Reactive power control strategy of DFIG‐based wind farm to mitigate SSO

Xi, Wu; Guan, Yajing; Wu, Ning

doi:10.1049/joe.2017.0537

Cited by 8 publications

(5 citation statements)

References 14 publications

(15 reference statements)

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“…The uncertainty factors (such as wind turbine switching, short circuit fault, and wind speed) usually affect the operating point of the system. Considering the flexibility of DFIGs [25][26][27], the SSO caused by these factors can be suppressed by regulating the reactive power. However, it is difficult to calculate the required reactive power of SSO suppression for all operating points.…”

Section: The Control Strategy Based On Reactive Power Regulationmentioning

confidence: 99%

Low‐cost control strategy based on reactive power regulation of DFIG‐based wind farm for SSO suppression

Guan

Xiang

et al. 2018

IET Renewable Power Generation

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For doubly fed induction generator (DFIG)-based wind farms, the occurrence of sub-synchronous oscillation (SSO) is detrimental to the system operation and should be suppressed promptly. A low-cost control strategy based on reactive power regulation of DFIG-based wind farm is proposed to suppress SSO. First, the influence of the reactive power output of wind farms on SSO is studied in the entire operating region of DFIGs, and several uncertainty factors are taken into account. Furthermore, a reactive power regulation-based control strategy is proposed to suppress SSO by changing the operating point of the system. In addition, a PASTd (Projection Approximation Subspace Tracking based on the Deflation Technique)-based identification method is utilised to realise the online SSO monitoring. The implementation of the proposed control strategy is low cost since it does not require any additional supplementary equipment. The time-domain simulation results have also verified the effectiveness and strong robustness of the proposed control strategy.

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Section: The Control Strategy Based On Reactive Power Regulationmentioning

confidence: 99%

Low‐cost control strategy based on reactive power regulation of DFIG‐based wind farm for SSO suppression

Guan

Xiang

et al. 2018

IET Renewable Power Generation

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“…If this coupling relationship is ignored and parameter adjustment is performed, the effect of sub-synchronous oscillation suppression may not be achieved, but instead the system may become unstable. Paper [6] qualitatively analyzes the interaction effect of the RSC inner and outer loop proportional parameter on the SSCI in terms of the oscillation mechanism and verifies it using eigenvalue analysis.conducts impedance sensitivity analysis based on the Sobol method, calculates quantitative indicators to evaluate the coupling relationship between various parameters, and performs quantitative analysis. However, the research on the coupling relationship is limited to the control part of the RSC of DFIG.…”

Section: Introductionmentioning

confidence: 99%

Equivalent impedance modeling and control parameters effect analysis of DFIG

Guo,

Li,

Tan

et al. 2024

Eighth International Conference on Energy System, Electricity, and Power (ESEP 2023)

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The doubly-fed induction generator(DFIG) is connected to a series compensation line, and the converter controllers interact with the series compensation line to produce sub-synchronous control interaction(SSCI). In this paper, a method of solving the equivalent resistance modeling of DFIG through a small-signal path is proposed to get the effect of converter control parameters on the damping of DFIG. Firstly, The small signal model is solved by the dynamic equation of DFIG, and the equivalent impedance of the small signal path is obtained. Secondly, the Morris screening method takes the equivalent impedance as the evaluation quantity to screen out the control parameters that have a great impact on damping and the control parameters with coupling effect. Finally, The control parameters have a coupling effect and have different degrees of influence on SSCI through the simulation analysis, so the optimized design of controller parameters can attenuate SSCI of DFIG and reduce the risk.

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“…In this way, the logic is simple and easy to operate. As the mainstream model in wind farms [12,13], the ability of DFIG to suppress the sub-synchronous oscillation is concerned by many experts and scholars at home and abroad [14][15][16][17][18][19]. In reference [20], the reactive power output capability of the DFIG stator side is deeply excavated and utilized, which improves the flexibility of the reactive power and voltage regulation, but sacrifices its maximum wind energy tracking capability, and reduces the utilization rate of wind energy.…”

Section: Introductionmentioning

confidence: 99%

Recurrence of Sub-Synchronous Oscillation Accident of Hornsea Wind Farm in UK and Its Suppression Strategy

et al. 2021

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A large-scale power system breakdown in the United Kingdom caused blackouts in several important cities, losing about 3.2 percent of the load and affecting nearly 1 million power users on 9 August 2019. On the basis of the accident investigation report provided by the UK National Grid, the specific reasons for the sub-synchronous oscillation of Hornsea wind farm were analyzed. The Hornsea wind power system model was established by MATLAB simulation software to reproduce the accident. To solve this problem, based on the positive and negative sequence decomposition, the control strategy of grid-side converter of doubly-fed induction generator is improved to control the positive sequence voltage of the generator terminal, which can quickly recover the voltage by compensating the reactive power at the grid side. Consequently, the influence of the fault is weakened on the Hornsea wind farm system, and the sub-synchronous oscillation of the system is suppressed. The simulation results verify the effectiveness of the proposed control strategy in suppressing the sub-synchronous oscillation of weak AC wind power system after being applied to doubly-fed induction generator, which serves as a reference for studying similar problems of offshore wind power.

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Reactive power control strategy of DFIG‐based wind farm to mitigate SSO

Cited by 8 publications

References 14 publications

Low‐cost control strategy based on reactive power regulation of DFIG‐based wind farm for SSO suppression

Low‐cost control strategy based on reactive power regulation of DFIG‐based wind farm for SSO suppression

Equivalent impedance modeling and control parameters effect analysis of DFIG

Recurrence of Sub-Synchronous Oscillation Accident of Hornsea Wind Farm in UK and Its Suppression Strategy

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