Synchronization of active power filter current reference to thenetwork
Nedeljkovic, D.; Nastran, J.; Voncina, D.; Ambrozic, V.
Industrial Electronics, IEEE Transactions on
Volume 46, Issue 2, Apr 1999 Page(s):333 - 339
Digital Object Identifier 10.1109/41.753772
Summary:This paper presents an improved method of current reference
determination for a parallel active power filter. To insure sinusoidal
line currents, thus reducing reactive power, an integrative method of
reference calculation is applied. As a result, satisfactory response of
line current to the load change is achieved. One of the major problems,
the synchronization to the net voltage, is also considered. Classical
solution is based on zero-cross detection of line voltage. Since this
approach is very sensitive to the voltage distortions, a new method is
suggested, relying on voltage fundamental harmonic calculation. These
ideas were tested on a three-phase active power filter, controlled by
32-bit microcontroller
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