Active and Reactive Power Control for Dual Excited Synchronous Generator in Wind Applications

Yassin, H. M.; Abdel-Wahab, R. R.; Hanafy, H. H.

doi:10.1109/access.2022.3158621

Cited by 11 publications

(12 citation statements)

References 31 publications

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“…Since the early stages of WTs' development, significant efforts have been made to use three-phase SGs. The SG is simply a synchronized electromechanical device consisting of a Rotating Magnetic Field (RMF) on the rotor and a static stator with several coils delivering the generated output [43]. The rotor winding is energized electromagnetically by an auxiliary DC supply connected across the rotor-circuit windings or by permanent magnets attached [44].…”

Section: Ac Synchronous Generatorsmentioning

confidence: 99%

“…These controllers' performance is demonstrated using simulation results for various wind speeds. Even though PM removes field winding, flux through the rotor cannot be adjuste and it can only attain maximum efficiency under certain conditions, such as a certain win speed [43]. In addition, demagnetization generated by a too high current or temperatu and the extravagant cost of permanent magnets are additional disadvantages of these gen erators.…”

Section: Ac Synchronous Generatorsmentioning

confidence: 99%

“…FSIG has certain downsides, including the fact that the blades may not be in the op timal operating position for a range of scenarios and the inability to produce energ quickly, owing to the blades' pitch angle being the only variable. In addition, FSIGs hav intrinsic issues such as low energy conversion, inflexibility in allowing grid voltage regu Even though PM removes field winding, flux through the rotor cannot be adjusted, and it can only attain maximum efficiency under certain conditions, such as a certain wind speed [43]. In addition, demagnetization generated by a too high current or temperature and the extravagant cost of permanent magnets are additional disadvantages of these generators.…”

Section: Ac Asynchronous Generatorsmentioning

confidence: 99%

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Wind Energy Potential in Pakistan: A Feasibility Study in Sindh Province

et al. 2022

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The environment and the economy are negatively impacted by conventional energy sources, such as coal, gasoline, and other fossil fuels. Pakistan’s reliance on these resources has resulted in a catastrophic energy crisis. This has driven the government to make critical decisions such as early retail closures, power outages for the industrial sector, and an increase to two days a week vacations. Wind energy, accessible and affordable, will become a viable option for meeting Pakistan’s present and future energy demands. Approximately 3% of Pakistan’s land can produce nearly 132 GW of power with an installed capacity of 5 MW per km2. In this study, four zones (Karachi, Thatta, Badin, and Jamshoro) in Sindh province are assessed for the feasibility of wind energy generation. The installed capacity, generator types, and detailed specifications are provided for each zone. Moreover, the wind mapping of Pakistan is presented considering the four potential zones. The zones are analyzed using annual wind speed and power output considering wind data measured at 50 m height over one year. The higher mean speed is recorded at Jamshoro compared to other zones. The analysis indicates that all four sites are suitable for large-scale wind power generation due to their energy potential.

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Section: Ac Synchronous Generatorsmentioning

confidence: 99%

Section: Ac Synchronous Generatorsmentioning

confidence: 99%

Section: Ac Asynchronous Generatorsmentioning

confidence: 99%

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Wind Energy Potential in Pakistan: A Feasibility Study in Sindh Province

et al. 2022

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“…The phase-shift winding WRSM, which exhibit fluxvariation characteristic and reactive power compensation, typical in wound-field excited generators, is a very attractive option for direct grid-connected wind power generation [17]- [18]. The flux-variation characteristics allow for regulation of the phase voltage when the wind speed varies.…”

Section: Introductionmentioning

confidence: 99%

Optimization and Performance Evaluation of Non-Overlap Wound-Field Converter-Fed and Direct-Grid Wind Generators

2022

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Non-overlap winding technology continues to remain relevant in the design of wound-field machines as an alternative for high torque density permanent magnet machines. In this paper, the finite element analyses-optimisation of two variants of the non-overlap wound-field machines viz., wound-field flux switching machine (WF-FSM) and phase shifting wound rotor synchronous machine (WRSM), are compared, first in terms of their performance for large-scale converter-fed wind generator drives, then experimentally as sub-scaled converter-fed versus direct grid-connected wind generators, respectively. This study is unique because there are no prior attempts to design, optimize and analyse on these machines for medium-speed wind power generation, as well as experiment on sub-scale prototypes for direct-grid and converter-fed operation. All investigations are contemplated in the medium-speed wind generator drivetrain which provides a tradeoff for generator efficiency and size. From the global optimisation of both machines at large-scale power levels, the torque per mass of the WF-FSM is found to be 50 % lesser compared to the WRSM. This is due to approximate volume, with closely matched optimal split and aspect ratios. In terms of the sub-scaled experimentation, both generators can easily vary their generated output power to match with varying wind resource, but direct grid-connected WRSM generator yields better efficiency performance compared to the WF-FSM converter-fed operating mode, given that the generator terminal voltage of the former is highly regulated.INDEX TERMS converter-fed, direct grid-connected, finite element analyses, non-overlap winding, optimisation, medium-speed wind generators, wound-field flux switching machine (WF-FSM), wound rotor synchronous machine (WRSM).

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“…Using a proper control technique for the DESG field parameters, the DESG can operate as a variable-speed constant-frequency (VSCF) generation system with controlling the output active power or as a constant-speed constant-frequency (CSCF) generation system with the advantage of controlling reactive power similar to the DFIG with the advantages of easier control, and higher efficiency (Piegari et al, 2007; Yassin et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Investigation of LVRT capability of wind driven dual excited synchronous generator

2022

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This paper proposes an effective control technique for low voltage ride through (LVRT) capability in dual excited synchronous generator (DESG) wind turbines. The proposed control technique is dependent on controlling the field circuit parameters. Where the active power is controlled by the field-current space phasor magnitude and the reactive power is controlled by the field-voltage space phasor phase. With the proposed control strategy, the DESG can generate additional reactive power to support grid voltage recovery under grid faults. The DC-link voltage is kept within an acceptable limit since the excess power, due to the power mismatch between the mechanical and armature power is stored in the generator inertia. Using the proposed control strategy, the DESG can enhance the LVRT capability efficiently without using extra protection circuits or any additional control techniques during fault conditions. To test the proposed control method, simulation, and experimental results for a 1.1 kW DESG wind turbine system were obtained.

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Active and Reactive Power Control for Dual Excited Synchronous Generator in Wind Applications

Cited by 11 publications

References 31 publications

Wind Energy Potential in Pakistan: A Feasibility Study in Sindh Province

Wind Energy Potential in Pakistan: A Feasibility Study in Sindh Province

Optimization and Performance Evaluation of Non-Overlap Wound-Field Converter-Fed and Direct-Grid Wind Generators

Investigation of LVRT capability of wind driven dual excited synchronous generator

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