A control system and method for improving the efficiency of hydrogen-blended gas turbine units based on achieving emission standards.

Abstract

This invention provides a control system and method for improving the efficiency of hydrogen-blended gas turbine units based on compliance with emission standards. Since the combustion temperature of hydrogen is higher than that of ordinary natural gas (whose main component is natural gas), within the safety margin of the gas turbine unit, blending hydrogen can increase the turbine inlet temperature to a certain extent. At the same time, by adjusting the system through SCR denitrification, the unit efficiency can be maximized while ensuring compliance with nitrogen oxide emissions. On the basis of compliance with emission standards and unit safety, hydrogen blending is achieved. Under certain hydrogen blending conditions, by testing and controlling data such as fuel flow rate, air flow rate, combustion temperature, pollutant emissions, and unit vibration, the turbine inlet temperature and exhaust temperature of the unit can be effectively controlled at a specific blending ratio, thereby maximizing the efficiency of the combined cycle unit.

Description

Technical Field

[0001] This invention relates to the field of hydrogen-blended gas turbine power plant technology, and in particular to a control system and method for improving the efficiency of hydrogen-blended gas turbine units based on achieving emission standards. Background Technology

[0002] Hydrogen, the most abundant and lightest element in nature, has the highest calorific value per unit mass among traditional fuels. It can be produced from fossil fuels or through the electrolysis of water in new energy power generation, and can serve as an energy carrier in various applications, including power generation, industry, and transportation.

[0003] As is well known, gas-fired power can reduce carbon dioxide emissions by about 50% compared to coal-fired power. Increasing the proportion of gas-fired power can effectively reduce the carbon emission level of thermal power in my country. At the same time, gas-fired power generation is highly efficient, has low emissions, and can start and shut down quickly, providing a high-quality peak-shaving power source for the development of new energy sources. Furthermore, the blending of gas turbines with hydrogen / ammonia can further reduce their carbon emissions. Therefore, the development of pure hydrogen / hydrogen-blended gas turbines is an important supporting technology for building a new type of power system based on new energy sources.

[0004] However, the gas turbine co-firing hydrogen power generation technology still has drawbacks such as high flame temperature and NO. X High emissions and other issues.

[0005] When hydrogen is co-burned in a gas turbine, the mainstream gas turbine retrofitting technology currently aims to control nitrogen oxide emissions by changing the air-fuel ratio, reducing flame temperature, lowering unit load, and thus reducing nitrogen oxide emissions. However, this technology can affect the efficiency of the gas turbine-hydrogen power generation unit. Taking a 6FA gas turbine combustion chamber as an example, as the excess air coefficient in the combustion chamber increases, the combustion chamber outlet temperature (i.e., turbine inlet temperature) decreases, and the nitrogen oxide concentration decreases, as shown in the table below.

[0006]

[0007] In theory, when hydrogen is blended into a gas turbine, given a fixed fuel input heat and air-fuel ratio, increasing the blending ratio will raise the turbine inlet temperature of the unit, thereby improving the operating efficiency of the combined cycle unit. Taking a certain 6FA unit as an example, as shown in the table below.

[0008]

[0009] However, in reality, adding hydrogen to gas turbines can lead to excessive nitrogen oxide emissions. To control nitrogen oxide emissions, the unit needs to lower the combustion temperature, which in turn reduces the unit's output and efficiency. Taking a certain SGT-800 gas turbine as an example, under ISO conditions, the efficiency of the gas turbine at 100% load decreases as the volume ratio of hydrogen added increases, as shown in the table below.

[0010]

[0011] Therefore, how to reduce carbon dioxide emissions by co-firing hydrogen in combined cycle units while avoiding a decrease in the efficiency of the combined unit itself is a technical problem that urgently needs to be solved. Summary of the Invention

[0012] This invention provides a control system and method for improving the efficiency of hydrogen-blended gas turbine units based on compliance with emission standards. The technical problem it solves is how to avoid the reduction in efficiency of combined cycle units while ensuring compliance with nitrogen oxide standards and unit safety when blending hydrogen, and how to ensure that the unit always operates at the highest efficiency position at the hydrogen blending ratio.

