NDLI: Analytical determination of stable droop loop gain for a DFIG participating in frequency regulation

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AC excitation control strategy of variable speed pumped storage units based on active disturbance rejection control

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‘HVDC optimisation’ – driving down the cost of large-scale offshore wind

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Analytical determination of stable droop loop gain for a DFIG participating in frequency regulation

Content Provider	IET Digital Library
Author	Liu, Jinqiang Wang, Xiaoru
Abstract	One prominent concern over the high level wind power penetration is the consequent frequency stability issue in the power systems. To address this problem, additional droop loop control is widely adopted as an effective inertial control scheme to improve the system frequency nadir during a contingency event by temporarily releasing the stored rotational kinetic energy. The droop loop gain presents significant effect on both the performance of the frequency regulation and the operation stability of the doubly fed induction generator (DFIG). In order to ensure the stable operation of the DFIG during the frequency regulation process, this study proposes an analytical determination method of the stable droop loop gain based on system frequency analysis and bifurcation theory. The stability criterion of the rotor speed of the DFIG with droop loop control is theoretically formulated, taking into account extensive factors such as wind speed, active power deficit, and configuration parameters of the power system and DFIG. The critical droop loop gain can be calculated from the critical stability criterion equation. Simulations are carried out to validate the benefits and accuracy of the proposed determination method of stable droop loop gain.
Starting Page	1447
Ending Page	1452
Page Count	6
Volume Number	2017
e-ISSN	20513305
Issue Number	Issue 13, Jan (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/joe/2017/13
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/joe.2017.0571
Journal	The Journal of Engineering
Publisher	The Institution of Engineering and Technology
Publisher Date	2017-01-01
Access Restriction	Open
Rights License	Creative Commons Attribution-Non Commercial-No Derivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)
Subject Keyword	Asynchronous Generator Asynchronous Machine Bifurcation Bifurcation Theory Consequent Frequency Stability Issue Control of Electric Power System Critical Droop Loop Gain DFIG Doubly Fed Induction Generator Droop Loop Control Droop Loop Gain Frequency Control Frequency Regulation Process Frequency Stability Inertial Control Scheme Power System Rotational Kinetic Energy Rotors Stability in Control Theory System Frequency Analysis Wind Power Penetration Wind Power Plant
Content Type	Text
Resource Type	Article

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