| In recent years,the huge advantages of integrated energy system in mobilizing multi-energy synergy benefits,improving energy comprehensive utilization rate,reducing greenhouse gas emissions and other aspects have been unanimously recognized by researchers in related fields,and it has become a new direction for countries in the world to explore green and sustainable development of energy.As the fundamental premise of accurate and optimal control,modeling has always been an important research direction of integrated energy systems.With the improvement of user demand and the progress of science and technology,the construction scale of integrated energy system featuring open and sharing is increasing day by day.The diversity of access of energy conversion equipment makes the energy flows of gas,electricity,cold and heat contained in the system highly coupled.The large-scale introduction of distributed clean energy and energy storage devices aggravates the complexity of the system structure.The extremely complex coupling relationship brings great challenges to modeling and optimal operation control.Therefore,this research explores a standardized segment modeling method based on energy hub for integrated energy system,and achieve fine modeling of the complex structure of multiple energy flows in the system with the idea of partial matrix At the same time,the corresponding computer modeling algorithm is established to realize the automatic construction of the system model,which greatly reduces the complexity of the construction of the integrated energy system model,and provides a scientific and reliable model support for the follow-up research on the optimal operation control of the integrated energy system.Firstly,the distributed clean energy,composite energy storage device,multiple energy conversion device and complex multi-energy flow coupling port connected to the integrated energy system are comprehensively considered,their operation mechanism is analyzed,and the principle of segment modeling is pointed out.The segment modeling method was established,that is,the graph theory integrated system structure,the energy conversion units arranged,the virtual energy conversion units inserted,the segment model constructed and the coupling solved step by step.The energy hub model was finally established.Secondly,in order to reduce the complexity of artificial modeling and improve the accuracy of modeling,the computer generation method of integrated energy system segment model is studied.Based on the segment modeling method,the adjacency matrix reflecting the multi-energy flow structure of the system was constructed,and the DFS energy flow path exploration algorithm and the partial model automatic construction algorithm were written based on the computer iterative solution thinking,so as to realize the computer automatic construction of the partial model of the integrated energy system.Finally,according to the optimal operation control case of the park integrated energy system with adiabatic compressed air energy storage device,the energy hub model of the system is established based on the method of segment modeling,and a single target optimization operation model of the system is built,which considers the energy purchase cost and environmental protection factors.The commercial solver CPLEX is used to solve the model,and an optimal operation control strategy of integrated energy system based on energy hub is established.By comparing and analyzing the optimization results of typical examples,it is verified that the proposed method can accurately describe the multi energy flow model of integrated energy system including renewable energy,complex energy storage devices and demand response.The energy hub model established by the segment modeling method can also ensure the accuracy and efficiency in the process of solving the optimal operation problems. |
PDF Full Text Request