Mathematical Problems in Engineering / 2014 / Article / Fig 9

Research Article

The Virtual Resistance Control Strategy for HVRT of Doubly Fed Induction Wind Generators Based on Particle Swarm Optimization

Figure 9

Rotor current, voltage with variable damping control in subsynchronization.
350367.fig.009a
(a) Rotor current and voltage with 0.5 pu virtual resistance
350367.fig.009b
(b) Rotor current and voltage with 1.5 pu virtual resistance