Flicker Emission of distributed wind power: A review of impacts, modeling, grid codes and mitigation techniques

Ammar, Moataz

doi:10.1109/pesgm.2012.6344669

Cited by 13 publications

(5 citation statements)

References 35 publications

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“…Same as expressed about the eliminations of E rdq effects, using the feed-forward compensator is suitable when these terms seriously cause power quality problems. By compensating the cross coupling terms, the d and q axes rotor current control loops will be decoupled [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24].…”

Section: Electrical Modelmentioning

confidence: 99%

“…Sometimes, it is necessary to vary grid voltage level by changing power factor and thus using this method is limited. Another procedure is called voltage control and, according to this method, the reference reactive power is derived via a stator voltage control loop by a voltage regulator [18,19]. Voltage control method is limited due to the probability of interfering with the utility-imposed feeder voltage control mechanism such as on-load tap changers (OLTCs).…”

Section: Introductionmentioning

confidence: 99%

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A new approach for power quality improvement of DFIG based wind farms connected to weak utility grid

Mahvash

Taher

Rahimi

2017

Ain Shams Engineering Journal

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Most of power quality problems for grid connected doubly fed induction generators (DFIGs) with wind turbine include flicker, variations of voltage RMS profile, and injected harmonics due to switching in DFIG converters. Flicker phenomenon is the most important problem in wind power systems. This paper described an effective method for mitigating flicker emission and power quality improvement for a fairly weak grid connected to a wind farm with DFIGs. The method was applied in the rotor side converter (RSC) of the DFIG to control the output reactive power. q axis reference current was directly derived according to the mathematical relation between rotor q axis current and DFIG output reactive power without using PI controller. To extract the reference reactive power, the stator voltage control loop with the droop coefficient was proposed to regulate the grid voltage level in each operational condition. The DFIG output active power was separately controlled in d axis considering the stator voltage orientation control (SVOC). Different simulations were carried out on the test system and the flicker short term severity index ðP st Þ was calculated for each case study using the discrete flickermeter model according to IEC 61400 standard. The obtained results validated flicker mitigation and power quality enhancement for the grid. Ó 2015 Faculty of Engineering, Ain Shams University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Section: Electrical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A new approach for power quality improvement of DFIG based wind farms connected to weak utility grid

Mahvash

Taher

Rahimi

2017

Ain Shams Engineering Journal

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“…Utilities in the regulated market were not worried about this issue because low flicker values obtained. But, as the installed wind capacity is expected to increase significantly in the next ten years, global emission limits of flicker could be compromised [15].…”

Section: Discussionmentioning

confidence: 99%

Influence of the Fictitious Grid on Flicker Assessment of Grid Connected Wind Turbine

Redondo¹,

Lazkano²,

Saiz³

et al. 2024

RE&PQJ

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Abstract. This work studies the influence of the signal processing method on the flicker measurement of grid connected wind turbine in continuous operation according to the procedure detailed in the IEC 61400-21 standard. Two different methods for solving the fictitious grid are analyzed: Zero Crossing Detection and Short Time Fourier Transform. The deviations in the flicker measurement results obtained by applying both methods to actual signals from a measurement campaign are discussed. And the results are compared taking into account the grid impedance angle and the wind condition.

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“…Reactive power compensation can be employed to distributed wind installations by conventional equipment such as a static VAR compensator (SVC) or static synchronous compensator (STATCOM) as mentioned in ref. [8,9]. The purchase of this additional equipment, however, presents an infeasible solution for distributed-wind applications [10].…”

Section: Introductionmentioning

confidence: 99%

Flicker Mitigation via Dynamic Volt/VAR Control of Power-Electronic Interfaced WTGs

Mascarella

Venne

Guerette

et al. 2015

IEEE Trans. Power Delivery

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The emerging trend for electric utilities to install wind based generation on a large scale into distribution networks, employing DFIG or full converter turbine technologies is raising issues for distribution planning engineers with regard to flicker amongst other power quality issues. This paper investigates dynamic Volt/VAR control, a viable flicker mitigation technique which exploits the reactive power capabilities of modern power electronic interfaced wind turbine generators (WTGs). Dynamic Volt/VAR control essentially mitigates flicker by solely dispatching reactive power based on voltage fluctuations within the flicker frequency band. This technique can be incorporated as part of a wind farm multiobjective reactive power control scheme, which facilitates regulating both 1) the voltage level at the point of common coupling (PCC) employing slow acting voltage control or power factor control and 2) the flicker level at the PCC with fast acting dynamic Volt/VAR control. This two-level approach can reduce the wind farm flicker level up to 80 % and maintains the voltage level at the PCC well within acceptable bands. The results presented in this paper focus on a typical 25 kV medium voltage distribution feeder integrating wind based generation on a large scale. The performance of the two-level controller was tested for varying levels of penetration and wind speed conditions. The applicable standards and utility grid code requirements are considered throughout.

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Flicker Emission of distributed wind power: A review of impacts, modeling, grid codes and mitigation techniques

Cited by 13 publications

References 35 publications

A new approach for power quality improvement of DFIG based wind farms connected to weak utility grid

A new approach for power quality improvement of DFIG based wind farms connected to weak utility grid

Influence of the Fictitious Grid on Flicker Assessment of Grid Connected Wind Turbine

Flicker Mitigation via Dynamic Volt/VAR Control of Power-Electronic Interfaced WTGs

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