Method and device for operating a generator set, internal combustion engine, and generator set including the internal combustion engine and a generator

A device for operating a generator set with respect to a power grid operated at a grid voltage, the generator set including a generator, an internal combustion engine, and a generator set controller, the device comprising:

• a generator sensor system configured for specifying a generator voltage frequency and a generator voltage phase of a generator voltage which is generated by the generator and to which are assigned the generator voltage frequency and the generator voltage phase;
• a grid sensor configured for specifying the grid voltage to which a grid frequency and a grid voltage phase are assigned;
• a control and regulating device configured for synchronizing the generator voltage with respect to the grid voltage, the control and regulating device being configured for carrying out a method for operating the generator set with respect to the power grid operated at the grid voltage, the method including the steps of:
• providing that the generator set includes the generator, the internal combustion engine, and the generator set controller, the internal combustion engine including an engine, an electronic control unit, and a combustion actuator which is control-connected to the electronic control unit and which is configured for being controlled using a combustion control variable for a torque-forming combustion adjustment of the engine, the generator being configured such that the generator, at a generator rotational speed, is drive-connected to the engine, at an engine rotational speed, so as to generate the generator voltage at the generator voltage frequency at the generator, the grid voltage having assigned thereto the grid frequency and the grid voltage phase, the generator voltage having assigned thereto the generator voltage frequency and the generator voltage phase;
• operating in a synchronized manner the generator set with respect to the power grid, the step of operating in the synchronized manner including the steps of:
• synchronizing the generator voltage with respect to the grid voltage;
• matching at least one of the generator voltage frequency and the generator voltage phase of the generator voltage generated by the generator with respect to at least one of the grid frequency and the grid voltage phase;
• operating the generator set in a synchronization mode so as to synchronize the generator voltage phase with the grid voltage phase, and the engine of the internal combustion engine being adjusted during operation;
• operating the engine of the internal combustion engine in a phase control mode with adjustment of an engine phase to change the generator voltage phase;
• transmitting the grid voltage phase to a phase regulator, the electronic unit being an engine control unit, which includes the phase regulator;
• regulating, by the phase regulator, the engine phase to a phase difference, which is formed by a difference between the generator voltage phase and the grid voltage phase;
• and
• setting a phase parameter formed as the combustion control variable for a torque-forming combustion setting of the engine, so as to adjust the engine phase subject to the phase difference, wherein at least one of the generator voltage frequency and the generator voltage phase for determining the phase difference is calculated—and thus not sensed—from at least one of the engine phase and the engine rotational speed of the engine of the internal combustion engine.

A generator set, which is configured for being operated with respect to a power grid operated at a grid voltage, the generator set comprising:

• an internal combustion engine, the internal combustion engine including an engine, an electronic control unit, and a combustion actuator which is control-connected to the electronic control unit and which is configured for being controlled using a combustion control variable for a torque-forming combustion adjustment of the engine;
• a generator, the generator being configured such that the generator, at a generator rotational speed, is drive-connected to the engine, at an engine rotational speed, so as to generate a generator voltage at a generator voltage frequency at the generator, the grid voltage having assigned thereto a grid frequency and a grid voltage phase, the generator voltage having assigned thereto the generator voltage frequency and a generator voltage phase, the generator being configured such that at least one of the generator voltage frequency and the generator voltage phase of the generator voltage generated by the generator being adapted with respect to at least one of the grid frequency and the grid voltage phase;
• a generator set controller;
• and
• a device configured for operating the generator set with respect to the power grid operated at the grid voltage,
• wherein:
• the generator set is configured for synchronized operation with respect to the power grid so as to synchronize the generator voltage with respect to the grid voltage,
• the generator set is configured for being operated in a synchronization mode for synchronizing the generator voltage phase with the grid voltage phase,
• the engine of the internal combustion engine is configured for being adjusted during operation,
• the engine of the internal combustion engine is configured for being operated in a phase control mode by adapting an engine phase to change the generator voltage phase,
• the generator set includes a phase regulator and is configured such that the grid voltage phase is transmitted to the phase regulator,
• the phase regulator is configured for regulating the engine phase to a phase difference which is formed from a difference between the generator voltage phase and the grid voltage phase,
• the generator set is configured such that a phase parameter formed as the combustion control variable is set for a torque-forming combustion setting of the engine to adjust the engine phase subject to the phase difference,
• wherein the device includes:
• a generator sensor system configured for specifying the generator voltage frequency and the generator voltage phase of the generator voltage which is generated by the generator and to which are assigned the generator voltage frequency and the generator voltage phase;
• a grid sensor configured for specifying the grid voltage to which the grid frequency and the grid voltage phase are assigned;
• a control and regulating device configured for synchronizing the generator voltage with respect to the grid voltage, the control and regulating device being configured for carrying out a method for operating the generator set with respect to the power grid operated at the grid voltage, the method including the steps of:
• providing the generator set;
• operating in a synchronized manner the generator set with respect to the power grid, the step of operating in the synchronized manner including the steps of:
• synchronizing the generator voltage with respect to the grid voltage;
• matching at least one of the generator voltage frequency and the generator voltage phase of the generator voltage generated by the generator with respect to at least one of the grid frequency and the grid voltage phase;
• operating the generator set in the synchronization mode so as to synchronize the generator voltage phase with the grid voltage phase, and the engine of the internal combustion engine being adjusted during operation;
• operating the engine of the internal combustion engine in the phase control mode with adjustment of the engine phase to change the generator voltage phase;
• transmitting the grid voltage phase to the phase regulator, the electronic unit being an engine control unit, which includes the phase regulator;
• regulating, by the phase regulator, the engine phase to the phase difference (PD), which is formed by the difference between the generator voltage phase and the grid voltage phase;
• and
• setting the phase parameter formed as the combustion control variable for the torque-forming combustion setting of the engine, so as to adjust the engine phase subject to the phase difference, wherein at least one of the generator voltage frequency and the generator voltage phase for determining the phase difference is calculated—and thus not sensed—from at least one of the engine phase and the engine rotational speed of the engine of the internal combustion engine.