Patent ID: 9698603
Date: 2017-07-04
CPC Classifications: B63J,H01M,H02J,H02M,Y02A,Y02E,Y02T

Claim:
1. A combined power generation system having a power converting apparatus in a power supply system provided with an electricity storage facility having an electricity storage device and a first power converter connected to the electricity storage device, a power generation facility having a power generating apparatus and a second power converter, connected to the power generating apparatus, for converting an electric power of the power generating apparatus into a predetermined AC power, the combined power generation system including a voltage measuring device for measuring a voltage of the power supply system and a frequency obtaining device for obtaining a frequency of the power supply system, the combined power generation system comprising: a first measuring device for measuring a value for obtaining an active power and a reactive power at an output terminal of the first power converter; a first system control device for controlling the first power converter; a second measuring device for measuring a value for obtaining an active power and a reactive power at an output terminal of the second power converter; and a second system control device for controlling the second power converter, wherein the first system control device includes a first active power command value calculator for proportioning and calculating a deviation between SOC of the electricity storage device and an SOC command value of the electricity storage device so as to calculate a first active power command value, a first frequency command value calculator having a first internal phase difference angle calculator for integrating a deviation between the first frequency command value and the frequency obtained by the frequency obtaining device so as to calculate a first internal phase difference angle, a first internal electromotive voltage command value calculator having a first current command value calculator for calculating a command value of an output current from the first power converter based on the first internal phase difference angle, the first internal electromotive voltage command value, and a voltage measured by the voltage measuring device, the first power converter is controlled based on an output from the first current command value calculator, the second system control device includes a second active power command value calculator for integrating a deviation between the frequency obtained by the frequency obtaining device and the frequency command value so as to calculate a second active power command value, a second frequency command value calculator having a second internal phase difference angle calculator for integrating a deviation between the second frequency command value and the frequency obtained by the frequency obtaining device so as to calculate a second internal phase difference angle, a second internal electromotive voltage command value calculator having a second current command value calculator for calculating a command value of an output current from the second power converter based on the second internal phase difference angle, the second internal electromotive voltage command value, and the voltage measured by the voltage measuring device, the second power converter is controlled based on an output from the second current command value calculator.