# US 9,882,454 B2 · Application of combined probabilistic control in gas turbine tuning for power output-emissions parameters with scaling factor, related control systems, computer program products and methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,882,454 B2 - Document ID: US9882454B2 - Status: Granted - Kind: B2 - Application number: 14/971,736 - Filed: 2015-12-16 - Published: 2017-06-22 - Granted: 2018-01-30 - Earliest claimed: 2015-12-16 - Assignees: General Electric Company - Applicants: General Electric Company - Inventors: Lewis Berkley Davis, Jr.; Scott Arthur Day; Harold Lamar Jordan, Jr.; Rex Allen Morgan - Web page: https://patentgrep.com/patent/US9882454B2 ## CPC - H02K 7/1823: {structurally associated with turbines or similar engines} - F02C 9/00: Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants (controlling air intakes F02C7/057; controlling turbines F01D; controlling compressors F04D27/00; controlling in general G05) - F02C 9/28: Regulating systems responsive to plant or ambient parameters, e.g. temperature, pressure, rotor speed (F02C9/30 - F02C9/38, F02C9/44 take precedence) - G05B 13/021: {in which a variable is automatically adjusted to optimise the performance} - G05B 13/041: {in which a variable is automatically adjusted to optimise the performance} - F05D 2240/40: Use of a multiplicity of similar components - F05D 2270/08: to produce clean exhaust gases - F05D 2270/0831: indirectly, at the exhaust - F05D 2270/335: Output power or torque - G05B 2219/39407: Power metrics, energy efficiency - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00) - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract Various embodiments include a system having: at least one computing device configured to tune a set of gas turbines (GTs) by performing actions including: commanding each GT in the set of GTs to a base load level, based upon a measured ambient condition for each GT; commanding each GT in the set of GTs to adjust a respective power output to match a scaled power output value equal to a fraction of a difference between the respective power output and a nominal power output value, and measuring an actual emissions value for each GT during the adjusting of the respective power output; and adjusting an operating condition of each GT in the set of GTs based upon a difference between the respective measured actual emissions value, a nominal emissions value at the ambient condition and a nominal emissions value at the ambient condition. ## Claims ### Claim 1 A computing system comprising: at least one computing device having at least one controller, the at least one computing device configured to tune each gas turbine in a set of a plurality of gas turbines based upon a power output parameter and an emissions parameter, wherein the at least one computing device is configured to: command each gas turbine in the set to a respective base load level based upon a respective measured ambient condition; command each gas turbine in the set to adjust a respective actual value of the power output parameter of each gas turbine in the set to match a respective scaled value of the power output parameter of each gas turbine in the set, wherein the respective scaled value of the power output parameter is equal to a fraction of a difference between the respective actual value of the power output parameter and a nominal value of the power output parameter of the set, and measure a respective actual value of the emissions parameter for each gas turbine in the set during the adjustment of the respective actual value of the power output parameter; and perform an adjustment to a respective operating parameter of each gas turbine in the set of based upon a respective scaled value of the emissions parameter of each gas turbine in the set, wherein the respective scaled value of the emissions parameter is equal to a product of an emissions scale factor multiplied by a difference between the respective actual value of the emissions parameter and a nominal value of the emissions parameter at the respective measured ambient condition for each gas turbine in the set, wherein the adjustment to the respective operating parameter of each gas turbine in the set aligns each gas turbine in the set onto a first line in a graphical space plotting the power output parameter versus the emissions parameter, wherein the first line is orthogonal to a characteristic line in the graphical space, wherein the characteristic line is a mean characteristic line of all of the plurality of gas turbines in the set, at the respective base load level of each gas turbine in the set, plotting the power output parameter versus the emissions parameter. ### Claim 2 (depends on 1) The computing system of claim 1, wherein the respective base load level is associated with a base load value of the power output parameter and a base load value of the emissions parameter for the respective measured ambient condition, and wherein the fraction is a power scale factor. ### Claim 3 (depends on 1) The computing system of claim 1, wherein in response to the command of each gas turbine in the set to the respective base load level, each gas turbine in the set does not attain at least one of: the nominal value of the power output parameter of the set and the nominal value of the emissions parameter at the respective measured ambient