CN113982709B - Method and device for calculating instantaneous heat supply steam extraction amount of steam turbine and electronic equipment - Google Patents
Method and device for calculating instantaneous heat supply steam extraction amount of steam turbine and electronic equipment Download PDFInfo
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- CN113982709B CN113982709B CN202111311959.3A CN202111311959A CN113982709B CN 113982709 B CN113982709 B CN 113982709B CN 202111311959 A CN202111311959 A CN 202111311959A CN 113982709 B CN113982709 B CN 113982709B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
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Abstract
The embodiment of the application provides a calculation method, a calculation device and electronic equipment for instantaneous heat supply steam extraction of a steam turbine, wherein the calculation method, the device and the electronic equipment are used for calculating the instantaneous heat supply steam extraction of the steam turbine according to the first flow part thermal parameters of a medium pressure cylinder of the steam turbine and the second flow part thermal parameters of a low pressure cylinder, calculating the steam extraction of the medium pressure cylinder by utilizing the first flow part thermal parameters, calculating the first steam inlet of the low pressure cylinder by utilizing the second flow part thermal parameters, and calculating the instantaneous heat supply steam extraction of the steam turbine according to the steam extraction and the first steam inlet, so that the instantaneous heat supply steam extraction of the steam turbine can be calculated under the condition that a heat supply flowmeter fails, providing references for operators to adjust the steam turbine, and improving the efficiency of adjusting the steam turbine by the operators.
Description
Technical Field
The application relates to the field of thermal engineering of thermal power plants, in particular to a calculation method and device of instantaneous heating steam extraction quantity of a steam turbine and electronic equipment.
Background
The steam turbine is an external combustion rotary machine capable of converting steam heat energy into mechanical work. After entering the steam turbine, the steam from the boiler sequentially passes through a series of annularly arranged nozzles and blades, and the heat energy of the steam is converted into mechanical energy for rotating the rotor of the steam turbine.
In some scenes, the exhaust steam of the medium-pressure cylinder of the steam turbine is collected on a heat-supply steam main pipe, the heat is supplied to the heat exchange station through the heat-supply steam main pipe, and the instantaneous heat-supply steam extraction quantity of the steam turbine can provide references for operators to adjust the steam turbine. At present, the instantaneous heat supply steam extraction amount of the steam turbine is measured by introducing a heat supply flow meter, and under the condition of failure of the heat supply flow meter, the instantaneous heat supply steam extraction amount of the steam turbine cannot be measured, and therefore an operator cannot adjust the steam turbine to provide a reference, and the blindness of adjusting the steam turbine by the operator is high and the efficiency is low.
Disclosure of Invention
The embodiment of the application aims to provide a calculation method, a device and electronic equipment for instantaneous heat supply steam extraction of a steam turbine, and solves the problem that the instantaneous heat supply steam extraction of the steam turbine cannot be measured under the condition that a heat supply flowmeter fails.
In order to solve the above technical problems, embodiments of the present application are implemented as follows:
in a first aspect, an embodiment of the present application provides a method for calculating an instantaneous heating steam extraction amount of a steam turbine, including:
acquiring a first through-flow part thermal parameter of a middle pressure cylinder and a second through-flow part thermal parameter of a low pressure cylinder of the steam turbine; calculating the exhaust steam quantity of the medium-pressure cylinder by utilizing the first ventilation part thermal parameters; calculating a first steam inlet amount of the low-pressure cylinder by utilizing the second through-flow part thermal parameters; and calculating the instantaneous heat supply steam extraction quantity of the steam turbine according to the steam discharge quantity and the first steam inlet quantity.
In a second aspect, an embodiment of the present application provides a device for calculating instantaneous heating steam extraction of a steam turbine, including:
the acquisition module is used for acquiring the first through-flow part thermal parameters of the middle pressure cylinder and the second through-flow part thermal parameters of the low pressure cylinder of the steam turbine; the first calculation module is used for calculating the exhaust steam quantity of the medium-pressure cylinder by utilizing the first through-flow part thermodynamic parameter; the second calculation module is used for calculating the first steam inlet quantity of the low-pressure cylinder by utilizing the second through-flow part thermal parameters; and the third calculation module is used for calculating the instantaneous heat supply steam extraction quantity of the steam turbine according to the steam extraction quantity and the first steam inlet quantity.
