TY  - JOUR
UR  - https://www.mdpi.com/1996-1073/13/13/3369
PB  - MDPI
AV  - public
A1  - Fernández Guillamón, Ana
A1  - Martínez de Lucas, Guillermo
A1  - Molina García, Ángel
A1  - Sarasúa Moreno, José Ignacio
SP  - 3369
JF  - Energies
TI  - An Adaptive Control Scheme for Variable Speed Wind Turbines Providing Frequency Regulation in Isolated Power Systems with Thermal Generation
ID  - upm62923
N2  - The lack of synchronous inertia, associated with the relevant penetration of variable speedwind turbines (VSWTs) into isolated power systems, has increased their vulnerability to strongfrequency deviations. In fact, the activation of load shedding schemes is a common practice when anincident occurs, i.e., the outage of a conventional unit. Under this framework, wind power plantsshould actively contribute to frequency stability and grid reliability. However, the contribution ofVSWTs to frequency regulation involves several drawbacks related to their efficiency and equipmentwear due to electrical power requirements, rotational speed changes, and subsequently, shaft torqueoscillations. As a result, wind energy producers are not usually willing to offer such frequencyregulation. In this paper, a new control technique is proposed to optimize the frequency response ofwind power plants after a power imbalanced situation. The proposed frequency controller dependson different power system parameters through a linear regression to determine the contribution ofwind power plants for each imbalance condition. As a consequence, VSWTs frequency contributionis estimated to minimize their mechanical and electrical efforts, thus reducing their equipment wear.A group of sixty supply-side and imbalance scenarios are simulated and analyzed. Results of the casestudy are compared to previous proposals. The proposed adaptive control reduces the maximumtorque and rotational speed variations while at the same time maintaining similar values of the loadshedding program. Extensive results and discussion are included in the paper.
SN  - 1996-1073
IS  - 13
VL  - 13
EP  - 3369
Y1  - 2020/07/01/
KW  - Frequency Control
KW  -  Isolated System
KW  -  Linear Regression
KW  -  Power System Stability
KW  -  Wind
KW  -  Turbines
ER  -