Steam turbine condition monitoring methods, devices and electronic equipment

Abstract

This invention discloses a method, apparatus, and electronic device for monitoring the condition of a steam turbine. The method includes: acquiring real-time operating parameters of the steam turbine under test; determining the real-time absolute electrical efficiency of the steam turbine based on the real-time operating parameters; determining the energy efficiency level of the steam turbine based on the efficiency range to which the real-time absolute electrical efficiency belongs; wherein different efficiency ranges correspond to different energy efficiency levels; and adjusting the real-time operating parameters of the steam turbine to improve the real-time absolute electrical efficiency. In this invention's steam turbine condition monitoring method, the real-time energy efficiency level and real-time absolute electrical efficiency of the steam turbine are acquired based on its real-time operating parameters, ensuring the timeliness of steam turbine performance data acquisition and enabling operators to promptly understand the current energy efficiency status of the steam turbine. Through real-time control of the steam turbine's operating parameters, the energy utilization efficiency of the steam turbine is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steam turbine operation control, and particularly relates to a steam turbine state monitoring method and device and electronic equipment. BACKGROUND

[0002] The steam turbine is a kind of rotary steam power device, which is widely used in modern energy production process, involving power, metallurgy, petroleum, chemical industry and ship industry.

[0003] During the operation of the steam turbine, the operation state of the steam turbine needs to be monitored to avoid the failure of the steam turbine. In the prior art, the state monitoring of the steam turbine is carried out in combination with the whole steam turbine generator unit, such as monitoring the operation state, vibration, expansion, oil level and the like in the steam turbine system. At the same time, it is mainly carried out from the perspective of fault monitoring, and the post-evaluation is adopted after the fault occurs. Such data acquisition has the disadvantage of lag, and the acquired data and the operation state do not correspond in real time. The performance evaluation method and the control method of the steam turbine in the prior art can only play a limited guiding role in production. SUMMARY

[0004] The present application provides a steam turbine state monitoring method, device and electronic equipment to solve the problem of low real-time performance of the steam turbine state monitoring method in evaluating the performance of the steam turbine and the control method.

[0005] In a first aspect, the present application provides a steam turbine state monitoring method, comprising:

[0006] obtaining real-time operation parameters of a to-be-tested steam turbine;

[0007] determining real-time absolute electric efficiency of the to-be-tested steam turbine according to the real-time operation parameters;

[0008] determining energy efficiency grade of the to-be-tested steam turbine according to an efficiency interval to which the real-time absolute electric efficiency belongs; wherein different efficiency intervals correspond to different energy efficiency grades;

[0009] adjusting the real-time operation parameters of the steam turbine to improve the real-time absolute electric efficiency.

[0010] Optionally, after obtaining the real-time operation parameters of the to-be-tested steam turbine, the method further comprises:

[0011] performing a preprocessing operation on the real-time operation parameters to obtain a real-time operation parameter set; the preprocessing operation comprises at least one of judging, screening, supplementing, converting and marking;

[0012] The determination of the real-time absolute electric efficiency of the to-be-tested steam turbine according to the real-time operation parameters comprises:

[0013] determining a real-time absolute electric efficiency of the to-be-tested steam turbine according to the real-time operation parameter set.

[0014] Optionally, the adjusting the real-time operation parameter of the steam turbine to improve the real-time absolute electric efficiency comprises:

[0015] acquiring an adjustable parameter of the steam turbine according to the real-time operation parameter; the adjustable parameter comprises at least one of a main steam admission flow, an admission temperature, an admission pressure, an exhaust steam temperature and an exhaust steam pressure;

[0016] adjusting the adjustable parameter of the steam turbine to improve the real-time absolute electric efficiency.

[0017] Optionally, the real-time operation parameter comprises a power parameter and an admission and exhaust parameter of the steam turbine;

[0018] the acquiring the real-time absolute electric efficiency of the to-be-tested steam turbine according to the real-time operation parameter comprises:

[0019] acquiring a generator efficiency of the steam turbine according to the power parameter;

[0020] acquiring a mechanical efficiency of the steam turbine according to the power parameter;

[0021] acquiring a relative internal efficiency of the steam turbine according to the power parameter and the admission and exhaust parameter;

[0022] acquiring the real-time absolute electric efficiency of the steam turbine according to a product of the generator efficiency, the mechanical efficiency and the relative internal efficiency.

[0023] Optionally, the power parameter comprises an actual output electric power of the to-be-tested steam turbine and an actual shaft power of the to-be-tested steam turbine;

[0024] the acquiring the generator efficiency of the steam turbine according to the power parameter comprises:

[0025] acquiring the generator efficiency of the steam turbine according to a ratio of the actual output electric power of the to-be-tested steam turbine and the actual shaft power of the to-be-tested steam turbine.

