KETEP 세계에너지시장정보

1. An arrangement which is connectable to an alternating current (AC) power transmission system, the arrangement comprising: a static synchronous compensator device having a converter unit and an energy storage unit connected with the converter unit; a power absorption device; and a control device connected with the static synchronous compensator device and with the power absorption device, wherein the control device is configured to control the static synchronous compensator device to exchange power with the AC power transmission system, and to control the power absorption device in dependence of a state of charge of the energy storage unit and a state of the power transmission system, and wherein the control device is configured to determine whether or not there is a need to absorb active power from the AC power transmission system in excess of what the static synchronous compensator device is currently absorbing, and when determining that there is the need, control the power absorption device to dissipate active power, and wherein the power absorption device comprises a resistor unit and a current control unit connected in series with the resistor unit, wherein the control device, when controlling the power absorption device to dissipate active power, is configured to control the current control unit to provide current to the resistor unit.