Research And Implementation Of Embedded Smart Grid’s Energy Efficiency Terminal

The Smart grid is considered as the universally accepted approach in world electric power industry to solve the challenge of energy shortage. The developments of smart grid are moving to more flexible, cleaner, safer and more economic functions. To make this happen, data collection and power quality monitoring on each electric consumer tend to be the main research areas, which will not only provide a reasonable basis to generate electricity bills, but also monitor real-time power consumption of each power consumer. Large power consumers shall better optimize the resources to achieve energy conservation and emission reduction with deep analysis of these data collected.The paper designed a terminal based on the requirements of cooperative company and along with future trend of development. This portable device was created after referring to the developed devices such as data collector, concentrator and power quality analyzers. There are two main approaches taken in this paper—RS-485 communication and DSP chips(processing the power quality data)—to enable the functions including collecting electricity data of smart meter and monitoring power quality. The main work as followings:The first step is to build a hardware platform. This paper selected Samsung’s S3C6410 chip as the core controller after comparing various on-chip resources. Based on the on-chip resources, the paper built extended peripheral power, reset, storage, display and communication circuit, which laid a solid foundation to realize the functions. In the aspect of power quality monitoring, the paper researched different harmonic measurement methods and adopted FFT algorithm to process the electricity signal on DSP chip. After that, researchers conducted the operating system porting. The Linux-3.0.1 was chosen as the operating system which is easy cut and configurable open resource. In order to make the system up and running, researchers cross compiled Bootloader, modified Kernel and the drivers as per the hardware platform and made the root file system by using Busybox. For a friendly user interface, the researcher adopted the Qtopia desktop environment. Researcher studied the application development under this hardware framework and prepared for writing core applications.Towards the end, the researcher wrote the code which running under the framework of Qtopia in complying with power communication protocol and the definition of electricity.