[0013] To solve the above-mentioned technical problems, the present invention provides a control system for improving the efficiency of hydrogen-blended gas turbine units based on achieving emission standards, including a gas turbine unit;

[0014] An SCR denitrification system installed in a waste heat boiler;

[0015] A parameter detection module is installed at each detection point to detect the corresponding detection parameters;

[0016] The controller enables hydrogen co-firing while ensuring emissions compliance and unit safety. Based on the hydrogen co-firing ratio, it controls the turbine inlet temperature and exhaust temperature of the gas turbine unit under a specific co-firing ratio by testing and controlling data on fuel flow, air flow, combustion temperature, pollutant emissions, and unit vibration. This achieves the highest efficiency of the gas turbine unit under the current co-firing ratio.

[0017] Preferably, the parameter monitoring module includes a combustion chamber inlet pressure detection module, a combustion chamber air flow detection module, a combustion chamber inlet temperature detection module, a combustion chamber outlet temperature detection module, a carbon dioxide emission concentration detection module, and a vibration monitoring module.

[0018] Preferably, the parameter monitoring module further includes a nitrogen oxide concentration detection module at the inlet of the SCR denitrification system and a nitrogen oxide emission concentration detection module at the outlet of the SCR denitrification system.

[0019] A control method for improving the efficiency of hydrogen-blended gas turbine units based on achieving emission standards includes the following steps:

[0020] Step 1: Based on actual carbon reduction needs, determine the volume percentage of hydrogen required for the computer group to be incorporated into the combustion process.

[0021] Step 2: Based on the operating data of the hydrogen-blended gas-fired power plant, perform numerical modeling and model correction for heat balance;

[0022] Step 3: Correct the empirical formula for nitrogen oxide emissions from the gas turbine of the hydrogen-blended gas-fired power plant under different loads;

[0023] Step 4: Based on the relationship between ammonia injection and denitrification efficiency in the SCR denitrification system, calculate the allowable nitrogen oxide emission concentration of the gas turbine under fixed operating conditions;

[0024] Step 5: Based on the modified empirical formula for nitrogen oxide emissions from hydrogen-blended gas turbines, back-calculate the turbine inlet temperature and excess air coefficient of the hydrogen-blended gas turbine, and then adjust the gas turbine accordingly.

[0025] Step 6: After the gas turbine adjustment is executed, monitor the nitrogen oxide emission concentration before and after denitrification in the SCR denitrification system. If the emission standard is met and the ammonia slip value meets the requirements, the gas turbine unit will maintain stable operation with the existing parameters. If the emission standard cannot be met, gradually increase the ammonia water injection volume of the SCR denitrification system. If the original denitrification efficiency and emission standard cannot be met, return to step 4.

[0026] Preferably, in step 2, the corrected heat balance model matches the actual power plant operation under different loads by 99%.

[0027] Preferably, in step 4, the ammonia injection rate of the SCR denitrification system inside the waste heat boiler is adjusted under different loads in the hydrogen-blended gas turbine power plant to obtain the actual maximum SCR denitrification efficiency under different loads, and to ensure that the ammonia slip concentration is less than 2.5 mg / m³. 3 .

[0028] Preferably, in step 5, the allowable nitrogen oxide emission concentration of the gas turbine obtained in step 4 is calculated using the modified formula obtained in step 3, and the relationship between the turbine inlet temperature T4 and the excess air coefficient of the combustion chamber is back-calculated.

[0029] Preferably, the empirical formula described above is:

[0030]

[0031] Among them, P in T represents the combustion chamber inlet pressure, measured in psia; in T1 represents the combustion chamber inlet temperature in the Luxogener scale; T4 represents the combustion chamber outlet temperature in the Luxogener scale (R); and T5 represents the permissible emission concentration of nitrogen oxides in mg / m³. 3 ; This represents the relative molecular mass of the gas. This refers to the excess air coefficient in the combustion chamber. Theoretical air volume, in kg / s; for The relative molecular mass.

[0032] Preferably, after selection via T4, the excess air coefficient of the unit is... Once confirmed, the signal data is transmitted to the controller to adjust the excess air coefficient of the gas turbine unit under constant fuel flow.

[0033] Preferably, in step 2, the operating data includes combustion chamber inlet pressure, combustion chamber air mass flow rate, combustion chamber inlet temperature, combustion chamber outlet temperature, and air-fuel ratio data, which are obtained from the thermal balance simulation model.

