|
| Parameter | Symbol | Value | Comment |
|
| Design choices | | | |
| Number of drivetrain groups | | | As considered in Section 3 |
| Number of cable pairs per drivetrain group | | | As considered in Section 3 |
|
| Rated values | | | |
| Rated voltage | | 8 kV | Same magnitude as in [5] |
| Rated power | | 5 MW | Considered kite scale |
| Rated current of one drivetrain | | 78.125 A | Eight drivetrain groups |
| Rated current of one drivetrain’s ground converter | | | Slightly overdimensioned For the sake of safety and as no weight constraints on ground |
|
| Filter capacitances | | | |
| Capacitors | | 10 μF | Same magnitude as in [5] |
|
| Parasitic resistances | | | |
| Ground wire resistance | | 0.1 Ω | Estimated |
| Resistance of one wire | | 1.1 Ω | Result from model and parameters in Appendix A with |
| Resistance of one cable shield | | 8.8 Ω | Result from model and parameters in Appendix A with |
| Tether wire resistance | R5# + R6# = R11# + R12# | | |
| Tether shield resistance | R8# + R9# | | |
| Resistance of parallel tether wires | R7# = R13# | | Only one cable pair per drivetrain group |
| Resistance of parallel tether shields | R10# | | One cable pair per drivetrain group |
| Resistance of other shields | Ro | | Six further drivetrain groups with two electrical cables each (one cable pair per drivetrain group); all shields are paralleled |
|
| Fuse ratings | | | |
| Fuse trigger current | | | Selected |
| Fuse timings | | 1 ms | Selected |
| | | | Selected |
|
| Kite converter control parameters | | | |
| Overvoltage turn-off threshold | | | Selected |
| Overvoltage re-turn-on threshold | | | Selected |
| Undervoltage turn-off threshold | | | Selected |
| Undervoltage re-turn-on threshold | | | Selected |
| Undervoltage turn-off threshold time | | | Slower than slowest fuse |
| Undervoltage turn-off threshold without time delay | | | Selected |
| Imbalance-voltage turn-off threshold | | | Selected |
| Imbalance-voltage re-turn-on threshold | | | Selected |
| Imbalance-voltage turn-off threshold time | | | Much slower than under-voltage turn-off threshold time |
|
| Grid converter control parameters | | | |
| Undervoltage turn-off threshold | | | Selected |
| Undervoltage re-turn-on threshold | | | Do not turn on again, after undervoltage turn-off |
| Undervoltage turn-off threshold time | | | Slower than kite converter |
| Set voltage of drivetrain group (a) | | | Set voltage is rated voltage |
| Set voltage of drivetrain group (b) | | | Set voltage is rated voltage, but with slight error simulated as slightly different set voltage |
| Voltage controller proportional gain | | | Rated current at 1% voltage error |
|
| UPSs | | | |
| UPS voltage source | U1# = U2# | | i.e., 90% of normal voltage |
|
| Faults | | | |
| Relative fault position | | | Consideration |
|
| Parameters for acceptance criteria | | | |
| Maximum wire steady-state current | | | Estimated requirement |
| Maximum shield steady-state current | | | Estimated requirement |
| Maximum wire voltage in tether | | | Estimated requirement (cf. discussion in Section 5.1), which is in accordance with in Table 7 |
|