In a third aspect, embodiments of the present application provide an electronic device including a processor, a communication interface, a memory, and a communication bus; the processor, the communication interface and the memory complete communication with each other through a bus; the memory is used for storing a computer program; the processor is configured to execute the program stored in the memory, and implement the method step of calculating the instantaneous heating steam extraction of the steam turbine according to the first aspect.
In a fourth aspect, embodiments of the present application provide a computer readable storage medium, where a computer program is stored, where the computer program is executed by a processor to implement the steps of the method for calculating the instantaneous heat supply steam extraction of a steam turbine according to the first aspect.
According to the technical scheme, the first through-flow part thermal parameters of the middle pressure cylinder and the second through-flow part thermal parameters of the low pressure cylinder of the steam turbine are obtained, the first through-flow part thermal parameters are utilized to calculate the exhaust steam quantity of the middle pressure cylinder, the second through-flow part thermal parameters are utilized to calculate the first inlet steam quantity of the low pressure cylinder, the instantaneous heat supply steam extraction quantity of the steam turbine is calculated according to the exhaust steam quantity and the first inlet steam quantity, the instantaneous heat supply steam extraction quantity of the steam turbine can be calculated under the condition that the heat supply flow meter fails, references are provided for operators to adjust the steam turbine, and the efficiency of the operators to adjust the steam turbine is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic flow chart of a first method for calculating instantaneous heat supply steam extraction of a steam turbine according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a second flow chart of a method for calculating instantaneous heat supply steam extraction of a steam turbine according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a third flow chart of a method for calculating instantaneous heat supply steam extraction of a steam turbine according to an embodiment of the present application;
FIG. 4 is a schematic diagram of module components of a device for calculating instantaneous heat supply steam extraction of a steam turbine according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The embodiment of the application provides a calculation method, a calculation device and electronic equipment for instantaneous heat supply steam extraction of a steam turbine, and solves the problem that the instantaneous heat supply steam extraction of the steam turbine cannot be measured under the condition of heat supply flow meter faults.
In order to better understand the technical solutions in the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
In some scenes, the exhaust steam of the medium-pressure cylinder of the steam turbine is collected on a heat-supply steam main pipe, the heat is supplied to the heat exchange station through the heat-supply steam main pipe, and the instantaneous heat-supply steam extraction quantity of the steam turbine can provide references for operators to adjust the steam turbine. At present, the instantaneous heat supply steam extraction amount of the steam turbine is measured by introducing a heat supply flow meter, and under the condition of failure of the heat supply flow meter, the instantaneous heat supply steam extraction amount of the steam turbine cannot be measured, and therefore an operator cannot adjust the steam turbine to provide a reference, and the blindness of adjusting the steam turbine by the operator is high and the efficiency is low. Even if the instantaneous heating steam extraction amount of the steam turbine is calculated by a daily average calculation method, the calculated instantaneous heating steam extraction amount has larger deviation from the actual heating steam extraction amount and is not representative.
As shown in fig. 1, an embodiment of the present application provides a method for calculating instantaneous heating steam extraction of a steam turbine, where an execution body of the method may be a terminal device.
The calculation method of the instantaneous heat supply steam extraction amount of the steam turbine specifically comprises the following steps S100-S104:
in S100, a first bleed portion thermal parameter of a middle pressure cylinder and a second bleed portion thermal parameter of a low pressure cylinder of the steam turbine are obtained.
Specifically, the steam turbine is composed of a rotor and a stator, wherein the rotor comprises a main shaft, an impeller, moving blades, a coupler and the like, the stator comprises a steam inlet part, a cylinder, a baffle plate, a static blade grid, a steam seal, a bearing and the like, and the cylinder comprises a medium-pressure cylinder, a low-pressure cylinder, a high-pressure cylinder and the like. In some scenarios, a first bleed portion thermal parameter of the intermediate pressure cylinder and a second bleed portion thermal parameter of the low pressure cylinder may be obtained while the steam turbine is in a heat rate acceptance condition (THA condition).
The first flow section thermal parameters of the intermediate pressure cylinder of the steam turbine include, but are not limited to, instantaneous main steam flow, rated main steam flow, and rated primary steam flow at the steam extraction ports. The rated main steam flow and the rated steam flow of the upper stage of the steam extraction port can be obtained by referring to a turbine thermodynamic property book. For example, under THA conditions, the rated main steam flow may be 472.35 (t/h) and the rated primary steam flow at the steam extraction may be 376.7 (t/h).
