Voltage control system, fuel cell system, and control method for voltage control system

A control method for a voltage control system including a converter device including a reactor that accumulates an electrical energy, the converter device being configured to operate at a duty ratio determined as a ratio of an accumulation period in which the energy is input and accumulated into the reactor in one cycle, so as to increase an input voltage, the voltage control system being configured to output an output voltage obtained by increasing the input voltage according to a current target value, the control method comprising:

• setting the duty ratio according to the current target value so as to cause the converter device to repeatedly perform a boost operation, wherein
• the duty ratio is set by use of a basic term including a feedforward term, and an additional term, the feedforward term being derived by use of respective target values of a magnitude of an input of the reactor and a magnitude of an output of the reactor, the respective target values being set according to the current target value, the additional term being derived by use of a variation of the current target value during the one cycle and being added to change the duty ratio according to the variation.

A control method of a voltage control system including a converter device including a reactor that accumulates an electrical energy, the converter device being configured to operate at a duty ratio determined as a ratio of an accumulation period in which the energy is input and accumulated into the reactor in one cycle, so as to increase an input voltage, the voltage control system being configured to output an output voltage obtained by increasing the input voltage according to a current target value, the control method comprising:

• setting the duty ratio according to the current target value so as to cause the converter device to repeatedly perform a boost operation, wherein a magnitude of an input and a magnitude of an output in the reactor are measured, so that the duty ratio is set by use of a basic term including a feedforward term, and an additional term, the feedforward term being derived by use of a measured value of the magnitude of the input of the reactor and a measured value of the magnitude of the output of the reactor, the additional term being derived by use of a variation of the current target value during the one cycle and being added to change the duty ratio according to the variation.