A system for controlling a bipolar DC power system, the bipolar DC power system comprising a positive conductor, a neutral conductor and negative conductor, wherein 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, wherein the system comprises control means for controlling the positive pole-to-neutral voltage and the negative pole-to-neutral voltage, wherein the control means comprises: 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; and a second voltage converter, wherein, if the first voltage converter is configured to control the sum of the positive pole-to-neutral voltage and the negative pole-to-neutral voltage, then the second voltage converter is configured to control the positive pole-to-neutral voltage, the negative pole-to-neutral voltage, or the difference of the positive pole-to-neutral voltage and the negative pole-to-neutral voltage, and wherein if the first voltage converter is configured to control the difference of the positive pole-to-neutral voltage and the negative pole-to-neutral voltage, then the second voltage converter is configured to control the positive pole-to-neutral voltage, the negative pole-to-neutral voltage, or the sum of the positive pole-to-neutral voltage and the negative pole-to-neutral voltage, and characterized in that the first and second voltage converter are configured for controlling a voltage by controlling the voltage as a function of a respective output current or power by determining per converter a setpoint voltage in dependence upon the respective output current or power value, and by maintaining per converter the respective voltage at the setpoint value of the converter. wherein 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, wherein the system comprises control means for controlling the positive pole-to-neutral voltage and the negative pole-to-neutral voltage, wherein the control means comprises: 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; and a second voltage converter, wherein, if the first voltage converter is configured to control the sum of the positive pole-to-neutral voltage and the negative pole-to-neutral voltage, then the second voltage converter is configured to control the positive pole-to-neutral voltage, the negative pole-to-neutral voltage, or the difference of the positive pole-to-neutral voltage and the negative pole-to-neutral voltage, and wherein if the first voltage converter is configured to control the difference of the positive pole-to-neutral voltage and the negative pole-to-neutral voltage, then the second voltage converter is configured to control the positive pole-to-neutral voltage, the negative pole-to-neutral voltage, or the sum of the positive pole-to-neutral voltage and the negative pole-to-neutral voltage, and characterized in that the first and second voltage converter are configured for controlling a voltage by controlling the voltage as a function of a respective output current or power by determining per converter a setpoint voltage in dependence upon the respective output current or power value, and by maintaining per converter the respective voltage at the setpoint value of the converter. 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; and a second voltage converter, wherein, if the first voltage converter is configured to control the sum of the positive pole-to-neutral voltage and the negative pole-to-neutral voltage, then the second voltage converter is configured to control the positive pole-to-neutral voltage, the negative pole-to-neutral voltage, or the difference of the positive pole-to-neutral voltage and the negative pole-to-neutral voltage, and wherein if the first voltage converter is configured to control the difference of the positive pole-to-neutral voltage and the negative pole-to-neutral voltage, then the second voltage converter is configured to control the positive pole-to-neutral voltage, the negative pole-to-neutral voltage, or the sum of the positive pole-to-neutral voltage and the negative pole-to-neutral voltage, and characterized in that the first and second voltage converter are configured for controlling a voltage by controlling the voltage as a function of a respective output current or power by determining per converter a setpoint voltage in dependence upon the respective output current or power value, and by maintaining per converter the respective voltage at the setpoint value of the converter.