Development Of Distributed Energy IoT Management Platform Based On Niagara

Natural gas distributed energy system has the characteristics of high comprehensive energy utilization efficiency,clean and environmental protection and high safety.It realizes the cascade utilization of energy and is the best way to efficiently use natural gas.Today's IoT(Internet of things)technology is also developing rapidly.Combining distributed energy systems and Internet of Things technology meets the requirements of energy conservation and environmental protection and building a conservation-minded society.This platform is based on the micro turbine distributed energy system built by a university.Through Niagara IoT technology,a Niagara-based distributed energy IoT management platform is built.The distributed energy system uses a micro turbine as a generator set to provide electricity for the equipment in the system.The high temperature flue gas discharged from the micro turbine is used for the waste heat recovery and utilization unit.In the summer,the end rooms is cooled by the flue gas LiBr absorption unit(hereinafter referred to as "cold and warm water unit").In the winter,heat is supplied to the end rooms by the cold and warm water unit and water source heat pump.Due to the flexibility,energy saving and adjust ability of the system itself,it has become a hotspot in recent years.The topic is based on Niagara Framwork and Internet of Things technology to develop a distributed energy system monitoring and management platform.In the hardware platform,the distributed energy system is divided into flue gas system and water system.According to the monitoring principle,suitable measurement points(such as temperature measurement point and pressure measurement point of flue gas and so on)are arranged,a hardware architecture platform is designed and a hardware control cabinet is built.As the core of the system,JACE-8000 network controller communicates with the host computer(PC server)through TCP /IP protocol.Through MODBUS protocol,the network controller is used to communicatewith field devices and exchange data by RS-485 interface.In the software system,the Internet of Things management platform uses Niagara Workplace N4 for software development.First,the JACE-8000 network controller is integrated into the software site.Through the JACE-8000 network controller,the real-time data transmitted by the field devices and the host computer form an information interaction.A visual monitoring interface was built and the interface was divided into functional areas.The operating process,real-time operating parameters,and equipment start-stop status of the micro turbine distributed energy system were displayed on the monitoring management platform.In-depth analysis of the data in a modular programming manner to obtain real-time comprehensive energy utilization and other parameters of the distributed energy system.At the same time,We can log in the IP address through a Web browser under the same local area network.The platform can be remotely accessed by another computer or mobile phone which realizing the real-time and convenience of the system monitoring.On the basis of the completion of the construction of the management platform,two rational control strategies are proposed for the system based on the principle of "determining electricity with heat".Using temperature difference and temperature as the adjusted parameters,the frequency conversion control of the circulating water pump and the automatic adjustment of the electric adjustment butterfly valve opening are realized,which is in line with the basic concept of green energy saving and intelligentization of the building.Through the load calculation of the end rooms,the operating performance of the system is analyzed.The results show that the system monitoring and management platform can well meet the requirements of the system's comfort and energy saving.The annual average energy comprehensive utilization efficiency of the distributed energy system has also reached the basic requirements.Through verification,the Niagara-based micro turbine distributed energy system IoT management platform can combine Niagara IoT technology with distributed energy technology,accurately process and analyze the data of the system and ensure functions of the system stably and efficiently.