System and method for improving the turndown capability of a combustion turbine

Abstract

To provide systems and methods for improving combustion turbine turndown capability.SOLUTION: Combustion turbine control systems are configured to operate combustion turbine systems in partial or no load while meeting emission targets. The combustion turbine system includes a combustion turbine, a combustion turbine controller, sensors, a catalyst assembly, and / or other relevant equipment. Based on given operating constraints, such as load conditions and emission regulations, the combustion turbine controller may execute corresponding actions to control certain gas concentrations and / or gas mass flows in exhaust gases in compliance with emission regulations.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] This disclosure generally relates to operating combustion turbines at a wide range of power outputs. More specifically, this disclosure relates to operating combustion turbines at partial load or no load while meeting emission targets. [Background technology]

[0002] A combustion turbine burns a mixture of compressed air and fuel to produce combustion gases. These combustion gases flow through one or more turbine stages, generating rotational energy for use by a load (such as a generator). The combustion gases include carbon monoxide (CO) and nitrogen oxides (NOx). x This can include various combustion by-products such as carbon dioxide (CO2). These by-products or emissions are generally subject to stringent regulations. In some cases, operating the combustion turbine in an extended power output range can increase the flexibility and efficiency of the power generation system. However, the cost of add-on emission control to meet emission targets while maintaining the extended power output range of the combustion turbine may become excessive.

[0003] This section is intended to introduce to the reader various aspects of the technique that may relate to the various aspects of the technique described and / or claimed below. This description is intended to be useful in providing the reader with background information to facilitate a better understanding of the various aspects of the disclosure. Therefore, it should be understood that these descriptions should be read in this context and not as an endorsement of any kind. [Overview of the project]

[0004] A summary of certain embodiments disclosed herein is provided below. These embodiments are presented solely to provide the reader with a brief overview of these specific embodiments, and should be understood as not intended to limit the scope of this disclosure. In fact, this disclosure may encompass a variety of embodiments not described below.

[0005] In a first embodiment, a method is provided. According to this method, an instruction that a combustion turbine should operate under a partial load condition or a no-load condition is received. In response to receiving the instruction, the combustion turbine is operated under the partial load condition or the no-load condition, thereby generating exhaust emissions. Increasing the combustion temperature in the combustion turbine from the partial load condition to the no-load condition is adopted, and while maintaining the exhaust gas temperature and exhaust emission profile at the minimum load condition where the combustion temperature does not rise, nitrous oxide (NO in the exhaust emissions x ) concentration is increased, and the concentration of carbon monoxide (CO) in the exhaust emissions is reduced.

[0006] In a second embodiment, a system is provided. The system includes a combustion turbine, a plurality of sensing devices, and a controller. The controller is configured to perform actions to control the gas concentration and gas mass flow rate in the exhaust gas according to emission targets. The actions include receiving an instruction that the combustion turbine should operate at a load lower than full load, and determining operating parameters corresponding to the load lower than full load. The actions also include operating the combustion turbine at a load lower than full load using the operating parameters. Based at least on operating at a load lower than full load, the combustion temperature in the combustion turbine is increased, the concentration of the first exhaust gas type is increased, and the concentration of the second exhaust gas type is reduced. The actions also include dynamically increasing the catalysis in the catalyst assembly used to treat the exhaust gas to meet the emission targets and compensate for the rise in combustion temperature while operating at a load lower than full load.

[0007] In the third embodiment, a system is provided. The system includes a combustion turbine, a plurality of sensing devices, a catalyst assembly, and a controller. The catalyst is configured to treat exhaust gas from the combustion turbine to meet emission targets. The controller is configured to perform actions that control the gas concentration and gas mass flow rate in the exhaust gas in accordance with the emission targets. The actions include receiving an instruction that the combustion turbine should operate under a part-load condition or a no-load condition, and determining an operating parameter corresponding to the part-load condition or the no-load condition based at least in part on the instruction. The actions also include operating the combustion turbine under the part-load condition or the no-load condition using the operating parameters. Based at least in part on the operation under the part-load condition or the no-load condition, the operation of the combustion turbine is adjusted. The actions further include dynamically increasing catalysis in the catalyst assembly to compensate for an increase in combustion temperature while operating under the part-load condition or the no-load condition. The actions further include measuring performance-related parameters of the combustion turbine using the plurality of sensing devices. Based at least in part on the performance-related parameters, the operation of the combustion turbine is adjusted while operating under the part-load condition or the no-load condition.

[0008] These and other features, aspects, and advantages of the present invention will be better understood when the following detailed description is read with reference to the accompanying drawings. In the accompanying drawings, like numerals represent like parts throughout the drawings. [Brief Description of the Drawings]

[0009] [Figure 1] 1 is a block diagram of a combustion turbine engine configured to supply power to a load, according to an embodiment. [Figure 2] 2 is a flowchart illustrating an emission control process that can be used to operate the combustion turbine engine of FIG. 1, according to an embodiment. [Figure 3]This flowchart illustrates an alternative emissions control process, according to one embodiment, in which measurements from various detection and monitoring devices can be used as feedback to operate the combustion turbine engine shown in Figure 1. [Figure 4] This is a normalized power versus ambient temperature plot demonstrating the emission control process shown in Figure 2 or Figure 3, according to one embodiment, which can maintain low power output over a temperature range. [Figure 5] This is a normalized exhaust temperature versus ambient temperature plot demonstrating the exhaust control process shown in Figure 2 or Figure 3, according to one embodiment, which can keep the exhaust temperature equal to the baseline temperature during low-load operation. [Figure 6] This is a plot of normalized NOx flow rate versus ambient temperature demonstrating the emission control process shown in Figure 2 or Figure 3, according to one embodiment, which can keep the exhaust NOx mass flow rate equal to the baseline NOx mass flow rate during low-load operation. [Figure 7] Figure 2 or 3 shows a normalized CO exhaust mass flow rate versus ambient temperature plot demonstrating an emission control process according to one embodiment that can keep the exhaust CO mass flow rate below the baseline CO mass flow rate during low-load operation. [Modes for carrying out the invention]

[0010] One or more specific embodiments are described below. Not all features of actual embodiments are described herein in order to provide a concise description of these embodiments. It should be understood that in the development of actual embodiments, such as in engineering or design projects, many embodiment-specific decisions must be made to achieve the developer's specific objectives, such as addressing system-related and business-related constraints, and that these constraints may differ from embodiment to embodiment. Furthermore, it should be understood that such development efforts, while complex and time-consuming, are still routine design, fabrication, and manufacturing tasks for those skilled in the art who are interested in this disclosure.