[0026] Optionally, the power parameter comprises an actual shaft power of the to-be-tested steam turbine and a theoretical mechanical output power of the to-be-tested steam turbine;

[0027] the acquiring the mechanical efficiency of the steam turbine according to the power parameter comprises:

[0028] acquiring the mechanical efficiency of the steam turbine according to a ratio of the actual shaft power of the to-be-tested steam turbine and the theoretical mechanical output power of the to-be-tested steam turbine.

[0029] Optionally, the power parameter includes: the internal power of the turbine under test;

[0030] The steam inlet and outlet parameters include: the input heat of the i-th type of steam in the turbine under test and the output heat of the i-th type of steam in the turbine under test; wherein, the i-th type of steam includes: main steam and reheat steam;

[0031] The step of obtaining the relative internal efficiency of the steam turbine based on the power parameters and the intake and exhaust parameters includes:

[0032] The heat consumed by the steam turbine during operation is obtained based on the difference between the heat input and output of the i-th type of steam.

[0033] The relative internal efficiency of the steam turbine is obtained by the ratio of its internal power to the heat consumed during operation.

[0034] Optionally, after obtaining the real-time operating parameters of the turbine under test, the method further includes:

[0035] Obtain the rated design parameters of the turbine under test; wherein, the rated design parameters of the turbine under test include: the unit average load, main steam rated parameters, condenser rated design vacuum degree and turbine generator unit rated design power generation heat rate of the turbine under test;

[0036] The theoretical optimal absolute electrical efficiency of the turbine under test is determined based on the rated design parameters.

[0037] The adjustment of the real-time operating parameters of the steam turbine to improve the real-time absolute electrical efficiency includes:

[0038] Adjust the real-time operating parameters of the steam turbine to reduce the difference between the real-time absolute electrical efficiency and the theoretical optimal absolute electrical efficiency.

[0039] According to another aspect of the present invention, a steam turbine condition monitoring device is provided, comprising:

[0040] The parameter acquisition module is used to acquire the real-time operating parameters of the steam turbine under test;

[0041] The real-time absolute electrical efficiency acquisition module is used to determine the real-time absolute electrical efficiency of the steam turbine under test based on the real-time operating parameters.

[0042] The energy efficiency rating acquisition module is used to determine the energy efficiency rating of the steam turbine under test based on the efficiency range to which the real-time absolute electrical efficiency belongs.

[0043] The real-time operating parameter adjustment module is used to adjust the real-time operating parameters of the steam turbine to improve the real-time absolute electrical efficiency.

[0044] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0045] At least one processor; and

[0046] A memory communicatively connected to the at least one processor; wherein,

[0047] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the turbine condition monitoring method according to any embodiment of the present invention.

[0048] This invention discloses a turbine condition monitoring method, apparatus, and electronic device. The turbine condition monitoring method acquires real-time operating parameters of the turbine under test to obtain its real-time absolute electrical efficiency. Then, it determines the energy efficiency level of the turbine based on the range of the real-time absolute electrical efficiency. Finally, it adjusts the turbine's real-time operating parameters to improve its real-time absolute electrical efficiency. This invention improves the timeliness of turbine performance evaluation by acquiring the turbine's real-time absolute electrical efficiency based on its real-time operating parameters. While ensuring data timeliness, the acquired energy efficiency level provides a direct quantitative result for turbine energy efficiency evaluation. By continuously acquiring and adjusting the turbine's real-time operating parameters, the real-time absolute electrical efficiency is continuously optimized, promoting a continuous real-time improvement in turbine energy efficiency. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 A flowchart of a turbine condition monitoring method provided in an embodiment of the present invention;

[0051] Figure 2 A flowchart of another turbine condition monitoring method provided in an embodiment of the present invention;

[0052] Figure 3 A flowchart of another turbine condition monitoring method provided in an embodiment of the present invention;

[0053] Figure 4 A flowchart of another turbine condition monitoring method provided in an embodiment of the present invention;

[0054] Figure 5A flowchart of another turbine condition monitoring method provided in an embodiment of the present invention;

[0055] Figure 6 A flowchart of another turbine condition monitoring method provided in an embodiment of the present invention;

[0056] Figure 7 This is a schematic diagram of the structure of a steam turbine condition monitoring device provided in an embodiment of the present invention;

[0057] Figure 8 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0058] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0059] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0060] Figure 1 This is a flowchart illustrating a turbine condition monitoring method provided in an embodiment of the present invention. This embodiment is applicable to real-time monitoring of turbine conditions. The method can be executed by a turbine condition monitoring device, which can be implemented in hardware and / or software. Figure 1 As shown, the method includes:

[0061] S101. Obtain the real-time operating parameters of the turbine under test.

