Energy Management System Integrated Rooftop Photovoltaic And Distributed Energy Storage

Distributed energy is an important developing direction of future energy supply.It can improve the safety and reliability of energy utilization effectively.Microgrid as an effective way of distributed energy utilization has been researched and applied widely.This paper designed an energy management system of microgrid that integrated rooftop photovoltaic and distributed energy storage,realized energy management of microgrid and optimum operation of the load,and reached the purpose of making full use of renewable energy sources and load side management.This paper mainly completed the following works:1.The domestic and overseas development present status of the microgrid energy management was introduced,and then summarized operational control approach and correlative technique problem of the designed energy management system.The energy management system combines the characteristics of AC and DC microgrid.It manages the distributed generation in the DC side intensively and controls the operation of load through the switch array in the AC side,and also improves the flexibility and reliability of operation mode.2.The energy management system overall design scheme was proposed;the design of each main module,such as master control,acquisition,communication,store and display module,etc,were completed.The acquisition module is responsible for collecting electric energy information on the distributed generation and load side,the master controller coordinates various modules and controls the operation models of converter and load according to the information of distributed generation connected to microgrid and load.3.According to hardware structure and management strategy of energy management system that integrated rooftop photovoltaic and distributed energy storage,this paper carried on the system software design and completed the program design,such as the system master control program,acquisition and store program,load control program,power management program and operation state conversion program.4.According to design scheme of energy management system that integrated rooftop photovoltaic and distributed energy storage,this paper established the energymanagement system experimental platform,tested the electrical parameters of the typical load and realized the effective management of power supply,load and energy storage at different operation modes,and stable operation of the system.The designed energy management system can supervise distributed generation connected to the microgrid and load so as to build electricity information database,and combine electricity consumption situation with the regulation of energy storage device to realize efficient management of distributed generation and effective control of load side.The system has a good stability and reliability in the distributed generation and load management field,and is suitable for home and building and other practical application places.