DYNAMIC PERFORMANCE OF INVERTER INTERFACED DISPERSED GENERATION

1
DYNAMIC PERFORMANCE OF INVERTER INTERFACED
DISPERSED GENERATION

• Dynamic simulations of MV systems under perturbed
  and faulted conditions

• Grid connected operation active/reactive power
  controller
• Island operation voltage/frequency controller

2
Comparison between static and rotating units
3-phase fault event
Static unit
Voltage sag event
Rotating unit
Static unit
3

• Grid connected operation
• Negligible contribution to fault currents
• Reduced stability and electromechanical problems
• No need to modify existing protection schemes

• Island operation
• At least one DG unit must perform V-f regulation
• Fast load tracking requires suitable energy
  storage
• High regulating current injection
• Need to develop suitable control strategies for
  load sharing and information exchange between
  groups