condition. ### Claim 4 (depends on 1) The computing system of claim 1, wherein the at least one computing device is further configured to convert the difference between the respective actual value of the emissions parameter and the nominal value of the emissions parameter at the respective measured ambient condition for each gas turbine in the set into a difference between a respective value of the power output parameter along the first line and the nominal value of the power output parameter of the set for each gas turbine in the set. ### Claim 5 (depends on 4) The computing system of claim 4, wherein the of adjustment to the respective operating parameter of each gas turbine in the set includes adjusting the operating parameter of each gas turbine in the set by a fraction of the difference between the respective value of the power output parameter along the first line and the nominal value of the power output parameter of the set, such that the power output parameter of each gas turbine in the set approaches and then reaches a respective nominal value of the power output parameter along the first line. ### Claim 6 (depends on 1) The computing system of claim 1, wherein the commanding of each gas turbine in the set to adjust the respective actual value of the power output parameter of each gas turbine in the set to match the respective scaled value of the power output parameter moves the emissions parameter for each gas turbine in the set closer to the nominal value of the emissions parameter at the respective measured ambient condition without matching the nominal value of the emissions parameter at the respective measured ambient condition. ### Claim 7 A computer program product comprising program code embodied in at least one non-transitory computer readable medium, which when executed by at least one computing device having at least one controller, causes the at least one computing device to tune each gas turbine in a set of a plurality of gas turbines based upon a power output parameter and an emissions parameter by: commanding each gas turbine in the set to a respective base load level based upon a respective measured ambient condition; commanding each gas turbine in the set to adjust a respective actual value of the power output parameter of each gas turbine in the set to match a respective scaled value of the power output parameter of each gas turbine in the set, wherein the respective scaled value of the power output parameter is equal to a fraction of a difference between the respective actual value of the power output parameter and a nominal value of the power output parameter of the set, and measuring a respective actual value of the emissions parameter for each gas turbine in the set during the adjusting of the respective actual value of the power output parameter; and adjusting a respective operating parameter of each gas turbine in the set based upon a respective scaled value of the emissions parameter of each gas turbine in the set, wherein the respective scaled value of the emissions parameter is equal to a product of an emissions scale factor multiplied by a difference between the respective actual value of the emissions, parameter and a nominal value of the emissions parameter at the respective measured ambient condition for each gas turbine in the set, wherein the adjusting of the respective operating parameter of each gas turbine in the set aligns each gas turbine in the set onto a first line in a graphical space plotting the power output parameter versus the emissions parameter, wherein the first line is orthogonal to a characteristic line in the graphical space, wherein the characteristic line is a mean characteristic line of all of the plurality of gas turbines in the set, at the respective base load level of each gas turbine in the set, plotting the power output parameter versus the emissions parameter. ### Claim 8 (depends on 7) The computer program product of claim 7, wherein the respective base load level is associated with a base load value of the power output parameter and a base load value of the emissions parameter for the respective measured ambient condition, and wherein the fraction is a power scale factor. ### Claim 9 (depends on 7) The computer program product of claim 7, wherein in response to the commanding of each gas turbine in the set to the respective base load level, each gas turbine in the set does not attain at least one of: the nominal value of the power output parameter of the set and the nominal value of the emissions parameter at the respective measured ambient condition. ### Claim 10 (depends on 7) The computer program product of claim 7, which when executed, causes the at least one computing device to convert the difference between the respective actual value of the emissions parameter and the nominal value of the emissions parameter at the respective measured ambient condition for each gas turbine in the set into a difference between a respective value of the power output parameter along the first line and the nominal value of the power output parameter of the set for each gas turbine in the set. ### Claim 11 (depends on 10) The computer program product of claim 10, wherein the adjusting of the respective operating parameter of each gas turbine in the set includes adjusting the operating parameter of each gas turbine in the set by a fraction