Inspec keywords: frequency control; power generation faults; power generation control; distributed power generation; decentralised control; observers; rotors; variable structure systems; mathematical analysis; power system state estimation; machine control; control system synthesis; power system restoration; asynchronous generators

Other keywords: state observer; decentralised control strategy; sliding mode frequency controller; DFIG; hybrid microgrid; doubly fed-induction generator; secondary frequency drop; virtual inertia control design; sliding mode VIC controller; pitch angle control; fast dynamic frequency regulation; load disturbance; dynamic mathematical model; rotor speed restoration

Subjects: Mathematical analysis; Frequency control; Control system analysis and synthesis methods; Multivariable control systems; Control of electric power systems; Asynchronous machines; Mathematical analysis; Distributed power generation; Power system management, operation and economics