Closed-loop control device for closed-loop control of a power assembly including an internal combustion engine and a generator having an operative drive connection to the internal combustion engine, closed-loop control arrangement having such a closed-loop control device, power assembly and method for closed-loop control of a power assembly

A closed-loop control arrangement for closed-loop control of a power assembly including an internal combustion engine and a generator having an operative drive connection to the internal combustion engine, the closed-loop control arrangement comprising:

• a closed-loop control device which is formed as a general controller, is for closed-loop control of the power assembly, and includes:
• a power controller which is configured for:
• detecting a generator power (PG) of the generator as a controlled variable;
• determining a power control deviation (eP) as a difference between the generator power (PG) which is detected and a target generator power (Psoll);
• and
• determining a first preset variable as a manipulated variable for controlling the internal combustion engine as a function of the power control deviation (eP);
• a frequency controller which is configured for:
• detecting a generator frequency (fG) of the generator as a controlled variable;
• determining a frequency control deviation (ef) as a difference between the generator frequency (fG) which is detected and a target generator frequency (fsoll);
• determining a second preset variable as a manipulated variable for controlling the internal combustion engine as a function of the frequency control deviation (ef);
• and
• a switchover module which is configured for:
• using, in a first functional state of the switchover module, the first preset variable as a control preset variable for controlling the internal combustion engine;
• using, in a second functional state of the switchover module, the second preset variable as the control preset variable for controlling the internal combustion engine;
• wherein the power controller and the frequency controller are configured for calculating at least one controller component for a respectively assigned preset variable during operation of the closed-loop control device, independently of a current functional state of the switchover module;
• and
• an open-loop control device operatively connected to the closed-loop control device for direct control of the internal combustion engine, the closed-loop control device being configured for transmitting the control preset variable to the open-loop control device.

A power assembly, comprising:

• an internal combustion engine;
• a generator including an operative drive connection to the internal combustion engine;
• and
• one of:
• (a) a closed-loop control device for closed-loop control of the power assembly, the closed-loop control device including:
• a power controller which is configured for:
• detecting a generator power (PG) of the generator as a controlled variable;
• determining a power control deviation (eP) as a difference between the generator power (PG) which is detected and a target generator power (Psoll);
• and
• determining a first preset variable as a manipulated variable for controlling the internal combustion engine as a function of the power control deviation (eP);
• a frequency controller which is configured for:
• detecting a generator frequency (fG) of the generator as a controlled variable;
• determining a frequency control deviation (ef) as a difference between the generator frequency (fG) which is detected and a target generator frequency (fsoll);
• determining a second preset variable as a manipulated variable for controlling the internal combustion engine as a function of the frequency control deviation (ef);
• and
• a switchover module which is configured for:
• using, in a first functional state of the switchover module, the first preset variable (16) as a control preset variable for controlling the internal combustion engine;
• using, in a second functional state of the switchover module, the second preset variable as the control preset variable for controlling the internal combustion engine;
• wherein the power controller and the frequency controller are configured for calculating at least one controller component for a respectively assigned preset variable during operation of the closed-loop control device, independently of a current functional state of the switchover module;
• and
• (b) a closed-loop control arrangement for closed-loop control of the power assembly, the closed-loop control arrangement including:
• a closed-loop control device which is formed as a general controller, is for closed-loop control of the power assembly, and includes:
• a power controller which is configured for:
• detecting a generator power (PG) of the generator as a controlled variable;
• determining a power control deviation (eP) as a difference between the generator power (PG) which is detected and a target generator power (Psoll);
• and
• determining a first preset variable as a manipulated variable for controlling the internal combustion engine as a function of the power control deviation (eP);
• a frequency controller which is configured for:
• detecting a generator frequency (fG) of the generator as a controlled variable;
• determining a frequency control deviation (ef) as a difference between the generator frequency (fG) which is detected and a target generator frequency (fsoll);
• determining a second preset variable as a manipulated variable for controlling the internal combustion engine as a function of the frequency control deviation (ef);
• a switchover module which is configured for:
• using, in a first functional state of the switchover module, the first preset variable as a control preset variable for controlling the internal combustion engine;
• using, in a second functional state of the switchover module, the second preset variable as the control preset variable for controlling the internal combustion engine;
• wherein the power controller and the frequency controller are configured for calculating at least one controller component for a respectively assigned preset variable during operation of the closed-loop control device, independently of a current functional state of the switchover module;
• and
• an open-loop control device operatively connected to the closed-loop control device for direct control of the internal combustion engine, the closed-loop control device being configured for transmitting the control preset variable to the open-loop control device;
• wherein the closed-loop control device or the closed-loop control arrangement is operatively connected to the internal combustion engine and the generator of the power assembly.

A method for closed-loop control of a power assembly including an internal combustion engine and a generator having an operative drive connection to the internal combustion engine, the method comprising the steps of:

• detecting a generator power (PG) of the generator as a controlled variable;
• determining a power control deviation (eP) as a difference between the generator power (PG) which is detected and a target generator power (Psoll);
• determining a first preset variable as a manipulated variable for controlling the internal combustion engine as a function of the power control deviation (eP);
• detecting a generator frequency (fG) of the generator as a controlled variable;
• determining a frequency control deviation (ef) as a difference between the generator frequency (fG) which is detected and a target generator frequency (fsoll);
• determining a second preset variable as a manipulated variable for controlling the internal combustion engine as a function of the frequency control deviation (ef);
• using, in a first functional state, the first preset variable as a control preset variable for controlling the internal combustion engine;
• using, in a second functional state, the second preset variable as a control preset variable for controlling the internal combustion engine;
• calculating at least one controller component for the first preset variable and for the second preset variable, independently of the current functional state.