A Low-Voltage Ride-Through Technique for Grid-Connected Converters of Distributed Energy Resources

Lee, Chia-Tse; Hsu, Che-Wei; Cheng, Po-Tai

doi:10.1109/tia.2011.2155016

Cited by 221 publications

(146 citation statements)

References 23 publications

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“…Since the fault is unbalanced, the THD of the three-phase currents are slightly increased; however remains lower than 5%. As reported in simulations and experiments, the active power and dc-link voltage remain almost constant, which is a major advantage over the control methods presented in [4,8,11,19]. Furthermore, a very efficient current limitation method is employed, which can be easily implemented in hardware compared to the methods presented in [3,4,12,19,31].…”

Section: Resultsmentioning

confidence: 88%

“…In (9), there are four terms in the apparent power formulation. In (12) to (19), these terms are written as active and reactive components Pn and Qn, where n varies from 1 to 4. Multiplying two terms with the same sequences will lead to a constant term in the active and reactive power, like in (12), (13), (18), and (19).…”

Section: System Operationmentioning

confidence: 99%

“…In (12) to (19), these terms are written as active and reactive components Pn and Qn, where n varies from 1 to 4. Multiplying two terms with the same sequences will lead to a constant term in the active and reactive power, like in (12), (13), (18), and (19). In contrast, the oscillating parts of the active and reactive power are caused by the multiplication of two terms with inverse sequences, like in (14)- (17).…”

Section: System Operationmentioning

confidence: 99%

“…In [10,18], an Instantaneous Active Reactive Control (IARC) was proposed, which leads to non-sinusoidal output currents under unbalanced faults. A current reference generation method dealing with both PS and NS aiming at reducing the NS of the grid voltage has been proposed in [19]. However, the active and reactive power waveforms include oscillatory components under unbalanced grid faults.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Control Strategy for Three-Phase Grid-Connected PV Inverters Enabling Current Limitation Under Unbalanced Faults

Afshari

Moradi

Rahimi

et al. 2017

IEEE Trans. Ind. Electron.

209

148

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Abstract-Power quality and voltage control are among the most important aspects of the grid-connected power converter operation under faults. Non-sinusoidal current may be injected during unbalanced voltage sag and active or/and reactive power may include double frequency content. This paper introduces a novel control strategy to mitigate the double grid frequency oscillations in the active power and dc-link voltage of the two-stage three-phase grid-connected Photovoltaic (PV) inverters during unbalanced faults. With the proposed control method, PV inverter injects sinusoidal currents under unbalanced grid faults. In addition, an efficient and easy-to-implement current limitation method is introduced, which can effectively limit the injected currents to the rated value during faults. In this case, the fault-ride-through operation is ensured and it will not trigger the overcurrent protection. A Non-MPPT operation mode is proposed for the dc-dc converter. The mode is enabled under severe faults, when the converter cannot handle the maximum PV power. Finally experimental validation is provided by implementing method in an experimental setup including a 2kW PV inverter.

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Section: Resultsmentioning

confidence: 88%

Section: System Operationmentioning

confidence: 99%

Section: System Operationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Control Strategy for Three-Phase Grid-Connected PV Inverters Enabling Current Limitation Under Unbalanced Faults

Afshari

Moradi

Rahimi

et al. 2017

IEEE Trans. Ind. Electron.

209

148

View full text Add to dashboard Cite

show abstract

“…Therefore, the full converter capability might be reached by calculating the phase current magnitudes expressed by (7) to (9) under a variable substitution of x by i and α = φ 2 − φ 1 [32]. The saturation gets active when (7) to ( to an equal and linear scaling for the dq-components in both sequences by…”

Section: Maximum Phase Currentmentioning

confidence: 99%

Handling of unbalanced faults in HVDC-connected wind power plants

Schönleber

Prieto‐Araujo

Ratés-Palau

et al. 2017

Electric Power Systems Research

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Comprehensive review on low voltage ride through capability of wind turbine generators

Hiremath

Moger

2020

Int Trans Electr Energ Syst

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Wind energy has made more inroads in renewable power generation due to environmental impact of conventional energy sources. The high penetration of grid connected wind energy has emerged as a recent trend in many countries. On the other hand, the problem of power generation loss due to the grid fault also arisen. The recent technological advancement suggests the importance of low voltage ride through (LVRT) in wind energy conversion system (WECS). However, LVRT is a technique in making uninterrupted connectivity of WECS in the presence of grid fault. This paper presents the state of the art of LVRT capabilities of various wind turbine generators using FACTS devices and different converter controllers. Also, the main challenging issues and different approaching strategies in LVRT are addressed. Finally, extracting all important features from distinct papers, new dimension of LVRT is presented for the power quality and power generation loss problems.

show abstract

A Low-Voltage Ride-Through Technique for Grid-Connected Converters of Distributed Energy Resources

Cited by 221 publications

References 23 publications

Control Strategy for Three-Phase Grid-Connected PV Inverters Enabling Current Limitation Under Unbalanced Faults

Control Strategy for Three-Phase Grid-Connected PV Inverters Enabling Current Limitation Under Unbalanced Faults

Handling of unbalanced faults in HVDC-connected wind power plants

Comprehensive review on low voltage ride through capability of wind turbine generators

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