[0062] Real-time operating parameters of the steam turbine are collected for steam turbine condition monitoring.

[0063] For example, the real-time operating parameters of the steam turbine include: the main steam inlet parameters, exhaust parameters, reheat steam parameters, and generator output power.

[0064] Among them, the main steam inlet parameters refer to the parameters of the steam entering the high-pressure cylinder of the steam turbine, including steam temperature and steam pressure.

[0065] Exhaust parameters refer to the parameters of the steam discharged from the low-pressure cylinder of the steam turbine. The temperature of the steam discharged from the low-pressure cylinder is collected; the exhaust temperature affects the turbine's thermal efficiency and the condenser's performance. The pressure of the steam discharged from the low-pressure cylinder is also collected; the lower the exhaust pressure, the more complete the turbine's expansion process and the higher its efficiency.

[0066] Reheat steam parameters refer to the parameters of steam after it has done work in the high-pressure cylinder, been heated by the reheater, and then enters the intermediate-pressure cylinder. Reheat steam parameters include reheat steam temperature and reheat steam pressure.

[0067] The power output of a generator refers to the electrical output generated by a turbine driving a generator.

[0068] S102. Determine the real-time absolute electrical efficiency of the turbine under test based on the real-time operating parameters.

[0069] Specifically, the real-time absolute electrical efficiency of the steam turbine is obtained by using the collected real-time operating parameters. The absolute electrical efficiency of a steam turbine refers to the efficiency with which the steam turbine converts the thermal energy of fuel into electrical energy.

[0070] For example, a mathematical model for calculating the real-time absolute electrical efficiency of a steam turbine is established based on the characteristics of its real-time absolute electrical efficiency. This model is built upon the turbine's operating principle, energy balance principle, and standard specifications: a turbine energy efficiency model is established based on the steam turbine generator set's operation process, the steam turbine's thermodynamic performance acceptance test procedures, and the calculation methods for the technical and economic indicators of thermal power plants. This turbine energy efficiency model is a real-time absolute electrical efficiency mathematical model, capable of accurately calculating the electrical efficiency of the steam turbine generator set. Real-time operating parameters are input into the real-time absolute electrical efficiency mathematical model, and the output result is the real-time absolute electrical efficiency of the steam turbine under test.

[0071] S103. Determine the energy efficiency level of the turbine under test based on the efficiency range to which the real-time absolute electrical efficiency belongs.

[0072] Different efficiency ranges correspond to different energy efficiency levels.

[0073] Specifically, different models of steam turbines or different steam turbine application platforms have different criteria for judging steam turbine energy efficiency. The specific range of energy efficiency levels is divided based on the steam turbine's performance characteristics, industry standards, or the company's internal energy efficiency management policies. Optionally, by classifying energy efficiency levels, operators can more easily identify inefficiently operating steam turbines and prioritize their optimization or upgrading.

[0074] For example, according to the energy efficiency rating of steam turbines, when the power generation efficiency is between 23% and 28%, it is classified as Level IV energy efficiency; 28% to 33% is classified as Level III; 33% to 40% is classified as Level II; and 40% is classified as Level I. When the real-time absolute electrical efficiency of the steam turbine under test is at Level IV, the turbine's operation is not ideal. Low turbine efficiency means more fuel is consumed, potentially generating more emissions and causing a significant impact on the environment. Management personnel need to check the turbine's operating status at this time to troubleshoot or optimize it. When the real-time absolute electrical efficiency of the steam turbine under test is at Level I, extremely high energy efficiency means extremely low fuel consumption and emissions. Management personnel can determine that the turbine's operating condition is optimal at this time.

[0075] S104. Adjust the real-time operating parameters of the steam turbine to improve the real-time absolute electrical efficiency.

[0076] Specifically, the real-time absolute electrical efficiency of a steam turbine reflects its real-time operating status. When no equipment malfunctions, adjusting the turbine's real-time operating parameters to improve combustion efficiency, reduce heat loss, and optimize steam flow paths can increase real-time absolute electrical efficiency, thereby improving the turbine's overall operating efficiency.

[0077] For example, adjusting the real-time operating parameters of a steam turbine includes: adjusting the steam pressure, which can increase power generation by adjusting the steam inlet and exhaust pressures; adjusting the steam temperature, i.e., adjusting the steam inlet and exhaust temperatures; and adjusting the turbine blade speed, which, while ensuring stable unit operation, can increase output power and thus improve power generation efficiency.