[0034] Compared with related technologies, the present invention has the following beneficial effects:

[0035] This invention provides a control system and method for improving the efficiency of hydrogen-blended gas turbine units based on compliance with emission standards. Since the combustion temperature of hydrogen is higher than that of ordinary natural gas (whose main component is natural gas), within the safety margin of the gas turbine unit, blending hydrogen can increase the turbine inlet temperature to a certain extent. At the same time, by adjusting the system through SCR denitrification, the unit efficiency can be maximized while ensuring compliance with nitrogen oxide emissions. On the basis of compliance with emission standards and unit safety, hydrogen blending is achieved. Under certain hydrogen blending conditions, by testing and controlling data such as fuel flow rate, air flow rate, combustion temperature, pollutant emissions, and unit vibration, the turbine inlet temperature and exhaust temperature of the unit can be effectively controlled at a specific blending ratio, thereby maximizing the efficiency of the combined cycle unit. Attached Figure Description

[0036] Figure 1 A flowchart of the control method for improving the efficiency of hydrogen-blended gas turbine units based on achieving emission standards, provided by the present invention;

[0037] Figure 2 A graph showing the relationship between the hydrogen volume ratio and the carbon dioxide emission reduction ratio.

[0038] Figure 3 This is a diagram showing the simulation results of the basic load of a circulating unit;

[0039] Figure 4 This is a graph showing the relationship between the ammonia-to-nitrogen ratio and the denitrification efficiency. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1 A flowchart of the control method for improving the efficiency of hydrogen-blended gas turbine units based on achieving emission standards, provided by the present invention; Figure 2 A graph showing the relationship between the hydrogen volume ratio and the carbon dioxide emission reduction ratio. Figure 3 This is a diagram showing the simulation results of the basic load of a circulating unit; Figure 4 This is a graph showing the relationship between the ammonia-to-nitrogen ratio and the denitrification efficiency.

[0042] A control system for improving the efficiency of hydrogen-blended gas turbine units based on compliance with emission standards, comprising the gas turbine unit;

[0043] An SCR denitrification system installed in a waste heat boiler;

[0044] A parameter detection module is installed at each detection point to detect the corresponding detection parameters;

[0045] The controller enables hydrogen co-firing while ensuring emissions compliance and unit safety. Based on the hydrogen co-firing ratio, it controls the turbine inlet temperature and exhaust temperature of the gas turbine unit under a specific co-firing ratio by testing and controlling data on fuel flow, air flow, combustion temperature, pollutant emissions, and unit vibration. This achieves the highest efficiency of the gas turbine unit under the current co-firing ratio.

[0046] The parameter monitoring module includes a combustion chamber inlet pressure detection module, a combustion chamber air flow detection module, a combustion chamber inlet temperature detection module, a combustion chamber outlet temperature detection module, a carbon dioxide emission concentration detection module, and a vibration monitoring module.

[0047] The parameter monitoring module also includes a nitrogen oxide concentration detection module at the inlet of the SCR denitrification system and a nitrogen oxide emission concentration detection module at the outlet of the SCR denitrification system.

[0048] A control method for improving the efficiency of hydrogen-blended gas turbine units based on achieving emission standards includes the following steps:

[0049] Step 1: Determine the volume percentage of hydrogen needed for the computer group based on actual carbon reduction requirements.

[0050] First, based on the technical requirements for carbon emission reduction in gas-fired power plants, the existing hydrogen blending ratio of fuel is calculated and analyzed: if the unit needs to reduce carbon dioxide emissions by 10%, then 27% hydrogen by volume needs to be blended into the fuel. The method is as follows, taking natural gas from a certain power plant as an example:

[0051]

[0052] Table 1 Natural Gas Components

[0053]

[0054] These represent the molar masses of these components, respectively.

[0055] This indicates the amount of CO2 emitted during the complete combustion of methane;

[0056] This indicates the amount of CO2 emitted during the complete combustion of ethane;

[0057] Therefore, the total amount of CO2 produced from 1 kg of natural gas, including all its components, is 2.5874 kg; the lower heating value is 33.31 MJ / m³. 3 The density is 0.7225 kg / m³. 3 The carbon dioxide emission per unit of low-calorific-value fuel is 56.65 t / GJ. The carbon dioxide emission per unit of low-calorific-value fuel was calculated by blending natural gas with different proportions of hydrogen, and thus the following can be derived: Figure 2 The figure shows the ratio of hydrogen volume to carbon dioxide emission reduction.

