Short-term frequency support utilizing inertial response of DFIG wind turbines

Itani, Samer El; Annakkage, U.D.; Joós, G.

doi:10.1109/pes.2011.6038914

Cited by 81 publications

(79 citation statements)

References 16 publications

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“…To minimize the effects of this changeover from deceleration to acceleration, transition along a slope was suggested in Ref. [35]; though the effect of this additional shaping parameter was not evaluated.…”

Section: Introductionmentioning

confidence: 99%

Optimal use of kinetic energy for the inertial support from variable speed wind turbines

2015

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a b s t r a c tThe use of kinetic energy, stored in the rotational masses of Variable Speed Wind Turbines (VSWT), for inertial support is well established. The idea is to employ the fast control response of the VSWT to inject additional power for the short duration following the disturbance. However, the variable speed operation of the VSWT poses a great challenge in successfully designing an appropriate control approach, applicable for wide operating ranges, capable of minimizing the effects of energy regain by the Wind Turbine (WT) after the support period. To address this issue, this paper proposes a modified inertia-emulation scheme, based on Step Over-Production (SOP) approach. Further, to enable optimum energy transfer and to handle the problem of variable Stored Kinetic Energy (SKE), the shaping parameters of the proposed scheme are optimized using the Particle Swarm Optimization (PSO) algorithm. The results show that the proposed approach can limit the fall of frequency while reducing post disturbances across the entire operating range of the WT. In addition, the quantitative analysis reveals that the proposed method can easily satisfy the stringent grid code requirements for the inertia emulation and provides a better alternative to the conventional inertia control architectures.

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Section: Introductionmentioning

confidence: 99%

Optimal use of kinetic energy for the inertial support from variable speed wind turbines

2015

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“…Conversely, an excessively small T drop results in a rapid output drop, thereby causing an SFD. In [14], 10 s is used for T drop . Consequently, SIC #2 partly lessens the degree of an SFD, but is unable to completely prevent it.…”

Section: Conventional Sic Schemes Of a Dfigmentioning

confidence: 99%

“…Inertial control can be divided into two groups: frequency based inertial control (FBIC) [4][5][6][7][8][9] and stepwise inertial control (SIC) [10][11][12][13][14][15]. Based on the measured frequency, FBIC employs one or two auxiliary loops: a rate of change of frequency (ROCOF) loop [4], a frequency deviation loop [5], ROCOF and frequency deviation loops [6], and maximum ROCOF and frequency deviation loops [7].…”

Section: Introductionmentioning

confidence: 99%

“…Such a decrease may act as a power deficit in a power system, thereby causing a second frequency dip (SFD). To reduce this drawback, ramp reduction has been suggested as an alternative to instant reduction [14,15]. While these schemes partly lessen the degree of an SFD, they are unable to completely prevent it.…”

Section: Introductionmentioning

confidence: 99%

“…1 illustrates the operational features of two conventional SIC schemes proposed in [10] and [14]. For convenience, the SICs [10] and [14] are denoted as SIC #1 and SIC #2, respectively. Upon detecting an event, SIC #1 and SIC #2 switch the reference for MPPT control, P MPPT , to the reference for SIC, P SIC , as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hybrid Reference Function for Stable Stepwise Inertial Control of a Doubly-Fed Induction Generator

Yang¹,

Lee²,

Hur³

et al. 2016

Journal of Electrical Engineering and Technology

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-Upon detecting a frequency event in a power system, the stepwise inertial control (SIC) of a wind turbine generator (WTG) instantly increases the power output for a preset period so as to arrest the frequency drop. Afterwards, SIC rapidly reduces the WTG output to avert over-deceleration (OD). However, such a rapid output reduction may act as a power deficit in the power system, and thereby cause a second frequency dip. In this paper, a hybrid reference function for the stable SIC of a doublyfed induction generator is proposed to prevent OD while improving the frequency nadir (FN). To achieve this objective, a reference function is separately defined prior to and after the FN. In order to improve the FN when an event is detected, the reference is instantly increased by a constant and then maintained until the FN. This constant is determined by considering the power margin and available kinetic energy. To prevent OD, the reference decays with the rotor speed after the FN. The performance of the proposed scheme was validated under various wind speed conditions and wind power penetration levels using an EMTP-RV simulator. The results clearly demonstrate that the scheme successfully prevents OD while improving the FN at different wind conditions and wind power penetration levels. Furthermore, the scheme is adaptive to the size of a frequency event.

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Challenges in Planning and Operation of Large‐Scale Renewable Energy Resources Such as Solar and Wind

Vishnupriyan¹,

Dhanasekaran

2021

Integration of Renewable Energy Sources With Smart Grid

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Short-term frequency support utilizing inertial response of DFIG wind turbines

Cited by 81 publications

References 16 publications

Optimal use of kinetic energy for the inertial support from variable speed wind turbines

Optimal use of kinetic energy for the inertial support from variable speed wind turbines

Hybrid Reference Function for Stable Stepwise Inertial Control of a Doubly-Fed Induction Generator

Challenges in Planning and Operation of Large‐Scale Renewable Energy Resources Such as Solar and Wind

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