Steam turbine state monitoring method and device and electronic equipment

Abstract

The invention discloses a steam turbine state monitoring method and device and electronic equipment. The steam turbine state monitoring method comprises the steps that real-time operation parameters of a steam turbine to be detected are obtained; determining the real-time absolute electric efficiency of the to-be-tested steam turbine according to the real-time operation parameters; according to the efficiency interval to which the real-time absolute electric efficiency belongs, determining the energy efficiency level of the to-be-tested steam turbine; wherein different efficiency intervals correspond to different energy efficiency levels; real-time operating parameters of the steam turbine are adjusted to improve real-time absolute electrical efficiency. According to the steam turbine state monitoring method, the real-time energy efficiency grade and the real-time absolute electric efficiency of the steam turbine are obtained according to the real-time operation parameters of the steam turbine, the timeliness of obtaining the performance data of the steam turbine is guaranteed, and an operator can know the current energy efficiency condition of the steam turbine in time. And the energy utilization efficiency of the steam turbine is improved through real-time regulation and control of the running parameters of the steam turbine.

Description

Technical Field

[0001] The present invention relates to the technical field of steam turbine operation control, and in particular to a method, device and electronic equipment for monitoring the status of a steam turbine. Background Art

[0002] A steam turbine is a rotary steam-powered device that is widely used in modern energy production processes, involving the electricity, metallurgy, petroleum, chemical and shipbuilding industries.

[0003] When the steam turbine is running, it is necessary to monitor the operating status of the steam turbine to avoid turbine failure. In the existing technology for steam turbine status monitoring, it is carried out in combination with the steam turbine generator set as a whole, such as monitoring the operating status, vibration, expansion, oil level, etc. in the steam turbine system. At the same time, it is also mainly carried out from the perspective of fault monitoring, and a post-evaluation is adopted after the fault occurs. Such data acquisition has the disadvantage of lag, and the acquired data and operating status do not correspond in real time. The existing technology for steam turbine performance evaluation and steam turbine control methods can only play a limited guiding role in production. Summary of the invention

[0004] The present invention provides a method, device and electronic equipment for monitoring the state of a steam turbine, so as to solve the problem that the current method for monitoring the state of a steam turbine has low real-time performance in evaluating and regulating the performance of the steam turbine.

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

[0006] Obtain the real-time operating parameters of the steam turbine to be tested;

[0007] Determining the real-time absolute electrical efficiency of the steam turbine to be tested according to the real-time operating parameters;

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

[0009] The real-time operating parameters of the steam turbine are adjusted to improve the real-time absolute electrical efficiency.

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

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

[0012] Determining the real-time absolute electrical efficiency of the steam turbine to be tested according to the real-time operating parameters comprises:

[0013] The real-time absolute electrical efficiency of the steam turbine to be tested is determined according to the real-time operating parameter set.

[0014] Optionally, adjusting the real-time operating parameters of the steam turbine to improve the real-time absolute electrical efficiency includes:

[0015] Obtaining adjustable parameters of the steam turbine according to the real-time operating parameters; the adjustable parameters include: at least one of main steam inlet flow rate, inlet steam temperature, inlet steam pressure, exhaust steam temperature and exhaust steam pressure;

[0016] The adjustable parameters of the steam turbine are adjusted to improve the real-time absolute electrical efficiency.

[0017] Optionally, the real-time operating parameters include power parameters and intake and exhaust parameters of the steam turbine;

[0018] The step of obtaining the real-time steam turbine absolute electrical efficiency of the steam turbine to be tested according to the real-time operating parameters comprises:

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

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

[0021] Obtaining the relative internal efficiency of the steam turbine according to the power parameter and the steam inlet and exhaust parameters;

[0022] The real-time steam turbine absolute electrical efficiency is obtained according to the product of the generator efficiency, the mechanical efficiency and the relative internal efficiency.

[0023] Optionally, the power parameters include: the actual output electric power of the steam turbine to be tested and the actual shaft power of the steam turbine to be tested;

[0024] The step of obtaining the generator efficiency of the steam turbine according to the power parameter comprises:

[0025] The generator efficiency of the steam turbine is obtained according to the ratio of the actual output electric power of the steam turbine to be tested to the actual shaft power of the steam turbine to be tested.

