Patent ID: 8319480

Claim:
A power control apparatus in a power generation system including a generator generating power, the power control apparatus being connected to a power converter to control power, the power converter including a converter converting an alternating current into a direct current, an inverter converting a direct current into an alternating current and a direct current capacitor being connected to the converter and the inverter in parallel, the power control apparatus comprising: a voltage comparator configured to calculate an error voltage, based on a difference between a voltage measured at the direct current capacitor and a rated voltage of the direct current capacitor; a controlling unit configured to calculate a real power value by receiving the error voltage and output an output switch driving signal corresponding to the calculated real power value; a switch configured to be operated by the switch driving signal; and a resistance device coupled to the switch to consume an error current corresponding to the error voltage, wherein the error current is a current being received from the direct current capacitor.