Control Method and System with an Inverter, a Direct Current Source, and an Additional Direct Current Source or a Direct Current Sink

A control method for a system, comprising the steps of:

• providing an inverter having a direct current connection, a direct current source, and at least one of an additional direct current source and a direct current sink, wherein the direct current source and the at least one of the additional direct current source and the direct current sink are connected in parallel to the direct current connection of the inverter;
• measuring at least one of:
• a voltage at the direct current connection of the inverter, by a voltage measuring device,
• a current flowing through the direct current connection, by a current measuring device,
• an output supplied to the inverter through the direct current connection, and
• an output supplied by the inverter through the direct current connection by an output detection unit,
• controlling an actuator, configured to adjust one or more parameters of the system, said parameters comprising:
• a voltage at the direct current source;
• a current supplied by the direct current source;
• an output supplied by the direct current source;
• a voltage at the direct current sink;
• a current drawn by the direct current sink;
• and
• an output supplied from the inverter through the direct current connection;
• to adjust said one or more parameters to maintain a predetermined value of at least one of said measured voltage value, said measured current value, and said detected output supplied to said inverter or said detected output supplied from said inverter.