Mitigation of Voltage Dips and Swells in Grid-connected Wind Energy Conversion Systems

Several advantages make wind-driven permanent magnet synchronous generators (PMSGs) very promising in the wind energy market, especially their fault ride-through capabilities. With the high penetration levels of today, both the grid and wind power (WP) systems are being affected by each other. Due to grid faults, the DC-bus in PMSG systems typically experiences overvoltage, which can negatively affect the generator parameters and trip the system. However, advancements in power electronics, control systems, fault limiters, FACTS, and energy storage technology make it possible to find and design satisfactory solutions and approaches. The most recent FRTC-improving techniques are mainly modified or external techniques based on controllers in PMSG-based WP. This paper evaluates the in-depth schemes of FRTC, introducing the underlying theory and traits of the different approaches to highlight the advantages and drawbacks of each. Five scenarios of DC-link voltage under zero-grid voltage are carried out by using the MATLAB SIMULINK program to assess the FRTC methods. This study shows that external device-based approaches can be efficient, but some of them are expensive, thus updated controller methods are recommended to cut costs. Research findings of this study are expected to support the deployment of FRTC technologies, as well as provide valuable input into WP research on grid integration.

show abstract

“…Although DVR can address voltage sag, it is incapable to handle the deep voltage sag. Terefore, it needs additional units [85,86].…”

Section: Facts Unitsmentioning

confidence: 99%

Evaluation and Comparison of Different Methods for Improving Fault Ride-Through Capability in Grid-Tied Permanent Magnet Synchronous Wind Generators

Mahmoud

Atia²,

Esmail

et al. 2023

International Transactions on Electrical Energy Systems

View full text Add to dashboard Cite

show abstract

“…A voltage sag due to wind generator penetration may result in disconnection, if voltage drops under a certain value. This voltage dip can also result in a high current through IGBT inverter which connects a PMSG to the grid [81]. Fast removal of sag and swell in such cases events is crucial.…”

Section: ) Voltage Sag and Swellmentioning

confidence: 99%

Offshore Wind Farm-Grid Integration: A Review on Infrastructure, Challenges, and Grid Solutions

et al. 2021

View full text Add to dashboard Cite

Recently, the penetration of renewable energy sources (RESs) into electrical power systems is witnessing a large attention due to their inexhaustibility, environmental benefits, storage capabilities, lower maintenance and stronger economy, etc. Among these RESs, offshore wind power plants (OWPP) are ones of the most widespread power plants that have emerged with regard to being competitive with other energy technologies. However, the application of power electronic converters (PECs), offshore transmission lines and large substation transformers result in considerable power quality (PQ) issues in grid connected OWPP. Moreover, due to the installation of filters for each OWPP, some other challenges such as voltage and frequency stability arise. In this regard, various customs power devices along with integration control methodologies have been implemented to deal with stated issues. Furthermore, for a smooth and reliable operation of the system, each country established various grid codes. Although various mitigation schemes and related standards for OWPP are documented separately, a comprehensive review covering these aspects has not yet addressed in the literature. The objective of this study is to compare and relate prior as well as latest developments on PQ and stability challenges and their solutions. Low voltage ride through (LVRT) schemes and associated grid codes prevalent for the interconnection of OWPP based power grid have been deliberated. In addition, various PQ issues and mitigation options such as FACTS based filters, DFIG based adaptive and conventional control algorithms, ESS based methods and LVRT requirements have been summarized and compared. Finally, recommendations and future trends for PQ improvement are highlighted at the end.INDEX TERMS Frequency control, Grid codes, harmonics, LVRT, offshore wind energy, power quality, stability, voltage control.

show abstract

“…The HVRT requirements for the DFIG system can be achieved by using different techniques. The authors in References 40,41 used static series compensator (STATCOM) and DVR, respectively, to ride through the voltage swell. Nevertheless, the cost and high rating of flexible AC transmission systems (FACTS) devices make such kind of HVRT techniques unattractive economically.…”

Section: Introductionmentioning

confidence: 99%

Realization of fault ride through for doubly fed induction generator system with cascade converter

Din

Zhang

Zheng

et al. 2021

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

Summary The doubly fed induction generator (DFIG) system is prevalent in the wind power industry due to cost‐effective variable speed operation and part size power converter. The DFIG system dynamic performance might be degraded by oscillations of the electromagnetic torque and instantaneous stator power under grid faults. This paper proposes an improved method to augment the dynamic performance of the DFIG system under the aforesaid scenarios, where an additional cascade converter (CC) is serially connected at Y‐point of DFIG stator windings. The DFIG performance under low‐voltage ride through (LVRT) and high‐voltage ride through (HVRT) is improved with the proposed control topology. Additionally, with auxiliary control provision, the proposed method can improve the stability of the DFIG system. The theoretical analysis and Matlab/Simulink simulations validate the effectiveness of the proposed method.

show abstract

Mitigation of Voltage Dips and Swells in Grid-connected Wind Energy Conversion Systems

Cited by 23 publications

References 3 publications

Evaluation and Comparison of Different Methods for Improving Fault Ride-Through Capability in Grid-Tied Permanent Magnet Synchronous Wind Generators

Evaluation and Comparison of Different Methods for Improving Fault Ride-Through Capability in Grid-Tied Permanent Magnet Synchronous Wind Generators

Offshore Wind Farm-Grid Integration: A Review on Infrastructure, Challenges, and Grid Solutions

Realization of fault ride through for doubly fed induction generator system with cascade converter

Contact Info

Product

Resources

About