[0058] Calculations show that if natural gas is blended with approximately 27% hydrogen by volume, the carbon dioxide content per unit of low-calorific-value fuel is 50.89 t / GJ, which can reduce carbon dioxide emissions by 10%.

[0059] When burning this blended fuel in existing units, the lower heating value and Wassell index need to be verified according to the following formula to see if they are within acceptable ranges.

[0060]

[0061] MWI – Warburg Index after temperature correction;

[0062] LHV – Lower heating value of fuel, Btu / scft;

[0063] Tg — Absolute temperature of a gas, Rankine scale, unit is °R;

[0064] SG—The specific gravity of fuel relative to air under ISO conditions;

[0065] The existing gas turbine Huabai index fluctuates within ±5%. If it changes within this range, the hydrogen blending ratio is acceptable, and step 2 is executed. If it exceeds this range, the hydrogen blending ratio needs to be reduced until it meets the ±5% range before executing step 2.

[0066] Step 2: Based on the operating data of the hydrogen-blended gas-fired power plant, perform numerical modeling and model correction for heat balance.

[0067] For existing hydrogen-blended gas-fired power plants, a heat balance numerical model of the compressor, combustion chamber, turbine, boiler, and steam turbine is performed. The model is then compared and corrected using power plant operating data under various loads to ensure that the heat balance model matches the actual power plant operating conditions by 99% under different loads.

[0068] Step 3: Correct the empirical formula for nitrogen oxide emissions from the gas turbine of the hydrogen-blended gas-fired power plant under different loads.

[0069] Under a fixed load (100% load as an example), based on the thermal balance simulation model of a hydrogen-blended gas turbine power plant, any formula (excluding correction coefficients) from formulas 1-3 in Table 2 is selected for calculation. The calculation of (nitrogen oxide emission concentration) is based on data such as combustion chamber inlet pressure, combustion chamber air mass flow rate, combustion chamber inlet temperature, combustion chamber outlet temperature, and air-fuel ratio, which are obtained from the thermal balance simulation model of the hydrogen-blended gas turbine power plant. At the same time, the following empirical formula (as shown in Table 2) is corrected by combining the actual nitrogen oxide emission data of the gas turbine under this load. The corrected formula for the allowable nitrogen oxide emission concentration of the hydrogen-blended gas turbine is as follows.

[0070]

[0071] Table 2 Formula Table (Revised)

[0072] Among them, P in This refers to the inlet pressure of the combustion chamber.

[0073] M in Mass flow rate of combustion chamber air, in kg / s;

[0074] T in R represents the combustion chamber inlet temperature.

[0075] T4 is the combustion chamber outlet temperature, R;

[0076] f is the air-fuel ratio;

[0077] The permissible emission concentration of nitrogen oxides, in mg / m³ 3 ;

[0078] This represents the relative molecular mass of the gas.

[0079] for The relative molecular mass;

[0080] Theoretical air volume, in kg / s;

[0081] This refers to the excess air coefficient in the combustion chamber.

[0082] For other loads, the nitrogen oxide emission values ​​for different loads were obtained by internal interpolation at 100% load, 75% load, and 50% load.

[0083] Step 4: Based on the relationship between ammonia injection and denitrification efficiency in the SCR denitrification system, calculate the allowable nitrogen oxide emission concentration of the gas turbine under fixed operating conditions.

[0084] Under different loads in a hydrogen-blended gas turbine power plant, the ammonia injection rate of the SCR denitrification system inside the waste heat boiler was adjusted to obtain the actual maximum SCR denitrification efficiency under different loads (while ensuring that the ammonia slip concentration should be less than 2.5 mg / m³). 3 )like Figure 4 The permissible nitrogen oxide emission concentration at the gas turbine outlet was then calculated by different denitrification efficiencies, as shown in Table 3.

[0085]

[0086] Table 3 Relationship between denitrification efficiency and permissible nitrogen oxide concentration at gas turbine outlet

[0087] Taking the base load (100% load) as an example, the SCR denitrification system of this unit adjusts the ammonia-nitrogen ratio by injecting ammonia (ensuring that the ammonia slip concentration should be less than 2.5 mg / m³). 3 The maximum SCR denitrification efficiency can reach 65%. Considering factors such as uneven ammonia injection flow field and ammonia slip, this patent reduces the denitrification efficiency setting by 5 percentage points from 65% (setting it to 60%). According to Table 3, since the local nitrogen oxide emission standard is 30 mg / m³... 3 Therefore, the permissible nitrogen oxide emission concentration of this hydrogen-blended gas turbine under basic load can be 75 mg / m³. 3 .

