SYSTEM AND METHOD FOR CONTROLLING THE VOLTAGE OF BIPOLAR DC POWER SYSTEMS

A system for controlling a bipolar DC power includes a positive conductor, a neutral conductor and negative conductor. A positive pole-to-neutral voltage is a voltage between the positive conductor and the neutral conductor and a negative pole-to-neutral voltage is a voltage between the negative conductor and the neutral conductor. The system comprises control means for controlling the positive pole-to-neutral voltage and the negative pole-to-neutral voltage. The control means includes a first voltage converter configured to control a sum or difference of the positive pole-to-neutral voltage and the negative pole-to-neutral voltage, respectively as a function of the sum or difference of the positive output current and negative output current, and a second voltage converter.