[0078] Optionally, turbine condition monitoring can also be performed based on historical parameters of absolute electrical efficiency. After calculating the real-time absolute electrical efficiency, the turbine's operating status can be diagnosed and its real-time operating parameters adjusted based on historical changes in absolute electrical efficiency, thereby promptly detecting energy efficiency degradation and improving turbine energy efficiency. If, based on changes in the historical absolute electrical efficiency parameters of the turbine under test, a sudden drop in real-time absolute electrical efficiency is observed, the turbine may have experienced a sudden fault. In this case, relevant inspections, troubleshooting, and adjustments to real-time operating parameters should be performed to improve real-time absolute electrical efficiency. If, based on changes in the historical absolute electrical efficiency parameters of the turbine under test, a decreasing trend in real-time absolute electrical efficiency is observed, it can be determined that the turbine has a gradual fault or performance degradation. This decrease is not sudden but gradually manifests over time. Causes of this include: aging and wear of components such as blades and bearings as operating time increases, leading to a decrease in turbine absolute electrical efficiency over time. In addition to adjusting the real-time operating parameters of the steam turbine to improve its real-time absolute electrical efficiency, necessary maintenance and replacement work are also carried out simultaneously. The steam turbine condition monitoring method provided in this embodiment judges the operating status of the steam turbine based on historical data of real-time absolute electrical efficiency, promptly identifies the causes of condition deterioration and proposes optimization strategies, thereby reducing downtime and maintenance costs.

[0079] This invention provides a method for monitoring the condition of a steam turbine. The method acquires real-time operating parameters of the steam turbine under test to obtain its real-time absolute electrical efficiency. Then, the energy efficiency level of the steam turbine is determined based on the range in which the real-time absolute electrical efficiency falls. Furthermore, the real-time operating parameters of the steam turbine are adjusted to improve its real-time absolute electrical efficiency. This invention improves the timeliness of steam turbine performance evaluation by acquiring the real-time absolute electrical efficiency based on the turbine's real-time operating parameters. Simultaneously, while ensuring data timeliness, the acquired energy efficiency level provides an intuitive quantitative result for steam turbine energy efficiency evaluation. When adjusting the real-time operating parameters, the real-time absolute electrical efficiency of the steam turbine is continuously optimized through real-time parameter acquisition and adjustment, promoting the continuous real-time improvement of steam turbine energy efficiency.

[0080] Based on the above embodiments, Figure 2 A flowchart of another turbine condition monitoring method provided in an embodiment of the present invention is shown below. Figure 2 As shown, the method includes:

[0081] S201. Obtain the real-time operating parameters of the turbine under test.

[0082] S202. Perform preprocessing operations on the real-time operating parameters to obtain a set of real-time operating parameters.

[0083] Preprocessing operations include at least one of the following: judgment, filtering, supplementation, transformation, and labeling.

[0084] Specifically, the acquired real-time operating parameters are subjected to data quality testing and data standardization governance. The completeness, standardization, and accuracy of the real-time operating parameters are preprocessed, including judging, filtering, supplementing, transforming, and labeling the acquired steam turbine production and operation data, and forming a set of real-time operating parameters based on the data that meet the governance requirements.

[0085] The evaluation process includes: checking the validity of the data; optionally, excluding obviously erroneous or outlier real-time operating parameters; selecting parameters important for energy efficiency assessment; supplementing data by using model predictions or historical data interpolation if some key data is missing; converting real-time operating parameters into a form suitable for analysis, optionally converting temperature from Celsius to Fahrenheit or standardizing units; and labeling real-time operating parameters with tags or categories for easier subsequent processing and analysis.

[0086] For example, real-time operating parameters are normalized to convert them into a unified dimension or range, generating a high-quality set of real-time operating parameters. This set accurately reflects the operating status of the turbine under test. When normalizing the real-time operating parameters, an appropriate normalization method is selected based on the characteristics of the data. Optionally, when the turbine outlet steam temperature varies significantly, a linear transformation is used to limit the range of operating status parameters to reduce noise.

[0087] S203. Determine the real-time absolute electrical efficiency of the turbine under test based on the real-time operating parameter set.

[0088] The real-time operating parameter set is a set of pre-processed real-time operating parameters. The real-time operating parameter set can accurately reflect the operating status of the turbine under test. Determining the real-time absolute electrical efficiency of the turbine under test based on the real-time operating parameter set is beneficial to improving the accuracy of the obtained real-time absolute electrical efficiency.

[0089] S204. Determine the energy efficiency level of the turbine under test based on the efficiency range to which the real-time absolute electrical efficiency belongs.

