Research On Power Quality Analysis Algorithms And Software Development

With the development of modern information technology and industrial automation technology,people have more and more stringent requirements for power quality.The problems caused by the decline of power quality have also attracted the common attention of experts and scholars at home and abroad.Therefore,the study of power quality detection algorithm and the establishment of power quality detection and analysis system are of great significance for the improvement and enhancement of power quality.In this paper,power quality analysis algorithm is studied,and a harmonic detection algorithm based on group search optimization algorithm is proposed.The accuracy and reliability of the algorithm are verified by simulation analysis.In addition,This paper designs a dual-core power quality analysis system based on ARM+DSP and Linux.In this paper,the main functions of interface display and human-computer interaction are realized on ARM side,and the calculation function of power quality algorithm is realized on DSP side.Besides,the function and effectiveness of the system are verified by experiments.The main contents are as follows:(1)The parameters of power quality and the methods of calculating the indexes of power quality are studied.Then,the solution method of discrete flicker is introduced.What's more,a three-spectral interpolation FFT algorithm based on Rife-Vincent window is introduced.The accuracy of the algorithm is verified by simulation experiments.(2)The harmonic model is introduced,and a harmonic model detection algorithm based on group search optimization algorithm is proposed.The method combines the least squares method with the group search optimization algorithm,which improves the acquisition accuracy of the harmonic model and has a good analysis effect for the interharmonic signal.(3)The software design of power quality analysis system based on dual-core platform of ARM + DSP is realized.On the ARM side,a Linux cross-compiler platform is built,a graphical user interface is designed,and the dynamic drawing of voltage and current waveforms and harmonic histograms is realized by using C++ classes written by ourselves.Meanwhile,an improved multi-interface design method is proposed,which makes use of the dynamic creation and destruction of class objects to accelerate the response speed of the system.Moreover,multi-threading technology is used to realize complex functions such as task scheduling and information exchange,which saves system resources.On the DSP side,the power quality analysis algorithm is compiled.Besides,using SYSLINK module,the two cores of DSP and ARM can exchange data and messages in shared memory,which makes the development of dual-core communication more concise and efficient.