[0011] When introducing elements of the various embodiments of this disclosure, the articles “a, an,” “the,” and “said” are intended to mean that there is one or more of those elements. The terms “comprising,” “including,” and “having” are intended to be comprehensive and mean that there may be further elements other than those listed. Furthermore, all numerical examples in the following description are intended to be non-exclusive, and additional numbers, ranges, and percentages are within the scope of the embodiments disclosed. Furthermore, the phrase A “based” B is intended to mean that A is at least partially based on B. Furthermore, the term “or” is intended to be comprehensive (e.g., logical OR) and not exclusive (e.g., logical XOR). In other words, the phrase A “or” B is intended to mean A, B, or both A and B.

[0012] Combustion turbine generators (CTGs) in power plants produce exhaust gases from their combustion processes during operation. These exhaust gases contain toxic gases and pollutants (nitrogen oxides (NOx)) that are treated (for example, by a catalytic assembly in the CTG's exhaust system) to meet emission regulations. x This may include (for example, carbon monoxide (CO) and unburned hydrocarbons). In some examples, the catalyst assembly is a selective catalytic reduction (SCR) system that operates optimally at specific emission concentrations. Based on given operating constraints (such as load conditions and emission regulations), the combustion turbine controller can perform corresponding actions to control specific gas concentrations and / or gas mass flow rates in the exhaust gas in accordance with the emission regulations.

[0013] This disclosure generally relates to operating combustion turbines at a wide range of power outputs (e.g., partial load and / or no load) while meeting emission targets under environmental regulations. By using the techniques disclosed herein, the operating performance of the CTG can be improved. In one embodiment, a wider inlet NO to the SCR is optionally provided. x Inlet NO with flow rate range x A method involving modification of the SCR used to post-process the conditions, with a narrower entry point to the SCR. x The reduction in hardware cost, complexity, and reliability of CTGs due to the flow range, NO x Emission compliance can be achieved. In one embodiment, CO emission compliance can be achieved because the combustion temperature at low load operation is higher compared to a method that adds CO catalyst costs, which are sometimes necessary to after-treat high CO flows at low load operation, which often has a lower combustion temperature.

[0014] The operability of a CTG can be improved by using the techniques disclosed herein. In one embodiment, a better or equal compressor stall margin can be achieved in a CTG compared to a CTG operation using a reduced compressor pressure ratio for a given operating point via bleed, during low-load steady state and / or transient operation (e.g., transient to low-load operation). The increased compressor stall margin can reduce the potential for hazards and damage to CTG components during steady state or transient operation. The techniques disclosed herein can also improve the component lifespan and durability of a CTG. In one embodiment, the lifespan of the high-temperature section of a combustion engine can be improved by reducing water injection (e.g., in a CTG using water as a diluent).

[0015] In addition to the improvements in the operability and durability of CTGs and their components as described above, the technologies disclosed herein can broaden the applications of CTGs in power generation systems. In some applications, certain power markets may financially compensate CTG power plants with a wider power operating range extending to lower loads, which may be achievable by implementing the disclosed technologies (such as simple ammonia (NH3) injection systems sized for high NH3 flow rates and SCR systems with smaller, more efficient CO catalysts). Such embodiments facilitate low-load CTG operation at a lower cost than large, complex modifications (e.g., modifications to SCR systems). Thus, the additional revenue from the enhanced operating range can generate greater profits for the CTG power plant compared to using large, complex modifications. In one embodiment, a vendor (e.g., a distributor) can sell electricity generated from a CTG implemented using the disclosed technologies, thereby providing the same or similar operating range as a CTG facilitated by expensive modifications, thereby increasing price, profit margin, and / or incentives to sell the electricity.

[0016] In some cases, a hybrid power plant including an energy storage system (ESS) and / or thermal assets that provides a wide power operating range (e.g., extending to low loads) can be designed at a cost equivalent to or lower than that of a plant without the disclosed technology and with greater flexibility. For example, to operate at loads below the threshold load of the thermal asset, the ESS may consume excess power beyond the desired plant power operating point. Consuming this power would require increasing the power output and / or energy capacity of the ESS, which could increase capital and operating costs. To avoid such additional costs, the hybrid power plant can implement thermal modifications to facilitate low-load thermal operation and smaller ESSs. By comparison, with the disclosed technology, the minimum load of the thermal asset may be higher than with thermal modifications, but the total cost with a larger ESS may be the same or lower. The use of an ESS can add flexibility and potential revenue streams that can be scaled according to the ESS size. Since ESS prices may decrease over time, the additional cost of the ESS may decrease accordingly, thereby reducing the total cost. Such increased flexibility can help increase profit margins, lower prices, or add large amounts of energy storage to enhance value and potentially increase profit margins.

[0017] With the foregoing in mind, and referring to the drawings, Figure 1 is a block diagram of one embodiment of a combustion turbine system 10. For example, the combustion turbine system 10 may be part of a combined cycle system or may be combined with other combustion turbine systems 10 to power one or more loads 12. Specifically, the combustion turbine system 10 is generally configured to drive a load 12 by burning a mixture of compressed air 22 and fuel 14 (e.g., natural gas, light or heavy distilled oil, naphtha, crude oil, residue, or synthesis gas). Combustion takes place in a combustor 16 which may include one or more combustion chambers. A fuel sensor (FS) 15 can be used to monitor the rate of fuel injection into the combustor 16. Air 13 enters the intake of a compressor 20, is filtered, and then compressed in the compressor 20 through one or more compression stages. The compressed air stream 22 produced from the compressor 20 is led to the combustor 16.

[0018] As shown in the figure, the compressor 20 may include one or more bleed valves (BVs) 21. The degree to which the bleed valves 21 are open or closed may be adjustable. For example, when the combustion turbine system 10 is shut down or operating at low power, the bleed valves 21 can be adjusted to some extent to reduce the airflow. The bleed valves 21 can be installed at different locations on the compressor 20 or between compressors in a multi-compressor system.

[0019] To initiate the combustion process within the combustor 16, a compressed air stream 22 is mixed with fuel 14. Using the mixture of fuel 14 and compressed air stream 22, ignition can occur within the combustion chamber. Ignition generates high-temperature combustion gases 26 that power the combustion turbine system 10. More specifically, the high-temperature combustion gases 26 flow through a turbine 28 having one or more compression stages that drive a load 12 via a shaft 30. For example, the combustion gases 26 can generate power (e.g., via convection, expansion, etc.) in the turbine rotor blades within the turbine 28, causing the shaft 30 to rotate. In an exemplary process, the high-temperature combustion gases 26 can drive the shaft 30 along the axis of the combustion turbine system 10 to rotate the turbine blades within the turbine 28. As shown in the figure, the shaft 30 can be connected to various components of the combustion turbine system 10, including a compressor 20 or a load 12.