[0088] Step 5: Based on the empirical formula for nitrogen oxide emissions from the modified hydrogen-blended gas turbine, the turbine inlet temperature and excess air coefficient of the hydrogen-blended gas turbine are calculated, and the gas turbine adjustment is implemented.

[0089] Using the corrected formula obtained in step 3, and the allowable NOx emission concentration of the gas turbine calculated in step 4, the turbine inlet temperature T4 and the excess air coefficient of the combustion chamber are back-calculated. The relationship is as follows. Since the fuel composition is known to be fixed through step 1, the fuel flow rate under the determined load is also fixed. Therefore, according to the formula...

[0090]

[0091] The turbine inlet temperature T4 and the excess air coefficient of the combustion chamber can be calculated in reverse. The relationship between T4 and To achieve maximum unit efficiency, but considering the temperature tolerance of the unit's hot-end components and the boiler's temperature tolerance, the maximum T4 of the unit can be selected based on T. max Limitation – Take the smaller value between T4 (waste heat boiler side reverse thrust) and T4 (hot end component tolerance), where

[0092]

[0093] A higher T4 value results in a higher combined unit efficiency. Once T4 is selected, the excess air coefficient of the unit is... Once confirmed, the signal data is transmitted to the gas turbine control system to adjust the excess air coefficient of the unit under constant fuel flow.

[0094] Step 6: After the gas turbine adjustment is executed, monitor the nitrogen oxide emission concentration before and after denitrification in the SCR denitrification system. If the emission standard is met and the ammonia slip value meets the requirements, the gas turbine unit will maintain stable operation with the existing parameters. If the emission standard cannot be met, gradually increase the ammonia water injection volume of the SCR denitrification system. If the original denitrification efficiency and emission standard cannot be met, return to step 4.

[0095] After adjusting the excess air coefficient of the gas turbine unit, the change in the combustion turbine inlet temperature leads to an increase in the nitrogen oxide emission concentration at the gas turbine outlet (the ammonia-to-nitrogen ratio in the denitrification system changes, and the denitrification efficiency changes). Therefore, it is necessary to simultaneously monitor the nitrogen oxide emission concentrations at the inlet and outlet of the SCR denitrification system to confirm whether the existing SCR denitrification unit's ammonia injection can achieve the emission standards of the hydrogen-blended unit. If the emission standards can be met and the ammonia slip value meets the requirements, the gas turbine unit will maintain stable operation with the existing parameters. If the emission standards cannot be met (because there is a 5 percentage point denitrification efficiency margin reserved in step 4), the SCR ammonia injection rate will be gradually increased (but ensuring that the ammonia slip concentration is less than 2.5 mg / m³). 3 If the original denitrification efficiency (60%) and emission standards still cannot be achieved, then return to step 4:

[0096] At this point, taking the base load as an example, the SCR denitrification system of this gas turbine unit adjusts the ammonia-nitrogen ratio by injecting ammonia (ensuring that the ammonia slip concentration should be less than 2.5 mg / m³). 3 If the maximum achievable SCR denitrification efficiency is 59%, considering factors such as uneven ammonia injection flow field and ammonia slip, this method reduces this by 5 percentage points to set the unit efficiency (54% denitrification efficiency). Therefore, under this operating condition, the permissible nitrogen oxide emission concentration at the gas turbine outlet of this gas turbine unit can be set at 65.2 mg / m³. 3 Next, in step 5, the excess air coefficient of the unit is adjusted under constant fuel flow. At this time, due to the change in the combustion turbine inlet temperature, the nitrogen oxide emission concentration at the gas turbine outlet decreases (the ammonia-nitrogen ratio in the denitrification system changes, and the denitrification efficiency increases). Therefore, it is necessary to simultaneously monitor the nitrogen oxide emission concentrations at the inlet and outlet of the SCR denitrification system to confirm whether the existing SCR denitrification unit's ammonia injection can achieve the emission standards of the hydrogen-blended gas turbine unit. If the emission standards can be met and the ammonia slip value meets the requirements, the gas turbine unit will maintain stable operation with the existing parameters. If the emission standards still cannot be met (because there is a 5 percentage point denitrification efficiency margin reserved in step 4), the SCR ammonia injection rate will be gradually increased (but ensuring that the ammonia slip concentration is less than 2.5 mg / m³). 3If the original denitrification efficiency (54%) and emission standards cannot be achieved, return to step 4 for adjustment and control until emission standards are met and the ammonia slip value meets the requirements, then the gas turbine unit will maintain stable operation with the existing parameters.

