Apparatus for and method of monitoring and controlling a power system
First Claim
1. An apparatus for monitoring a power system having an alternating current bus which includes at least one line, a neutral, and a ground, said apparatus comprising:
- a module coupled to the bus for digitizing at least one of a voltage waveform and a current waveform present on the bus and modulating the digitized waveform onto a carrier; and
means coupled to the bus for demodulating the digitized waveform and for calculating a parameter selected from the group consisting of average current, root mean square current, peak current, current crest factor, average voltage, root mean square voltage, peak voltage, voltage crest factor, voltage surge, current waveform shape, voltage waveform shape, current waveform harmonic structure, voltage waveform harmonic structure and combinations thereof.
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Accused Products
Abstract
A apparatus for monitoring and controlling a power system having an alternating current bus. The apparatus includes a module which is coupled to the bus and which digitizes and modulates at least one of a voltage waveform and a current waveform present on the bus. A control unit which is also coupled to the bus demodulates the digitized waveform and calculates a parameter selected from the group consisting of average current, root mean square current, peak current, current crest factor, average voltage, root mean square voltage, peak voltage, voltage crest factor, voltage surge, current waveform shape, voltage waveform shape, current waveform harmonic structure, voltage waveform harmonic structure and combinations thereof. The calculated parameter is used to monitor conditions on the bus and control loads connected to modules of the system.
20 Citations
28 Claims
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1. An apparatus for monitoring a power system having an alternating current bus which includes at least one line, a neutral, and a ground, said apparatus comprising:
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a module coupled to the bus for digitizing at least one of a voltage waveform and a current waveform present on the bus and modulating the digitized waveform onto a carrier; and means coupled to the bus for demodulating the digitized waveform and for calculating a parameter selected from the group consisting of average current, root mean square current, peak current, current crest factor, average voltage, root mean square voltage, peak voltage, voltage crest factor, voltage surge, current waveform shape, voltage waveform shape, current waveform harmonic structure, voltage waveform harmonic structure and combinations thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 22, 23)
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15. A method of monitoring a power system having an alternating bus which includes at least one line, a neutral, and a ground, said method comprising the steps of:
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rectifying at least one of a voltage waveform and a current waveform present on the bus; digitizing the rectified waveform; transmitting the digitized waveform to a control unit; and calculating a parameter selected from the group consisting of average current, root mean square current, peak current, current crest factor, average voltage, root mean square voltage, peak voltage, voltage crest factor, voltage surge, current waveform shape, voltage waveform shape, current waveform harmonic structure, voltage waveform harmonic structure, and combinations thereof. - View Dependent Claims (16, 17, 18, 19, 20, 21, 24)
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25. An apparatus for monitoring a power system having an alternating current bus which includes at least one line, a neutral, and a ground, said apparatus comprising:
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a module coupled to the bus for digitizing at least one of a voltage waveform and a current waveform present on the bus at the module and modulating the digitized waveform onto a carrier; and means coupled to the bus for demodulating the digitized waveform and for calculating a power system parameter using the digitized waveform.
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26. A method of monitoring a power system having an alternating bus which includes at least one line, a neutral, and a ground, said method comprising the steps of:
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rectifying at least one of a voltage waveform and a current waveform present on the bus at a module; digitizing the rectified waveform; transmitting the digitized waveform to a control unit; and calculating a power system parameter by the control unit using the digitized waveform.
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27. An apparatus for monitoring a power system having an alternating current bus which includes at least one line, a neutral, and a ground, said apparatus comprising:
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a module coupled to the bus for digitizing a voltage waveform and a current waveform present on the bus at the module and modulating the digitized waveform onto a carrier in response to a control unit signal; and control unit coupled to the bus for transmitting the control unit signal and demodulating the digitized waveform. - View Dependent Claims (28)
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Specification