[0020] In some embodiments, various control and monitoring devices can be used to control and monitor combustion within the combustor 16. In the embodiment of Figure 1, the combustor 16 includes one or more fuel nozzles (FNs) 17, which may be located at different locations on the combustor 16. The fuel flow to the fuel nozzles 17 is adjustable so that fuel injection into the combustor 16 is controllable. For example, a controller 38 can adjust the fuel-to-air ratio within the combustor 16 by utilizing a fuel flow circuit coupled to the fuel nozzles 17. By adjusting the fuel nozzles 17, it is possible to control the fuel splitting between the fuel injection ports (e.g., fuel nozzles 17) on the combustor 16. Controllable fuel splitting can alter certain physical properties of the combustion flame 18, such as the temperature and location of the combustion flame 18. In some embodiments, the controller 38 may utilize the fuel flow circuit to adjust one or more fuel delivery valves to direct the fuel flow to one or more fuel nozzles 17 and passages within the combustor 16. In some embodiments, additional monitoring devices may be used to monitor certain physical properties of the combustion flame 18. For example, a temperature sensor (TS) 23 can be used to measure the temperature of the combustion flame 18. In certain embodiments, a flame detector (FD) 24 can be used to detect the presence and / or location of the combustion flame 18.

[0021] As shown in Figure 1, a diluent injection (DI) system 19 is coupled to the combustor 16. The diluent injection system 19 can inject a specific diluent (such as water or steam) into the combustor 16 to alter specific physical properties (e.g., temperature) of the combustion flame 18, and thus maintain specific emissions in the exhaust gas 32 in accordance with emission regulations. For example, water or steam injection cools the temperature of the combustion flame 18 and reduces NO x Diluent injection system 19 may be used to reduce the formation of

[0022] As described above, the shaft 30 may connect the turbine 28 to the compressor 20 to form a rotor. The compressor 20 may include compressor blades coupled to the shaft 30. Accordingly, rotation of the turbine blades within the turbine 28 may cause the shaft 30 connecting the turbine 28 to the compressor 20 to rotate the compressor blades within the compressor 20. This rotation of the compressor blades within the compressor 20 causes the compressor 20 to compress air 13 and generate a compressed air stream 22. As described above, the compressed air stream 22 is then supplied to the combustor 16 and mixed with other combustion components. The shaft 30 may drive the compressor 20 in addition to or in place of the load 12. As an example, the load 12 may be a generator of the combustion turbine system 10. Additionally or alternatively, the load 12 may include a propeller, a transmission, a drive system, or any other mechanism configured to receive mechanical force from rotation of the shaft 30.

[0023] As the turbine 28 extracts work from the hot combustion gas 26, a stream of exhaust gas 32 may be provided to an exhaust section 34, where the exhaust gas 32 may be further processed and / or cooled. For example, in the illustrated embodiment, the exhaust section 34 may include a catalyst assembly 35. The catalyst assembly 35 is an exhaust emission control device that reduces toxic gases and pollutants in the exhaust gas 32 by using various aftertreatment emission control technologies such as oxidation catalysts and / or selective catalytic reduction (SCR).

[0024] The catalyst assembly 35 may use one or more oxidation catalysts to treat specific emissions in the exhaust gas 32. The oxidation catalyst may be a CO catalyst, NO x catalyst, unburned hydrocarbon catalyst, and / or any similar metal-based (e.g., platinum-based) catalyst. For example, the catalyst assembly 35 may treat NO in the stream of exhaust gas 32 x NO that destroys gases xA catalyst may be included. The stream of exhaust gas 32 can then exit the exhaust section 34 after being treated by the catalyst assembly 35.

[0025] The catalyst assembly 35 may also include a selective catalytic reduction (SCR) system. The SCR system uses a catalyst (e.g., titanium oxide) to reduce NO x It converts to diatomic nitrogen (N2) and water (H2O). A gaseous reducing agent (such as anhydrous ammonia), aqueous ammonia, or urea can be added to the exhaust gas 32 and adsorbed onto the catalyst. For example, ammonia can be injected into the exhaust gas 32 using an ammonia (NH3) injection system. The exhaust gas 32 is mixed with ammonia and enters a reactor containing a catalyst, where the ammonia is converted to NO in the presence of the catalyst within a specific temperature range. x It responds selectively to this.

[0026] The exhaust section 34 may include various monitoring devices for monitoring physical properties (e.g., temperature of exhaust gas 32) and / or chemical properties (e.g., exhaust gas concentration). For example, the exhaust section 34 may include one or more temperature sensors (TS) 36 for measuring the temperature of the exhaust gas 32. In some embodiments, the exhaust section 34 may monitor specific exhaust gases (e.g., CO and NO). x It may include one or more discharge sensors (ES) 37 that measure the concentration and / or mass flow rate of )

[0027] As shown in the figures, the combustion turbine system 10 includes one or more controllers 38. The controller 38 may include one or more processors 66 and memory 68, which may be used collectively to support operating systems, software applications, and systems, etc., useful for implementing the techniques described herein. In particular, the controller 38 may include code or instructions stored in a non-temporary machine-readable medium (e.g., memory 68) and executed, for example, by one or more processors 66 that may be included in the controller 38. The processor 66 may receive operating parameters from various components of the combustion turbine system 10, including the rotational speed of the shaft 30, the frequency and / or voltage of the power generated by the combustion turbine system 10 via a generator (e.g., load 12) driven by the shaft 30, requests from one or more loads 12, or other appropriate parameters. In some embodiments, some parameters are measured directly, and others are determined indirectly from other measurements. For example, in a particular embodiment, the controller 38 can use an algorithmic model or a lookup table (for example, stored in memory 68) to derive various parameters, such as the operating speed of the shaft 30 or the connected generator, using electrical parameters such as the frequency or voltage of the power generated by the generator.

