DC substation comprising: - a first terminal adapted to connect the DC substation to an AC electrical power grid ; - a plurality of second terminals adapted to provide or receive DC current to or from a respective load ; - a current supply chain comprising an AC electricity meter , an AC/DC converter , and a branching circuit , the AC/DC converter being electrically connected to the first terminal , the AC electricity meter being connected in series with the AC/DC converter , wherein the AC electricity meter is configured for measuring an electrical energy, and the branching circuit providing respectively one branch for each second terminal , each branch being connected to a DC terminal of the AC/DC converter ; - a plurality of determination devices ; the DC substation being characterized in that : - each branch comprises a determination device for determining a direct current in the respective branch , or - each branch except one is provided with a determination device for determining a direct current at least in each branch except one and a determination device is provided to measure the direct current between the branching circuit and the AC/DC converter ; the DC substation further comprising: - a voltage meter for determining the voltage at the branching circuit ; - a controller adapted to receive the measured values from the AC electricity meter , each determination device and the voltage meter and to determine, for each branch , the respective electrical energy consumption or production based on the received voltages, currents and electrical energy. - a first terminal adapted to connect the DC substation to an AC electrical power grid ; - a plurality of second terminals adapted to provide or receive DC current to or from a respective load ; - a current supply chain comprising an AC electricity meter , an AC/DC converter , and a branching circuit , the AC/DC converter being electrically connected to the first terminal , the AC electricity meter being connected in series with the AC/DC converter , wherein the AC electricity meter is configured for measuring an electrical energy, and the branching circuit providing respectively one branch for each second terminal , each branch being connected to a DC terminal of the AC/DC converter ; - a plurality of determination devices ; the DC substation being characterized in that : - each branch comprises a determination device for determining a direct current in the respective branch , or - each branch except one is provided with a determination device for determining a direct current at least in each branch except one and a determination device is provided to measure the direct current between the branching circuit and the AC/DC converter ; - each branch comprises a determination device for determining a direct current in the respective branch , or - each branch except one is provided with a determination device for determining a direct current at least in each branch except one and a determination device is provided to measure the direct current between the branching circuit and the AC/DC converter ; the DC substation further comprising: - a voltage meter for determining the voltage at the branching circuit ; - a controller adapted to receive the measured values from the AC electricity meter , each determination device and the voltage meter and to determine, for each branch , the respective electrical energy consumption or production based on the received voltages, currents and electrical energy. - a voltage meter for determining the voltage at the branching circuit ; - a controller adapted to receive the measured values from the AC electricity meter , each determination device and the voltage meter and to determine, for each branch , the respective electrical energy consumption or production based on the received voltages, currents and electrical energy. <EOS>