[0026] Optionally, the power parameters include: the actual shaft power of the steam turbine to be tested and the theoretical mechanical output power of the steam turbine to be tested;

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

[0028] The mechanical efficiency of the steam turbine is obtained according to the ratio of the actual shaft power of the steam turbine to be tested to the theoretical mechanical output power of the steam turbine to be tested.

[0029] Optionally, the power parameter includes: the power inside the steam turbine to be measured;

[0030] The steam inlet and exhaust parameters include: the input heat of the i-th steam of the steam turbine to be tested and the output heat of the i-th steam of the steam turbine to be tested; wherein the i-th steam includes: main steam and reheat steam;

[0031] The obtaining the relative internal efficiency of the steam turbine according to the power parameter and the intake and exhaust parameters comprises:

[0032] The heat consumed by the steam turbine during operation is obtained according to the difference between the heat input and the heat output of the i-th steam of the steam turbine;

[0033] The relative internal efficiency of the steam turbine is obtained according to the ratio of the internal power of the steam turbine to the heat consumed during the working process.

[0034] Optionally, after obtaining the real-time operating parameters of the steam turbine to be tested, the step further includes:

[0035] Acquire the rated design parameters of the steam turbine to be tested; wherein the rated design parameters of the steam turbine to be tested include: the average load of the unit of the steam turbine to be tested, the rated parameters of the main steam, the rated design vacuum degree of the condenser and the rated design power generation heat rate of the steam turbine generator set;

[0036] Determining the theoretical optimal absolute electrical efficiency of the steam turbine to be tested according to the rated design parameters;

[0037] The step of adjusting the real-time operating parameters of the steam turbine to improve the real-time absolute electrical efficiency comprises:

[0038] The real-time operating parameters of the steam turbine are adjusted 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, there is provided a steam turbine state monitoring device, comprising:

[0040] A parameter acquisition module is used to obtain the real-time operating parameters of the steam turbine to be tested;

[0041] A real-time absolute electrical efficiency acquisition module, used to determine the real-time absolute electrical efficiency of the steam turbine to be tested according to the real-time operating parameters;

[0042] An energy efficiency grade acquisition module, used for determining the energy efficiency grade of the steam turbine to be tested according to the efficiency interval to which the real-time absolute electrical efficiency belongs;

[0043] The real-time operation parameter adjustment module is used to adjust the real-time operation 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 executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the turbine condition monitoring method described in any embodiment of the present invention.

[0048] The steam turbine state monitoring method, device and electronic device of the embodiment of the present invention, wherein in the steam turbine state monitoring method, the real-time operating parameters of the steam turbine to be tested are obtained in the monitoring method to obtain the real-time absolute electrical efficiency of the steam turbine to be tested. Then, the energy efficiency level of the steam turbine to be tested is determined according to the interval in which the real-time absolute electrical efficiency is located. And the real-time operating parameters of the steam turbine are adjusted to improve the real-time absolute electrical efficiency of the steam turbine. In the embodiment of the present invention, the real-time absolute electrical efficiency of the steam turbine is obtained according to the real-time operating parameters of the steam turbine, which improves the timeliness of the steam turbine performance evaluation; while ensuring the timeliness of the data, the energy efficiency level obtained provides an intuitive quantitative result for the energy efficiency evaluation of the steam turbine; when adjusting the real-time operating parameters of the steam turbine, the real-time absolute electrical efficiency of the steam turbine is continuously optimized through continuous parameter acquisition and adjustment, which promotes the real-time and continuous improvement of the steam turbine energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0050] Figure 1 A flow chart of a method for monitoring a steam turbine state provided by an embodiment of the present invention;

[0051] Figure 2 A flow chart of another method for monitoring the status of a steam turbine provided by an embodiment of the present invention;

[0052] Figure 3 A flow chart of another method for monitoring the status of a steam turbine provided by an embodiment of the present invention;

[0053] Figure 4 A flow chart of another method for monitoring the status of a steam turbine provided by an embodiment of the present invention;

[0054] Figure 5A flow chart of another method for monitoring the status of a steam turbine provided by an embodiment of the present invention;

[0055] Figure 6 A flow chart of another method for monitoring the status of a steam turbine provided by an embodiment of the present invention;

[0056] Figure 7 A schematic structural diagram of a steam turbine state monitoring device provided by an embodiment of the present invention;

[0057] Figure 8 The present invention is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0058] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work 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 and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0060] Figure 1 The flow chart of a method for monitoring the status of a steam turbine provided by an embodiment of the present invention is applicable to the case of real-time monitoring of the status of a steam turbine. The method can be executed by a steam turbine status monitoring device, which can be implemented in the form of hardware and / or software. Figure 1 As shown, the method includes:

[0061] S101. Obtain real-time operating parameters of the steam turbine to be tested.

