| In recent years,the proportion of new energy power generation has gradually increased,but the ensuing problems of grid connection and consumption have also become the bottleneck restricting its development.Among them,the phenomenon of wind/PV curtailment is particularly prominent.The emergence of integrated energy systems can not only improve energy efficiency,but also meet the needs of users for multiple types of energy.In view of the problem of wind and light consumption,this paper uses the multi-energy complementary integrated energy system to optimize the scheduling,which can effectively improve the level of consumption.And consider the use of demand side resources to further improve the capacity of consumption,and finally propose a two-stage scheduling model that takes into account the source-load resources,and verify the validity of the model.Firstly,in view of the problem of insufficient capacity of traditional distribution network,this paper proposes to use the multi-energy complementary features of integrated energy systems to improve the ability of scenery absorption,study the operational characteristics of various equipment in integrated energy systems,and establish corresponding mathematical models to lay the foundation for optimal scheduling of integrated energy systems.The goal is to optimize the system operation cost and the cost of wind/PV curtailment,and construct the multi-energy complementary energy system optimization scheduling model,and analyze the output of the heat pump and energy storage device in the system and the system operation,and compare the effect of the traditional power supply with the CCHP on the consumption of wind power,the results of the example show that the joint supply system can effectively increase the proportion of new energy consumption and improve the economics of system operation.Secondly,in order to improve the consumption ratio of new energy,this paper introduces the flexible load with temperature control load and electric vehicle load in the system,establishes the corresponding mathematical model according to its load characteristics,and uses the direct load control method in the incentive demand response to dispatch.The optimal scheduling model is established with the goal of abandoning wind/PV penalty cost,the grid subsidy cost,and the lowest power purchase cost of the upper grid,and compare the not introducing load response.The results show that the system load curve tends to be smooth and the peak-to-valley difference is reduced.The new energy consumption rate has increased,and it also reflects the limited capacity of the load response and the rational use of source-load resources.From the perspective of comprehensive consideration of source-load interaction,owing to the prediction accuracy of wind/PV power generation output does not match the source-load resource response time,a day-ahead intra-day two scheduling model is established to analyze the impact of the industrial high-energy load response to CCHP system operation and new energy consumption in the day-ahead dispatch,the impact of incentive load response participation scheduling on the operation of each equipment in intra-day scheduling,using the non-dominated genetic algorithm with elite strategy to solve the model.To compare with the previous two chapters scheduling scheme,the results show that the model has better effect on new energy consumption under the condition of source-load joint resource dispatch,which not only improves the system load level but also has better economic benefits. |
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