[0090] S205. Adjust the real-time operating parameters of the steam turbine to improve the real-time absolute electrical efficiency.

[0091] Based on the above embodiments, Figure 3 A flowchart of another turbine condition monitoring method provided in an embodiment of the present invention is shown below. Figure 3 As shown, the method includes:

[0092] S301. Obtain the real-time operating parameters of the turbine under test.

[0093] S302. Determine the real-time absolute electrical efficiency of the turbine under test based on the real-time operating parameters.

[0094] S303. Determine the energy efficiency level of the turbine under test based on the efficiency range to which the real-time absolute electrical efficiency belongs.

[0095] S304. Obtain the adjustable parameters of the steam turbine based on real-time operating parameters.

[0096] Adjustable parameters include at least one of the following: main steam inlet flow rate, inlet steam temperature, inlet steam pressure, outlet steam temperature, and outlet steam pressure;

[0097] Specifically, by filtering real-time operating parameters, adjustable parameters of the steam turbine are obtained. These adjustable parameters are those that can be directly optimized for the absolute electrical efficiency of the steam turbine through adjustment. In regulating the main steam inlet flow rate, controlling the amount of steam entering the turbine affects its power output and efficiency. In regulating the inlet steam temperature, higher inlet steam temperatures result in higher turbine thermal efficiency. In regulating the inlet steam pressure, increasing the inlet steam pressure increases steam density and flow rate, thereby increasing power output. In regulating the outlet steam temperature and pressure, these parameters affect the steam pressure at the turbine's exhaust port. Reducing back pressure can improve turbine efficiency because more thermal energy is converted into mechanical energy.

[0098] S305. Adjust the adjustable parameters of the steam turbine to improve the real-time absolute electrical efficiency.

[0099] Specifically, increasing the main steam inlet flow rate within the adjustable threshold range improves the turbine's real-time absolute electrical efficiency. However, excessive steam inlet flow rate exceeding the adjustable threshold range may lead to turbine overheating or overload. Increasing the inlet temperature within the adjustable threshold range improves the turbine's real-time absolute electrical efficiency. Increasing the inlet pressure within the adjustable threshold range improves the turbine's real-time absolute electrical efficiency. Decreasing the discharge steam temperature and pressure within the adjustable threshold ranges for both discharge steam temperature and pressure improves the turbine's real-time absolute electrical efficiency.

[0100] Optionally, the adjustable threshold ranges for main steam inlet flow rate, inlet steam temperature, inlet steam pressure, outlet steam temperature, and outlet steam pressure are determined based on the performance parameters of the turbine under test and the threshold of real-time absolute electrical efficiency.

[0101] Based on the above embodiments, Figure 4A flowchart of another turbine condition monitoring method provided in an embodiment of the present invention is shown below. Figure 4 As shown, the real-time operating parameters include the turbine's power parameters and intake and exhaust parameters. The turbine condition monitoring methods include:

[0102] S401. Obtain the real-time operating parameters of the turbine under test.

[0103] S402. Obtain the generator efficiency of the steam turbine based on the power parameters.

[0104] The generator efficiency of a steam turbine refers to the efficiency with which the generator converts mechanical energy into electrical energy. The generator efficiency is affected by the generator's design, operating conditions, and maintenance. Generator efficiency can be calculated as the ratio of the actual output electrical power to the actual shaft power of the steam turbine under test.

[0105] S403. Obtain the mechanical efficiency of the steam turbine based on the power parameters.

[0106] The mechanical efficiency of a steam turbine refers to its efficiency in converting thermal energy into mechanical energy. The mechanical efficiency of a steam turbine is affected by factors such as turbine design, steam parameters, friction losses, and leakage losses. Mechanical efficiency can be calculated by the ratio of the actual shaft power of the steam turbine under test to its theoretical mechanical output power.

[0107] S404. Obtain the relative internal efficiency of the steam turbine based on the power parameters and the steam inlet and outlet parameters.

[0108] Relative internal efficiency refers to the energy conversion efficiency during the flow process inside a steam turbine. It is typically calculated by comparing actual energy loss with the theoretical minimum energy loss. Energy losses include friction loss, eddy current loss, and impact loss. The relative internal efficiency of a steam turbine can be obtained from the ratio of its internal power to the heat consumed during operation.

[0109] S405. Obtain the real-time absolute electrical efficiency of the steam turbine based on the product of the generator efficiency, mechanical efficiency, and relative internal efficiency.

[0110] Specifically, the absolute electrical efficiency of a steam turbine refers to the overall conversion efficiency from fuel thermal energy to electrical energy. It reflects the energy loss throughout the entire conversion process. Real-time absolute electrical efficiency is calculated by multiplying the generator efficiency, mechanical efficiency, and relative internal efficiency.