[0062] Collect the real-time operating parameters of the steam turbine to monitor the status of the steam turbine.

[0063] Exemplarily, the real-time operating parameters of the steam turbine include: main steam inlet parameters, exhaust parameters, reheat steam parameters and generator outlet terminal electrical power of the steam turbine.

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

[0065] Exhaust parameters refer to the parameters of steam discharged from the low-pressure cylinder of the steam turbine. Collect the temperature of the steam discharged from the low-pressure cylinder of the steam turbine. The exhaust temperature will affect the thermal efficiency of the steam turbine and the performance of the condenser. Collect the pressure of the steam discharged from the low-pressure cylinder of the steam turbine. The lower the exhaust pressure, the more complete the expansion process of the steam turbine and the higher the efficiency.

[0066] Reheat steam parameters refer to the parameters of steam entering the medium pressure cylinder after it has done work in the high pressure cylinder and is heated by the reheater. Reheat steam parameters include reheat steam temperature and reheat steam pressure.

[0067] The electrical power at the generator output terminal refers to the electrical output generated by the steam turbine driving the generator.

[0068] S102. Determine the real-time absolute electrical efficiency of the steam turbine to be tested according to 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 the steam turbine refers to the efficiency of the steam turbine in converting fuel thermal energy into electrical energy.

[0070] Exemplarily, a mathematical model for calculating the real-time absolute electrical efficiency of a steam turbine is established based on the characteristics of the real-time absolute electrical efficiency of a steam turbine. The establishment of the mathematical model of the real-time absolute electrical efficiency of a steam turbine is based on the working principle of the steam turbine, the principle of energy balance and standard specifications: a steam turbine energy efficiency model is established based on the operation and production process of a steam turbine generator set, the acceptance test procedures for the thermal performance of a steam turbine and the calculation method for technical and economic indicators of a thermal power plant. Such a steam turbine energy efficiency model is a real-time absolute electrical efficiency mathematical model, which has the function of accurately calculating the electrical efficiency of a steam turbine generator set. The 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 to be tested.

[0071] S103: Determine the energy efficiency level of the steam turbine to be tested according to the efficiency range to which the real-time absolute electrical efficiency belongs.

[0072] Among them, different efficiency ranges correspond to different energy efficiency levels.

[0073] Specifically, different types of steam turbines or different steam turbine application platforms have different criteria for determining steam turbine energy efficiency, and the specific interval classification of energy efficiency levels is based on steam turbine performance characteristics, industry standards, or internal energy efficiency management policies of enterprises. Optionally, through the classification of energy efficiency levels, operators can more easily identify inefficient steam turbines and prioritize their optimization or upgrade.

[0074] Exemplarily, according to the steam turbine energy efficiency grade classification, when 23% < power generation efficiency ≤ 28%, it is determined as level 4 energy efficiency; 28% < power generation efficiency ≤ 33%, it is determined as level 3 energy efficiency; 33% < power generation efficiency ≤ 40%, it is determined as level 2 energy efficiency; 40% < power generation efficiency, it is determined as level 1 energy efficiency. When the real-time absolute electrical efficiency of the steam turbine to be tested is at level 4 energy efficiency, the operation effect of the steam turbine is not ideal. The low efficiency of the steam turbine operation means that more fuel is consumed, which may produce more emissions and have a greater impact on the environment. The manager needs to check the operating status of the steam turbine at this time for troubleshooting or optimization. When the real-time absolute electrical efficiency of the steam turbine to be tested is at level 1 energy efficiency, extremely high energy efficiency means extremely low fuel consumption and emissions. The manager can judge that the operating condition of the steam turbine to be tested is better 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 the steam turbine reflects the real-time working state of the steam turbine. When the equipment is not faulty, the real-time operating parameters of the steam turbine are adjusted to improve the combustion efficiency, reduce heat loss, and optimize the steam flow path to improve the real-time absolute electrical efficiency, thereby improving the operating efficiency of the steam turbine.

