LVRT Enhancement of a Grid-tied PMSG-based Wind Farm using Static VAR Compensator

Dayo, Samuel; Memon, Sahrish; Uqaili, Muhammad Aslam; Memon, Zubair Ahmed

doi:10.48084/etasr.4147

Cited by 17 publications

(5 citation statements)

References 16 publications

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“…And the active current calculation refers to (21). To make the active current smoother and reduce the usage frequency of chopper, the short-term overcurrent capacity of GSC is adopted for current region expansion.…”

Section: Grid-impedance-based Transient Current Controlmentioning

confidence: 99%

“…The software modified method can be further classified into modified converter control [14,15], improved pitch angle control [16], and algorithm-based control [17,18]. On the other hand, the hardware modified method involves the addition of external devices, such as a chopper circuit [19,20], flexible AC transmission system (FACTs) devices [21,22], and energy storage systems [23]. Furthermore, researchers have also explored the combination of software and hardware approaches [24,25].…”

Section: Introductionmentioning

confidence: 99%

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Grid-Impedance-Based Transient Current Control for Offshore Wind Turbines under Low-Voltage Fault

Yang,

Gao,

Cao

et al. 2024

JMSE

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In order to enhance the transient stability of offshore wind turbines (OWTs) in marine energy systems, the grid codes stipulate that OWTs should possess the low-voltage ride-through (LVRT) ability of being grid-tied and injecting reactive current during grid fault. However, the grid-side converter (GSC) of OWTs may lose stability under weak grid or severe fault conditions due to inaccurate current references. To address this issue, a novel transient current control method is proposed to improve the transient stability of permanent-magnet-synchronous-generator (PMSG)-based OWTs. The feature of DC-link overvoltage is investigated and is alleviated by utilizing the GSC’s overcurrent capacity and chopper. Additionally, the equivalent circuit of the PMSG-based OWT connected to the onshore grid is derived based on Thevenin’s theorem. The feasible current region (FCR) is then determined, taking into account the GSC capacity, pre-fault power ability, LVRT requirement, and synchronization stability. Furthermore, a grid-impedance-based transient current control method is designed to enhance the fault ride-through performance and mitigate power oscillation of the OWT under various transient grid impedance and fault conditions. Finally, a simulation model is conducted using PSCAD v4.6.3 software to validate the effectiveness of the proposed method.

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Section: Grid-impedance-based Transient Current Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Grid-Impedance-Based Transient Current Control for Offshore Wind Turbines under Low-Voltage Fault

Yang,

Gao,

Cao

et al. 2024

JMSE

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“…Advanced models are being researched to represent real systems more accurately in the context of SVC modeling for transient analysis [84], [85]. Furthermore, the control system is being improved in ongoing research aimed at enhancing the low voltage ride through (LVRT) capability of wind farms through the use of SVC [86]- [88]. The location and size of SVC has been a persistent challenge since its initial installation.…”

Section: Current Developments and Future Directions In Facts Technologymentioning

confidence: 99%

Advances in FACTS Technology for Transient Stability in Power Systems

Relić,

Glavaš,

Petrović

et al. 2023

Preprint

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This paper investigates the advances in Flexible AC Transmission System (FACTS) technology and its application in enhancing transient stability in power systems. FACTS devices are becoming increasingly popular due to their ability to improve power system performance by controlling power flow, voltage, and stability. Various FACTS technologies are reviewed, including Static Var Compensator (SVC), Static Synchronous Compensator (STATCOM), and Static Synchronous Series Compensator (SSSC), among others. The impact of these technologies on power system stability is examined and a comprehensive analysis of their effectiveness in mitigating transient stability issues is provided. Recommendations for future research in the field of FACTS technology for improving the reliability and stability of power systems are given in the conclusion.

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“…The authors proved that the power control mode is superior to the speed control mode for power quality mitigation. Presently, new varieties of wind turbine employ power electronic devices and the converters control schemes were developed at the generator side and the grid side which helps in mitigating the flicker [16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Flicker Emission in a Grid Connected Wind Farms

Magesh¹,

Devi²,

Lakshmanan

2023

J. Electr. Eng. Technol.

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Wind farms in Tamil Nadu's Coimbatore district have identified several issues, including flickering emissions, frequent generator tripping, and power evacuation issues caused by a weak grid. Taking into consideration the scarcity of research on flickering emissions, this work focuses on the causes of short-term flicker severity (Pst) in wind farms that export generated power to industrial loads. To identify the scenarios that cause flickering, simulation models of Fixed Speed Wind Farm (FSWF) and Variable Speed Wind Farm (VSWF) with controllers were developed using DIgSILENT power factory software. The flicker emissions were measured at the wind farm substations using Fluke and Dranetz PX5.8 power quality analyzers in accordance with the IEC 61400-21 standard. To validate the simulation model, the results from the flickermeter during the simulation and the field measurements were compared. According to the results of this research, both fixed and variable speeds produce flicker emissions that exceed the IEC standard limit, that causes the power electronics-based industrial drives to fail to operate. The controllers were developed to improve the performance of wind farms that will benefit the current and future wind energy-efficient conversion systems (WECS). Keywords FSWF. VSWG. Flickering. Point of Common Coupling. Power Quality Analyzer [40] Abulanwar, Sayed, Abdelhady Ghanem, Mohammad EM Rizk, Weihao Hu. (2019) A proposed flicker mitigation scheme of DFIG in weak distribution networks.

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LVRT Enhancement of a Grid-tied PMSG-based Wind Farm using Static VAR Compensator

Cited by 17 publications

References 16 publications

Grid-Impedance-Based Transient Current Control for Offshore Wind Turbines under Low-Voltage Fault

Grid-Impedance-Based Transient Current Control for Offshore Wind Turbines under Low-Voltage Fault

Advances in FACTS Technology for Transient Stability in Power Systems

Assessment of Flicker Emission in a Grid Connected Wind Farms

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