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Published bySusanti Yenny Yuwono Modified over 6 years ago
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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
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Comparison between static and rotating units
3-phase fault event 0.1 0.2 0.3 0.4 0.5 1 2 3 4 t [s] Current [p.u] Rotating unit Static unit Voltage sag event 0.5 1 1.5 2 2.5 3 t [s] Current [p.u] Rotating unit Static unit
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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
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