Control of the frequency spectrum with the help of open loop and closed loop algorithms in active filters

This paper proposes two frequency based methods for parallel active filtering of current harmonics in utility grids. Active Filter (AF) reference prediction and AF current control are the two key-points to obtain high performances. This paper deals with the AF reference prediction. The two proposed methods are based on the Fourier Series and its implementation on DSP. They belong to two prediction structures: the open-loop structure which predicts the reference currents from the load currents, and the closed-loop structure which predicts the reference currents from the grid currents. Fourier Series based methods are very flexible and have several interesting properties as the delay compensation of the current controller. These two methods have been successfully implemented and tested. The closed-loop predictor cancels permanent errors and results in better performances. Both methods are very flexible. This paper describes these methods and compares them with classical methods.

Presented at:
PCIM 2002 : International Conference on Power Electronics, Intelligent Motion and Power Quality, Nürnberg, Germany, 14-16 May 2002

Note: The status of this file is: EPFL only

 Record created 2005-11-18, last modified 2018-03-17

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