Sensorless PWM rectifiers with active filter action

Ketzer, Marcos B.; Jacobina, Cursino B.

doi:10.1109/isie.2015.7281502

Cited by 9 publications

(10 citation statements)

References 26 publications

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“…Further composite topologies for universal active filters are presented in order to demonstrate how generic designs for filter networks can be obtained. The presented approach can also be used for designs considering to reduce the number of sensors, providing results that are similar to the sensorless proposals described in [9, 10, 28], and exhibiting a quite good compromise between costs and robustness.…”

Section: Introductionsupporting

confidence: 54%

“…Using a voltage source converter, this impedance is related to the energy converted from the CA bus to the DC bus. The impedance matching in [10] is not trivially applied to active filters [9, 28], where the emulated impedance operates as a model imposition for the load and does not represent only the converted energy, but indeed is related to the load. The imposed linear behaviour of the impedance model, in addition to enabling the energy flow control, has a natural capability to reject non‐linear distortions.…”

Section: Voltage–current Shaping Control Generalisationmentioning

confidence: 99%

“…As an alternative, the compensators in a synchronous reference frame can be converted into a stationary frame, which results in resonant compensators [23–26]. However, there is a clear necessity for frequency adaptation in these compensators, since the design is conceived for the nominal grid frequency [1, 25–27], whereas solutions for adaptive resonant schemes are presented in [25–27], quasi‐resonant compensators are proposed in [9, 10, 28] for providing robustness against grid frequency variations by adjusting the selectivity. In [1], a solution was proposed using adaptive quasi‐resonant compensators to further improve the performance of selective harmonic mitigation.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, in [10] a design with quasi‐resonant compensators was presented. In active power filters, the application of current‐shaping control was presented in [9, 28, 40].…”

Section: Introductionmentioning

confidence: 99%

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Shaping control strategies for active power filters

Ketzer

Jacobina

Lima

2018

IET Power Electronics

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This study presents a general control strategy for active power filters derived from the current-shaping principle previously employed in shunt active filters. The generalisation introduced here and denoted as voltage-current shaping control, exploits the symmetry between the possible wave-shaping solutions, and can be applied to shunt, series, and more complex networks of active filters. Moreover, the proposed generalisation allows the synthesis of specific control schemes with a reduced number of sensors. The relevant properties of the proposed schemes in the application of harmonic mitigation are determined. Further, a discussion of the integration of multiple quasi-resonant schemes is presented. Using this approach, it is possible to fine-tune the mitigation of specific components in the harmonic profile from the voltages or currents in the circuit. Experimental results obtained from using a 1 kVA prototype are presented to support the proposed generalisation.

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Section: Introductionsupporting

confidence: 54%

Section: Voltage–current Shaping Control Generalisationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In addition, in [10] a design with quasi‐resonant compensators was presented. In active power filters, the application of current‐shaping control was presented in [9, 28, 40].…”

Section: Introductionmentioning

confidence: 99%

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Shaping control strategies for active power filters

Ketzer

Jacobina

Lima

2018

IET Power Electronics

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“…When the PWM rectifier technology is applied to back to back converter, photovoltaic grid connected inverter, power active filter, and so on, the power factor of system can be improved greatly, and the harmonic and reactive pollution to the grid can be effectively reduced [1,3,4]. And then, it has a broad application prospects in modern power system and equipment [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Direct Power Control Strategy of PWM Rectifier Based on Improved Virtual Flux-Linkage Observer

2017

Journal of Control Science and Engineering

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In order to achieve the low cost and high performance control of three-phase PWM rectifier, a direct power control (DPC) strategy based on a new-style virtual flux-linkage observer is proposed. The model of three-phase PWM rectifier and the principle of virtual flux-linkage vector control are introduced firstly. Then, in order to avoid the effect of integral initial value and cumulative deviation, three first-order low-pass filters are cascaded to replace the pure integral link; an improved virtual flux-linkage observer of threephase power grid is presented. From the observed virtual flux-linkage, the voltage and instantaneous power of three-phase power grid are online estimated. On this basis, the power grid voltage sensorless direct power control system of three-phase PWM rectifier is designed. Simulation results have shown that, both in the rectifying state and in the inverting state, the power grid side current and the DC side voltage of three-phase PWM rectifier all can be effectively controlled; the high power factor operation of three-phase PWM rectifier is realized.

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