[0028] Furthermore, the controller 38 can monitor the operation of various parts of the combustion turbine system 10 via specific monitoring devices. The monitored parameters may include, but are not limited to, the following: the fuel injection rate of 14 (e.g., via fuel sensor 15), the temperature and location of the combustion flame 18 in the combustor 16 (e.g., via temperature sensor 23 and flame sensor 24), the temperature of the exhaust gas 32 in the exhaust section 34 (e.g., via temperature sensor 36), and specific exhaust gases of the exhaust gas 32 in the exhaust section 34 (e.g., CO and NO). xThe concentration and / or mass flow rate (e.g., via the exhaust sensor 37), or other relevant parameters. The monitored parameters can be used to control (e.g., adjust) the operating parameters of one or more embodiments of the combustion turbine system 10. For example, during the operation of the combustion turbine system 10, the temperature of the exhaust gas 32 in the exhaust section 34 can be measured by one or more temperature sensors 36. Based on the measured temperature of the exhaust gas 32, the controller 38 can cause one or more bleed valves 21 to adjust their valve opening and / or control the fuel splitting between the fuel nozzles 17, thereby changing (e.g., increasing) the temperature of the exhaust gas 32.

[0029] As shown in the figure, the controller 38 may include a catalyst controller 39. The catalyst controller 39 is configured to be communicatively coupled to the catalyst assembly 35. In one example, the catalyst controller 39 is configured to receive signals representing the temperature of the exhaust flow upstream of the catalyst assembly 35 and the temperature of the treated exhaust flow downstream of the catalyst assembly 35. One or more temperature sensors 36 may be located upstream and downstream of the catalyst assembly 35. The catalyst controller 39 controls appropriate emission levels (e.g., NO x A target temperature can be determined based at least in part on the exhaust gas (NOx and / or CO level). The catalyst controller 39 can generate a control signal corresponding to the target temperature (e.g., via one or more processors 66). For example, the control signal may include an instruction to raise the temperature of the exhaust gas 32 before it flows into the catalyst assembly 35. The control signal corresponding to the target temperature may be sent to one or more bleed valves 21 on the compressor 20 to adjust the valve opening, or to one or more fuel supply lines to the combustor (not shown separately) to control the fuel splitting between the fuel nozzles 17, thus adjusting the temperature of the exhaust gas 32 to the target temperature. By controlling the temperature of the exhaust gas 32 flowing into the catalyst assembly 35, a specific exhaust gas (NOx) can be controlled. xEmissions (and CO, etc.) can be controlled to achieve appropriate levels in accordance with emission regulations, regardless of the operating load of the combustion turbine system 10.

[0030] It should be noted that the components described above for the combustion turbine system 10 are exemplary components. For example, some embodiments of the combustion turbine system 10 may include additional or fewer components than those shown. For example, various embodiments of the combustion turbine system 10 may include multiple shafts, multiple combustors, multiple catalyst assemblies, and / or other suitable turbine system components.

[0031] As mentioned above, before releasing the exhaust gas into the atmosphere through the exhaust section 34, an exhaust emission control device (e.g., catalytic converter assembly 35) is used to remove NO x This also reduces toxic gases and pollutants such as CO gas. During operation, the combustion turbine (e.g., combustion turbine system 10) may generate a large amount of emissions, which are treated (e.g., by a catalyst and / or SCR) before being released into the atmosphere to meet emission regulations.

[0032] With the above in mind, exhaust gases (for example, NO) emitted from combustion engines in power plants x The following materials relating to exhaust gases (and CO gas) are provided to give some understanding of such exhaust gases and to provide real-world situations useful for other aspects of this disclosure.

[0033] "NO x The term "nitrogen oxides" refers to nitrogen oxides classified as air pollutants, such as nitric oxide (NO) and nitrogen dioxide (NO2). x The gas can be generated from the reaction between nitrogen and oxygen during the combustion of fuel (e.g., hydrocarbons) in a combustion turbine (e.g., combustion turbine system 10). In some cases, CTG power plants produce NO xIt is possible to have an operating license that sets emission limits as limits on air pollution. Carbon monoxide (CO) is a colorless, odorless, and tasteless flammable gas that is also a regulated air pollutant.

[0034] NO generated during combustion x And CO gas can result in increased emissions without readjusting the operating and maintenance settings of the CTG power plant. For example, in some embodiments, NO x Emissions may increase at high combustion flame temperatures, which are often used in high-load operation. In other embodiments, CO emissions may limit partial-load / no-load operation, which may be used more frequently due to the increased involvement of intermittent renewable power (such as wind and solar power).

[0035] CTG power plants can be designed to operate within a specific power range to maintain emissions compliance (e.g., meeting specific emission targets). Emission targets are NO x This may include the instantaneous and / or integrated exhaust gas concentrations or masses of certain constituent gases such as CO. The operating power range of a CTG power plant is the minimum operating power (P min ) and maximum operating power (P max ) can be specified by a lower P min Power plants operating in this range can offer greater power supply flexibility and grid efficiency. However, in the extended power range (e.g., less than 25% of the CTG power plant's total load), min ) operation was originally intended for a limited power range (for example, P exceeding 50% of the total load of the CTG power plant). min This may not be compatible with existing combustion turbine designs (including diluent injection, precise fuel injection, and exhaust emission control, including combustion control) that have been developed for this purpose.

[0036] To operate across an extended power range, combustion turbines (CTs) in a power plant can be modified to meet emission targets across the CT's operating range. For example, CT modifications may include implementing advanced combustion control technologies (e.g., fuel injection hardware for precise fuel control). Additionally or alternatively, CT modifications may include increased CO catalysts and lower NO emissions. x This may involve exhaust gas aftertreatment, such as modifications to the ammonia injection system for a flow rate range, advanced SCR control, or a combination thereof. However, such modifications can result in excessive costs and may hinder the operational flexibility of the CTG power plant. For example, a CTG power plant initially designed at a given cost may limit the minimum operating power to a certain threshold (e.g., 50% of the power output of the CTG power plant's full load). Thus, a CTG power plant may be prohibited from operating in low-power modes (e.g., operation at output power less than 25% of the CTG power plant's full load) due to excessive costs (e.g., costs associated with the use of CO catalysts and / or SCR modifications).

[0037] The technology described herein can provide a suitable method for a CT to operate over a wider power range in terms of emissions compliance, while avoiding expensive modifications to the CT (e.g., scaling up the SCR system and / or modifying the fuel injection system). Figure 2 shows a flowchart illustrating an emissions control process 100 that can be used to operate a CT (e.g., a combustion turbine system 10) over an extended power range without costly modifications.

[0038] The emission control process 100 can be initiated when the combustion turbine (CT) enters an operating state different from a previous operating state (block 102). In some embodiments, the CT can receive instructions that the combustion turbine should operate at a load lower than full load (e.g., partial load or no load). Instructions may include processor-generated signals (e.g., from the controller 38), analog signals, sensor signals from sensors, artificial intelligence inference performed using a neural network, user input, and / or other appropriate signals or inputs. For example, the CT can receive instructions to switch from high-load operation (e.g., more than 50% of the CT's full load) to low-load operation (e.g., less than 25% of the CT's full load), instructions to switch from low-load operation to high-load operation, instructions to shut down from an active state, and instructions to start from an inactive state (e.g., from the CT operator via a specific user interface which can be communicably coupled to the controller 38).

