Power Quality Testing Device Design Based On DSP

With the rapid development of power industry,electric power system to the Power generation,transmission,distribution,the acquisition of electricity consumption has been a higher demand.Collected for electricity Power system for real-time control, monitoring,scheduling automated links premise,there is no doubt play an important role.However,in the process of power acquisition,Because of the existence of harmonic interference and other factors,so how quickly and accurately capture all of the power system simulation power system has been the volume of research is an central issue.The actual use of a variety of power quality testing devices,with good performance but very expensive which most users can not afford,and it is difficult to promote the function of either a single price,can not fully grasp the power quality parameters.Therefore,it is necessary to develop a full-featured,for the promotion of the power quality testing equipment.Power Quality Monitoring multi-terminal measurements of voltage and current signals,when the grid frequency changes,synchronous sampling technique is needed in order to ensure the accuracy of the calculation.In this paper,an analysis of the current power sharing based on the sampling technique,the following aspects of an in-depth analysis and research:(1) In this paper,the exchange of sampling methods used in sampling are discussed in detail,including synchronous sampling hardware,software,synchronous sampling,non-synchronous sampling,quasi-synchronous sampling,sampling methods for the realization of a variety of methods and sample results were analyzed and comparison,and ultimately determine the most appropriate way of sampling the actual situation.(2) The exchange of samples of the commonly used parameter measurement algorithm for an in-depth research,including fixed-point algorithm,Discrete Fourier algorithm(DFT),fast Fourier algorithm(FFT),complex algorithms such as Fourier series,and the key Derivation of the algorithm and simulation platform for building MATLAB simulation,the final choice of the algorithm for the topics.(3) According to the demand for electric power monitoring terminal,the test terminal we design is based on the DSP chips TMS320F2811,in the paper we will discuss the hardware design with schematics,flowcharts,block diagram,introduce signal acquisition,analog-to-digital conversion,communications,and other modules the hardware implementation.(4) Using DSP/BIOS real-time kernel as the system in order to mandate the form of thread in various sub-function modules arrangements and the allocation of system resources,in the DSP/BIOS kernel as a basis,the use of software flow chart system block diagram,sample code,the system software design for a detailed analysis and design.