Control of rolling or moving average values of air pollution control emissions to a desired value
First Claim
1. A controller for directing operation of a system performing a process, having multiple process parameters (MPPs), at least one of the MPPs being a controllable process parameter (CTPP) and one of the MPPs being a targeted process parameter (TPP), and having a defined target value (DTV) representing a limit on an actual average value (AAV) of the TPP over a defined moving time period of length TPLAAV, with the AAV computed based on actual values (AVs) of the TPP over the defined period, comprising:
- a storage medium configured to store historical data representing the AVs of the TPP at various times over a prior time period (PTP) having a length of at least TPLAAV and extending from a prior time of T−
AAV1 to a current time T0; and
a processor configured to (a) predict future average values (FAVs) of the TPP over a future time period (FTP) having a length of at least TPLAAV and extending from the current time T0 to a future time TAAV1, on or after which the TPP will move to steady state, wherein the FAVs of the TPP over the FTP are predicted based on (i) the stored historical data representing the AVs of the TPP at various times over the PTP and (ii) the current values of the MPPs, (b) determine a target set point for each CTPP based on (i) the predicted FAVs of the TPP over the FTP, (ii) the current values of the MPPs, and (iii) the DTV, and (c) direct control of each CTPP in accordance with the determined target set point for that CTPP.
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Accused Products
Abstract
A controller directs performance of a process having multiple process parameters (MPPs), including a controllable process parameter (CTPP), a targeted process parameter (TPP), a defined target value (DTV) representing a limit on an actual average value (AAV) of the TPP over a defined moving time period of length TPLAAV. A storage device stores historical data representing the AVs of the TPP at various times over a prior time period (PTP) having a length of at least TPLAAV. A processor predicts future average values (FAVs) of the TPP over a future time period (FTP) based on the stored historical data and the current values of the MPPs. The processor also determines a target set point for each CTPP based on the predicted FAVs, the current values of the MPPs and the DTV, and directs control of each CTPP in accordance with the determined target set point for that CTPP.
98 Citations
18 Claims
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1. A controller for directing operation of a system performing a process, having multiple process parameters (MPPs), at least one of the MPPs being a controllable process parameter (CTPP) and one of the MPPs being a targeted process parameter (TPP), and having a defined target value (DTV) representing a limit on an actual average value (AAV) of the TPP over a defined moving time period of length TPLAAV, with the AAV computed based on actual values (AVs) of the TPP over the defined period, comprising:
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a storage medium configured to store historical data representing the AVs of the TPP at various times over a prior time period (PTP) having a length of at least TPLAAV and extending from a prior time of T−
AAV1 to a current time T0; anda processor configured to (a) predict future average values (FAVs) of the TPP over a future time period (FTP) having a length of at least TPLAAV and extending from the current time T0 to a future time TAAV1, on or after which the TPP will move to steady state, wherein the FAVs of the TPP over the FTP are predicted based on (i) the stored historical data representing the AVs of the TPP at various times over the PTP and (ii) the current values of the MPPs, (b) determine a target set point for each CTPP based on (i) the predicted FAVs of the TPP over the FTP, (ii) the current values of the MPPs, and (iii) the DTV, and (c) direct control of each CTPP in accordance with the determined target set point for that CTPP. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for directing operation of a process having multiple process parameters (MPPs), at least one of the MPPs being a controllable process parameter (CTPP) and one of the MPPs being a targeted process parameter (TPP), and having a defined target value (DTV) representing a regulatory limit on an actual average value (AAV) of the TPP over a defined moving time period of length TPLAAV, with the AAV computed based on actual values (AVs) of the TPP over the defined period, comprising:
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storing historical data representing the AVs of the TPP at various times over a prior time period (PTP) having the length TPLAAV and extending from a prior time of T−
AAV1 to a current time T0;predicting future average values (FAVs) of the TPP over a future time period (FTP) having the length of at least TPLAAV and extending from the current time T0 to a future time TAAV1, on or after which the TPP will move to steady state, wherein the FAVs of the TPP over the FTP are predicted based on (i) historical data representing the AVs of the TPP at various times over the PTP and (ii) the current values of the MPPs; determining a target set point for each CTPP based on (i) the predicted FAVs of the TPP over the FTP, (ii) the current values of the MPPs, and (iii) the DTV; and directing control of each CTPP in accordance with the determined target set point for that CTPP. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification