Analysis of a hybrid controlled three-phase grid-connected inverter with harmonics compensation in synchronous reference frame

H∞ Repetitive Control Based on Active Damping with Reduced Computation Delay for LCL-Type Grid-Connected Inverters

“…Therefore, the transfer function of H(z) can be derived by substituting C2(z), W(z), and P0(z) into Equation (16).…”

Power quality and low voltage ride-through capability of induction generator-based wind power generating system

“…RC technique for periodic signal control is researched extensively recently [21,57,58]. Periodic signals of period T can be generated by the system shown in Gs is a phase lead compensator and Q is a low-pass filter which could be set to be constant [19]. In general, zero steady-state error tracking of an external periodic input can be achieved by incorporating the RC scheme into a closed-loop system [59].…”

“…Alternatively, PIR control has been proposed in [6,16,17] An alternative approach for harmonic elimination is to use RC method [19][20][21][22][23]. The RC presents large gain at integer multiples of the fundamental frequency and is well known for its effectiveness in controlling harmonics [20].…”

“…A common approach for harmonic elimination is to use RC method [19][20][21][22][23]. RC is a technique based on the IMP [74] and is used specifically in tracking references or rejecting disturbances which occur periodically.…”

“…The repetitive controller presents large gain at integral multiples of the fundamental frequency and is well known for its effectiveness in controlling harmonics [20]. A hybrid scheme which combines PI and RC techniques has been proposed in [19] in order to reduce the current harmonics of a DC/AC inverter. However, it has yet to be extended for the case of stand-alone DFIGs.…”