access icon free Shunt reactive VAR compensator for grid-connected induction generator in wind energy conversion systems

This work presents the control design for compensating reactive power requirement of induction generator (IG) in wind generation systems using STATic COMpensator (STATCOM). A mathematical model of IG is developed in synchronously rotating d–q–0 axis. The STATCOM is realised using voltage source inverter for which the switching function model is derived and employed here. Instantaneous p–q theory and symmetrical components theory are considered for reference current generation. The current control uses an optimal proportional controller designed using linear quadratic regulator (LQR) approach. Comparative analysis is also made between hysteresis current control and LQR. Simulation and experimental results indicate that the suggested control techniques make the supply power factor close to unity.

Inspec keywords: linear quadratic control; wind power plants; asynchronous generators; proportional control; power generation control; power grids; power factor; control system synthesis; optimal control

Other keywords: voltage source inverter; power factor; synchronously rotating d–q–0 axis; current control; LQR; mathematical model; optimal proportional controller; control techniques; STATCOM; switching function model; static compensator; wind energy conversion systems; hysteresis current control; reference current generation; p–q theory; shunt reactive VAR compensator; control design; grid-connected induction generator; wind generation systems; reactive power requirement; symmetrical components theory; linear quadratic regulator

Subjects: Asynchronous machines; Optimal control; Wind power plants; Control of electric power systems

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