Method of and apparatus for detecting sensor loss in a generator control system
First Claim
1. A generator controller responsive to at least one voltage sensor for measuring a generator output voltage of a controlled generator controlled by the generator controller, wherein the generator controller is responsive to at least one current measuring device for measuring a generator output current, and wherein the generator controller is arranged to shut down the controlled generator if the measured generator output voltage is less than a first voltage threshold and the measured generator output current is less than a current threshold.
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Abstract
A generator controller (4) is provided which is able to detect and respond to failure of a generator output voltage sensor, whilst being able to distinguish voltage sensor failure from output voltage collapse due to the presence of an overload or short circuit condition. The presence of a voltage sensor failure is indicated by the measured output voltage being below a first voltage threshold whilst the output current is also below a current threshold.
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Citations
16 Claims
- 1. A generator controller responsive to at least one voltage sensor for measuring a generator output voltage of a controlled generator controlled by the generator controller, wherein the generator controller is responsive to at least one current measuring device for measuring a generator output current, and wherein the generator controller is arranged to shut down the controlled generator if the measured generator output voltage is less than a first voltage threshold and the measured generator output current is less than a current threshold.
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9. A generator controller arranged to detect failure of a first voltage sensor provided for measuring an output voltage of a generator, wherein the generator controller is responsive to a current sensor provided for measuring an output current of the generator and the generator controller detects that the first voltage sensor is not functioning correctly when the measured generator output voltage is less than a first voltage threshold and the measured output current is less than a current threshold.
- 10. A method of detecting voltage sensor failure of a generator control system having a first voltage sensor for measuring an output voltage of a generator, characterised by the steps of measuring an output current of the generator and determining the first voltage sensor to have failed if, during operation of the generator, the measured output voltage of the generator is less than a first voltage threshold and the measured generator output current is less than a current threshold.
Specification