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access icon free Adaptive neuro-fuzzy controller for static VAR compensator to damp out wind energy conversion system oscillation

© The Institution of Engineering and Technology
Received 20/05/2012, Accepted 10/12/2012, Published

Wind shear and tower shadow produce a periodic pulse reduction in mechanical torque captured from wind energy resulting in wind energy conversion system (WECS) active power oscillations. In this study, an adaptive neuro-fuzzy controller for static VAR compensator, used in power networks integrated with WECS, is presented to address the torque oscillation problem. The proposed controller consists of a radial basis function neural network representing a third-order auto-regressive and moving average system model and performing the prediction, and a main controller with adaptive neuro-fuzzy inference system providing the damping signal. A modified two-area four-machine power network with WECS integration is applied to validate the proposed implementation, compared with conventional lead/lag compensation. Time-domain simulations prove that the proposed controller can provide a damping signal to improve the active power oscillation and system dynamic stability, influenced by torque oscillations under WECSs synchronised operating condition.

Inspec keywords: moving average processes; torque; power system dynamic stability; wind power plants; fuzzy control; power generation control; static VAr compensators; neurocontrollers

Other keywords: WECS active power oscillations; wind energy conversion system oscillation; WECS integration; third-order autoregressive-moving average system model; lead-lag compensation; WECS synchronised operating condition; radial basis function neural network; torque oscillation problem; periodic pulse reduction; mechanical torque; tower shadow; wind shear; adaptive neuro-fuzzy inference system; damping signal; time-domain simulation; torque oscillations; adaptive neuro-fuzzy controller; modified two-area four-machine power network; static VAR compensator; system dynamic stability

Subjects: Fuzzy control; Other topics in statistics; Other topics in statistics; Wind power plants; Other power apparatus and electric machines; Power system control; Control of electric power systems; Neurocontrol

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