Strategy to enhance the low-voltage ride-through in photovoltaic system during multi-mode transition

Jaalam, Norazila; Rahim, N.A.; Bakar, Ab Halim Abu; Eid, Bilal M.

doi:10.1016/j.solener.2017.05.073

Cited by 24 publications

(21 citation statements)

References 41 publications

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“…Under abnormal conditions, the inverter must be disconnected from the power grid as the voltage and current exceed their limits. Generally, for continuous operation of the PV systems under abnormal conditions, the voltage should not be more than 1.10 p.u and less than 0.85 p.u [14,15]. Under abnormal conditions, reactive power injection can be provided by PV systems for supporting the grid and regulating the amplitude of output voltages.…”

Section: Lvrt In Pv Systemsmentioning

confidence: 99%

Low-voltage ride-through for a three-phase four-leg photovoltaic system using SRFPI control strategy

Kamil¹,

Said²,

Mustafa³

et al. 2019

IJECE

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With the innovative progresses in power electronics in recent years, photovoltaic (PV) systems emerged as one of the promising sources for electricity generation at the distribution network. Nonetheless, connection of PV power plants to the utility grid under abnormal conditions has become a significant issue and novel grid codes should be recommend. The low-voltage ride-through (LVRT) capability is one of the challenges faced by the integration of PV power stations into electrical grid under abnormal conditions. This work firstly provides a discussion on recent control schemes for PV power plants to enhance the LVRT capabilities. Next, a control scheme for a three-phase four-leg grid-connected PV inverter under unbalanced grid fault conditions using synchronous reference frame proportional integral (SRFPI) controller is proposed. Simulation studies are performed to investigate the influence of the control strategy on the PV inverter.

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Section: Lvrt In Pv Systemsmentioning

confidence: 99%

Low-voltage ride-through for a three-phase four-leg photovoltaic system using SRFPI control strategy

Kamil¹,

Said²,

Mustafa³

et al. 2019

IJECE

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“…The work novelty can be observed in the proposed LVRT algorithm presented in Section 3 according to the IEC 61400-21 [41] and the Spanish grid code, generating the P-N SCs of the grid currents with the implementation of the PR regulators on the DFIG's GSC in the αβ components of the 3-phase inverter currents. This feature will have the capability for the compensation of reactive power and the grid current limitation during a grid fault according to the Spanish grid code.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the grid code imposes the 227 necessity to inject some reactive power for specific levels in the depth of the voltage dips [51] and to 228 limit the current amplitude near its nominal value in order to avoid the generator disconnection 229 from the grid. Figure 8a presents the LVRT requirements according to IEC 61400-21 [41]; Figure 8b 230 presents the Spanish grid code requirements for the reactive power during grid faults [49]. for the reactive power [52].…”

mentioning

confidence: 99%

Improved Control of Grid-connected DFIG-based Wind Turbine using Proportional-Resonant Regulators during Unbalanced Grid

Karkri

Rey-Boué

Moussaoui³

et al. 2019

Energies

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The quality of power and current control are the greatest challenges of grid-connected wind farms during abnormal conditions. The negative-and positive-sequence components of the grid currents may be injected into a wind generation system during grid faults, which can affect the power stability and damage the wind system. The proposed work assures a low-voltage ride through capability of doubly-fed induction generator-based wind turbines under the grid voltage sag. A new technique to protect the wind system and to recompense the reactive power during failures of the utility grid according to the Spanish grid code is proposed. The control design is implemented to the power converters, and the grid current regulation is developed by using proportional-resonant regulators in a stationary two-phase (αβ) reference frame. The control performance is significantly validated by applying the real-time simulation for the rotor-side converter and the hardware in the loop simulation technique for the experiment of the generator's grid-side converter control.

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“…Because of the rapid rising of single-phase grid-connected PV systems, this feature is extended in DG units installed in the low-voltage networks. In [19][20][21][22][23], some investigations on the single-phase gridconnected PV systems have been presented in order to prove that the LVRT capability can be achieved. These papers studied various aspects of LVRT control strategies which include sequence separation techniques, phase locked loop (PLL), current controller, and control approaches.…”

Section: Introductionmentioning

confidence: 99%

Fault Ride-Through Capability Enhancement for Microinverter Applications

Ansari

Mizani

Ashouri

et al. 2019

Journal of Renewable Energy

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Due to the fast growth of single-phase grid-connected photovoltaic (PV) systems, the existing grid codes are expected to be modified to guarantee the availability, quality, and reliability of the electrical system. Therefore, the future single-phase PV systems should become smarter and support low voltage ride-through (LVRT) capability, which are required for three-phase wind power systems. In this paper, the operation principle of a flyback inverter in a low-voltage ride-through operation is demonstrated in order to map future challenges. The steady state performance of the flyback inverter under voltage rise and drop conditions at boundary conduction mode (BCM) and discontinues conduction mode (DCM) is studied theoretically. The simulation results of the flyback inverter for various grid faults are presented to verify the theoretical analyses. The results indicate the fact that the flyback inverter at BCM condition can provide LVRT capability for photovoltaic microinverter applications in distributed generation (DG) systems, even though it does not need any auxiliary control branches and any limitations in components design.

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Strategy to enhance the low-voltage ride-through in photovoltaic system during multi-mode transition

Cited by 24 publications

References 41 publications

Low-voltage ride-through for a three-phase four-leg photovoltaic system using SRFPI control strategy

Low-voltage ride-through for a three-phase four-leg photovoltaic system using SRFPI control strategy

Improved Control of Grid-connected DFIG-based Wind Turbine using Proportional-Resonant Regulators during Unbalanced Grid

Fault Ride-Through Capability Enhancement for Microinverter Applications

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