Research On Energy Management And Energy Efficiency Evaluation Of Smart Home

Social and economic development and people’s pursuit of quality of life have caused the continuous increase of household electricity consumption,which has brought challenges to the upgrade and transformation of power grids.The energy consumption revolution requires the simultaneous use of clean energy and energy saving and efficiency,and a gradual shift to green and low-carbon energy.The energy consumption patterns and energy structure of household users have also changed.The household energy management system is an important support system for household users’ energy use information management and interaction with the power grid,providing a basis for users’ energy efficiency evaluation and optimization of energy use.It is of great significance for home users to participate in the operation of the power grid,to realize the interaction with the smart grid and to ensure the real-time power balance of the power grid.The thesis takes the energy consumption of household users as the research object,and conducts research on the household energy consumption management system and energy efficiency evaluation.The main tasks include:(1)The information modeling of household energy management facilities is completed,class diagrams of energy facility objects and use case diagrams and sequence diagrams of typical energy management scenarios are provided.Firstly,the household energy management system is analyzed,and an information model for the facilities of the household energy management system is established using UML modeling methods and Enterprise Architect tools.Secondly,a use case diagram is given to analyze the needs of three common scenarios of household energy management,including remote control and management of energy-using equipment,energy use information monitoring and early warning,and home user energy efficiency evaluation.A sequence diagram is used to describe the information interaction among the objects in the household energy management system.(2)A household energy efficiency evaluation index system is established,a home user energy efficiency evaluation method based on comprehensive empowerment and set pair analysis is given.Firstly,the typical structure of the household energy system is introduced,the common distributed energy on the user side are analyzed,and an indicator system is built,including the user’s electric energy utilization,distributed energy consumption,nonelectric energy use and energy costs.Secondly,the AHP-entropy weight method is used to determine the comprehensive weight of the index,and an energy efficiency evaluation method is established based on the set pair analysis theory,it is used to measure the closeness of each energy use plan to the optimal energy use plan.Finally,a calculation example is used to analyze and verify the rationality of the proposed energy efficiency evaluation method based on comprehensive weighting and set pair analysis.(3)A household energy management system is designed and developed,the design of the system architecture,functional architecture,database,and interface are completed to implement energy information monitoring and energy efficiency evaluation.Firstly,the system architecture,functional architecture,database and functional modules are designed.Secondly,the functional modules are completed,including user information management,remote control of energy-using equipment,power information monitoring and early warning,energy use information statistics and user energy efficiency evaluation.The function of each functional module is introduced.Finally,the household energy management system is displayed and applied.The work in this thesis can provide a certain reference for the development and application of household energy management system,and provide ideas for household users to save energy and improve efficiency.