Coordinated Control Using Backstepping of DFIG-Based Wind Turbine for Frequency Regulation in High Wind Energy Penetrated System

Table 1

Simulation scenarios.

Scenarios	S1	S2	S3
Generation units 1, 2, and 3	C	C	C
Generation unit 4	C; no PFC	NC	NC
Wind farm	NC	C; no IC	C; only IC

C: connected; NC: nonconnected; PFC: primary frequency control; IC: inertial control.