[0039] As described below, when switching from high-load operation to low-load operation, the controller 38 can determine emission targets for different by-products (e.g., target emissions from the exhaust section 34) based on the new load and other operation-related information. According to the new emission targets, the CT can perform various operations to control emissions by adjusting specific gas concentrations and / or gas mass flow rates in the exhaust gas according to the emission targets. As the load decreases, the total exhaust gas mass flow rate is reduced accordingly. Consistent NO flow between high and low loads. x To maintain the ratio, the controller 38 increases the combustion temperature when operating in low-load mode, reducing NO in the total exhaust gas mass flow rate. x The concentration can be increased. Consistent NO x In terms of flow rate, SCRs produce NO at both high and low loads. x This allows for consistent processing. Furthermore, by increasing the combustion temperature, the CO concentration is reduced to below the CO concentration at lower temperatures. In some embodiments, the controller 38 utilizes the increase in combustion temperature to provide consistent NO between high and low loads.x To maintain the ratio, the fuel type can be changed (for example, by switching to another fuel such as hydrogen gas), or the mixture ratio of different fuel types can be changed.

[0040] After the CT enters a new operating state (e.g., low-load operation), the controller 38 can determine the CT emission targets and operating parameters for the new state (block 104). The emission targets may include, but are not limited to, instantaneous and / or integrated exhaust gas concentrations, instantaneous and / or integrated exhaust gas mass or mass flow rate, and specific exhaust gases (e.g., NO) in the CT exhaust flow (e.g., the treated exhaust flow downstream of the catalyst assembly 35). x Constraints on CO gases. As mentioned above, CTs can be designed to operate within a specific power range in terms of emissions compliance (e.g., meeting the specific emission targets listed above).

[0041] The determination of CT emission targets and operating parameters may be performed by the controller 38 via one or more processors 66 and memory 68. For example, based on a new operating state of the CT (e.g., 5% of the total CT load), the controller 38 can access specific CT operation-related codes or instructions stored in a non-temporary machine-readable medium (e.g., memory 68). The controller 38 can execute the accessed codes or instructions by one or more processors 66 to determine emission targets and operating parameters corresponding to the new operating state of the CT. The operating parameters may relate to CT operation and performance, field performance tests during operation, etc., which may be empirically collected and / or derived during CT manufacturing.

[0042] In some embodiments, the controller 38 may receive additional / supplementary information (e.g., CT operating constraints) from different sources that can be used in determining emission targets and operating parameters (block 106). For example, the controller 38 may receive information related to a given CT operating constraint via a user interface (e.g., a CT control interface controlled using a keyboard, mouse, or keypad). Examples of a given CT operating constraint may include specific gas concentration or mass flow limits for exhaust gas 32 flowing into the catalyst assembly 35 and / or specific gas concentration or mass flow limits for treated exhaust gas exiting the exhaust section 34, and other operating constraints.

[0043] Additionally or alternatively, the controller 38 may use a lookup table stored in a non-temporary machine-readable medium (e.g., memory 68) to retrieve CT emission targets and operating parameters corresponding to a new operating state of the CT, with or without additional / supplementary information related to a given CT operating constraint. In some cases, the controller 38 may use a simulation model stored in a non-temporary machine-readable medium (e.g., memory 68) or a remote network (e.g., the cloud) to determine the CT emission targets and operating parameters based at least partially on additional / supplementary information. For example, the simulation model can receive inputs such as specific operating parameters / settings related to a new operating state of the CT, and / or additional / supplementary information provided by the operator related to a given CT operating constraint, and perform a simulation to determine the CT emission targets and operating parameters. In certain cases, the CT operator may directly provide the CT emission targets and operating parameters based on the new operating state of the CT via a user interface.

[0044] Based on at least determined operating parameters, the controller 38 can perform emission control operations (block 108). Emission control operations can be used to adjust specific gas concentrations and / or gas mass flow rates in the exhaust gas according to determined emission targets. Such operations can be performed automatically by the controller 38 or by specific commands provided by the CT operator during operation. Below, examples of operations are provided to give some understanding of CT emission control operations.

[0045] For example, the controller 38 can perform operations to control the air supply to the compressor 20 (block 110). For example, when the CT 10 enters low-load operation, the controller 38 may adjust the valve opening using one or more bleed valves 21 on the compressor 20. In some embodiments, the CT 10 may include one or more compressors 20. The controller 38 can partially open one or more bleed valves 21 in or between one or more compressors 20 of the CT 10. Adjusting the valve opening can further open the bleed valves 21 to reduce the airflow rate and result in a higher fuel-to-air ratio that increases the combustion temperature in the combustor 16. As mentioned above, as the combustion temperature rises, the CO concentration in the exhaust gas 32 may decrease. Thus, the CT can operate at low load (e.g., less than 25% of the full load of the CT) while meeting CO emission targets from the combustor 16 (e.g., CO mass flow rate levels below a predetermined threshold in low-load operation).

[0046] Additionally or alternatively, the controller 38 may perform fuel supply management operations to increase the combustion temperature. That is, the controller 38 can perform actions to control the fuel supply to the CT combustor (block 112). For example, when the CT enters low-load operation, the controller 38 may utilize one or more fuel nozzles 17 in the combustor 16 to increase fuel injection into the combustor 16. Increasing fuel injection can raise the temperature of the combustion flame 18, thereby reducing the CO concentration in the exhaust gas 32.

[0047] As the combustion temperature of the combustion flame 18 rises (for example, after performing the operations described in blocks 110 and 112), NO in the exhaust gas 32 x The formation of NO from combustor 16 may increase. x To meet emission targets, the diluent injection system 19 may be utilized by the controller 38 to adjust the injection of diluent into the combustor 16 (block 114). Diluent injection may include injecting a diluent (such as water or steam) into the combustor 16. Diluent injection may maintain an acceptable range of CO concentration while reducing NO emissions. x It can be used to reduce the formation of NO to a mass similar to the mass that reaches the SCR during high / full load operation of the CT10. x The flow can be reduced. Alternatively, for example, the flow of the diluent can be reduced and the combustion temperature in the combustor 16 can be increased by at least partially closing the diluent valve to reduce the amount of diluent in the combustor 16.

