Virtual Flux Sensorless Control for Shunt Active Power Filters with Quasi-resonant Compensators

Ketzer, Marcos B.; Jacobina, Cursino B.

doi:10.1109/tpel.2015.2487298

Cited by 44 publications

(39 citation statements)

References 43 publications

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“…Besides obvious benefits of sensors reduction, there are several other additional advantages like [4], [8], [11], [13], [14]; elimination of noise, resolution limitations, offset and various disturbances related to sensors, and decrease of hardware complexity. ACline current sensors and DC-link voltage sensor are essential for proper operation of the control system since the AC-line currents and DC-link voltage are the controlled quantities [9]. In addition, these sensors are employed for overcurrent and overvoltage protections [4], [9].…”

Section: Introductionmentioning

confidence: 99%

“…ACline current sensors and DC-link voltage sensor are essential for proper operation of the control system since the AC-line currents and DC-link voltage are the controlled quantities [9]. In addition, these sensors are employed for overcurrent and overvoltage protections [4], [9]. On the other hand, grid voltage sensors are mainly used for synchronization purposes.…”

Section: Introductionmentioning

confidence: 99%

“…Despite its simplicity, the AC-line currents derivative is required. Since this solution presents high noise sensitivity, other methods have been developed using virtual flux (VF) concept [9], [10], [16]- [21], Kalman filters [22], [23], disturbance observers [14], [24], hybrid parallel observers [25] and Luenberger observers [26]. Adaptive fullorder observers [12], [27] have been also proposed for grid voltage sensorless control.…”

Section: Introductionmentioning

confidence: 99%

“…Others are sensitive to load variation [4], need initialization [7] and present instability under grid voltages sag [8] which deteriorate their robustness. The VF estimation through open loop integrators has limitations related to stability [9]. The observers based approaches presented difficulty of tuning and high computational burden.…”

Section: Introductionmentioning

confidence: 99%

“…The authors in [29] have presented only real time simulation results; therefore, the proposal has not been experimentally validated. Furthermore, several strategies have not been tested for unbalanced or distorted grid voltages [6]- [9], [11], [13]- [15], [19]- [22], [24]- [26], [29]. On the other hand, complexity and high computational burden are the major drawbacks of the strategies tested under non-ideal conditions.…”

Section: Introductionmentioning

confidence: 99%

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Grid Voltages Estimation for Three-Phase PWM Rectifiers Control Without AC Voltage Sensors

Rahoui

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Seddiki

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Grid Voltages Estimation for Three-Phase PWM Rectifiers Control Without AC Voltage Sensors

Rahoui

Bechouche

Seddiki

et al. 2018

IEEE Trans. Power Electron.

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Coordinated power control without AC voltage sensing and active power filtering using interlinking converter with reduced interlinking power flow in a droop controlled islanded hybrid AC‐DC microgrid

Shravan

Vyjayanthi

2021

Int Trans Electr Energ Syst

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Summary An interlinking converter (IC) in a hybrid AC‐DC microgrid (HMG) is the power transfer medium between the AC and DC subgrids. This article proposes a modified control strategy of IC for carrying out the power transfer between the subgrids without sensing the AC voltages. This control strategy directly extracts the AC voltages from the gate signals used for controlling the IC. The omission of AC voltage sensing process upgrades the reliability of the system and also minimizes the size and cost of the system considerably. The paper also studies the operation of IC as an active power filter (APF) under non‐linear loading conditions, with the objective of reducing the interlinking power flow. APF using IC while carrying out power transfer between the subgrids generate high power losses. This issue is addressed by controlling the IC using the power request method, thereby ensuring a reduced power flow through the IC. In this article, the results obtained from the simulation of the HMG in MATLAB/Simulink are presented to verify effectiveness of the proposed control strategy. The results of real‐time simulations performed using OPAL‐RT (OP4500) real‐time simulator test bed are also presented to validate the potency of the proposed control strategy.

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Control strategy without phase‐locked loop based on power estimation and natural frame for single‐phase cascaded H‐bridge converter

Zhang

Chen

Yang

et al. 2022

Circuit Theory & Apps

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Based on a single-phase cascaded H-bridge (CHB) multilevel converter, this paper investigates a control strategy combining power estimation and natural frame control (NFC) with the omission of grid voltage sensors. Besides, this control method, without phase-locked loop (PLL), can meet the continuous operation of the system and also eliminates grid voltage feedforward. First, natural frame control is introduced to derive the implementation process of control strategy without PLL, and the calculation formula of AC reference currents is given. Furthermore, the separate control of active and reactive currents is achieved. Second, the principle of proposed control algorithm is presented, and the sinusoidal voltage unit vector for synchronization can be accurately estimated. Next, considering the errors, the article corrects the method through parameter compensation. In addition, the balanced control method stabilized the DC side voltage of the converter. Finally, the effectiveness of this method is verified by computer simulation and experimental prototype.cascaded H-bridge (CHB), natural frame control (NFC), grid voltage sensors, phase-locked loop (PLL), power estimation

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Virtual Flux Sensorless Control for Shunt Active Power Filters with Quasi-resonant Compensators

Cited by 44 publications

References 43 publications

Grid Voltages Estimation for Three-Phase PWM Rectifiers Control Without AC Voltage Sensors

Grid Voltages Estimation for Three-Phase PWM Rectifiers Control Without AC Voltage Sensors

Coordinated power control without AC voltage sensing and active power filtering using interlinking converter with reduced interlinking power flow in a droop controlled islanded hybrid AC‐DC microgrid

Control strategy without phase‐locked loop based on power estimation and natural frame for single‐phase cascaded H‐bridge converter

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