[0111] S406. Determine the energy efficiency level of the turbine under test based on the efficiency range to which the real-time absolute electrical efficiency belongs.

[0112] S407. Adjust the real-time operating parameters of the steam turbine to improve the real-time absolute electrical efficiency.

[0113] Based on the above embodiments, Figure 5 A flowchart of another turbine condition monitoring method provided in an embodiment of the present invention is shown below. Figure 5 As shown, the method includes:

[0114] S501. Obtain the real-time operating parameters of the turbine under test.

[0115] S502. Obtain the generator efficiency of the turbine based on the ratio of the actual output electrical power of the turbine under test to the actual shaft power of the turbine under test.

[0116] The power parameters include: the actual output electrical power of the turbine under test and the actual shaft power of the turbine under test.

[0117] Specifically, the expression for the generator efficiency of a steam turbine is:

[0118]

[0119] Where, η G P represents the generator efficiency of the steam turbine, expressed as a percentage (%). G P represents the actual output electrical power of the steam turbine, in kW. M This indicates the actual shaft power of the steam turbine, in kW.

[0120] For example, when the actual output electrical power P of the steam turbine G The actual shaft power P of the steam turbine is 15743.8 kW. M At a power output of 16065.1 kW, the turbine's generator efficiency η G It is 98%.

[0121] S503. Obtain the mechanical efficiency of the steam turbine by the ratio of its actual shaft power to its theoretical mechanical output power.

[0122] The power parameters include: the actual shaft power of the turbine under test and the theoretical mechanical output power of the turbine under test.

[0123] Specifically, the expression for the mechanical efficiency of a steam turbine is:

[0124]

[0125] Where, η M P represents mechanical efficiency, expressed as a percentage. M P represents the actual shaft power of the steam turbine, in kW. M,A This represents the theoretical mechanical output power of the steam turbine, expressed in kW.

[0126] For example, when the actual shaft power P of the steam turbine M The theoretical mechanical output power P of the reheat turbine is 16065.1 kW. M,AWhen the power is 16227.4 kW, the mechanical efficiency η M 99%.

[0127] S504. Obtain the heat consumed by the steam turbine during operation based on the difference between the input and output heat of the i-th type of steam. Obtain the relative internal efficiency of the steam turbine based on the ratio of its internal power to the heat consumed during operation.

[0128] Power parameters include: the internal power of the turbine under test;

[0129] The steam inlet and outlet parameters include: the input heat of the i-th type of steam in the turbine under test and the output heat of the i-th type of steam in the turbine under test; wherein, the i-th type of steam includes: main steam and reheat steam.

[0130] Specifically, the expression for the relative internal efficiency of a steam turbine is:

[0131]

[0132] Among them, P Q The power output of the steam turbine is expressed in kW and m. i,in H represents the inlet flow rate of the i-th type of steam in the steam turbine, in kg / h. i,in The enthalpy of the i-th type of steam inlet of the steam turbine is expressed in kJ / kg; m i,out H represents the outlet flow rate of the i-th type of steam (or condensate) from the steam turbine, in kg / h. i,out This represents the outlet enthalpy of the i-th type of steam (or condensate) from the steam turbine, in kJ / kg.

[0133] S505. Obtain the real-time absolute electrical efficiency of the steam turbine based on the product of the generator efficiency, mechanical efficiency, and relative internal efficiency.

[0134] Specifically, the expression for the real-time absolute electrical efficiency of a steam turbine is:

[0135] η E =η Q ×η M ×η G

[0136] Where, η E The absolute electrical efficiency of a steam turbine is expressed as % (η). Q Indicates the relative internal efficiency of a steam turbine, %; η M Indicates mechanical efficiency, %; η G This represents generator efficiency, expressed as a percentage.

[0137] For example, when the relative internal efficiency η of the steam turbine Q The mechanical efficiency η is 26.93%. M The generator efficiency η is 99%.G When the efficiency is 98%, the absolute electrical efficiency η of the steam turbine is... E It is 26.12%.

[0138] S506. Determine the energy efficiency level of the turbine under test based on the efficiency range to which the real-time absolute electrical efficiency belongs.

[0139] S507. Adjust the real-time operating parameters of the steam turbine to improve the real-time absolute electrical efficiency.

[0140] Based on the above embodiments, Figure 6 A flowchart of another turbine condition monitoring method provided in an embodiment of the present invention is shown below. Figure 6 As shown, the method includes:

[0141] S601. Obtain the real-time operating parameters of the turbine under test.

[0142] S602. Obtain the rated design parameters of the turbine under test.