[0048] Additionally or alternatively, the controller 38 can perform one or more operations to adjust the catalyst assembly 35 in the exhaust section 34 (block 116). For example, the controller 38 can cause the catalyst assembly 35 to utilize one or more oxidation catalysts to treat specific emissions in the exhaust gas 32 to meet the overall emission target. Such oxidation catalysts could be CO catalysts, NO catalysts, etc. x The catalyst may include a catalyst, an unburned hydrocarbon catalyst, and / or other suitable catalysts. In some embodiments, the catalyst assembly 35 contains NO in the stream of exhaust gas 32. x NO destroys gas xA catalyst may be used. In some embodiments, a CO catalyst may be used to reduce the CO gas concentration and / or mass flow rate in the exhaust gas 32 stream. In certain embodiments, the controller 38 may selectively change the temperature of one or more components of the catalyst assembly 35 or the input to the catalyst assembly 35 in order to increase the catalytic action of the catalyst assembly 35. For example, the controller 38 may selectively change the temperature of the components of the catalyst assembly 35 or their inputs (e.g., air, ammonia, or a mixture of air and ammonia) in order to compensate for the increase in exhaust gas during partial load or no-load conditions.

[0049] In some cases, the catalyst assembly 35 may include a selective catalytic reduction (SCR) system. For example, the SCR system uses a catalyst (e.g., a metal oxide such as titanium oxide) to reduce NO x It may be converted to diatomic nitrogen (N2) and water (H2O). A gaseous reducing agent (e.g., ammonia or urea) is added to the exhaust gas 32 and adsorbed onto the corresponding catalyst to produce a first exhaust gas type (e.g., NO x The exhaust gas (NO) can be treated. The exhaust gas 32 mixed with the gaseous reducing agent can enter a catalytic reactor (or chamber). Increasing the amount of reducing agent can dynamically increase the catalytic activity in the catalytic assembly. The gaseous reducing agent, in the presence of the corresponding catalyst within a specific temperature range, can process NO x It can react selectively to this. Therefore, the SCR system outputs NO x NO according to emission targets x It is possible to control the amount of waste produced.

[0050] Although at least some of the operations described above are described to be performed separately, it should be noted that the controller 38 may perform multiple operations, including at least some of the exemplary operations described above and / or other suitable operations that can help control CT emissions sequentially, simultaneously, or in combination thereof. For example, the controller 38 may use the bleed valve 21 to adjust the valve opening to increase the fuel-to-air ratio and simultaneously increase the fuel injection rate (e.g., partially open the fuel valve). Such combined operations can raise the combustion temperature more efficiently than using only one operation. In some embodiments, it is possible to perform certain operations sequentially to balance specific gas emissions produced by different operations. For example, as the combustion temperature rises, NO in the exhaust gas 32 x The formation of NO in exhaust gas 32 may increase. x To compensate for the increase, ammonia (NH3) injection is used by the SCR system to treat the NO in the exhaust gas coming out of exhaust section 34. x It can reduce emissions.

[0051] During and / or after the emission control operation performed by the controller 38, the controller 38 can measure CT performance-related parameters, including emissions and / or temperature, using various sensing and monitoring devices (block 118). Such sensing and monitoring devices can be deployed between multiple CT components, including the combustor 16 and the exhaust section 34.

[0052] In some embodiments, the controller 38 can measure the temperature of the combustion flame 18 using a temperature sensor 23 deployed within the combustor 16. In addition, it is possible to detect the presence and location of the combustion flame 18 using a flame detector 24 deployed within the combustor 16. The temperature sensor 23 and flame detector 24 may be distributed to different locations within the combustor 16. Such distributed temperature and flame detection can provide a detailed profile of the combustion flame 18 for enhanced combustion monitoring and control using at least one of the control mechanisms described above.

[0053] In some embodiments, in the exhaust section 34, the controller 38 may utilize one or more temperature sensors 36 to measure the temperature of the exhaust gas 32. Furthermore, an exhaust sensor 37 may be used to detect specific exhaust gases (e.g., CO and NO). x The concentration and / or mass flow rate of ) may be measured. The temperature sensor 36 and exhaust sensor 37 may be distributed to different locations in the exhaust section 34. For example, some of the temperature sensor 36 and exhaust sensor 37 may be deployed before the exhaust gas 32 enters the catalyst assembly 35, and other temperature sensor 36 and exhaust sensor 37 may be deployed after the exhaust gas 32 has been processed and exited the catalyst assembly 35. Such distributed temperature and exhaust sensing can provide temperature and exhaust fluctuations before and after processing provided by the catalyst assembly 35 (e.g., using an oxidation catalyst and / or SCR system).

[0054] Measured CT performance-related parameters (e.g., CO and NO) x The concentration and mass flow rate of specific exhaust gases (including CO and NO) are analyzed by the controller 38 via one or more processors 66, and actions performed in response to the new operating state of the CT (e.g., blocks 110, 112, 114, and 116) are performed to ensure that the exhaust gases (e.g., CO and NO) meet the acceptable levels of the CT emission target. x It is possible to determine whether this results in a concentration and mass flow rate (block 119).

[0055] The measured CT performance-related parameters can also be transmitted to one or more monitoring devices (block 120) to enable the CT operator to monitor CT performance. Monitoring may be performed locally by the CT operator (e.g., via a display panel on the controller 38, a user interface on a computer linked to the controller 38 from the field CT control room, a Bluetooth® device configured to receive the measured CT performance-related parameters, etc.) and / or remotely (e.g., via a smartphone or a virtual machine in the cloud to access the measured CT performance-related parameters). This external monitoring can be used to fine-tune, repeat, and / or continue the discharge control operation 108.

[0056] Additionally or alternatively, various sensing and monitoring devices that measure CT performance-related parameters may be fed back to the controller 38, enabling the controller 38 to dynamically determine emission targets based at least partially on the CT performance-related parameters. For example, Figure 3 shows a flowchart of an emission control process 150 that can be used to feed back CT performance-related parameters. Specifically, the emission control process 150 is similar to the emission control process 100, except that the emission control process 150 includes sending CT performance-related parameters back to the controller 38 (block 152). That is, the controller 38, various controllable devices (e.g., bleed valve 21, fuel nozzle 17, diluent injection system 19, catalyst assembly 35, etc.), and various sensing and monitoring devices (e.g., fuel sensor 15, temperature sensor 23 and flame detector 24 on the combustor 16, temperature sensor 36 and emission sensor 37 on the exhaust section 34, etc.) can form a closed-loop combustion turbine control system with feedback to dynamically determine emission levels against emission targets during the operation of the CT 10.

