| 摘要 |
PURPOSE:To eliminate a restriction in a parallel operation limited to power converters having the same rating and the same characteristics by estimating a parameter of a system and controlling with an optimum control parameter. CONSTITUTION:A system parameter calculator 121 detects an output current varying when output voltage and phase are varied based on variations in the output voltage and phases and a command applied from an output reference controller 122 to a voltage controller 116a and a phase sync controller 118a, and calculates parameters such as voltage, phase, impedance of a system based on it to estimate it. An output reference controller 122 obtains optimum control outputs of output voltage and phase from system parameter estimated data calculated by the calculator 121 and applies the output as a reference of control of the controllers 116a and 118a. Thus, a restriction in a parallel operation limited to power converters having the same rating and the same characteristics can be eliminated. |