The second through-flow part thermal parameters of the low-pressure cylinder comprise, but are not limited to, instantaneous low-pressure cylinder absolute inlet pressure, rated low-pressure cylinder inlet amount, rated low-pressure cylinder absolute inlet pressure and the like. The instantaneous low-pressure cylinder steam inlet absolute pressure is obtained by converting the low-pressure cylinder steam inlet pressure, and the low-pressure cylinder steam inlet pressure can be measured by devices such as a pressure gauge. The rated low-pressure cylinder steam inlet amount and the rated low-pressure cylinder absolute steam inlet pressure can also be referred to from a turbine thermodynamic property book. For example, under THA conditions, the rated low pressure cylinder may be 355.712 (t/h) and the rated low pressure cylinder absolute intake pressure may be 0.245 (MPa).
In S101, the exhaust amount of the medium pressure cylinder is calculated using the first through-flow portion thermal parameter.
In one possible implementation, the first through-flow portion thermal parameters include instantaneous main steam flow, rated main steam flow, and rated extraction upper stage steam flow, S101 includes:
calculating the ratio of the instantaneous main steam flow to the rated main steam flow, and calculating the product of the ratio and the primary steam quantity on the rated steam extraction port to obtain the steam discharge quantity.
Specifically, the exhaust steam amount of the medium pressure cylinder may be denoted as G, and then in g=instantaneous main steam flow/rated main steam flow is the primary steam amount at the rated steam extraction port; where "/" denotes division and "×" denotes multiplication. For example, in G = instantaneous main steam flow/rated main steam flow x rated extraction upper stage steam flow = instantaneous main steam flow/472.35 x 376.7.
It should be noted that the exhaust gas amount of the medium pressure cylinder may have other calculation manners, and the embodiments of the present application are not limited herein. For example, the amount of reheat steam can be subtracted from the amount of associated regenerative extraction steam on the intermediate pressure cylinder to yield the amount of exhaust steam from the intermediate pressure cylinder.
In S102, a first intake air quantity of the low pressure cylinder is calculated using the second through-flow portion thermal parameter.
In one possible implementation, the second through-flow portion thermal parameters include an instantaneous low pressure cylinder inlet absolute pressure, a rated low pressure cylinder inlet amount, and a rated low pressure cylinder absolute inlet pressure, S102 includes:
and calculating the product of the absolute steam inlet pressure of the instantaneous low-pressure cylinder and the steam inlet quantity of the rated low-pressure cylinder, and calculating the ratio of the product to the absolute steam inlet pressure of the rated low-pressure cylinder to obtain the first steam inlet quantity.
Specifically, the first intake air amount may be noted as gnow, and gnow=instantaneous low pressure cylinder intake air absolute pressure; where "/" denotes division and "×" denotes multiplication. For example, gnow=instantaneous low cylinder inlet absolute pressure 355.712/0.245.
It should be noted that the first intake air amount of the low pressure cylinder may have other calculation manners, and embodiments of the present application are not limited herein. For example: the thermodynamic characteristic book of the steam turbine can be utilized to carry out linear regression on the steam inlet quantity of the low-pressure cylinder and the steam inlet pressure of the low-pressure cylinder under various working conditions, so as to obtain a linear relation formula of the steam inlet quantity of the low-pressure cylinder and the steam inlet pressure of the low-pressure cylinder.
In S104, calculating the instantaneous heat supply steam extraction quantity of the steam turbine according to the steam extraction quantity and the first steam inlet quantity.
In one possible implementation, S104 includes: and calculating the difference between the exhaust steam quantity and the first steam inlet quantity to obtain the instantaneous heating steam extraction quantity.
Specifically, after the exhaust amount of the medium pressure cylinder and the first intake amount of the low pressure cylinder are calculated in the above-described manner, the instantaneous heating steam extraction amount of the steam turbine is calculated as the formula instantaneous heating steam extraction amount=g medium-G low.
According to the technical scheme provided by the embodiment of the application, the first through-flow part thermal parameters of the middle pressure cylinder and the second through-flow part thermal parameters of the low pressure cylinder of the steam turbine are obtained, the exhaust steam quantity of the middle pressure cylinder is calculated by utilizing the first through-flow part thermal parameters, the first inlet steam quantity of the low pressure cylinder is calculated by utilizing the second through-flow part thermal parameters, the instantaneous heat supply steam extraction quantity of the steam turbine is calculated according to the exhaust steam quantity and the first inlet steam quantity, the instantaneous heat supply steam extraction quantity of the steam turbine can be calculated under the condition that the heat supply flowmeter fails, references are provided for operators to adjust the steam turbine, and the efficiency of the operators to adjust the steam turbine is improved.