[0077] Exemplarily, adjusting the real-time operating parameters of the steam turbine includes: adjusting the steam pressure of the steam turbine. By adjusting the steam inlet pressure and exhaust pressure of the steam turbine, the power generation can be increased. Adjusting the steam temperature of the steam turbine, that is, adjusting the steam inlet temperature and steam exhaust temperature of the steam turbine. Adjusting the blade speed of the steam turbine. Under the premise of ensuring the stable operation of the unit, appropriately adjusting the blade speed can increase the output power, thereby improving the power generation efficiency.

[0078] Optionally, the state monitoring of the steam turbine can also be performed based on the historical parameters of the absolute electrical efficiency. After the real-time absolute electrical efficiency is calculated, the operating state of the steam turbine is diagnosed and the real-time operating parameters of the steam turbine are adjusted according to the historical changes in the absolute electrical efficiency, so as to timely discover the degradation of the energy efficiency state and improve the energy efficiency of the steam turbine. When the changes in the historical absolute electrical efficiency parameters of the steam turbine to be tested are combined, it is judged that the real-time absolute electrical efficiency has dropped suddenly, then the steam turbine to be tested may have a sudden failure. Relevant inspections, troubleshooting and real-time operating parameters are adjusted for the steam turbine to be tested to improve the real-time absolute electrical efficiency. When the changes in the historical absolute electrical efficiency parameters of the steam turbine to be tested are combined, it is judged that the real-time absolute electrical efficiency has decreased, then it can be judged that the steam turbine to be tested has some kind of progressive failure or performance degradation. This decrease does not occur suddenly, but gradually appears over time. The reasons for this situation include: the blades, bearings and other components age and wear with the increase of running time, so that the absolute electrical efficiency of the steam turbine decreases over time. On the basis of adjusting the real-time operating parameters of the steam turbine to improve the real-time absolute electrical efficiency, necessary maintenance and replacement work is carried out at the same time. In the steam turbine state monitoring method provided in this embodiment, the operating state of the steam turbine is judged based on the historical data of the real-time absolute electrical efficiency, and the reasons for the state degradation and the optimization strategy are timely proposed to reduce downtime and maintenance costs.

[0079] The embodiment of the present invention provides a method for monitoring the state of a steam turbine, in which the real-time operating parameters of the steam turbine to be tested are obtained to obtain the real-time absolute electrical efficiency of the steam turbine to be tested. Then, the energy efficiency level of the steam turbine to be tested is determined according to the interval in which the real-time absolute electrical efficiency is located. And the real-time operating parameters of the steam turbine are adjusted to improve the real-time absolute electrical efficiency of the steam turbine. In the embodiment of the present invention, the real-time absolute electrical efficiency of the steam turbine is obtained according to the real-time operating parameters of the steam turbine, which improves the timeliness of the performance evaluation of the steam turbine; at the same time, while ensuring the timeliness of the data, the energy efficiency level obtained provides an intuitive quantitative result for the energy efficiency evaluation of the steam turbine; when adjusting the real-time operating parameters of the steam turbine, the real-time absolute electrical efficiency of the steam turbine is continuously optimized through real-time parameter acquisition and adjustment, which promotes the real-time and continuous improvement of the energy efficiency of the steam turbine.

[0080] Based on the above embodiments, Figure 2 A flow chart of another method for monitoring the status of a steam turbine provided by an embodiment of the present invention is as follows: Figure 2 As shown, the method includes:

[0081] S201. Obtain real-time operating parameters of the steam turbine to be tested.

[0082] S202: Perform preprocessing operations on real-time operation parameters to obtain a real-time operation parameter set.

[0083] The preprocessing operation includes at least one of judging, screening, supplementing, converting and marking.

[0084] Specifically, the acquired real-time operating parameters are subjected to data quality inspection and data standardization management, and the integrity, standardization and accuracy of the real-time operating parameters are pre-processed, including judging, screening, supplementing, converting and marking the acquired steam turbine production operation data, and organizing the data that meets the management requirements into a real-time operating parameter set.

[0085] Among them, the judgment operation includes: checking the validity of the data. Optionally, excluding obvious errors or abnormal values ​​of real-time operating parameters. The screening operation includes: selecting parameters that are important for energy efficiency evaluation. The supplementation operation includes: if some key data are missing, they may be supplemented by model prediction or historical data interpolation. The conversion operation includes: converting the real-time operating parameters into a form suitable for analysis, optionally converting the temperature from Celsius to Fahrenheit, or unifying the unit dimensions. The labeling operation includes: adding labels or classifications to the real-time operating parameters to facilitate subsequent processing and analysis.

