Adaptive Vectorial Filter for Grid Synchronization of Power Converters Under Unbalanced and/or Distorted Grid Conditions

Vázquez, Sergio; Sánchez, Juan Antonio Pastor; Reyes, Manuel R.; Leon, Jose I.; Carrasco, J.M.

doi:10.1109/tie.2013.2258302

Cited by 137 publications

(57 citation statements)

References 30 publications

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“…Voltages v α and v β are then decomposed into symmetric components using a sequence extractor. Many sequence extractors can be found in the literature to extract voltage sag information - [29]. In addition, a dc-link voltage regulator is in charge of the active power reference P to keep power balance.…”

Section: B Control Under Grid Faultsmentioning

confidence: 99%

Active and Reactive Power Strategies With Peak Current Limitation for Distributed Generation Inverters During Unbalanced Grid Faults

Camacho

Castilla

Miret

et al. 2015

IEEE Trans. Ind. Electron.

264

197

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Abstract-Distributed generation inverters have become a key element to improve grid efficiency and reliability, especially during grid faults. Under these severe perturbations, inverterbased power sources should accomplish low-voltage ride-through requirements in order to keep feeding the grid and support the grid voltage. Also, rated current can be required to better utilize reactive power provisions. This paper presents a reference generator capable to accomplish these two objectives: to keep the injected currents within safety values, and to compute the power references for a better utilization of the inverter power capacity. The reference generator is fully flexible since positive and negative active and reactive powers can be simultaneously injected to improve ride-through services. Selected experimental results are reported to evaluate the performance of the proposed reference generator under different control strategies.

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Section: B Control Under Grid Faultsmentioning

confidence: 99%

Active and Reactive Power Strategies With Peak Current Limitation for Distributed Generation Inverters During Unbalanced Grid Faults

Camacho

Castilla

Miret

et al. 2015

IEEE Trans. Ind. Electron.

264

197

View full text Add to dashboard Cite

show abstract

“…1b). The value of the signal frequency f1 is used, e.g., in under/over frequency protection algorithms or in resonant controllers to shape the appropriate response characteristics [23]. The value of the signal amplitude A1 is used e.g., in under/over voltage protection algorithms [24].…”

Section: The Continuous Tracking System With Low Delaymentioning

confidence: 99%

Influence of A/D Quantization in an Interpolated DFT Based System of Power Control with A Small Delay

Borkowski

Kania

Mroczka

2014

Metrology and Measurement Systems

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Fast and accurate grid signal frequency estimation is a very important issue in the control of renewable energy systems. Important factors that influence the estimation accuracy include the A/D converter parameters in the inverter control system. This paper presents the influence of the number of A/D converter bits b, the phase shift of the grid signal relative to the time window, the width of the time window relative to the grid signal period (expressed as a cycle in range (CiR) .

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“…However, as stated in [19], the applied method is robust to small-frequency variations so that a high-performance output can be achieved even under a distorted grid voltage [14]. Although according to the allowable limits of frequency-deviation of main-grid [20], a phase-locked loop (PLL) can be avoided in the gridconnected mode [14], [19], for adapting to larger-frequency changes, a PLL or a frequency adaption loop can be added to the applied filter [19], [21].…”

Section: System Description and Modellingmentioning

confidence: 99%

Sliding Mode Control of a Grid-Connected Distributed Generation Unit under Unbalanced Voltage Conditions

Rezaei

Soltani

2016

Automatika

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Original scientific paperThe increasing presence of inverter-based distributed generation (DG) units in distribution networks (DNs) requires control methods that achieve high performance not only during normal operating conditions, but also under unbalanced conditions. With a high probability, a type of voltage unbalance in DNs is unequal three-phase voltage magnitudes at the fundamental system frequency. This can occur temporarily due to faults or permanently due to uneven distribution of unbalanced loads, on the three-phases of the DN. This paper proposes a sliding mode (SM) based controller for grid-connected DG units, under unbalanced grid voltage condition. The proposed control strategy employs a nonlinear control scheme to directly cancel out the negative-sequence (NS) components of DG output current under unbalanced voltage condition; and directly regulate the positive-sequence (PS) active and reactive power injected by DG units to main-grid. The control method proposed in this paper is shown to be robust and stable system parameter uncertainties. The validity and effectiveness of the proposed controller is verified by using time-domain simulation studies, under the MATLAB/Simulink software environment.Key words: Distributed generation, voltage source converter, sliding mode control, unbalanced voltage Upravljanje proizvodnom jedinicom spojenom na mrežu tijekom nesimetričnih napona na mreži temeljeno na kliznom režimu. Povećanje udjela distribuiranih proizvodnih jedinica povezanih na mrežu frekvencijskim pretvaračima zahtjeva metode upravljanja koje dobro djeluju tijekom normalnih uvjeta na mreži kao i u nesimetričnim uvjetima. Najčešći tip nesimetričnog napona na distribuiranoj jedinici je nesimetrična amplituda trofaznog napona na fundamentalnoj frekvenciji. To se doga a privremeno zbog kvarova ili trajno zbog nejednake distribucije nesimetričnih tereta na tri faze distribuirane proizvodne jedinice. U ovom radu predlaže se regulator temeljen na kliznom režimu za upravljanje proizvodnom jedinicom spojenom na mrežu tijekom nesimetričnih napona na mreži. Predložena strategija upravljanja koristi nelinearnu shemu upravljanja kako bi se izravno poništile inverzne komponente izlazne struje tijekom nesimetričnih uvjeta; i izravno upravlja direktnom komponentom radne i jalove snage isporučene u mrežu. Metoda upravljanja predložena u ovom radu pokazala se kao robusna i stabilna uz nesigurne parametre sustava. Opravdanost i učinkovitost predloženog regulatora provjerena je korištenjem simulacija u MATLAB/Simulinku.Ključne riječi: distribuirana proizvodnja, mrežni pretvarač, klizni režim upravljanja, nesimetrični napon

show abstract

Adaptive Vectorial Filter for Grid Synchronization of Power Converters Under Unbalanced and/or Distorted Grid Conditions

Cited by 137 publications

References 30 publications

Active and Reactive Power Strategies With Peak Current Limitation for Distributed Generation Inverters During Unbalanced Grid Faults

Active and Reactive Power Strategies With Peak Current Limitation for Distributed Generation Inverters During Unbalanced Grid Faults

Influence of A/D Quantization in an Interpolated DFT Based System of Power Control with A Small Delay

Sliding Mode Control of a Grid-Connected Distributed Generation Unit under Unbalanced Voltage Conditions

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