| Along with the development of power electronic devices, the harmonic problems caused by them are rising in power plants and the power quality is declining as well, which influence the safety and economy of power plants badly.This paper makes a research on the causes, detection methods, analysis methods and the principle of the harmonics in power plants and also explores the measurements of the general regulations.Started with the physical mechanism and scale of the harmonic problems, there is an analysis on the destroy of them and an illustration on the harmonic detection methods, combination window functions and then how to restrain the harmonics and choose the methods of passive and active filtration and style is also described. At last several methods to optimize harmonics are put forward and compared. |
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