[0086] Exemplarily, the real-time operating parameters are normalized, and the real-time operating parameters are converted into a unified dimension or range to generate a high-quality real-time operating parameter set. The real-time operating parameter set can accurately reflect the operating state of the steam turbine to be tested. When the real-time operating parameters are normalized, a corresponding normalization method is selected according to the characteristics of the data. Optionally, when the outlet steam temperature of the steam turbine varies greatly, a linear transformation is used to limit the range of the operating state parameters to reduce noise.

[0087] S203. Determine the real-time absolute electrical efficiency of the steam turbine to be tested according to the real-time operating parameter set.

[0088] The real-time operating parameter set is a real-time operating parameter that has undergone preprocessing operations. The real-time operating parameter set can accurately reflect the operating status of the steam turbine to be tested. Determining the real-time absolute electrical efficiency of the steam turbine to be tested based on the real-time operating parameter set is conducive to improving the accuracy of the obtained real-time absolute electrical efficiency.

[0089] S204: Determine the energy efficiency level of the steam turbine to be tested according to 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 flow chart of another method for monitoring the status of a steam turbine provided by an embodiment of the present invention is as follows: Figure 3 As shown, the method includes:

[0092] S301. Obtain real-time operating parameters of the steam turbine to be tested.

[0093] S302. Determine the real-time absolute electrical efficiency of the steam turbine to be tested according to the real-time operating parameters.

[0094] S303: Determine the energy efficiency level of the steam turbine to be tested according to the efficiency range to which the real-time absolute electrical efficiency belongs.

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

[0096] The adjustable parameters include: at least one of main steam inlet flow rate, inlet steam temperature, inlet steam pressure, exhaust steam temperature and exhaust steam pressure;

[0097] Specifically, the real-time operating parameters are screened to obtain the adjustable parameters of the steam turbine. Among them, the adjustable parameters refer to parameters that can be directly optimized for the absolute electrical efficiency of the steam turbine by adjustment. In the regulation of the main steam inlet flow rate, controlling the amount of steam entering the steam turbine can affect the power output and efficiency of the steam turbine. In the regulation of the inlet steam temperature, the higher the inlet temperature, the higher the thermal efficiency of the steam turbine. In the regulation of the inlet steam pressure, an increase in the inlet steam pressure can increase the density and flow of the steam, thereby increasing the power output. In the regulation of the exhaust steam temperature and the exhaust steam pressure, the exhaust steam temperature and the exhaust steam pressure affect the steam pressure at the exhaust port of the steam turbine. Reducing the back pressure can improve the efficiency of the steam turbine 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, the main steam inlet flow rate is increased in the adjustable threshold interval of the main steam inlet flow rate to improve the real-time absolute electrical efficiency of the steam turbine; when the adjustment of the main steam recent flow rate exceeds the adjustable threshold interval, the excessive steam inlet flow rate may cause the steam turbine to overheat or overload. In the adjustable threshold interval of the inlet temperature, the inlet temperature is increased to improve the real-time absolute electrical efficiency of the steam turbine. In the adjustable threshold interval of the inlet pressure, the inlet pressure is increased to improve the real-time absolute electrical efficiency of the steam turbine. In the adjustable threshold interval of the exhaust steam temperature and the adjustable threshold interval of the exhaust steam pressure, the exhaust steam temperature and the exhaust steam pressure are reduced to improve the real-time absolute electrical efficiency of the steam turbine.

[0100] Optionally, the main steam inlet flow rate adjustable threshold interval, the inlet steam temperature adjustable threshold interval, the inlet steam pressure adjustable threshold interval, the exhaust steam temperature adjustable threshold interval and the exhaust steam pressure adjustable threshold interval are determined based on the performance parameters of the steam turbine to be tested and the threshold of real-time absolute electrical efficiency.

[0101] Based on the above embodiments, Figure 4A flow chart of another method for monitoring the status of a steam turbine provided by an embodiment of the present invention is as follows: Figure 4 As shown, the real-time operating parameters include the power parameters and intake and exhaust parameters of the steam turbine, and the steam turbine status monitoring method includes:

[0102] S401. Obtain real-time operating parameters of the steam turbine to be tested.

[0103] S402. Obtain the generator efficiency of the steam turbine according to the power parameter.

