Fault Ride-Through Capability of Voltage-Controlled Inverters

Piya, Prasanna; Ebrahimi, Mohammad; Karimi-Ghartemani, Masoud; Khajehoddin, S. Ali

doi:10.1109/tie.2018.2803765

Cited by 132 publications

(75 citation statements)

References 33 publications

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“…since v + q is always zero from Equation (1) while p, q are oscillation terms with zero average value [5,6,9]. The VUF can be defined now at the PCC as…”

Section: Dynamic Modeling In the Srf Using Dsc Methodsmentioning

confidence: 99%

“…When sudden grid voltage drops occur, the raised overcurrents may harm the DERs or lead to instant tripping of the inverters. However, the tripping scenario is against the recent fault-ridethrough (FRT) requirement that demands from the DERs to support the faulty grids [5][6][7][8]. Hence, current-limiting techniques should be embedded in the control design of every inverter-interfaced DER to allow maximum power injection and avoid undesired tripping [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…The way current limitation is achieved under unbalanced grid conditions still represents a challenging task, especially when droop controlled inverters are considered, since their task is to regulate the grid voltage and frequency. The authors in [6,21] have implemented controllers that ensure a balanced current provision under voltage sags. As explained in [6], this enhances the fault-ride-through capability in terms of injecting only positive sequence powers/current that comply with the FRT requirement, while current limitation at the steady-state is achieved through the controller reference powers.…”

Section: Introductionmentioning

confidence: 99%

“…The authors in [6,21] have implemented controllers that ensure a balanced current provision under voltage sags. As explained in [6], this enhances the fault-ride-through capability in terms of injecting only positive sequence powers/current that comply with the FRT requirement, while current limitation at the steady-state is achieved through the controller reference powers. However these approaches do not deal with negative sequence voltage mitigation.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Voltage Support under Grid Faults with Inherent Current Limitation for Three-Phase Droop-Controlled Inverters

Paspatis

Konstantopoulos

2019

Energies

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A novel nonlinear current-limiting controller for three-phase grid-tied droop-controlled inverters that is capable of offering voltage support during balanced and unbalanced grid voltage drops is proposed in this paper. The proposed controller introduces a unified structure under both normal and abnormal grid conditions operating as a droop controller or following the recent fault-ride-through requirement to provide voltage support. In the case of unbalanced faults, the inverter can further inject or absorb the required negative sequence real and reactive power to eliminate the negative sequence voltage at the point of common coupling (PCC) whilst ensuring at all times boundedness for the grid current. To accomplish this task, a novel and easily implementable method for dividing the available current into the two sequences (positive and negative) is proposed, suitably adapting the proposed controller parameters. Furthermore, nonlinear input-to-state stability theory is used to guarantee that the total grid current remains limited below its given maximum value under both normal and abnormal grid conditions. Asymptotic stability for any equilibrium point of the closed-loop system in the bounded operating range is also analytically proven for first time using interconnected-systems stability analysis irrespective of the system parameters. The proposed control concept is verified using an OPAL-RT real-time digital simulation system for a three-phase inverter connected to the grid.

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“…since v + q is always zero from Equation (1) while p, q are oscillation terms with zero average value [5,6,9]. The VUF can be defined now at the PCC as…”

Section: Dynamic Modeling In the Srf Using Dsc Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Voltage Support under Grid Faults with Inherent Current Limitation for Three-Phase Droop-Controlled Inverters

Paspatis

Konstantopoulos

2019

Energies

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“…Additionally, according to 125 Figure 2, the stator and the rotor voltage can be written as: On the one hand, the wind turbines integration into the grid places the ability of power control, which implies that wind turbines need an output-adjusting power to contribute to the dispatch balance (production/consumption) [4,5]. On the other hand, low-voltage ride through (LVRT) and reactive power injection from the DFIG system are important for grid codes [12][13][14][15]. Thereby, the grid-connected wind turbine controllability according to grid compatibility has a great impact on future development [16,17].…”

Section: Introductionmentioning

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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Three‐Phase DERs

2022

Modeling and Control of Modern Electrical Energy Systems

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Fault Ride-Through Capability of Voltage-Controlled Inverters

Cited by 132 publications

References 33 publications

Voltage Support under Grid Faults with Inherent Current Limitation for Three-Phase Droop-Controlled Inverters

Voltage Support under Grid Faults with Inherent Current Limitation for Three-Phase Droop-Controlled Inverters

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

Three‐Phase DERs

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