Synthesis of Sinusoidal Waveform References Synchronized With Periodic Signals

BUSADA CLAUDIO; CHIACCHIARINI HÉCTOR; BALDA, JUAN

IEEE TRANSACTIONS ON POWER ELECTRONICS

IEEE

Año: 2008 vol. 23 p. 581 - 590

0885-8993

This paper proposes a novel method to generate a sinusoidal waveform synchronized with any measurable periodic signal whose frequency is within a given neighborhood. The synthesized sinusoidal signal could be used as a reference current for certain applications of parallel active power filters or any other where such synchronization would be necessary (e.g., ac/dc converters for renewable energy resources, power factor correctors, power supplies, UPS, etc.) The method is based on the behavior of a dynamical system and avoids employing the usual combination of phase-locked loop (PLL) and lookup table found in most parallel active filters synthesizing a sinusoidal source current (a table also means using significant storage memory). The novel method produces two high-quality sinusoidal waveforms that are in quadrature and is applicable to those parallel active filters whose control methodology is in the alpha-beta reference frame, or alternatively, it produces three sinusoidal waveforms shifted 120 degrees for designs that work in the abc frame. Here, a (2 + 1)th order implementation is described, including a proof of convergence. For its most simple implementation ( n = 1), simulated and experimental results are included. (2 + 1)th order implementation is described, including a proof of convergence. For its most simple implementation ( n = 1), simulated and experimental results are included.