Continuously adjustable saturable reactor

A device for reactive power compensation in a high-voltage network having at least one phase conductor, the device comprising:

• at least one high-voltage connection configured for connection to the at least one phase conductor;
• a first core section and a second core section being part of a closed magnetic circuit;
• a first high-voltage winding surrounding said first core section and having a high-voltage end and a low-voltage side;
• a second high-voltage winding surrounding said second core section and connected in parallel with said first high-voltage winding, said second high-voltage winding having a high-voltage end and a low-voltage side;
• at least one saturation switching branch configured to saturate said first and second core sections and having controllable power semiconductor switches;
• a controller for controlling said controllable power semiconductor switches;
• said first and said second high-voltage winding are connected at said high-voltage end to said at least one high-voltage connection and connected at said low-voltage side to said at least one saturation switching branch;
• said at least one saturation switching branch having at least one two-pole submodule with a bridge circuit having said controllable power semiconductor switches and a DC voltage source, so that depending on an actuation of said controllable power semiconductor switches, said DC voltage source can either be connected in series to at least one of said first or second high-voltage windings or bypassed, said voltage source containing an energy storage unit;
• and
• a charging unit connected to said energy storage unit and said charging unit configured to charge said energy storage unit.

A device for reactive power compensation in a high-voltage network having at least one phase conductor, the device comprising:

• at least one high-voltage connection configured for connection to the at least one phase conductor;
• a first core section and a second core section being part of a closed magnetic circuit;
• a first high-voltage winding surrounding said first core section and having a high-voltage end and a low-voltage side;
• a second high-voltage winding surrounding said second core section and connected in parallel with said first high-voltage winding, said second high-voltage winding having a high-voltage end and a low-voltage side;
• at least one saturation switching branch configured to saturate said first and second core sections and having controllable power semiconductor switches;
• a controller for controlling said controllable power semiconductor switches;
• said first and said second high-voltage winding are connected at said high-voltage end to said at least one high-voltage connection and connected at said low-voltage side to said at least one saturation switching branch;
• said at least one saturation switching branch having at least one two-pole submodule with a bridge circuit having said controllable power semiconductor switches and a DC voltage source, so that depending on an actuation of said controllable power semiconductor switches, said DC voltage source can either be connected in series to at least one of said first or second high-voltage windings or bypassed, said voltage source containing an energy storage unit;
• and
• a vessel filled with an insulating fluid, wherein each of said first and second core sections, each of said first and second high-voltage windings and said at least one saturation switching branch is disposed in said vessel.