[0057] For example, the feedback data transmitted to the controller 38 may include temperature measurements obtained by the temperature sensor 23 in the combustor 16 and / or the temperature sensor 36 in the exhaust section 34, the location of the combustion flame detected by the flame detector 24 in the combustor 16, and emission measurements obtained by the emission sensor 37 in the exhaust section 34. Such feedback data is analyzed by the controller 38 via one or more processors 66 and memory 68, and an operation 108 performed in response to a new operating state of the CT 10 is performed to ensure that the exhaust gases (e.g., CO and NO) are at acceptable levels. x It is possible to determine whether this results in a concentration and mass flow rate. If a particular exhaust gas level exceeds the CT emission target, the controller 38 can determine adjusted operating parameters via one or more processors 66 and memory 68 to perform further operations 108 to control the emissions in order to meet the CT emission target.

[0058] In some embodiments, a model can be used by the controller 38 to determine CT emission targets and operating parameters. The model may include computer simulation models, physics-based models, empirical models, and the like. Furthermore, the model may be stored in a non-temporary machine-readable medium (e.g., memory 68) or a remote network (e.g., a cloud via appropriate computing and communication devices such as servers and routers).

[0059] For example, a simulation model can perform a simulation to determine whether specific implemented operating parameters should be adjusted to provide improved emission control that meets CT emission targets, using at least some of the feedback data, specific operating parameters / settings related to the current operating state of the CT, and / or additional / supplementary information provided by the operator related to a given CT operating constraint. Furthermore, such a model-based CT emission control mechanism as part of a combustion turbine control system can be implemented in real time or offline depending on the CT operating environment.

[0060] Embodiments disclosed in the previous section relate to combustion turbine control systems that can be used to operate a CT at partial load or no load while meeting emission targets. Such combustion turbine control systems can enable the CT to perform a variety of operations that control CT emissions by adjusting specific gas concentrations and / or gas mass flow rates in the exhaust gas. As mentioned above, these various operations may include, but are not limited to, controlling fuel and / or diluent injection into the combustor to control combustion temperature, controlling the compressor bleed valve to control combustion temperature, controlling a catalyst assembly (e.g., an SCR system) to treat exhaust gas before it is released into the environment, or a combination thereof. As mentioned above, these operations can enable the CT to maintain somewhat consistent exhaust conditions even at low load operation.

[0061] For example, the rise in exhaust gas temperature during low-load operation (e.g., by controlling fuel or diluent injection) can lead to NO emissions during high-load operation. x and / or to approximate CO exhaust conditions NO x and / or it may be possible to control CO exhaust conditions (e.g., mass flow rate). x The mass flow rate is used to determine the size of the reducing agent (e.g., NH3) injection system, so the difference between low and high loads is significant. xBy maintaining consistent mass flow, the CT10 can operate at a wider range of load levels, avoiding potentially costly modifications (i.e., reducing agent injection valves, manifolds, vaporizers, and / or nozzle sizing) that may be required to accommodate a wide variety of reducing agent flows. Similarly, since the CO mass flow rate and temperature are used to size the CO reducing catalyst within the SCR system, reducing the CO concentration at low loads means that the size or design of the CO catalyst does not need to be changed from that of an SCR operating only in a CT run at relatively high loads (e.g., above 50%). In other words, a CT10 with a simpler reducing agent injection system sized for higher reducing agent flows, as well as an SCR system with a smaller and / or more efficient CO catalyst, may have lower operating costs than a CT with a more complex reducing agent injection system (e.g., with a wider range of reducing agent flows) and an larger and / or less efficient CO catalyst. In such a method, a wider range of operation (e.g., close to 0 MW) may be available without increasing the size of the SCR and / or modifying the reducing agent injection system.

[0062] With the above in mind, in partial load or no-load operation, the CT10 can perform advanced operations using the controller 38. The simulation quantifies the lower limit that the CT load can achieve while maintaining exhaust conditions similar to those of a standard CT at baseline load. The baseline is the existing minimum load while maintaining emission compliance. The simulation results demonstrate that the CT can be configured to operate at a minimum load lower than the baseline (e.g., a minimum load equal to 37.5% of the baseline) without expensive SCR modifications.

[0063] During each simulation, the compressor variable bleed valve (VBV) is biased and opened to achieve the objective (exhaust temperature, NO). x NO until the mass flow rate and CO concentration are met. xThe water injection level was reduced from the standard value. Several simulation results are shown in Figures 4 to 7.

[0064] Figure 4 is a plot of normalized power 404 versus ambient temperature 402, showing that enhanced CT control can maintain a lower baseline 420, which is a portion (e.g., 37.5%) of the baseline power 410, across a temperature range. Points along the plot of uncorrected baseline power level 410 are black circles, and points along the plot of adjusted baseline power level 420 are white circles.

[0065] Figure 5 is a plot of normalized exhaust temperature 504 versus ambient temperature 402, showing that enhanced CT control can keep the exhaust temperature 520 at approximately the same level as the baseline temperature 510, while the enhanced CT control can operate the CT at lower loads (e.g., 37.5% of the baseline power 410).

[0066] Figure 6 shows the enhanced CT control and exhaust NO x Mass flow rate 620 baseline NO x While the mass flow rate can be kept nearly equal to 610, the enhanced CT control demonstrates that the CT operates at loads lower than the baseline power of 410, indicating normalized NO x This is a plot of flow rate (60°C) versus ambient temperature (40°C).

[0067] Figure 7 is a plot of normalized exhaust CO mass flow rate 704 versus ambient temperature 402, showing that enhanced CT control can keep the exhaust CO mass flow rate 720 below the baseline CO mass flow rate 710, while enhanced CT control can operate the CT at a load lower than the baseline power 410. x The mass flow rate 610 and the baseline CO mass flow rate 710 may be components of the exhaust emission profile of CT10 under minimum load conditions where the combustion temperature does not rise. In other words, the exhaust emission profile is NO x This may include the mass flow rate and / or concentration of various exhaust gases, such as CO.

