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Selective harmonic cancellation has become of primary importance in a wide range of power electronics applications, for example, uninterrupted power systems, regenerative converters, and active power filters (APFs). In such applications, the primary objectives are an accurate cancellation of selected harmonics and a quick speed of response under transients. This paper provides a novel signal-processing...
This paper presents a new digital open loop architecture as an alternative to Phase locked loops (PLLs) for grid synchronization. The system calculates in real time the Fourier coefficients of the input signal fundamental component using a heterodyning algorithm. Once the fundamental components are calculated the system can reconstruct the input fundamental signal and calculate its phase angle, frequency...
With the aim to minimize the harmonic disturbances created by non linear loads, the active power filters have an important role in the improvement of power quality. Active filters need to identify the harmonic components of some specific system currents/voltages to calculate the filter current/voltage references and thus set the power devices switching to compensate for the harmonics. Therefore, the...
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