| The level of energy development has always been an important indicator of the strategic strength of a country or a region and the degree of development of the national economy.In terms of energy applications,the inherent non-renewable problems of traditional fossil energy represented by coal,petroleum,etc.,improve energy efficiency,realize the mutual complementarity between different kinds of energy,and develop new energy sources to replace traditional fossil energy The scheme has increasingly become an inevitable choice to solve the current energy shortage and low energy utilization efficiency.On this basis,the concept and research of energy internet and integrated energy system came into being.At the same time,many countries have been facing a single energy structure and form for a long time,there is a contradiction between supply and demand during peak hours of electricity consumption,and the coupling between electricity and natural gas can greatly compensate for this situation.In the research field of existing integrated energy systems,power-natural gas coupling has become the most widely used.Therefore,in order to more efficiently realize the optimal distribution of multiple energy sources in the integrated energy system and improve the energy supply reliability of different energy networks,this paper focuses on the analogy of energy flow analysis methods and transfer optimization models for high-voltage distribution networks and natural gas pipeline networks.Conduct research,the main research content is as follows:(1)According to the future trend of deep integration of power and natural gas,considering the current industrial research and application areas for the analysis of the energy flow of integrated energy systems,the sub-modules analyze the status of natural gas networks and power grids separately.This paper proposes to make an analogy of the integrated energy system of power-natural gas coupling.After fully considering the possible impacts of different energy sources in the integrated energy system on operating scenarios,operating conditions,and physical limitations of equipment,the natural gas network components are equivalently The circuit gets the analysis model to simplify the analysis and modeling process of the integrated energy system.It provides a clear and simple research foundation for the modeling and expansion of subsequent coupling systems.(2)Based on the power-natural gas coupling mode in the integrated energy system,the concept of grid power supply is extended to the multi-energy interconnected system,and the concept of energy supply is introduced,that is,gas-to-electricity and Based on this,an optimized dispatch model for the interconnection of high-voltage distribution networks and natural gas pipeline networks is established.Thus,the steady state model of the natural gas system based on the high-voltage distribution network and the natural gas pipeline network is finally obtained..(3)Solve the optimization model of the above-mentioned high voltage distribution network interconnected with the natural gas pipeline network.The objective function of establishing this model is that the compressor loss of the natural gas pipeline network is the smallest,the gas supply at the partial gas distribution point is the largest,the number of switching operations of the power grid is the least,the operating cost of the G2 P and P2 G units of the natural gas generator set is the lowest;,Gas distribution points,compressor,valve and pipeline network operation constraints,as well as grid active power balance and grid radiation structure constraints,the genetic algorithm is used to solve the model,and finally,the 110 k V high-voltage distribution network and natural gas network interconnection system The analysis of the example shows the validity of the model in this paper. |
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