[0143] The rated design parameters of the turbine under test include: the average load of the turbine under test, the rated parameters of the main steam, the rated design vacuum of the condenser, and the rated design power generation heat rate of the turbine generator set.

[0144] Specifically, when obtaining the rated design parameters of the turbine under test, the unit average load of the turbine under test is the long-term average operating load expected during the turbine's design; the rated main steam parameters are the steam conditions required for the normal operation of the turbine, including: rated main steam pressure and temperature parameters. The rated design vacuum of the condenser affects the turbine's thermal efficiency and power output, including: the vacuum level expected during the condenser's design; the rated design heat consumption rate of the turbine generator set is an efficiency indicator for converting fuel thermal energy into electrical energy under rated operating conditions.

[0145] S603. Determine the theoretical optimal absolute electrical efficiency of the turbine under test based on the rated design parameters.

[0146] The theoretical optimal absolute electrical efficiency is determined based on the rated design parameters of the steam turbine. The theoretical optimal absolute electrical efficiency represents the highest efficiency of the steam turbine under optimal design conditions and ideal operating conditions.

[0147] S604. Determine the real-time absolute electrical efficiency of the turbine under test based on the real-time operating parameters.

[0148] S605. Determine the energy efficiency level of the turbine under test based on the efficiency range to which the real-time absolute electrical efficiency belongs.

[0149] S606. Adjust the real-time operating parameters of the steam turbine to reduce the difference between the real-time absolute electrical efficiency and the theoretical optimal absolute electrical efficiency.

[0150] Specifically, the energy efficiency of a steam turbine in actual operation is evaluated by comparing its real-time absolute electrical efficiency with the theoretical optimal absolute electrical efficiency. The difference between the real-time and theoretical optimal absolute electrical efficiencies is reduced by adjusting the turbine's real-time operating parameters. If the actual operating efficiency is lower than the theoretical optimal efficiency, it may indicate a turbine malfunction or performance degradation. Adjusting turbine operating parameters, such as increasing or decreasing steam flow, adjusting steam pressure and temperature, and optimizing condenser vacuum, can reduce the difference between the real-time and theoretical optimal absolute electrical efficiencies, thereby improving the turbine's energy efficiency.

[0151] For example, if the theoretical optimal absolute electrical efficiency of the steam turbine is 35%, and the absolute electrical efficiency is 26.12% when the main steam inlet flow rate is 67.26 kg / h, then adjusting the main steam inlet flow rate to 68.15 kg / h will result in an absolute electrical efficiency of 29.21%.

[0152] Based on the above embodiments, Figure 7 This is a schematic diagram of a steam turbine condition monitoring device provided in an embodiment of the present invention. Figure 7 As shown, the device includes: a parameter acquisition module 01, used to acquire the real-time operating parameters of the turbine under test; a real-time absolute electrical efficiency acquisition module 02, used to determine the real-time absolute electrical efficiency of the turbine under test based on the real-time operating parameters; an energy efficiency level acquisition module 03, used to determine the energy efficiency level of the turbine under test based on the efficiency range to which the real-time absolute electrical efficiency belongs; and a real-time operating parameter adjustment module 04, used to adjust the real-time operating parameters of the turbine to improve the real-time absolute electrical efficiency.

[0153] The turbine condition monitoring device provided in this embodiment of the invention can execute the turbine condition monitoring method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method.

[0154] Figure 8 This is a schematic diagram of an electronic device provided in an embodiment of the present invention. The electronic device is used to implement the turbine condition monitoring method of the above embodiments of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0155] like Figure 8 As shown, the electronic device includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded into the RAM 13 from storage unit 18. The RAM 13 can also store various programs and data required for the operation of the electronic device. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0156] Multiple components in the electronic device are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, optical disk, etc.; and a communication unit 19, such as a network card, modem, wireless transceiver, etc. The communication unit 19 allows the electronic device to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0157] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as steam turbine condition monitoring methods.

[0158] In some embodiments, the turbine condition monitoring method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on an electronic device via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the turbine condition monitoring method described above may be performed. Optionally, in other embodiments, processor 11 may be configured to perform the turbine condition monitoring method by any other suitable means (e.g., by means of firmware).

[0159] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transferring data and instructions to the storage system, the at least one input device, and the at least one output device.