[0068] This specification uses examples to disclose the System and Method, including the best mode, and to enable any person skilled in the art to practice the Art, including the manufacture and use of any apparatus or system and the implementation of any incorporated method. The patentable scope of this subject matter is defined by the claims and may include other embodiments that a person skilled in the art could conceive. Such other embodiments are intended to be within the claims if they have structural elements that are not different from the language of the claims, or if they include equivalent structural elements that do not substantially differ from the language of the claims. [Explanation of Symbols]

[0069] 10 Combustion Turbine Systems, CT 12 loads 13 Air 14 Fuel 15. Fuel Sensor (FS) 16 Combustor 17 Fuel nozzle (FN) 18 Combustion Flame 19. Diluent Injection (DI) System 20 Compressors 21. Bleed valve (BV) 22 Compressed air, compressed air stream 23 Temperature Sensor (TS) 24. Flame detector (FD), flame sensor 26 High-temperature combustion gases 28 Turbine 30 shafts 32 Exhaust gas 34 Exhaust Section 35 Catalyst Assembly 36 Temperature Sensor (TS) 37. Emission sensor (ES) 38 Controllers 39. Catalytic converter 66 processors 68 memory 100 Emissions Control Process 108 Discharge control operation 150 Emissions Control Process 402 Ambient temperature 404 Normalized Power 410 Baseline power level, Baseline power 420 baseline power levels, baseline 504 Normalized exhaust temperature 510 Baseline temperature 520 Exhaust temperature 604 Normalized NO x flow rate 610 Baseline No. x mass flow rate 620 Exhaust NO x mass flow rate 704 Normalized CO exhaust mass flow rate 710 Baseline CO mass flow rate 720 Exhaust CO mass flow rate

Claims

1. A method, and said method The steps include receiving instructions that the combustion turbine (10) should be operated under partial load or no-load conditions, In response to receiving the aforementioned instruction, the combustion turbine (10) is operated under the partial load or no-load conditions to generate exhaust emissions. While maintaining the exhaust gas temperature and exhaust emission profile when operating at a baseline load, which is the minimum load that can maintain emission compliance without increasing the combustion temperature in the combustion turbine (10), the exhaust emission contains nitrous oxide (NOx). ｘ In order to increase the concentration of ) and reduce the concentration of carbon monoxide (CO) in the exhaust gas, the steps include raising the combustion temperature in the combustion turbine (10) under partial load or no-load conditions, It includes, The step of raising the combustion temperature is By at least partially closing the diluent valve, the flow of diluent to the combustor (16) of the combustion turbine (10) is at least partially reduced, and To at least partially open one or more bleed valves (21) inside or between the compressors (20) of the combustion turbine (10). A method comprising at least one of the following.

2. The method according to claim 1, wherein the instruction includes a processor-generated signal, an analog signal, a sensor signal from a sensor, artificial intelligence inference from a neural network, user input, or other appropriate signal or input.

3. The method according to claim 1, further comprising the step of increasing the combustion temperature by increasing the fuel-to-air ratio in the combustor (16) of the combustion turbine (10).

4. The method according to claim 3, wherein the step of increasing the fuel-to-air ratio includes at least partially opening a fuel valve.

5. The method according to claim 1, wherein the step of raising the combustion temperature further includes adjusting a plurality of fuel delivery valves to direct the flow of fuel (14) to one or more fuel nozzles (17) and combustors (16) of the combustion turbine (10).

6. The method according to claim 1, wherein the step of increasing the combustion temperature further comprises changing the mixture of different fuel types used in the combustion turbine (10).

7. The method according to claim 1, further comprising the step of dynamically increasing the catalytic activity in a catalyst assembly (35) used to treat the exhaust gas in order to compensate for an increase in the concentration of nitrous oxide (NOx) in the exhaust gas under the partially loaded or unloaded conditions, wherein the catalyst assembly (35) comprises a carbon monoxide catalyst, a nitrogen oxide catalyst, an unburned hydrocarbon catalyst, or other suitable catalyst.

8. The method according to claim 7, wherein the step of dynamically increasing the catalytic activity includes selectively changing the temperature of one or more inputs to the catalyst assembly (35) or one or more components of the catalyst assembly (35), or increasing the injection of a reducing agent to treat CO emissions, wherein the input is air, ammonia, or a mixture of air and ammonia.

9. A system, and said system A combustion turbine (10) includes a compressor (20), a combustor (16), a turbine (28), an exhaust section (34), and a load (12) driven by a shaft (30) connected to the turbine (28), Multiple detection devices (15, 23, 24, 36, 37) and A catalyst assembly (35) is located in the exhaust section (34) and is configured to process exhaust gases from the combustion turbine (10) to meet emission targets, A controller (38) configured to perform a plurality of actions to control the gas concentration and gas mass flow rate in the exhaust gas according to emission targets, It is equipped with, and the aforementioned multiple actions, The steps include receiving an instruction that the combustion turbine (10) should operate under partial load or no-load conditions, A step of determining operating parameters corresponding to the partial load condition or no load condition, at least in part based on the instructions, wherein the operating parameters include the frequency and / or voltage of the power generated by the load (12) and at least one of the requests from the load (12); The steps include operating the combustion turbine (10) under partial load or no-load conditions using the aforementioned operating parameters, A step of measuring performance-related parameters of the combustion turbine (10) using the plurality of detection devices (15, 23, 24, 36, 37), wherein the performance-related parameters include at least one of the fuel injection rate (14), the temperature and location of the combustion flame (18) in the combustor (16), and the exhaust gas temperature and exhaust emission profile in the exhaust section (34); A step of adjusting the operation of the combustion turbine (10) during the operation under the aforementioned partial load or no-load conditions, based at least partially on the performance-related parameters; The process includes adjusting the operation of the combustion turbine (10), The step of increasing the combustion temperature in the combustion turbine (10) under partial load or no-load conditions, in order to increase the concentration of nitrous oxide (NOx) in the exhaust emissions and decrease the concentration of carbon monoxide (CO) in the exhaust emissions, while maintaining the exhaust gas temperature and exhaust emission profile when operating at a baseline load, which is the minimum load required to maintain emission compliance without increasing the combustion temperature in the combustion turbine (10). It includes, The step of raising the combustion temperature is By at least partially closing the diluent valve, the flow of diluent to the combustor (16) of the combustion turbine (10) is at least partially reduced, and To at least partially open one or more bleed valves (21) inside or between the compressors (20) of the combustion turbine (10). Including at least one of the following, system.

10. The system according to claim 9, wherein the plurality of detection devices (15, 23, 24, 36, 37) are configured to provide distributed temperature and emission detection by deploying a first portion of the temperature sensors (23, 36), an emission sensor (37), and / or model before the exhaust gas enters the catalyst assembly (35), and a second portion of the temperature sensors (23, 36), an emission sensor (37), and / or model after the exhaust gas leaves the catalyst assembly (35).

11. The system according to claim 9, wherein the plurality of actions include dynamically increasing the catalytic action in the catalyst assembly (35) to compensate for the rise in combustion temperature during operation under partial load or no-load conditions.

12. The system according to claim 9, further comprising increasing the combustion temperature in the combustor (16) to change the mixture of different fuel types used in the combustion turbine (10).

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