Estimating PMSG Wind Turbines by Inertia and Droop Control Schemes with Intelligent Fuzzy Controller in Indian Development

L, Josephine. R.; Suja, S.

doi:10.5370/jeet.2014.9.4.1196

Cited by 34 publications

(22 citation statements)

References 17 publications

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“…The combination of the ROCOF loop and the droop loop has been suggested for mitigating the negative contribution from ROCOF loop and releasing a large amount of power until the frequency nadir [8]. The droop gain is adjusted depending on the rotor speed of a WG to release more KE [9] and it is dynamically controlled by using a fuzzy controller to maintain the power system frequency [10]. The maximum ROCOF is used to overcome the negative impact of the ROCOF loop [11].…”

Section: Introductionmentioning

confidence: 99%

“…To do this, WPP inertial control schemes based on the power system frequency have been reported [6][7][8][9][10][11]. The auxiliary loops, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…The auxiliary loops, i.e. a rate of change of frequency (ROCOF) loop [6,7], a droop loop with a ROCOF loop [8][9][10], and a droop loop with the maximum ROCOF loop [11], were proposed to release the kinetic energy (KE) stored in the rotating mass of WGs.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Droop-based Inertial Control of a Wind Power Plant

Hwang

Chun

Park³

et al. 2015

Journal of Electrical Engineering and Technology

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-The frequency of a power system should be maintained within the allowed limits for stable operation. When a disturbance such as generator tripping occurs in a power system, the frequency is recovered to the nominal value through the inertial, primary, and secondary responses of the operating synchronous generators (SGs). However, for a power system with high wind penetration, the system inertia will decrease significantly because wind generators (WGs) are operating decoupled from the power system. This paper proposes a dynamic droop-based inertial control for a WG. The proposed inertial control determines the dynamic droop depending on the rate of change of frequency (ROCOF). At the initial period of a disturbance, where the ROCOF is large, the droop is set to be small to release a large amount of the kinetic energy (KE) and thus the frequency nadir can be increased significantly. However, as times goes on, the ROCOF will decrease and thus the droop is set to be large to prevent over-deceleration of the rotor speed of a WG. The performance of the proposed inertial control was investigated in a model system, which includes a 200 MW wind power plant (WPP) and five SGs using an EMTP-RV simulator. The test results indicate that the proposed scheme improves the frequency nadir significantly by releasing a large amount of the KE during the initial period of a disturbance.

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Section: Introductionmentioning

confidence: 99%

“…To do this, WPP inertial control schemes based on the power system frequency have been reported [6][7][8][9][10][11]. The auxiliary loops, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Droop-based Inertial Control of a Wind Power Plant

Hwang

Chun

Park³

et al. 2015

Journal of Electrical Engineering and Technology

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“…Many frequency-based inertial control (FBIC) schemes of variable speed WTGs have been proposed that release the KE stored in the rotating masses using frequency to support frequency control [6][7][8][9][10]. The FBIC schemes employ two kinds of auxiliary loops based on the rate of change of frequency (ROCOF) [6] and/or the ROCOF loop with the frequency deviation loop [7].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, because the additional power is determined not by the KE in the WTGs but by the frequency, the contribution to frequency support is limite/d. On the other hand, to give more contribution to the frequency support, the droop gain was adjusted depending on the rotor speed of WTGs [8]; the maximum ROCOF instead of the ROCOF was used to improve the response of the ROCOF loop [9]; the loops gains were dynamically changed by using a fuzzy controller to maintain the power system frequency [10].…”

Section: Introductionmentioning

confidence: 99%

Stepwise Inertial Control of a Doubly-Fed Induction Generator to Prevent a Second Frequency Dip

Kang¹,

Lee²,

Hur³

et al. 2015

Journal of Electrical Engineering and Technology

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-To arrest a frequency nadir, a stepwise inertial control (SIC) scheme generates a constant active power reference signal of a wind turbine generator (WTG) immediately after a disturbance and maintains it for the predetermined time. From that point, however, the reference of a WTG abruptly decreases to restore the rotor speed for the predefined period. The abrupt decrease of WTG output power will inevitably cause a second frequency dip. In this paper, we propose a modified SIC scheme of a doubly-fed induction generator (DFIG) that can prevent a second frequency dip. A reference value of the modified SIC scheme consists of a reference for the maximum power point tracking control and a constant value. The former is set to be proportional to the cube of the rotor speed; the latter is determined so that the rotor speed does not reach the minimum operating limit by considering the mechanical power curve of a DFIG. The performance of the modified SIC was investigated for a 100 MW aggregated DFIG-based wind power plant under various wind conditions using an EMTP-RV simulator. The results show that the proposed SIC scheme significantly increases the frequency nadir without causing a second frequency dip.

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Novel insight on temporary frequency support of variable speed wind energy conversion system

et al. 2021

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In the recent decade, temporary frequency support derived from variable speed wind turbine generator has been drawing increasing attention in the electronic‐growing power system. Frequency nadir and rate of change of frequency are two key indicators temporary frequency support strives to improve. This paper proposes a novel insight on frequency regulation of wind power. Note that considerable part of load is shared by synchronous generators and wind turbine generator and the system frequency still will be dominated by the former for a period of time. Simultaneously taking the frequency regulation characteristic of synchronous and power balance into account, a novel frequency regulation scheme aiming at improving system's frequency regulation performance is proposed and tested in a 7‐machine power system with an aggregated wind farm on MATLAB/Simulink to investigate what inherently determines the performance of frequency regulation. Results show that with differential cooperation of synchronous generator and doubly fed induction generator, frequency nadir and rate of change of frequency can be partially improved. Particularly, regarding to handling the issue of control delay, an appropriately slower action upon detecting a frequency event may not screw up it but contribute to a higher frequency nadir, which benefits from the spontaneous cooperation of synchronous generator and wind power with constraint of power balance.

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Estimating PMSG Wind Turbines by Inertia and Droop Control Schemes with Intelligent Fuzzy Controller in Indian Development

Cited by 34 publications

References 17 publications

Dynamic Droop-based Inertial Control of a Wind Power Plant

Dynamic Droop-based Inertial Control of a Wind Power Plant

Stepwise Inertial Control of a Doubly-Fed Induction Generator to Prevent a Second Frequency Dip

Novel insight on temporary frequency support of variable speed wind energy conversion system

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