A review of low voltage ride-through techniques for photovoltaic generation systems

Tian, Hao; Gao, Feng; Ma, Cong; He, Guoqing; Li, Guanghui

doi:10.1109/ecce.2014.6953605

Cited by 15 publications

(6 citation statements)

References 38 publications

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“…Power balance control, or DC-link voltage control, is often integrated into the above control strategies and aims to maintain power balance and stable DC-link voltage [84]. As described above, the contradiction between grid current quality and DC-link voltage oscillation cannot be solved simultaneously under unbalanced voltage fault.…”

Section: ) Current Control and Power Balancementioning

confidence: 99%

Review of Power System Support Functions for Inverter-Based Distributed Energy Resources- Standards, Control Algorithms, and Trends

Xue

Chang

2021

IEEE Open J. Power Electron.

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Penetration of renewable energy in power systems has been increasing in the past decades in response to increased global electricity demand and concerns for the environment. Distributed energy resources (DERs) based on renewables have experienced rapid growth thanks to the incentive programs and broad-based participation. With the growing prevalence of DERs, the risk of grid instability and vulnerability increases due to the intermittent nature of renewable energy. At the same time, the voltage and frequency deviation problems emerge more often when the reverse power flow occurs under supply-demand imbalance in distributed power systems. Standards and grid codes have been issued for DER inverters to interconnect with the distribution grid. The updated standard and grid codes expect DERs to provide a variety of power system support functions in order to incorporate higher DER penetration and to maximize DER value to the grid. This paper provides an overview of the power system support functions from renewable DER inverters, which are categorized as: voltage regulation by active/reactive power control, frequency regulation by active power control, voltage ride-through, and frequency ride-through. The benefits and drawbacks of each algorithm are presented and compared with its predecessor, manifesting the logic in the evolution of the algorithms.

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Section: ) Current Control and Power Balancementioning

confidence: 99%

Review of Power System Support Functions for Inverter-Based Distributed Energy Resources- Standards, Control Algorithms, and Trends

Xue

Chang

2021

IEEE Open J. Power Electron.

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“…Even though LVRT regulation issues for wind farms is a welldeveloped research topic, for PV inverters, it is not as well established as other distributed generations like doubly-fed wind turbine generator system. Moreover, the specific requirements and standards of LVRT regulation issues vary from country to country [17]. The LVRT limiting curves defined by different countries is depicted in Figure 2.…”

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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“…During recent years, several review articles have shone a light on the LVRT capability of GCPV systems [16], [18], [21], [31] - [49]. However, none of the articles have provided a detailed classification and critically reviewed the recently developed modified inverter control techniques for the LVRT capability of PV systems.…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Review of Control Strategies to Overcome Challenges During LVRT in PV Systems

Joshi¹,

Swami

Jately

et al. 2021

IEEE Access

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Due to the high penetration of grid-connected photovoltaic (GCPV) systems, the network operators are regularly updating the grid codes to ensure that the operation of GCPV systems will assist in maintaining grid stability. Among these, low-voltage-ride-through (LVRT) is an important attribute of PV inverters that allows them to remain connected with the grid during short-term disturbances in the grid voltage. Hence, PV inverters are equipped with control strategies that secure their smooth operation through this ride-through period as per the specified grid code. During the injection of reactive power under LVRT condition, various challenges have been observed, such as inverter overcurrent, unbalance phase voltages at the point of common coupling (PCC), overvoltage in healthy phases, oscillations in active, reactive power and dc-link voltage, distortion in injected currents and poor dynamic response of the system. Several strategies are found in the literature to overcome these challenges associated with LVRT. This paper provides a critical review on the recent challenges and the associated strategies under LVRT conditions in GCPV inverters. The drawbacks associated with the conventional current control strategies are investigated in MATLAB/Simulink environment and each category of the advanced LVRT control strategy is analyzed under different types of grid faults. Moreover, this work categorizes different state-of-the-art LVRT techniques on the basis of synchronization methods, current injection techniques and dc-link voltage control strategies. It is found that the state-of-the-art control strategies like OVSS/OCCIDGS provides improved voltage support and current limitation which results in smooth LVRT operation by injecting currents of enhanced power quality.

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A review of low voltage ride-through techniques for photovoltaic generation systems

Cited by 15 publications

References 38 publications

Review of Power System Support Functions for Inverter-Based Distributed Energy Resources- Standards, Control Algorithms, and Trends

Review of Power System Support Functions for Inverter-Based Distributed Energy Resources- Standards, Control Algorithms, and Trends

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

A Comprehensive Review of Control Strategies to Overcome Challenges During LVRT in PV Systems

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