Abstract: A control device for a plurality of distributed generators connected to a main grid, the control device including a load power measuring unit measuring power consumption of loads connected to the plurality of distributed generators, a distributed generator power measuring unit measuring power output from the plurality of distributed generators, a power flow reference value determining unit determining a power flow reference value of a power line connected to the main grid based on the power consumption and the power output from the plurality of distributed generators, and a mode control unit changing an operation mode of one of the plurality of distributed generators such that a flow power of the power line connected to the main grid maintains the power flow reference value.

Abstract: A electric power control device for a hybrid electric power system according to the present disclosure includes an electric power measuring unit that is configured to measure output electric power of the electric power system, and a controller that is configured to control operations of a first electric power generator and a second electric power generator of the electric power system based on a preset control mode and the measured output electric power, wherein the controller controls an output voltage of the first electric power generator to be a first offset voltage corresponding to an output of the second electric power generator for a first time when the output of the second electric power generator is controlled to be switched from an ON state into an OFF state.

Abstract: A method of controlling distributed power supplies is provided. In the method of controlling one or more distributed power supplies included in a microgrid, as a feeder flow control mode, an operation mode of a first distributed power supply is set, which is firstly connected to a common coupling point of the microgrid and a main grid. A second distributed power supply is selected, which is different from the first distributed power supply. A next operation mode of the second distributed power supply is determined on a basis of a current operation mode of the selected second distributed power supply and output power of the first distributed power supply. The next operation mode of the second distributed power supply is set as one of the feeder flow control mode or a unit power control mode according to the determined result.

Abstract: A electric power control device for a hybrid electric power system according to the present disclosure includes an electric power measuring unit that is configured to measure output electric power of the electric power system, and a controller that is configured to control operations of a first electric power generator and a second electric power generator of the electric power system based on a preset control mode and the measured output electric power, wherein the controller controls an output voltage of the first electric power generator to be a first offset voltage corresponding to an output of the second electric power generator for a first time when the output of the second electric power generator is controlled to be switched from an ON state into an OFF state.

Abstract: A control device for distributed generators connected to a power main grid includes: a load power measuring unit measuring power consumption of loads connected to the plurality of distributed generators; a distributed generator power measuring unit measuring powers outputted from the plurality of distributed generators; a power flow reference value determining unit determining a power flow reference value of a power line connected to the main grid based on the power consumption and the distributed generator output power; and a mode control unit changing the operation mode of at least one of the plurality of distributed generators such that the flow power of the power line connected to the main grid maintains the reference value.