Ancillary Services in Microgrids During Islanded Operation Mahdi Izadkhast
Learning Objectives • What are the most important services for microgrids during islanded mode? • How are the frequency and voltage support controlled during islanded mode? • What is the islanding process?
Islanded Mode
Frequency Support
Frequency Control
Frequency Control f t Safe operation of island system f min 1 f Loads are disconnected min 2 Loads Are more disconnected f min 3 Island system is shut down
Frequency Control f t Safe operation of island system f min 1 Small fraction of loads disconnected f Loads are disconnected min 2 Loads Are more disconnected f min 3 Island system is shut down
Frequency Control f t Safe operation of island system f min 1 A fraction of loads disconnected f Loads are disconnected min 2 Loads Are more disconnected Additional fraction of loads disconnected f min 3 Island system is shut down
Frequency Control f t Safe operation of island system f min 1 Small fraction of loads disconnected f Loads are disconnected min 2 Loads Are more disconnected Larger fraction of loads disconnected f min 3 Island system is shut down
Frequency Control f Island system is shut down f max 2 Loads are connected f max 1 Safe operation of island system t
Frequency Control f Island system is shut down f max 2 Loads are connected f max 1 Safe operation of island system t
Frequency Control f Island system is shut down f max 2 Loads are connected f max 1 Safe operation of island system t
Voltage Control
Black Start
Islanding
Summary
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