Overload control of an electric power generation system
First Claim
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1. A control system for an electrical power generating system (EPGS) comprising:
- a calculating device for determining a calculated required voltage needed to sustain a measured current level of an electrical load with available power of an engine of the EPGS;
a voltage controller for controlling an output of a generator of the EPGS at a voltage that corresponds to the calculated required voltage, when electrical load on the EPGS exceeds the power of the engine; and
a voltage comparator for comparing a reference voltage and the calculated required voltage to provide a command voltage output that corresponds to the lower of the reference voltage and the calculated required voltage, whereinthe voltage comparator is interconnected with the voltage controller so that the output of the generator is controlled at the command voltage.
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Abstract
A control system for an electrical power generation system (EPGS) provides overload protection without disconnecting a generator of the EPGS from an excessive electrical load. Available engine power and current levels of the electrical load are continuously measured. A command voltage is calculated that corresponds to a voltage required to sustain with the maximum available power. Output voltage of a generator of the EPGS is controlled at the calculated command voltage so that a power limit of the engine is not exceeded during electrical overload conditions.
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Citations
13 Claims
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1. A control system for an electrical power generating system (EPGS) comprising:
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a calculating device for determining a calculated required voltage needed to sustain a measured current level of an electrical load with available power of an engine of the EPGS; a voltage controller for controlling an output of a generator of the EPGS at a voltage that corresponds to the calculated required voltage, when electrical load on the EPGS exceeds the power of the engine; and a voltage comparator for comparing a reference voltage and the calculated required voltage to provide a command voltage output that corresponds to the lower of the reference voltage and the calculated required voltage, wherein the voltage comparator is interconnected with the voltage controller so that the output of the generator is controlled at the command voltage. - View Dependent Claims (2, 3, 4)
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5. A control system for an electrical power generating system (EPGS), comprising:
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a calculating device for determining a calculated required voltage needed to sustain a measured current level of an electrical load with available power of an ermine of the EPGS; and a voltage controller for controlling an output of a generator of the EPGS at a voltage that corresponds to the calculated required voltage, when electrical load on the EPGS exceeds the power of the ermine, wherein; the calculating device is provided with current level signals from a power bus of the EPGS; the calculating device is provided with engine-power-available input signals; and the required voltage is determined by the calculating device with periodic calculations based on said input signals. - View Dependent Claims (6, 7, 8)
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9. A control system for an electrical power generating system (EPGS) comprising:
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a calculating device for determining a calculated required voltage needed to sustain a measured current level of an electrical load with available power of an engine of the EPGS; a voltage controller for controlling an output of a generator of the EPGS at a voltage that corresponds to the calculated required voltage, when electrical load on the EPGS exceeds the power of the ermine; a mechanical loss calculator; and an electrical loss calculator; wherein the loss calculators receive an engine shaft power signal and collectively produce an engine-power-available input signal to the calculating device. - View Dependent Claims (10, 11, 12, 13)
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Specification