Control Strategy of Three-Phase Photovoltaic Inverter under Low-Voltage Ride-Through Condition

Wang, Xian-Bo; Yang, Zhixin; Fan, Bo; Xu, Wei

doi:10.1155/2015/790584

Cited by 25 publications

(24 citation statements)

References 23 publications

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“…This study uses Spanish grid code guidelines [26,69] in developing the FRT/LVRT secondary control. These documents released by the government stipulates that grid-connected DGs should ride-through at least 0.2 pu grid voltage drop lasting for 500 milliseconds.…”

Section: Secondary Voltage Controlmentioning

confidence: 99%

“…Supporting PQ schemes-such as static synchronous compensators (STATCOMs), unified power quality conditioner (UPQCs), and dynamic voltage restorers (DVRs)-have played tremendous roles in FRT capability enhancement of the of DER systems [28][29][30]. Similarly, several innovative FRT control strategies and schemes have been proposed in [26,31,32]. Zamani et al [33] recommend a scheme for the control of an inverter interfaced RES for performance enhancement of the host grid during disturbances and faults.…”

Section: Introductionmentioning

confidence: 99%

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Fault Ride-Through Enhancement of Grid Supporting Inverter-Based Microgrid Using Delayed Signal Cancellation Algorithm Secondary Control

2019

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The growing level of grid-connected renewable energy sources in the form of microgrids has made it highly imperative for grid-connected microgrids to contribute to the overall system stability. Consequently, secondary services which include the fault ride-through (FRT) capability are expected to be possessed characteristics by inverter-based microgrids. This enhances the stable operation of the main grid and sustained microgrid grid interconnection during grid faults in conformity with the emerging national grid codes. This paper proposes an effective FRT secondary control strategy to coordinate power injection during balanced and unbalanced fault conditions. This complements the primary control to form a two-layer hierarchical control structure in the microgrids. The primary level is comprised of voltage/power and current inner loops fed by a droop control. The droop control coordinates grid power-sharing amongst the voltage source inverters. When a fault occurs, the participating inverters operate to support the grid voltage, by injecting supplementary reactive power based on their droop gains. Similarly, under unbalanced voltage condition due to asymmetrical faults in the grid, the proposed secondary control ensures the positive sequence component compensation and negative and zero sequence components clearance using a delayed signal cancellation (DSC) algorithm and power electronic switched series impedance placed in-between the point of common coupling (PCC) and the main grid. While ensuring that FRT ancillary service is rendered to the main utility, the strategy proposed ensures relatively interrupted quality power is supplied to the microgrid load. Consequently, this strategy ensures the microgrid ride-through the voltage sag and supports the grid utility voltage during the period of the main utility grid fault. Results of the study are presented and discussed.

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Section: Secondary Voltage Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fault Ride-Through Enhancement of Grid Supporting Inverter-Based Microgrid Using Delayed Signal Cancellation Algorithm Secondary Control

2019

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“…The proposed scheme contains a three-phase three level inverter and a DC-DC 1527 converter on the basis of current-source full-bridge power converter with an embedded high-frequency transformer and rectifier. In [23], an improved PR-based LVRT control scheme for a PV system under unbalanced grid voltages is proposed. The PR controller has the ability to regulate the PV system output variables based on symmetrical components of three-phase grid voltage.…”

Section: Lvrt Control Strategies For 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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“…The performance of the proposed strategy is compared with the conventional PI and proportional plus resonant (PR) controllers that are commonly employed in LVRT control of DG systems. 5,11,20,37,38 For the comparison model, a PI controller is used in the DC voltage loop, and a PR controller is used in the phase current loop, referred to hereon as the PI + PR control scheme. Gains for the PI controller are tuned by pole placement and those for the PR controller by trial-and-error to obtain the best performance.…”

Section: Performance Comparisonmentioning

confidence: 99%

A novel low-voltage ride-through capable energy management scheme for a grid-connected hybrid photovoltaic-fuel cell power source

Sabir

2018

Int Trans Electr Energ Syst

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Summary A novel low‐voltage ride‐through capable energy management control system is proposed for a grid‐connected hybrid photovoltaic‐fuel cell power source. The scheme is designed to enable the hybrid power source to follow a power demand from the grid operator. Additionally, the system is able to ride through both symmetrical and asymmetrical voltage sags while providing active and reactive power support to the grid. The injected active power is kept constant during asymmetrical voltage sags without requiring a phase locked loop or positive‐negative sequence extraction, thus lowering the computational complexity and design requirements of the control system. Several test cases are simulated using the SimPowerSystems toolbox of MATLAB/Simulink computing environment to demonstrate effectiveness of the proposed strategy both under normal and voltage sag conditions. Results of the control algorithm's digital implementation on a low‐cost microcontroller are also presented.

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Control Strategy of Three-Phase Photovoltaic Inverter under Low-Voltage Ride-Through Condition

Cited by 25 publications

References 23 publications

Fault Ride-Through Enhancement of Grid Supporting Inverter-Based Microgrid Using Delayed Signal Cancellation Algorithm Secondary Control

Fault Ride-Through Enhancement of Grid Supporting Inverter-Based Microgrid Using Delayed Signal Cancellation Algorithm Secondary Control

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

A novel low-voltage ride-through capable energy management scheme for a grid-connected hybrid photovoltaic-fuel cell power source

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