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US 5,689,177 AGranted
Method and apparatus to regulate a voltage controller
AssigneeThe Babcock & Wilcox Company
InventorsMichael H. Nielsen, Alan D. Berger, Vinton P. Coffman
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AssigneeThe Babcock & Wilcox Company
InventorsMichael H. Nielsen, Alan D. Berger, Vinton P. Coffman
Estimating the term…
The present invention is directed to an automatic voltage controller for an electrostatic precipitator. The invention maintains a database of operating parameters, such as the firing angle of the silicon controlled rectifiers, during previous breakdowns. The data is used for statistical analysis of the process conditions of the precipitator, enabling the invention to more accurately predict the breakdown level of the system, and providing tolerance of erratic or atypical breakdowns. The invention assembles a "rolling" data set of a predetermined number of previous breakdowns from which the invention continuously extracts a mean value and a standard deviation value, which are used to determine the setback level and the ramp level.
A method of controlling electrical power in a device subject to electrical breakdowns, comprising the steps of:
An automatic voltage controller for controlling electrical power in a device subject to electrical breakdowns, comprising:
A method of controlling electrical power in a device subject to electrical breakdowns, comprising the steps of:
Dependencies are inferred from the claim text.