From: Frequency control of a wind-diesel system based on hybrid energy storage
Operation case | Case1 | Case 2 | Case 3 | Case 4 | Case 5 |
---|---|---|---|---|---|
Step load disturbance | 0.3p.u | Â | Â | Â | Â |
(t = 0 s) | – | 0.1p.u |  |  |  |
(t = 0 s)/ 0.05p.u |  |  |  |  |  |
(t = 0 s) | Random | 0.05p.u |  |  |  |
(t = 0 s) |  |  |  |  |  |
Step wind disturbance | 2Â m/s | Â | Â | Â | Â |
(t = 90 s) | 2 m/s |  |  |  |  |
(t = 0 s) | – | Random | 15 m/s |  |  |
(t = 7 s) |  |  |  |  |  |
Maximum frequency deviation (Hz) | 0.121 | 0.017 | 0.030 | 0.082 | 0.025 |
Maximum stability | Â | Â | Â | Â | Â |
Recovery time(s) | 2.21 | 0.90 | 1.63 | – | 1.51 |