As shown in fig. 2, an embodiment of the present application provides a method for calculating instantaneous heating steam extraction of a steam turbine, where an execution body of the method may be a terminal device. The method for calculating the instantaneous heat supply steam extraction amount of the steam turbine specifically comprises the following steps S200 to S204:
in S200, a first bleed portion thermal parameter of a middle pressure cylinder and a second bleed portion thermal parameter of a low pressure cylinder of the steam turbine are obtained.
In S201, the exhaust amount of the medium pressure cylinder is calculated using the first through-flow portion thermal parameter.
In S202, a first intake air quantity of the low pressure cylinder is calculated using the second through-flow portion thermal parameter.
In S203, the water adding parameter, the steam adding parameter and the water flow of the heater corresponding to the medium pressure cylinder are obtained, and the second steam inlet amount of the heater corresponding to the medium pressure cylinder is calculated by using the water adding parameter, the steam adding parameter and the water flow.
Specifically, steam is upwards discharged from a boiler through a medium-pressure cylinder and is respectively led into the middle parts of two low-pressure cylinders through a medium-low pressure communicating pipe, the steam enters from the middle parts of the low-pressure cylinders and then respectively flows to two steam discharge ports to enter a lower steam discharge device, a steam extraction port is reserved at the lower part of the cylinder, and the steam is extracted into a heater to heat water.
The water adding parameters comprise, but are not limited to, the water inlet enthalpy value and the water outlet enthalpy value of the water adding side of the heater, and the water flow refers to the flow of condensed water to the deaerator.
In one possible implementation, the water addition parameters include an outlet enthalpy value and an inlet enthalpy value of the water addition side of the different heaters, the steam addition parameters include an inlet enthalpy value and a hydrophobic enthalpy value of the steam addition side of the different heaters, and S203 includes:
for a first heater in the heaters, calculating a first difference value of an inlet steam enthalpy value and a hydrophobic enthalpy value, a second difference value of an outlet water enthalpy value and an inlet water enthalpy value, and calculating a first ratio of the first difference value to the second difference value; calculating a third difference value between the vapor intake enthalpy value and the hydrophobic enthalpy value for a second heater in the heaters; calculating a second ratio of the third difference to the second difference; and calculating the product of the water flow and the fourth difference value of the first ratio and the second ratio to obtain a second steam inlet G.
Specifically, there may be a plurality of heaters in the steam turbine, and for each heater, there are corresponding an outflow enthalpy value and an inflow enthalpy value of the water adding side, and an inflow enthalpy value and a drainage enthalpy value of the steam adding side.
For example, the first heater in the heaters may be a fifth heater, the second heater may be a fourth heater, and the second steam intake G of the heater may be calculated by the following formula:
wherein h' 51 The vapor inlet enthalpy value of the vapor adding side of the No. five heater is h' 52 A hydrophobic enthalpy value h of the steam adding side of the heater No. five 51 Enthalpy value of water inlet of water adding side of heater No. five, h 52 The water outlet enthalpy value of the water adding side of the heater No. five is h' 41 Vapor inlet enthalpy value h 'of vapor adding side of No. four heater' 42 A hydrophobic enthalpy value h of the steam adding side of the fourth heater 41 Enthalpy value of water inlet of water adding side of heater number four, h 42 The water outlet enthalpy value of the water adding side of the fourth heater, wherein the units of the enthalpy values can be KJ/kg, G Coagulation Is the flow t/h of the condensed water to the deaerator.
The enthalpy values can be obtained by referring to a turbine characteristic book, the flow of the condensed water to the deaerator can be measured by a flowmeter, and then the second steam inlet quantity of the heater is calculated according to the formula.
In S204, the instantaneous heating steam extraction quantity of the steam turbine is calculated according to the steam extraction quantity, the first steam inlet quantity and the second steam inlet quantity.
In one possible implementation, S204 includes: and calculating the sum value of the first steam inlet quantity and the second steam inlet quantity, and calculating a fifth difference value of the steam discharge quantity and the sum value to obtain the instantaneous heat supply steam extraction quantity of the steam turbine.
