Research On Capacity Configuration Of Distributing Energy System Based On Optimized Operation Strategy And Algorithm

Distributed energy systems utilizing renewable energy in the form of distributed energy systems are an important means to achieve the "3060" strategic goals of China,and an important measure to build a clean,low-carbon,safe and efficient energy system.Wind/solar/diesel/storage complementary systems are typical distributed energy systems structures with high stability and safety,but their high construction costs,low resource utilization and lack of stability,severely limit their commercial promotion and application.Optimizing the capacity configuration of wind/solar/diesel/storage power generation systems can effectively reduce system costs,improve renewable energy utilization,and increase system stability.Based on the planning and design requirements of distributed energy systems,this paper focuses on the two key technical issues of operation strategy and optimization algorithm,and takes the off-grid wind-solar-diesel-storage power generation system and grid-connected wind-solar-storage power generation system as research objects.A microgrid distributed power and storage output power model is established,and the target function analysis method is used to carry out research and discussion.The main work is as follows.In terms of operation strategy optimization,for the key issue of how to allocate net load power,an improved diesel generator priority tracking net load operation strategy is proposed.Taking an off-grid wind/solar/diesel/storage power generation systems as the research object,with economic efficiency as the objective function,and constraints including wind-solar unit minimum power constraints,storage device charging and discharging depth and times constraints,diesel generator constraints and power balance constraints.Reliability,wind-solar complementary characteristics and environmental protection are taken as evaluation indicators.At the same time,HOMMER is used as optimization algorithm for simulation calculation.The results show that when the optimized operation strategy is adopted,the number of wind turbines installations decreases by 1,the number of photovoltaic units decreases by 299,the number of energy storage batteries decreases by 172,the number of diesel generators remains unchanged,the total cost of the system decreases 401,999yuan,the load shedding rate increases by 0.01,the wind/solar complementarity decreases by 0.14,and the emission of CO2 and other pollutants decreases by 70,000kg.In terms of algorithm optimization,for the problems of the seagull optimization algorithm slow convergence and low accuracy during iterative optimization,a golden sine-guided and Tanh function-continuous seagull algorithm is proposed,along with the introduction of a greedy strategy.Taking the grid-connected wind/solar/storage power generation system as the research object,with economic efficiency,wind/solar complementarity,and renewable energy consumption rate as the objective function,and constraints including power balance constraint,distributed power output constraint,purchase/sale power constraint with the main grid,and wind/solar curtailment rate constraint.In addition,a time-of-day operation strategy is used in the operation strategy.The results show that when the improved optimization algorithm is adopted,the number of wind turbines increases by 3,the number of photovoltaics decreases by 201,the number of storage batteries decreases by 201,the number of energy storage batteries decreases by 103,The system cost is reduced by 299,809 yuan,wind/solar complementarity decreases by 0.05,and the renewable energy consumption rate increases by 0.08.In summary,the scientific and advanced nature of the improved operation strategy and improved optimization algorithm proposed in this paper have been verified.The related conclusions can provide important theoretical basis and technical guidance for the development and application of distributed energy system.