[0104] The generator efficiency of a steam turbine refers to the efficiency of the generator of the steam turbine in converting mechanical energy into electrical energy. The generator efficiency of a steam turbine is affected by the design, operating status and maintenance status of the generator. The generator efficiency can be calculated by the ratio of the actual output electrical power to the actual shaft power of the steam turbine to be tested.

[0105] S403. Obtain the mechanical efficiency of the steam turbine according to the power parameter.

[0106] The mechanical efficiency of a steam turbine refers to the efficiency of a steam turbine 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 loss, and leakage loss. The mechanical efficiency can be calculated by the ratio of the actual shaft power of the steam turbine to be tested to the theoretical mechanical output power of the steam turbine to be tested.

[0107] S404. Obtain the relative internal efficiency of the steam turbine according to the power parameters and the steam inlet and exhaust parameters.

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

[0109] S405. Obtain the real-time absolute electrical efficiency of the steam turbine according to the product of the generator efficiency, the mechanical efficiency and the 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. The absolute electrical efficiency of a steam turbine reflects the energy loss during the entire conversion process from fuel to electrical energy. The real-time absolute electrical efficiency of a steam turbine is calculated by multiplying the generator efficiency, mechanical efficiency, and relative internal efficiency.

[0111] S406. Determine the energy efficiency level of the steam turbine to be tested according to 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 flow chart of another method for monitoring the status of a steam turbine provided by an embodiment of the present invention is as follows: Figure 5 As shown, the method includes:

[0114] S501. Obtain real-time operating parameters of the steam turbine to be tested.

[0115] S502. Obtain the generator efficiency of the steam turbine according to the ratio of the actual output electric power of the steam turbine to be tested to the actual shaft power of the steam turbine to be tested.

[0116] The power parameters include: the actual output electrical power of the steam turbine to be tested and the actual shaft power of the steam turbine to be tested.

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

[0118]

[0119] Among them, η G Indicates the generator efficiency of the steam turbine, %; P G Indicates the actual output power of the steam turbine, kW; P M Indicates the actual shaft power of the turbine, kW.

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

[0121] S503. Obtain the mechanical efficiency of the steam turbine according to the ratio of the actual shaft power of the steam turbine to be tested to the theoretical mechanical output power of the steam turbine to be tested.

[0122] The power parameters include: the actual shaft power of the steam turbine to be tested and the theoretical mechanical output power of the steam turbine to be tested.

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

[0124]

[0125] Among them, η M Indicates mechanical efficiency, %; P M Indicates the actual shaft power of the steam turbine, kW; P M,A Indicates the theoretical mechanical output power of the turbine, kW.

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

[0127] S504, the heat consumed by the steam turbine during operation is obtained according to the difference between the heat input and the heat output of the i-th steam of the steam turbine. The relative internal efficiency of the steam turbine is obtained according to the ratio of the internal power of the steam turbine to the heat consumed during operation.

[0128] The power parameters include: the power inside the steam turbine to be measured;

[0129] The steam inlet and exhaust parameters include: the input heat of the i-th steam of the steam turbine to be tested and the output heat of the i-th steam of the steam turbine to be tested; wherein the i-th steam includes: main steam and reheat steam. wherein the i-th steam includes: main steam and reheat steam.

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

[0131]

[0132] Among them, P Q Indicates the power in the steam turbine, kW; m i,in Indicates the steam inlet volume of the i-th turbine, kg / h; H i,in represents the inlet enthalpy of the i-th steam of the steam turbine, kJ / kg; m i,out Indicates the steam (or condensate) outlet volume of the i-th type of steam turbine, kg / h; H i,out It represents the outlet enthalpy of the i-th steam (or condensate) of the steam turbine, in kJ / kg.

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

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

[0135] η E =η Q ×η M ×η G

[0136] Among them, η E Indicates the absolute electrical efficiency of the steam turbine, expressed in %, η Q Indicates the relative internal efficiency of the steam turbine, %; η M Indicates mechanical efficiency, %; η G Indicates generator efficiency, %.

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

[0138] S506. Determine the energy efficiency level of the steam turbine to be tested according to 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 flow chart of another method for monitoring the status of a steam turbine provided by an embodiment of the present invention is as follows: Figure 6 As shown, the method includes:

[0141] S601. Obtain real-time operating parameters of the steam turbine to be tested.

[0142] S602: Obtain rated design parameters of the steam turbine to be tested.