Specifically, the instantaneous heating steam extraction amount of the steam turbine is the difference value of the exhaust steam amount, the first steam inlet amount and the second steam inlet amount, and the instantaneous heating steam extraction amount of the steam turbine can be calculated by adopting the following formula:
instantaneous heating extraction = medium G- (glow+g plus) =medium G-low-G plus.
It should be noted that S200 to S202 have the same or similar implementation manner as that of S100 to S102 in the above embodiments, which may be referred to each other, and the embodiments of the present application are not repeated here.
According to the technical scheme provided by the embodiment of the application, the instantaneous heat supply steam extraction quantity of the steam turbine is calculated by further using the second steam inlet quantity of the heater, so that the error between the calculated instantaneous heat supply steam extraction quantity and the actual instantaneous heat supply steam extraction quantity of the steam turbine can be further reduced, the accuracy of the instantaneous heat supply steam extraction quantity is improved, a more reliable reference is provided for operators to adjust the steam turbine, and the efficiency of the operators to adjust the steam turbine is further improved.
In one possible implementation, after S204, the method further includes correcting the instantaneous heating extraction.
Specifically, after the instantaneous heat supply steam extraction quantity is calculated, the accuracy of the instantaneous heat supply steam extraction quantity is debugged and verified, and particularly, if the heat supply steam extraction quantity of a turbine set is not zero or has large deviation under the pure condensation working condition, the fact that the calculated instantaneous heat supply steam extraction quantity has large deviation from the actual instantaneous heat supply steam extraction quantity is indicated, and correction is needed.
When the calculated instantaneous heat supply steam extraction quantity is determined, the calculated instantaneous heat supply steam extraction quantity can be compared with the heat supply steam extraction quantity measured by a heat supply flow meter under the single heat supply working condition of the unit, and an error is determined; the daily average heat supply steam extraction quantity can be used for comparing with the heat supply steam extraction quantity reversely balanced by the unit to determine the error. In the correction, the absolute pressure of the inlet gas of the low-pressure cylinder can be corrected, namely, the pressure generated by the height difference at the position of the measuring instrument is corrected by taking the absolute pressure into consideration. Therefore, the calculated instantaneous heat supply steam extraction quantity is corrected, and the accuracy of the calculated instantaneous heat supply steam extraction quantity can be improved.
As shown in fig. 3, an embodiment of the present application provides a method for calculating instantaneous heating steam extraction of a steam turbine, where an execution body of the method may be a terminal device. The method for calculating the instantaneous heat supply steam extraction amount of the steam turbine specifically comprises the following steps S300 to S305:
in S300, a first bleed portion thermal parameter of a middle pressure cylinder and a second bleed portion thermal parameter of a low pressure cylinder of the steam turbine are obtained.
In S301, the exhaust amount of the medium pressure cylinder is calculated using the first through-flow portion thermal parameter.
In S302, a first intake air quantity of the low pressure cylinder is calculated using the second through-flow portion thermal parameter.
In S304, calculating the instantaneous heat supply steam extraction quantity of the steam turbine according to the steam extraction quantity and the first steam inlet quantity.
In S305, the instantaneous heating steam extraction is corrected.
Specifically, after the instantaneous heat supply steam extraction quantity is calculated, the accuracy of the instantaneous heat supply steam extraction quantity is debugged and verified, and particularly, if the heat supply steam extraction quantity of a turbine set is not zero or has large deviation under the pure condensation working condition, the fact that the calculated instantaneous heat supply steam extraction quantity has large deviation from the actual instantaneous heat supply steam extraction quantity is indicated, and correction is needed.
When the calculated instantaneous heat supply steam extraction quantity is determined, the calculated instantaneous heat supply steam extraction quantity can be compared with the heat supply steam extraction quantity measured by a heat supply flow meter under the single heat supply working condition of the unit, and an error is determined; the daily average heat supply steam extraction quantity can be used for comparing with the heat supply steam extraction quantity reversely balanced by the unit to determine the error. In the correction, the absolute pressure of the inlet gas of the low-pressure cylinder can be corrected, namely, the pressure generated by the height difference at the position of the measuring instrument is corrected by taking the absolute pressure into consideration.
It should be noted that S300 to S304 have the same or similar implementation manner as that of S100 to S104 in the above embodiments, which may be referred to each other, and the embodiments of the present application are not repeated here.
By means of the technical scheme disclosed by the embodiment of the application, the calculated instantaneous heating steam extraction quantity is corrected, and the accuracy of the calculated instantaneous heating steam extraction quantity can be improved.
