A Fast and Effective Control Scheme for the Dynamic Voltage Restorer

Implementation of H<inf>&#x221E;</inf> controller for active voltage quality regulator under distorted grid

“…So, four standard second order functions aimed at line frequency compensation and three harmonic frequencies suppression are combined to form W 1 . The adopted standard second order function is similar to the resonant controller proposed in [12] as: 1 …”

“…As provided in Fig.6, larger K I1 will increase the resonant peak without changing the resonant bandwidth, while ω cut1 will influence both the gain and phase. Detailed analysis of the resonant controller can be found in [12].…”

“…Key features related to the evaluation of highperformance control algorithms are usually their transient response and steady-state accuracy. Varieties of welldesigned controllers for SDs have been analyzed and verified in literatures [8][9][10][11][12][13][14][15][16][17]. In [8,9], proportional resonate controllers are adopted to compensate for both the fundamental and harmonic voltages.…”

“…In [10,11]，repetitive controllers are introduced to improve the compensation accuracy as well as the harmonic suppression abilities. In [12,13], two different fast control schemes with minimized dynamic response are presented for three phase systems. There are also many other control algorithms, including Multi-loop control with capacity current feedback [14], statefeedback control [15], predictive control [16] and generalized proportional-integral control [17], are proposed for different control requirements.…”

A New Transient Power Quality Disturbances Detection Using Strong Trace Filter

“…In real application, the earlier to trigger the protection device when there are transient PQDs, the safer grid and customers will be. Sadly, KF trace has delay to response the transient PQDs [13].…”