Research And Design Of Power Quality Monitoring And Manage System Based On VS2005

太原理工大学硕士研究生学位论文Electricity has been considered one of the widely applied energy in modern society. Along with the socialist market economy construction becoming more and more perfect, power production also needs to adapt to the development of market economy. At the same time, it is of necessity to monitor and supervise the power quality in order to decrease the inconvenience and economic loss that caused by the various power quality problems. The project in the thesis is one of important part of " The study of power quality monitoring device " supported by the technology fund of The Shanxi Science and Technology Department, which is proposed to the increasingly complex power quality problems at present. Power quality monitoring system based on VS2005platform is developed for this purpose.The relevant national standards and the industry standards of the power quality have been introduced in the thesis. Then preamplifier unit in hardware configuration that the VS2005platform design based on has been stated. Finally the software perspective of detailed power quality monitoring system development process has been set forth.As in Hardware, it includes the selection of CPU and A/D chip, the data acquisition module, a data communication module and data storage module main realization process and function. According to the hardware conditions, the design adopts modularized design idea which based on the VS2005platform. The data module, communication module, database module and the PQDIF file in the system has been designed in detail; In addition, the windowed FFT algorithm has been mainly introduced about the harmonic, interharmonic measurement by C#and Matlab mixed programming technology. This technology give full play to the C#graphical interface programming processing, transmission control information superiority, as well as Matlab powerful signal processing functions. Besides, in coordination with the SQL databases, it is believed that the developing period of the software can be greatly shortened which contributes to the efficiency of the research development. At the same time, this paper is complemented by a large number of simulation examples and pictures, so visually evaluation algorithm the precision and the platform operable. According to the overall design ideas, set up to B/S based power quality monitoring platform which provides historical data query, waveform graph query, power quality analysis results query and PQDIF format data query function.This paper has provided the analysis of the power quality monitoring in terms of the theoretical and practical aspects. Also, further applications have been implied in the research that is certain to exert significant influence on the market development of power quality. KEY WORDS:power quality monitoring, the VS2005, NET, the interpolating windowed FFT, DSP, Condition Monitoring...