According to the method for calculating the instantaneous heat supply steam extraction amount of the turbine provided in the foregoing embodiment, based on the same technical concept, the embodiment of the present application further provides a calculating device for calculating the instantaneous heat supply steam extraction amount of the turbine, and fig. 4 is a schematic block diagram of the calculating device for calculating the instantaneous heat supply steam extraction amount of the turbine provided in the embodiment of the present application, where the calculating device for calculating the instantaneous heat supply steam extraction amount of the turbine is used to execute the method for calculating the instantaneous heat supply steam extraction amount of the turbine described in fig. 1 to 3, as shown in fig. 4, the calculating device 400 for calculating the instantaneous heat supply steam extraction amount of the turbine includes:
an acquisition module 401, configured to acquire a first flow portion thermal parameter of a middle pressure cylinder and a second flow portion thermal parameter of a low pressure cylinder of the steam turbine; a first calculation module 402, configured to calculate an exhaust gas amount of the medium pressure cylinder using the first through-flow portion thermal parameter; a second calculation module 403, configured to calculate a first intake air quantity of the low pressure cylinder using the second through-flow portion thermal parameter; the third calculation module 404 is configured to calculate an instantaneous heating steam extraction of the steam turbine according to the exhaust steam quantity and the first steam inlet quantity.
According to the technical scheme provided by the embodiment of the application, the first through-flow part thermal parameters of the middle pressure cylinder and the second through-flow part thermal parameters of the low pressure cylinder of the steam turbine are obtained, the exhaust steam quantity of the middle pressure cylinder is calculated by utilizing the first through-flow part thermal parameters, the first inlet steam quantity of the low pressure cylinder is calculated by utilizing the second through-flow part thermal parameters, the instantaneous heat supply steam extraction quantity of the steam turbine is calculated according to the exhaust steam quantity and the first inlet steam quantity, the instantaneous heat supply steam extraction quantity of the steam turbine can be calculated under the condition that the heat supply flowmeter fails, references are provided for operators to adjust the steam turbine, and the efficiency of the operators to adjust the steam turbine is improved.
The calculating device for the instantaneous heat supply steam extraction amount of the steam turbine provided by the embodiment of the application can realize each process in the embodiment corresponding to the calculating method for the instantaneous heat supply steam extraction amount of the steam turbine, and in order to avoid repetition, the description is omitted here.
It should be noted that, the calculating device of the steam turbine instantaneous heat supply steam extraction amount provided in the embodiment of the present application and the calculating method of the steam turbine instantaneous heat supply steam extraction amount provided in the embodiment of the present application are based on the same application conception, so that the implementation of the embodiment can refer to the implementation of the foregoing calculating method of the steam turbine instantaneous heat supply steam extraction amount, and the repetition is omitted.
The embodiment of the present application further provides an electronic device, based on the same technical concept, for executing the method for calculating the instantaneous heat supply and steam extraction of the steam turbine according to the embodiment of the present application, and fig. 5 is a schematic structural diagram of an electronic device for implementing each embodiment of the present application, as shown in fig. 5. The electronic device may vary considerably in configuration or performance and may include one or more processors 501 and memory 502, where the memory 502 may store one or more stored applications or data. Wherein the memory 502 may be transient storage or persistent storage. The application programs stored in memory 502 may include one or more modules (not shown), each of which may include a series of computer-executable instructions for use in an electronic device.
Still further, the processor 501 may be configured to communicate with the memory 502 and execute a series of computer executable instructions in the memory 502 on an electronic device. The electronic device may also include one or more power supplies 503, one or more wired or wireless network interfaces 504, one or more input/output interfaces 505, and one or more keyboards 506.
In this embodiment, the electronic device includes a processor, a communication interface, a memory, and a communication bus; the processor, the communication interface and the memory complete communication with each other through a bus; a memory for storing a computer program; the processor is used for executing the program stored in the memory and realizing the following method steps:
acquiring a first through-flow part thermal parameter of a middle pressure cylinder and a second through-flow part thermal parameter of a low pressure cylinder of the steam turbine; calculating the exhaust steam quantity of the medium pressure cylinder by utilizing the thermodynamic parameters of the first ventilation part; calculating a first steam inlet quantity of the low-pressure cylinder by using the thermodynamic parameters of the second through-flow part; and calculating the instantaneous heat supply steam extraction quantity of the steam turbine according to the steam discharge quantity and the first steam inlet quantity.
