Research On Planning,Operation And Benefit Evaluation Of Integrated Energy Microgrid

The problems of environmental pollution in the process of human social development and the inability of traditional primary fossil energy sources such as coal and oil to meet the sustainable supply of global energy are becoming increasingly prominent.As an important secondary energy,electric power will play an important pivotal role in linking primary energy and secondary energy in the future energy network.Utilizing advanced management modes and technologies,integrating various types of energy resources such as electricity,natural gas,oil and coal in the region,and building a comprehensive energy system with electricity as the core can promote the efficient development and utilization of renewable energy,gradually reduce the proportion of traditional fossil energy in the energy supply system,thus promoting the adjustment of energy structure and improving the energy utilization efficiency in China and guarantee the safety of energy supply in China.As an important form of integrated energy system and energy Internet in the future,integrated energy microgrid will play an important role in promoting the local absorption of renewable energy,realizing the coordination and optimization between various types of decentralized energy units and backbone power grids.To ensure the healthy and sustainable development of integrated energy micro-grid,we should start with the following aspects.Firstly,in order to support the long-term and stable development of integrated energy micro-grid system,it is necessary to comprehensively analyze the various indicators involved in the process of planning investment and optimizing capacity allocation,as well as the uncertainties such as distributed renewable power output.upstream electricity wholesale market price,user power consumption,heat and cold,etc.,so as to obtain the optimal system construction scheme.Secondly,in order to improve the flexibility,economy,security and comprehensive utilization of energy supply,we need to consider the use of scientific and effective technology and comprehensive operation optimization objective tools.Thirdly,in order to improve and perfect the decision-making level in the whole process of energy production,transportation and consumption year by year,it is necessary to use scientific means to evaluate the energy efficiency in the integrated energy micro-grid system.Finally,in order to achieve a reasonable and efficient operation of all kinds of energy suitable for the future market,it is urgent to study the current emerging technology means and advanced trading concepts,and explore a new market operation mode.At present,although the planning,operation and benefit evaluation of traditional microgrid have been systematically studied,there is no complete research framework for planning,operation,benefit evaluation and operation mode of integrated energy microgrid.In view of this,this paper will study the related models and methods from the planning investment,dispatching operation,comprehensive benefit evaluation and operation mode of integrated energy micro-grid system,as follows:(1)In order to obtain the optimal system construction plan based on multiple indicators and multiple uncertainties in the process of comprehensive analysis and construction investment and capacity optimization,a comprehensive energy microgrid system planning research based on stochastic optimization model is proposed,which fully considers multiple constraints.Multi-objective nonlinear complex optimization problems and distributed energy intermittent and uncertain,achieve relatively accurate consideration of the performance of the integrated energy microgrid system,and analysis tool integrated energy operators to make plans in the future.(2)In order to improve the flexibility,economy,security and comprehensive utilization of energy supply,a two-stage stochastic optimization-based integrated energy micro grid operation optimization study is proposed.The physical characteristics of natural gas and power systems are selected to model and the day-ahead scheduling optimization model of integrated energy microgrid is constructed.The effectiveness of the model is verified by numerical simulation.Various uncertainties affecting the operation and decision-making process of the system are analyzed,scheduling operation and decision-making process,and realizing the integrated energy micro-grid Optimization of standby and energy scheduling.(3)The systematic benefit assessment of the planning and operation of integrated energy micronet is an important means to ensure its orderly and high-quality construction and optimize and improve its operating mode.By constructing a comprehensive benefit evaluation index system of multi-energy micronet,the planning scheme is compared,and on the basis of constructing the comprehensive benefit evaluation index system of multi-energy micronet,the index calculation process is closely integrated with the system planning and operation scene.Through the appropriate model,considering the main objective empowerment characteristics in the process of index calculation and analysis,the combination empowerment method is used to evaluate the comprehensive benefit of each indicator weight,and achieve more objective and accurate evaluation results.(4)In view of the realization needs of reasonable and efficient operation of various types of energy in the future market,explore and propose the integrated energy micro-grid operation mode in the future market environment.Based on the new technology of block chain and the basic concept of tradable energy system,it designs the framework,application and process of the integrated energy micro-grid operation mode,and solves problem in the rapid development of distributed energy with the change of energy sources,as well as the problem on demand-side user consumption and production dual-role development does not match information opacity and cumbersome process.