[0097] Considering the unstable combustion state inside the gas turbine during start-up and shutdown, this patented control method is not recommended for use during these phases to improve unit safety. This method is primarily applicable to hydrogen-blended gas turbine units operating above 50% of their base load. When the unit load or fuel composition changes, adjustments must be made starting from step 1.

[0098] This invention provides a control system and method for improving the efficiency of hydrogen-blended gas turbine units based on compliance with emission standards. Since the combustion temperature of hydrogen is higher than that of ordinary natural gas (whose main component is natural gas), the turbine inlet temperature can be increased to a certain extent by blending hydrogen within the safety margin of the gas turbine unit. At the same time, by adjusting the system through SCR denitrification, the unit efficiency can be improved to the maximum extent while ensuring compliance with nitrogen oxide emissions, and the highest combined cycle efficiency under the same load can be obtained.

[0099] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A control method for improving efficiency of a hydrogen-doped gas turbine unit based on meeting emission standards, characterized in that, The method comprises the following steps: Step 1, according to the actual carbon reduction demand, calculate the volume percentage of hydrogen gas needed to be mixed by the unit; Step 2, based on the operation data of the hydrogen-doped gas power plant, carry out numerical modeling and model correction of heat balance; Step 3, correct the empirical formula of the gas turbine nitrogen oxide emission of the hydrogen-doped gas power plant under different loads; Step 4, based on the relationship between ammonia injection and denitration efficiency of the SCR denitration system, calculate the allowable nitrogen oxide emission concentration of the gas turbine under fixed conditions; Step 5, based on the modified empirical formula of nitrogen oxides emission of hydrogen-doped gas turbine, the allowable nitrogen oxides emission concentration of the gas turbine obtained by step 4 is used to inversely calculate the relationship between the turbine inlet temperature T4 and the excess air coefficient of the combustion chamber, and after T4 is selected, the excess air coefficient of the unit is determined Determination, signal data is transmitted to the controller, and the excess air coefficient of the gas turbine unit under the fixed fuel flow is adjusted; Step 6, after the adjustment of the gas turbine is implemented, monitor the nitrogen oxide emission concentration before and after the SCR denitration system; if the emission meets the standard and the ammonia escape value meets the requirements, the gas turbine unit maintains stable operation with the existing parameters; if the emission cannot meet the standard, gradually increase the amount of ammonia water injection of the SCR denitration system; if the original denitration efficiency and the standard emission cannot still be achieved, return to step 4.

2. The control method for improving efficiency of a hydrogen-doped gas turbine unit based on meeting emission standards according to claim 1, characterized in that, In step 2, the corrected heat balance model is consistent with the actual power plant operation under different loads, with a degree of coincidence of 99%.

3. The control method for improving efficiency of a hydrogen-doped gas turbine unit based on meeting emission standards according to claim 1, characterized in that, In the step 4, under different loads of the hydrogen-doped combustion power plant, the ammonia injection amount of the internal SCR denitration system of the waste heat boiler is adjusted to obtain the actual maximum SCR denitration efficiency under different loads, and ensure that the ammonia escape concentration should be less than 2.5 mg / m 3 .

4. The control method for improving efficiency of a hydrogen-doped gas turbine unit based on meeting emission standards according to claim 1, characterized in that, The empirical formula is ； ； Among them, P in T is the inlet pressure of the combustion chamber. in T4 is the combustion chamber inlet temperature; T5 is the combustion chamber outlet temperature. The permissible emission concentration of nitrogen oxides; This represents the relative molecular mass of the gas. This refers to the excess air coefficient in the combustion chamber. This is the theoretical air volume; for The relative molecular mass.

5. The control method for improving efficiency of a hydrogen-doped gas turbine unit based on meeting emission standards according to claim 1, characterized in that, In step 2, the operation data includes combustion chamber inlet pressure, combustion chamber air mass flow, combustion chamber inlet temperature, combustion chamber outlet temperature and fuel-air ratio data, which are obtained from the heat balance simulation model.

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