Table 2 Parameters of the hybrid multi-terminal HVDC system
Parameter | Value |
|---|---|
MMC rating capacity | 400 MVA |
LCC rating capacity | 800 MVA |
Rated voltage of the DC side | 400 kV |
Smoothing Reactor (LCC) | 300 mH |
Smoothing Reactor (MMC) | 100 mH |
AC system voltage (LCC) | 230 kV |
Transformation ratio (LCC) | 525/210 kV |
AC voltage (MMC) | 353 kV |
Transformation ratio (MMC) | 230/260 kV |
Short-circuit impedance | 18% |
NHB /NFB | 100/100 |
Inductance of arm | 40 mH |
Capacitance of arm | 25 mF |
DC line length | 500 km |
Sampling frequency | 10 kHz |
Time of the failure | 1 s |