Research Article
Bus Voltage Stabilization Control of Photovoltaic DC Microgrid Based on Fuzzy-PI Dual-Mode Controller
Table 3
Comparison of performance indexes under different controlling strategies.
| | PI controller | Fuzzy controller | Fuzzy-PI controller |
| Initial power-up | Adjustment time (s) | 0.4 | 0.2 | 0.2 | Voltage overshoot (V) | 2.5 | 0 | 0 | Steady-state error (V) | 0 | 0.8 | 0 |
| Load’s surge | Adjustment time (s) | 0.8 | 0.2 | 0.2 | Voltage variation (V) | 7.5 | 4.5 | 3.5 | Steady-state error (V) | 0 | 1.2 | 0 |
| Load’s sharp reduction | Adjustment time (s) | 0.8 | 0.2 | 0.2 | Voltage variation (V) | 1 | 0.5 | 0.3 | Steady-state error (V) | 0 | 0.8 | 0 |
|
|