[0143] The rated design parameters of the steam turbine to be tested include: the average load of the unit of the steam turbine to be tested, the rated parameters of the main steam, the rated design vacuum degree of the condenser and the rated design power generation heat rate of the steam turbine generator unit;

[0144] Specifically, when obtaining the rated design parameters of the steam turbine to be tested, the average unit load of the steam turbine to be tested is the expected long-term average operating load when the steam turbine is designed; the main steam rated parameters are the steam conditions required for the normal operation of the steam turbine, including: rated main steam pressure and temperature parameters. The rated design vacuum of the condenser affects the thermal efficiency and power output of the steam turbine, including: the expected vacuum of the condenser when it is designed; the rated design power generation heat rate of the steam turbine generator set is the efficiency index of the steam turbine converting fuel thermal energy into electrical energy under rated conditions.

[0145] S603. Determine the theoretical optimal absolute electrical efficiency of the steam turbine to be tested according to the rated design parameters.

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

[0147] S604. Determine the real-time absolute electrical efficiency of the steam turbine to be tested according to the real-time operating parameters.

[0148] S605. Determine the energy efficiency level of the steam turbine to be tested according to 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 performance of the steam turbine in actual operation is evaluated by comparing the real-time absolute electrical efficiency with the theoretical optimal absolute electrical efficiency, and the difference between the real-time absolute electrical efficiency and the theoretical optimal absolute electrical efficiency is reduced by adjusting the real-time operating parameters of the steam turbine. If the actual operating efficiency is lower than the theoretical optimal efficiency, this may indicate that the steam turbine is faulty or has degraded performance. Adjust the operating parameters of the steam turbine, such as increasing or decreasing the steam flow, adjusting the steam pressure and temperature, optimizing the condenser vacuum, etc., to reduce the difference between the real-time absolute electrical efficiency and the theoretical optimal absolute electrical efficiency, thereby improving the energy efficiency of the steam turbine.

[0151] For example, if the theoretical optimal absolute electrical efficiency of the steam turbine is 35%, when the main steam inlet flow rate is 67.26 kg / h, the absolute electrical efficiency of the steam turbine is 26.12%. Then, the main steam inlet flow rate is adjusted to 68.15 kg / h, and after the adjustment, the absolute electrical efficiency of the steam turbine is 29.21%.

[0152] Based on the above embodiments, Figure 7 The following is a schematic diagram of the structure of a steam turbine state monitoring device provided by 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 steam turbine to be tested; a real-time absolute electrical efficiency acquisition module 02, used to determine the real-time absolute electrical efficiency of the steam turbine to be tested according to the real-time operating parameters; an energy efficiency grade acquisition module 03, used to determine the energy efficiency grade of the steam turbine to be tested according to the efficiency range to which the real-time absolute electrical efficiency belongs; a real-time operating parameter adjustment module 04, used to adjust the real-time operating parameters of the steam turbine to improve the real-time absolute electrical efficiency.

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

[0154] Figure 8 The schematic diagram of the structure of an electronic device provided by an embodiment of the present invention is used to implement the steam turbine condition monitoring method of each 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 processing, cellular phones, smart phones, 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 examples and are not intended to limit the implementation of the present invention described and / or required herein.

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

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

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

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

[0159] Various implementations 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 chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations may include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0160] Computer programs for implementing 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, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

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

[0162] To provide interaction with a user, the systems and techniques described herein may 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 a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0163] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0164] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0165] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0166] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for monitoring the status of a steam turbine, characterized in that: include: Obtain the real-time operating parameters of the steam turbine to be tested; Determining the real-time absolute electrical efficiency of the steam turbine to be tested according to the real-time operating parameters; Determine the energy efficiency grade of the steam turbine to be tested according to the efficiency interval to which the real-time absolute electrical efficiency belongs; wherein different efficiency intervals correspond to different energy efficiency grades; The real-time operating parameters of the steam turbine are adjusted to improve the real-time absolute electrical efficiency.

2. The method for monitoring the status of a steam turbine according to claim 1, characterized in that: After obtaining the real-time operating parameters of the steam turbine to be tested, the method further includes: Performing a preprocessing operation on the real-time operation parameters to obtain a real-time operation parameter set; the preprocessing operation includes: at least one of judging, screening, supplementing, converting and marking; Determining the real-time absolute electrical efficiency of the steam turbine to be tested according to the real-time operating parameters comprises: The real-time absolute electrical efficiency of the steam turbine to be tested is determined according to the real-time operating parameter set.

