Software Research Of The Grid Grounding Resistance Measuring Equipment Based On Embedded System

grid grounding resistance value is the most important technical parameter of the grounding system in power plant,transformer substation and some other places. Whether right the Ground Resistance value is directly impact on whether safely work the power system can. However, because there are some errors between the design value of ground resistance and the actual value of it, the measurement of grounding resistance become into one of the issues which electricity workers long-term research in. To solve this problem, the researchers gave a variety of testing methods and base on some of these methods developed a variety of measurement equipment. At present, developing an equipment which can easily and accurately measure the true value of the grid grounding resistance have became the goal that companies are eager to achieve and work hard for.Firstly this paper describe the meaning of grounding resistance measure and development background, enumerate the various ground resistance testing theories, methods and related measurement equipment in different historical periods.Secondly, this paper analyze the different frequency measurement and four pole way of wiring which can reduce the interference.Thirdly, according to the measuring method and functional requirements, the measuring equipment adopt dual-core system that base on ARM chip and DSP chip. They take through the dual-port RAM for data exchange. Chapter III in paper, the hardware structure of the system are described, and the main chip and peripheral equipments are introduced.The focus of this paper is the design of software equipment.TransplantμC/OSⅡembedded real-time operating system on the ARM core chip. Chapter V for the ARM part, main program are designed in accordance with the function modular. Chapter VI as part of DSP, firstly analyze the data-processing algorithm, followed with a detailed description of the various functions of the implementation process.