Review Article
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 |
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