Improvement of grid frequency dynamic characteristic with novel wind turbine based on electromagnetic coupler

You, Rui; Barahona, Braulio; Chai, Jianyun; Cutululis, Nicolaos Antonio; Wu, Xinzhen

doi:10.1016/j.renene.2017.06.038

Cited by 13 publications

(9 citation statements)

References 13 publications

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“…Therefore, it is necessary that RES becomes an active agent in grid frequency regulation [51]. Several TSOs require that RES contributes to ancillary services as well [52], especially wind power plants [53].…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…As a result, larger frequency deviations are achieved after an imbalance between supply-side and demand when RES replace conventional units without providing frequency response [50]. Therefore, it is necessary that RES become an active agent in grid frequency regulation [51]. Actually, several TSOs are requiring that RES contribute to ancillary services as well [52], especially wind power plants [53].…”

Section: Swing Equation Of a Power System Equivalent Rotational Syste...mentioning

confidence: 99%

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Analysis of power system inertia estimation in high wind power plant integration scenarios

Fernández‐Guillamón

Vigueras-Rodríguez

Molina‐García

2019

IET Renewable Power Generation

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Nowadays, power system inertia is changing as a consequence of replacing conventional units by renewable energy sources, mainly wind and PV power plants. This fact affects significantly the grid frequency response under power imbalances. As a result, new frequency control strategies for renewable plants are being developed to emulate the behaviour of conventional power plants under such contingencies. These approaches are usually called 'virtual inertia emulation techniques'. In this paper, an analysis of power system inertia estimation from frequency excursions is carried out by considering different inertia estimation methodologies, discussing the applicability and coherence of these methodologies under the new supply-side circumstances. The modelled power system involves conventional units and wind power plants, including wind frequency control strategies in line with current mix generation scenarios. Results show that all methodologies considered provide an accurate result to estimate the equivalent inertia based on rotational generation units directly connected to the grid. However, significant discrepancies are found when frequency control strategies are included in wind power plants decoupled from the grid. In this way, authors consider that it is necessary to define alternative inertia estimation methodologies by including virtual inertia emulation. Extensive discussion and results are also provided in this study.

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Section: Theoretical Backgroundmentioning

confidence: 99%

Section: Swing Equation Of a Power System Equivalent Rotational Syste...mentioning

confidence: 99%

Analysis of power system inertia estimation in high wind power plant integration scenarios

Fernández‐Guillamón

Vigueras-Rodríguez

Molina‐García

2019

IET Renewable Power Generation

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“…At present, most domestic wind turbines are variable-speed wind turbines. The speed of such generators is decoupled from the system frequency [1][2][3]. The wind turbines cannot provide conventional inertial response for the power system, which will cause the frequency of the power system including wind power to decrease under the same disturbance and has a serious impact on power system frequency regulation.…”

Section: Introductionmentioning

confidence: 99%

Real-time Monitoring System and Method of PFC Capability of Power Grid Based on Data Analysis

Li¹,

Miao

Zhang

2021

E3S Web Conf.

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The development of wind power and other new energy sources has a great impact on the stability of power system frequency. By analyzing the characteristics of the primary frequency control(PFC) assessment standard of the power grid, one real-time monitoring method of the unit’s PFC capability of the power grid based on data analysis is proposed. The Power network dispatching department can fully grasps the overall frequency regulation capability of the operating units. It can improve the grid’s response methods to deal with high power gaps and ensure the safe and stable operation of the grid.

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“…Wind power generally does not participate in frequency regulation due to the decoupling of the WT rotor and the grid frequency, so large-scale wind power access to the grid will significantly weaken the frequency regulation capability of the grid [9,10]. With the continuous increase of the wind power penetration rate, the influence of wind power volatility and uncertainty on the frequency regulation of power systems is also increasing [11][12][13][14][15]. In order to meet grid frequency requirements, active power control (APC) method for wind power is critical to actively maintaining a balance between power generation.…”

Section: Introductionmentioning

confidence: 99%

Active Power Dispatch for Supporting Grid Frequency Regulation in Wind Farms Considering Fatigue Load

Liu

Wang

et al. 2019

Energies

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This paper proposes an active power control method for supporting grid frequency regulation in wind farms (WF) considering improved fatigue load sensitivity of wind turbines (WT). The control method is concluded into two parts: frequency adjustment control (FAC) and power reference dispatch (PRD). On one hand, the proposed Fuzzy-PID control method can actively maintain the balance between power generation and grid load, by which the grid frequency is regulated when plenty of winds are available. The fast power response can be provided and frequency error can be reduced by the proposed method. On the other hand, the sensitivity of the WT fatigue loads to the power references is improved. The explicit analytical equations of the fatigue load sensitivity are re-derived to improve calculation accuracy. In the process of the optimization dispatch, the re-defined fatigue load sensitivity will be used to minimize fatigue load. Case studies were conducted with a WF under different grid loads and turbulent wind with different intensities. By comparing the frequency response of the WF, rainflow cycle, and Damage Equivalent Load (DEL) of the WT, the efficacy of the proposed method is verified.

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Improvement of grid frequency dynamic characteristic with novel wind turbine based on electromagnetic coupler

Cited by 13 publications

References 13 publications

Analysis of power system inertia estimation in high wind power plant integration scenarios

Analysis of power system inertia estimation in high wind power plant integration scenarios

Real-time Monitoring System and Method of PFC Capability of Power Grid Based on Data Analysis

Active Power Dispatch for Supporting Grid Frequency Regulation in Wind Farms Considering Fatigue Load

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