Single-phase shunt active power filter using frequency limitation and hysteresis current control

Investigation of "Unified Voltage Conditioner - UVC"

“…Fig.8 displays a block schema for implementation of the control system of Bidirectional AC/DC Converter. The hysteresis-current control method similar to those applied at Shunt APF [18], [19] is used. The value of the intermediate DC voltage across the capacitor is continuously monitored AC/DC Converter maintains power factor higher than 0.98 both in rectifier and inverter modes, regardless of the load type.…”

Double-band hysteresis current-controlled single-phase shunt active filter for switching frequency mitigation

“…Various control strategies have been proposed in recent publications for this type of active filters [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. These control strategies have their own advantages and disadvantages related to control complexity, switching frequencies, and dynamic responses.…”

“…Among the current-control strategies, the conventional singleband hysteresis current-control (SBHCC) scheme offers higher accuracy, fast dynamic response, robustness and simplicity in implementation [22,23]. Despite these advantages, the SBHCC has a major disadvantage that the switching frequency is very high at lower modulation index which increases the switching losses.…”

“…Hence, the overall switching period of the inverter in one cycle is twice of the period in (22). Therefore, the switching frequency during one cycle is calculated to be…”

Evaluation of the energetic and operational efficiency in active power filters using fuzzy logic control for microgrid applications

“…The classical linear control methods used in APF's generally works well, nevertheless, with the out coming of new technologies, the nonlinear loads tends to be more significant than the others, and its usage in the industrial and domestic environments has been incremented, with this, the addition of distortion into the current waveform has been incremented too, and also the control methods of APF have diversified [9][10][11][12][13][14][15][16][17][18][19][20]. This work is supported by the investigation Project "Evaluación de la Eficiencia Energética de Sistemas Electrónicos para la Compensación Reactiva y Mitigación de Armónicos de Corriente en Micro-redes Industriales" and "Prototipo de una Micror-red Eléctrica en la Universidad Distrital Francisco José de Caldas PME-UD" approved by the CIDC of the Universidad Distrital Francisco José de Caldas through 20 For that reason, the evaluation of the performance of nonlinear controllers such as those based on fuzzy logics to solve the distortion problems is needed.…”