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Photovoltaic Cell Simulator
In a similar application to leadless remote sensing, modulation enables the power supply to emulate different sources: such as batteries, fuel cells, photovoltaic arrays, etc. To simulate a photovoltaic array, connect terminal 24 of JS1 to terminal 25 of JS1, set the modulation control parameter to voltage control, and set the modulation type to 0. Figure 1 illustrates the IV characteristics for a typical photovoltaic array and Table 1 defines the associated piece-wise linear modulation table to emulate that array. For this example, a PQD125-53 power supply was chosen for the power source.
Figure 1. IV Characteristic for a Typical Photovoltaic Array
| Row | VMOD (Vdc) | Mod | Vo (Vdc) | Io (Adc) |
|---|---|---|---|---|
| 1 | 0.000 | 1.000 | 105 | 0.0 |
| 2 | 0.377 | 0.952 | 100 | 10.0 |
| 3 | 0.660 | 0.905 | 95 | 17.5 |
| 4 | 0.849 | 0.857 | 90 | 22.5 |
| 5 | 0.943 | 0.809 | 85 | 25.0 |
| 6 | 0.981 | 0.762 | 80 | 26.0 |
| 7 | 1.033 | 0.714 | 75 | 27.5 |
| 8 | 1.094 | 0.666 | 70 | 29.0 |
| 9 | 1.132 | 0.619 | 65 | 30.0 |
| 10 | 1.170 | 0.571 | 60 | 31.0 |
| 11 | 1.208 | 0.476 | 50 | 32.0 |
| 12 | 1.226 | 0.000 | 0 | 32.5 |
| 13 | 9999 | 0.000 |
Note: Set the program voltage to 105V.
Table 1. Modulation Table for Emulation of a Photovoltaic Array (Type 0)