the system is studied.The concrete research contents are as follows:(1)From the perspective of power supply side,the concept of energy hub is analyzed,and an integrated energy system architecture including wind power hydrogen production and multiple energy storage is established.The integrated energy system is modeled from four aspects of energy supply,energy conversion,energy storage and energy distribution.From the perspective of load side,considering the impact of price demand response and incentive demand response on the system,the demand response based on real-time price and interruptible load is modeled.(2)In order to integrate more wind energy into the power grid and reduce carbon emissions,a low-carbon economic dispatch model of integrated energy system with wind power hydrogen generation and multiple energy storage is proposed under the demand response strategy.The model takes the maximize operating profit as the objective,introduces the wind abandonment penalty cost to deal with the wind abandonment behavior,comprehensively considers the total energy sales revenue,energy consumption cost,carbon emission cost,hydrogen production cost and interruptible load compensation cost,and takes into account the constraints of power balance and unit equipment operation to optimize the output of each unit and the curve of electric load.The simulation examples are used to analyze the system scheduling results,wind power consumption level and carbon emissions under five cases.At the same time,the carbon emissions of hydrogen fuel cell vehicles and fuel vehicles are calculated and compared under the same mileage,so as to quantify the social carbon emissions saved by hydrogen fuel cell vehicles.The results show that the integrated energy system with wind power hydrogen production and multiple energy storage can increase the consumption of wind power,improve the system economy,reduce carbon emissions,and help to achieve the goal of "double carbon".(3)In order to study the impact of wind power output and load uncertainty on the system,day-ahead economic dispatch model of integrated energy system based on fuzzy chance constraint is proposed.The model takes the maximum daily operating profit of the system as the goal.The uncertainty of wind power output and load is expressed by fuzzy variables,and the model with fuzzy variables is transformed into a deterministic mixed integer linear programming model in the form of a clear equivalent class of fuzzy chance constraints.The Gurobi solver is used to solve the model.The results show that the optimal economic performance of the system can be achieved under acceptable operation risk by adjusting reasonable confidence level and ambiguity. |
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