According to the technical scheme provided by the embodiment of the application, under the condition that the heat supply flowmeter fails, the instantaneous heat supply steam extraction quantity of the steam turbine can be calculated, a reference is provided for an operator to adjust the steam turbine, and the efficiency of the operator to adjust the steam turbine is improved.
The present embodiment also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of:
acquiring a first through-flow part thermal parameter of a middle pressure cylinder and a second through-flow part thermal parameter of a low pressure cylinder of the steam turbine; calculating the exhaust steam quantity of the medium pressure cylinder by utilizing the thermodynamic parameters of the first ventilation part; calculating a first steam inlet quantity of the low-pressure cylinder by using the thermodynamic parameters of the second through-flow part; and calculating the instantaneous heat supply steam extraction quantity of the steam turbine according to the steam discharge quantity and the first steam inlet quantity.
According to the technical scheme provided by the embodiment of the application, under the condition that the heat supply flowmeter fails, the instantaneous heat supply steam extraction quantity of the steam turbine can be calculated, a reference is provided for an operator to adjust the steam turbine, and the efficiency of the operator to adjust the steam turbine is improved.
It will be apparent to those skilled in the art that embodiments of the present application may be provided as a method, apparatus, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, the electronic device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash memory (flashRAM). Memory is an example of computer-readable media.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transshipment) such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.
It will be apparent to those skilled in the art that embodiments of the present application may be provided as a method, apparatus, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.
Claims (8)
1. A method for calculating instantaneous heating steam extraction of a steam turbine, the method comprising:
acquiring a first through-flow part thermal parameter of a middle pressure cylinder and a second through-flow part thermal parameter of a low pressure cylinder of the steam turbine;
calculating the exhaust steam quantity of the medium-pressure cylinder by utilizing the first ventilation part thermal parameters;
calculating a first steam inlet amount of the low-pressure cylinder by utilizing the second through-flow part thermal parameters;
acquiring water adding parameters, steam adding parameters and water flow of a heater corresponding to the medium-pressure cylinder;
calculating a second steam inlet quantity of the heater corresponding to the medium pressure cylinder by using the water adding parameter, the steam adding parameter and the water flow;
calculating instantaneous heat supply steam extraction quantity of the steam turbine according to the steam extraction quantity, the first steam inlet quantity and the second steam inlet quantity;
the water adding parameters comprise water outlet enthalpy values and water inlet enthalpy values of water adding sides of different heaters, the steam adding parameters comprise steam inlet enthalpy values and water drainage enthalpy values of steam adding sides of different heaters, and the second steam inlet quantity of the corresponding heater of the medium pressure cylinder calculated by the water adding parameters, the steam adding parameters and the water flow comprises:
calculating a first difference value between the steam inlet enthalpy value and the hydrophobic enthalpy value, a second difference value between the water outlet enthalpy value and the water inlet enthalpy value, and a first ratio of the first difference value to the second difference value for a first heater in the heaters;
calculating a third difference between the vapor intake enthalpy and the hydrophobic enthalpy for a second one of the heaters;
calculating a second ratio of the third difference to the second difference;
and calculating the product of the water flow and a fourth difference value of the first ratio and the second ratio to obtain the second steam inlet quantity.
2. The method of claim 1, wherein the first flow portion thermal parameter comprises an instantaneous main steam flow, a rated main steam flow, and a rated extraction upper stage steam flow, and wherein calculating the medium pressure cylinder exhaust using the first flow portion thermal parameter comprises:
calculating the ratio of the instantaneous main steam flow to the rated main steam flow;
and calculating the product of the ratio and the primary steam quantity on the rated steam extraction port to obtain the steam discharge quantity.
3. The method of claim 1, wherein the second flow-through portion thermal parameters include an instantaneous low pressure cylinder inlet absolute pressure, a nominal low pressure cylinder inlet and a nominal low pressure cylinder absolute inlet pressure, and wherein calculating the first inlet of the low pressure cylinder using the second flow-through portion thermal parameters comprises:
calculating the product of the absolute pressure of the instantaneous low-pressure cylinder steam inlet and the rated low-pressure cylinder steam inlet;
and calculating the ratio of the product to the absolute steam inlet pressure of the rated low-pressure cylinder to obtain the first steam inlet quantity.