of the difference between the respective value of the power output parameter along the first line and the nominal value of the power output parameter of the set, such that the power output parameter of each gas turbine in the set approaches and then reaches a respective nominal value of the power output parameter along the first line. ### Claim 12 (depends on 7) The computer program product of claim 7, wherein the commanding of each gas turbine in the set to adjust the respective actual value of the power output parameter of each gas turbine in the set to match the respective scaled value of the power output parameter moves the emissions parameter for each gas turbine in the set closer to the nominal value of the emissions parameter at the respective measured ambient condition without matching the nominal value of the emissions parameter at the respective measured ambient condition. ### Claim 13 computer-implemented method of tuning each gas turbine in a set of a plurality of gas turbines based upon a power output parameter and an emissions parameter, performed using at least one computing device having at least one controller, the computer-implemented method comprising: commanding each gas turbine in the set to a respective base load level based upon a respective measured ambient condition; commanding each gas turbine in the set to adjust a respective actual value of the power output parameter of each gas turbine in the set to match a respective scaled value of the power output parameter of each gas turbine in the set, wherein the respective scaled value of the power output parameter is equal to a fraction of a difference between the respective actual value of the power output parameter and a nominal value of the power output parameter of the set, and measuring a respective actual value of the emissions parameter for each gas turbine in the set during the adjusting of the respective actual value of the power output parameter; and adjusting a respective operating parameter of each gas turbine in the set based upon a respective scaled value of the emissions parameter of each gas turbine in the set, wherein the respective scaled value of the emissions parameter is equal to a product of an emissions scale factor multiplied by a difference between the respective actual value of the emissions parameter and a nominal value of the emissions parameter at the respective measured ambient condition for each gas turbine in the set, wherein the adjusting of the respective operating parameter of each gas turbine in the set aligns each gas turbine in the set onto a first line in a graphical space plotting the power output parameter versus the emissions parameter, wherein the first line is orthogonal to a characteristic line in the graphical space, wherein the characteristic line is a mean characteristic line of all of the plurality of gas turbines in the set, at the respective base load level of each gas turbine in the set, plotting the power output parameter versus the emissions parameter. ### Claim 14 (depends on 13) The computer-implemented method of claim 13, wherein the respective base load level is associated with a base load value of the power output parameter and a base load value of the emissions parameter for the respective measured ambient condition, and wherein the fraction is a power scale factor. ### Claim 15 (depends on 14) The computer-implemented method of claim 14, wherein in response to the commanding of each gas turbine in the set of to the respective base load level, each gas turbine in the set does not attain at least one of: the nominal value of the power output parameter of the set and the nominal value of the emissions parameter at the respective measured ambient condition. ### Claim 16 (depends on 15) The computer-implemented method of claim 15, further comprising converting the difference between the respective actual value of the emissions parameter and the nominal value of the emissions parameter at the respective measured ambient condition for each gas turbine in the set into a difference between a respective value of the power output parameter along the first line and the nominal value of the power output parameter of the set for each gas turbine in the set. ### Claim 17 (depends on 16) The computer-implemented method of claim 16, wherein the adjusting of the respective operating parameter of each gas turbine in the set includes adjusting the operating parameter of each gas turbine in the set by a fraction of the difference between the respective value of the power output parameter along the first line and the nominal value of the power output parameter of the set, such that the parameter of each gas turbine in the set approaches and then reaches a respective nominal value of the power output parameter along the first line. ### Claim 18 (depends on 13) The computer-implemented method of claim 13, wherein the commanding of each gas turbine in the set to adjust the respective actual value of the power output parameter of each gas turbine in the set to match the respective scaled value of the power output parameter moves the emissions parameter for each gas turbine in the set closer to the nominal value of the emissions parameter at the respective measured ambient condition without matching the nominal value of the emissions parameter at the respective measured ambient condition.