3. The method for monitoring the status of a steam turbine according to claim 1, characterized in that: The step of adjusting the real-time operating parameters of the steam turbine to improve the real-time absolute electrical efficiency comprises: Obtaining adjustable parameters of the steam turbine according to the real-time operating parameters; the adjustable parameters include: at least one of main steam inlet flow rate, inlet steam temperature, inlet steam pressure, exhaust steam temperature and exhaust steam pressure; The adjustable parameters of the steam turbine are adjusted to improve the real-time absolute electrical efficiency.

4. The method for monitoring the status of a steam turbine according to claim 1, characterized in that: The real-time operating parameters include power parameters and intake and exhaust parameters of the steam turbine; The step of obtaining the real-time steam turbine absolute electrical efficiency of the steam turbine to be tested according to the real-time operating parameters comprises: Acquiring the generator efficiency of the steam turbine according to the power parameter; Acquiring the mechanical efficiency of the steam turbine according to the power parameter; Obtaining the relative internal efficiency of the steam turbine according to the power parameter and the steam inlet and exhaust parameters; The real-time steam turbine absolute electrical efficiency is obtained according to the product of the generator efficiency, the mechanical efficiency and the relative internal efficiency.

5. The method for monitoring the status of a steam turbine according to claim 4, characterized in that: The power parameters include: the actual output power of the steam turbine to be tested and the actual shaft power of the steam turbine to be tested; The step of obtaining the generator efficiency of the steam turbine according to the power parameter comprises: The generator efficiency of the steam turbine is obtained according to the ratio of the actual output electric power of the steam turbine to be tested to the actual shaft power of the steam turbine to be tested.

6. The method for monitoring the status of a steam turbine according to claim 4, characterized in that: The power parameters include: the actual shaft power of the steam turbine to be tested and the theoretical mechanical output power of the steam turbine to be tested; The obtaining the mechanical efficiency of the steam turbine according to the power parameter comprises: The mechanical efficiency of the steam turbine is obtained according to the ratio of the actual shaft power of the steam turbine to be tested to the theoretical mechanical output power of the steam turbine to be tested.

7. The method for monitoring the status of a steam turbine according to claim 4, characterized in that: The power parameters include: the internal power of the steam turbine to be measured; The steam inlet and exhaust parameters include: the input heat of the i-th steam of the steam turbine to be tested and the output heat of the i-th steam of the steam turbine to be tested; wherein the i-th steam includes: main steam and reheat steam; The obtaining the relative internal efficiency of the steam turbine according to the power parameter and the intake and exhaust parameters comprises: The heat consumed by the steam turbine during operation is obtained according to the difference between the heat input and the heat output of the i-th steam of the steam turbine; The relative internal efficiency of the steam turbine is obtained according to the ratio of the internal power of the steam turbine to the heat consumed during the working process.

8. The method for monitoring the status of a steam turbine according to claim 1, characterized in that: After obtaining the real-time operating parameters of the steam turbine to be tested, the method further includes: Acquire the rated design parameters of the steam turbine to be tested; wherein the rated design parameters of the steam turbine to be tested include: the average load of the unit of the steam turbine to be tested, the rated parameters of the main steam, the rated design vacuum degree of the condenser and the rated design power generation heat rate of the steam turbine generator set; Determining the theoretical optimal absolute electrical efficiency of the steam turbine to be tested according to the rated design parameters; The step of adjusting the real-time operating parameters of the steam turbine to improve the real-time absolute electrical efficiency comprises: The real-time operating parameters of the steam turbine are adjusted to reduce the difference between the real-time absolute electrical efficiency and the theoretical optimal absolute electrical efficiency.

9. A steam turbine condition monitoring device, characterized in that: include: A parameter acquisition module is used to obtain the real-time operating parameters of the steam turbine to be tested; A real-time absolute electrical efficiency acquisition module, used to determine the real-time absolute electrical efficiency of the steam turbine to be tested according to the real-time operating parameters; An energy efficiency grade acquisition module, used for determining the energy efficiency grade of the steam turbine to be tested according to the efficiency interval to which the real-time absolute electrical efficiency belongs; The real-time operation parameter adjustment module is used to adjust the real-time operation parameters of the steam turbine to improve the real-time absolute electrical efficiency.

10. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the steam turbine condition monitoring method according to any one of claims 1 to 8.

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