4. A method according to any one of claims 1-3, wherein said calculating the instantaneous heating extraction of said turbine from said exhaust and said first intake comprises:
and calculating the difference between the exhaust steam quantity and the first steam inlet quantity to obtain the instantaneous heat supply steam extraction quantity.
5. The method of claim 1, wherein said calculating a transient heating extraction of said turbine from said exhaust, said first intake, and said second intake comprises:
calculating the sum value of the first steam inlet quantity and the second steam inlet quantity;
and calculating a fifth difference value between the exhaust steam quantity and the sum value to obtain the instantaneous heat supply steam extraction quantity of the steam turbine.
6. The method of claim 1, wherein after said calculating the instantaneous heating extraction of said turbine from said exhaust steam amount, said first intake steam amount, and said second intake steam amount, said method further comprises:
and correcting the instantaneous heat supply steam extraction quantity.
7. A computing device for instantaneous heat supply steam extraction of a steam turbine, the device comprising:
the acquisition module is used for acquiring the first through-flow part thermal parameters of the middle pressure cylinder and the second through-flow part thermal parameters of the low pressure cylinder of the steam turbine;
the first calculation module is used for calculating the exhaust steam quantity of the medium-pressure cylinder by utilizing the first through-flow part thermodynamic parameter;
the second calculation module is used for calculating the first steam inlet quantity of the low-pressure cylinder by utilizing the second through-flow part thermal parameters;
the acquisition module is also used for acquiring water adding parameters, steam adding parameters and water flow of the heater corresponding to the medium-pressure cylinder;
the fourth calculation module is used for calculating the second steam inlet quantity of the heater corresponding to the medium pressure cylinder by using the water adding parameter, the steam adding parameter and the water flow;
the third calculation module is used for calculating the instantaneous heat supply steam extraction quantity of the steam turbine according to the steam extraction quantity, the first steam inlet quantity and the second steam inlet quantity;
the water adding parameters comprise water outlet enthalpy values and water inlet enthalpy values of water adding sides of different heaters, the steam adding parameters comprise steam inlet enthalpy values and water drainage enthalpy values of steam adding sides of different heaters,
the fourth calculation module is specifically configured to calculate, for a first heater of the heaters, a first difference value between the steam inlet enthalpy value and the hydrophobic enthalpy value, and a second difference value between the water outlet enthalpy value and the water inlet enthalpy value, and calculate a first ratio of the first difference value to the second difference value;
calculating a third difference between the vapor intake enthalpy and the hydrophobic enthalpy for a second one of the heaters;
calculating a second ratio of the third difference to the second difference;
and calculating the product of the water flow and a fourth difference value of the first ratio and the second ratio to obtain the second steam inlet quantity.
8. An electronic device comprising a processor, a communication interface, a memory, and a communication bus; the processor, the communication interface and the memory complete communication with each other through a bus; the memory is used for storing a computer program; the processor is configured to execute a program stored in the memory, and implement the method steps for calculating the instantaneous heating steam extraction of the steam turbine according to any one of claims 1 to 6.
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| CN108691585A (en) * | 2018-05-09 | 2018-10-23 | 国网山东省电力公司电力科学研究院 | A kind of computational methods of condensing turbine low pressure (LP) cylinder efficiency |
| CN111706411A (en) * | 2020-07-22 | 2020-09-25 | 西安西热节能技术有限公司 | Thermodynamic system for transforming back pressure unit into extraction condensing unit and working method |
| CN112127958A (en) * | 2020-08-28 | 2020-12-25 | 中核核电运行管理有限公司 | Device and method for determining steam extraction parameters of nuclear turbine |
| KR20210034868A (en) * | 2019-09-23 | 2021-03-31 | 한국전력공사 | Method for calculating main steam flow in turbin performance test and turbin performance test device using the same |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108691585A (en) * | 2018-05-09 | 2018-10-23 | 国网山东省电力公司电力科学研究院 | A kind of computational methods of condensing turbine low pressure (LP) cylinder efficiency |
| KR20210034868A (en) * | 2019-09-23 | 2021-03-31 | 한국전력공사 | Method for calculating main steam flow in turbin performance test and turbin performance test device using the same |
| CN111706411A (en) * | 2020-07-22 | 2020-09-25 | 西安西热节能技术有限公司 | Thermodynamic system for transforming back pressure unit into extraction condensing unit and working method |
| CN112127958A (en) * | 2020-08-28 | 2020-12-25 | 中核核电运行管理有限公司 | Device and method for determining steam extraction parameters of nuclear turbine |
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