[0160] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0161] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Optionally, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0162] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0163] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0164] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0165] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0166] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method of monitoring the condition of a steam turbine, characterised by, The method comprises: acquiring real-time operation parameters of a turbine to be measured; determining real-time absolute electric efficiency of the turbine to be measured according to the real-time operation parameters; determining energy efficiency grade of the turbine to be measured according to an efficiency interval to which the real-time absolute electric efficiency belongs; different efficiency intervals correspond to different energy efficiency grades; adjusting the real-time operation parameters of the turbine to improve the real-time absolute electric efficiency; the real-time operation parameters comprise power parameters and inlet and outlet steam parameters of the turbine; the determining of the real-time absolute electric efficiency of the turbine to be measured according to the real-time operation parameters comprises: acquiring generator efficiency of the turbine according to the power parameters; acquiring mechanical efficiency of the turbine according to the power parameters; acquiring relative internal efficiency of the turbine according to the power parameters and the inlet and outlet steam parameters; acquiring the real-time absolute electric efficiency according to the product of the generator efficiency, the mechanical efficiency and the relative internal efficiency.

2. The method of claim 1, wherein, after the acquiring of the real-time operation parameters of the turbine to be measured, the method further comprises: performing pre-processing operation on the real-time operation parameters to obtain a real-time operation parameter set; the pre-processing operation comprises at least one of judging, screening, supplementing, converting and marking; the determining of the real-time absolute electric efficiency of the turbine to be measured according to the real-time operation parameters comprises: determining the real-time absolute electric efficiency of the turbine to be measured according to the real-time operation parameter set.

3. The method of claim 1, wherein, the adjusting of the real-time operation parameters of the turbine to improve the real-time absolute electric efficiency comprises: acquiring adjustable parameters of the turbine according to the real-time operation parameters; the adjustable parameters comprise at least one of main steam inlet flow, inlet steam temperature, inlet steam pressure, outlet steam temperature and outlet steam pressure; adjusting the adjustable parameters of the turbine to improve the real-time absolute electric efficiency.

4. The method of claim 1, wherein, the power parameters comprise actual output electric power of the turbine to be measured and actual shaft power of the turbine to be measured; the acquiring of the generator efficiency of the turbine according to the power parameters comprises: acquiring the generator efficiency of the turbine according to the ratio of the actual output electric power of the turbine to be measured to the actual shaft power of the turbine to be measured.

5. The method of claim 1, wherein, the power parameters comprise actual shaft power of the turbine to be measured and theoretical mechanical output power of the turbine to be measured; the acquiring of the mechanical efficiency of the turbine according to the power parameters comprises: acquiring the mechanical efficiency of the turbine according to the ratio of the actual shaft power of the turbine to be measured to the theoretical mechanical output power of the turbine to be measured.

6. The method of claim 1, wherein, the power parameters comprise internal power of the turbine to be measured; the inlet and outlet steam parameters comprise input heat of the i-th steam of the turbine to be measured and output heat of the i-th steam of the turbine to be measured; the i-th steam comprises main steam and reheated steam; the acquiring of the relative internal efficiency of the turbine according to the power parameters and the inlet and outlet steam parameters comprises: acquiring heat consumed in the working process of the turbine according to the difference between the input and output heat of the i-th steam of the turbine; acquiring the relative internal efficiency of the turbine according to the ratio of the internal power of the turbine to the heat consumed in the working process.

7. The method of claim 1, wherein, The obtaining of the real-time operation parameter of the to-be-tested steam turbine further comprises: obtaining rated design parameters of the to-be-tested steam turbine; wherein the rated design parameters of the to-be-tested steam turbine comprise: unit average load of the to-be-tested steam turbine, main steam rated parameters, rated design vacuum degree of a condenser, and rated design power generation heat consumption rate of a steam turbine generator unit; determining a theoretical optimal absolute electric efficiency of the to-be-tested steam turbine according to the rated design parameters; the adjusting of the real-time operation parameter of the steam turbine to improve the real-time absolute electric efficiency comprises: adjusting the real-time operation parameter of the steam turbine to reduce the difference between the real-time absolute electric efficiency and the theoretical optimal absolute electric efficiency.

8. A steam turbine condition monitoring apparatus, characterised in that, comprise: a parameter obtaining module, configured to obtain a real-time operation parameter of a to-be-tested steam turbine; a real-time absolute electric efficiency obtaining module, configured to determine a real-time absolute electric efficiency of the to-be-tested steam turbine according to the real-time operation parameter; an energy efficiency grade obtaining module, configured to determine an energy efficiency grade of the to-be-tested steam turbine according to an efficiency interval to which the real-time absolute electric efficiency belongs; a real-time operation parameter adjusting module, configured to adjust the real-time operation parameter of the steam turbine to improve the real-time absolute electric efficiency.

9. An electronic device, comprising: The electronic device comprises: at least one processor; and a memory connected with the at least one processor in communication; wherein the memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor to enable the at least one processor to execute the steam turbine state monitoring method in any one of claims 1-7.

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