Impact of SVC on Voltage Stability of HWF Wind Farm during Grid Disturbance

Document Type : Original Article

Authors

1 University of Jaén, 23700 EPS Linares, Jaén, Spain.

2 Department of Electrical Engineering, Faculty of Engineering, Aswan University, 81542 Aswan, Egypt.

3 Department of Electrical Engineering, University of Jaén, 23700 EPS Linares, Jaén, Spain.

Abstract

The continuous increase in the pollution level and fuel price lead to increase the using of renewable energy sources especially wind energy. Due to the increase in wind energy penetration into electrical grid, installing wind farms faces many challenges. Continuity of wind farms connection to grid or at least reconnected after clearance of grid faults is
important challenge. To overcome these challenges Flexible AC transmission systems (FACTS) elements are used as auxiliary equipment. This paper studies the impact of static var compensator (SVC) as one of FACTS family members on voltage stability of hybrid wind farm (HWF) during some grid disturbance such as over voltage, voltage sage, single to ground fault and three phase faults. This hybrid wind farm is consisting of an equal number of Squirrel Cage Induction Generator (SCIG) and Double Fed Induction Generator (DFIG). With this combination, the main benefits of SCIG and
DFIG are collected. Where, SCIG is considered cheap with great effect on system stability especially when it operates without shunt compensator while DFIG can be operated with more stability contributes in the stability of interconnected grid. But DFIG is considered very expensive comparing with SCIG. The current paper presents a comprehensive comparison of recent hybrid wind farm with and without SVC during different types of grid disturbance. All test cases are carried out using MATLAB SIMULINK program.

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