SVC station, to compensate for the circulation of reactive power on the electrical networks
Static compensators – SVC, improve:
- power transmission,
- distribution performance,
- reactive power control.
Inductors and capacitors are used to divert harmonic currents in the resistance where they are dissipated safely.
HVDC system, transmission of electricity in high-voltage direct current
In HVDC LCC (back to back / point to point), the converter stations are polluted with numerous harmonic distortions which must then be filtered: filter alternating current – AC and direct current – DC .
When the station is powered on HVDC VSC , the pre-insertion resistor limits the charging current of the capacitors and the cable. When the station stops, the DC cable remains charged (High capacity), the energy must be discharged into a resistor (cable discharge).
When VSC is connected to wind farms for example, if the AC grid is faulty and cannot receive power, the wind turbines must be slowed down (DC Chopper).