A Review of Existing Microgrid Architectures

Table 2

Basic features of suitable storage devices in μG system [7].

Basic features	Battery	Flywheel	Supercapacitor
Continuous power (W/kg)	50–100	200–500	500–2000
Typical backup time	5–30 min	10–30 sec	10–30 sec
Losses at standby	Very low	Variable	High
Environmental impact	Medium-high	Low	Low
Maintenance	1/year	1/5 years	None
Charging efficiency (%)	75–95	90	85–95
Current energy price ($/kWh)	150–800	3000–4000	4000–5000
Service life (year)	5	20	>10