Method and system for determining variations in energy consumption indexes of unit on basis of cylinder efficiency changes in steam turbine

Abstract

Provided in the present invention are a method and system for determining variations in energy consumption indexes of a unit on the basis of cylinder efficiency changes in a steam turbine. The method comprises: acquiring operation parameters of a steam turbine, a cylinder efficiency variation in a high-pressure cylinder of the steam turbine, a cylinder efficiency variation in an intermediate-pressure cylinder thereof and a cylinder efficiency variation in a low-pressure cylinder thereof at the current moment; and on the basis of the operation parameters of the steam turbine, the cylinder efficiency variation in the high-pressure cylinder, the cylinder efficiency variation in the intermediate-pressure cylinder and the cylinder efficiency variation in the low-pressure cylinder, respectively determining a variation in each energy consumption index of a unit with respect to each cylinder efficiency variation, wherein the energy consumption indexes comprise a heat consumption rate, a power generation coal consumption rate and a power supply coal consumption rate. By means of the technical solution provided in the present invention, the effects of cylinder efficiency changes in a steam turbine on a heat consumption rate, a power generation coal consumption rate and a power supply coal consumption rate of a unit are quickly and accurately determined, thereby improving the production management level.

Description

Method and system for determining unit energy consumption index variables based on changes in steam turbine cylinder efficiency Technical Field

[0001] The present invention relates to the field of steam turbine operation evaluation, and in particular to a method and system for determining unit energy consumption index variables based on changes in steam turbine cylinder efficiency. Background Art

[0002] Steam turbine cylinder efficiency is the most important criterion for evaluating steam turbine performance, directly reflecting turbine performance and determining the economic viability of the generator set. During actual operation, turbine flow performance can change due to factors such as aging, surface scaling, and mechanical wear, leading to a decrease in efficiency, increased heat rate, and decreased economic efficiency. Therefore, timely data on cylinder efficiency changes is essential to assess their impact on key economic indicators and identify potential problems promptly. Therefore, it is crucial to implement simple and accurate calculations, avoiding complex and extensive computations, so that field personnel can quickly determine the impact of cylinder efficiency on economic indicators such as heat rate.

[0003] Existing methods for calculating the impact of turbine cylinder efficiency on unit heat rate, power generation coal consumption rate, and power supply coal consumption rate primarily rely on complex thermal calculations. These involve numerous parameters and variables, require specialized knowledge and computational tools, and are characterized by long calculation cycles and low accuracy, making it difficult to promptly reflect changes in unit performance. For field operators, limited technical expertise and equipment make these complex calculations difficult, hindering their ability to accurately assess unit performance.

[0004] Summary of the Invention

[0005] The present invention provides a method and system for determining unit energy consumption index variables based on changes in turbine cylinder efficiency, so as to at least solve the technical problem of long calculation cycle and low calculation accuracy when calculating the influence of turbine cylinder efficiency on unit heat consumption rate, power generation coal consumption rate, power supply coal consumption rate, etc.

[0006] A first embodiment of the present invention provides a method for determining unit energy consumption index variables based on changes in turbine cylinder efficiency, the method comprising:

[0007] Obtaining the current operating parameters of the steam turbine, the change in the high-pressure cylinder efficiency, the change in the medium-pressure cylinder efficiency, and the change in the low-pressure cylinder efficiency of the steam turbine;

[0008] Determine the change in each cylinder efficiency change to each energy consumption index of the unit based on the operating parameters of the steam turbine, the change in high-pressure cylinder efficiency, the change in medium-pressure cylinder efficiency, and the change in low-pressure cylinder efficiency;

[0009] Among them, the energy consumption indicators include: heat consumption rate, power generation coal consumption rate, and power supply coal consumption rate.

[0010] Preferably, the operating parameters include:

[0011] Steam turbine heat rate, proportion of high-pressure cylinder work in the overall work of the unit, proportion of medium-pressure cylinder work in the overall work of the unit, proportion of low-pressure cylinder work in the overall work of the unit, initial cylinder efficiency of high-pressure cylinder, initial cylinder efficiency of medium-pressure cylinder, initial cylinder efficiency of low-pressure cylinder, boiler efficiency, pipeline efficiency and plant power consumption rate.

[0012] Furthermore, the determination of the change in each cylinder efficiency change to each energy consumption index of the unit based on the operating parameters of the steam turbine, the change in high-pressure cylinder efficiency, the change in medium-pressure cylinder efficiency, and the change in low-pressure cylinder efficiency includes:

[0013] According to the heat rate of the steam turbine, the proportion of the high-pressure cylinder work in the overall work of the unit, the proportion of the medium-pressure cylinder work in the overall work of the unit, the proportion of the low-pressure cylinder work in the overall work of the unit, the change in the high-pressure cylinder efficiency, the change in the medium-pressure cylinder efficiency, the change in the low-pressure cylinder efficiency, the high-pressure cylinder initial efficiency, the medium-pressure cylinder initial efficiency, and the low-pressure cylinder initial efficiency, respectively determine the change in the heat rate of the unit caused by the change in the high-pressure cylinder efficiency, the change in the heat rate of the unit caused by the change in the medium-pressure cylinder efficiency, and the change in the heat rate of the unit caused by the change in the low-pressure cylinder efficiency;

[0014] Determine, according to the boiler efficiency and pipeline efficiency corresponding to the steam turbine, the change in the unit heat rate caused by the change in the high-pressure cylinder efficiency, the change in the unit heat rate caused by the change in the medium-pressure cylinder efficiency, and the change in the unit heat rate caused by the change in the low-pressure cylinder efficiency, the change in the unit power generation coal consumption rate caused by the change in the high-pressure cylinder efficiency, the change in the unit power generation coal consumption rate caused by the change in the medium-pressure cylinder efficiency, and the change in the unit power generation coal consumption rate caused by the change in the low-pressure cylinder efficiency;

[0015] According to the plant power consumption rate corresponding to the steam turbine, the change in the unit's power generation coal consumption rate caused by the change in the high-pressure cylinder efficiency, the change in the unit's power generation coal consumption rate caused by the change in the medium-pressure cylinder efficiency, and the change in the unit's power generation coal consumption rate caused by the change in the low-pressure cylinder efficiency, the change in the unit's power supply coal consumption rate caused by the change in the high-pressure cylinder efficiency, the change in the unit's power supply coal consumption rate caused by the change in the medium-pressure cylinder efficiency, and the change in the unit's power supply coal consumption rate caused by the change in the low-pressure cylinder efficiency are respectively determined.

[0016] Furthermore, the calculation formula for the change in the unit heat rate caused by the change in the high-pressure cylinder efficiency is as follows:

[0017] The calculation formula for the change in the unit heat rate caused by the change in the intermediate pressure cylinder efficiency is as follows:

[0018] The calculation formula for the change in the unit heat rate caused by the change in the low-pressure cylinder efficiency is as follows:

[0019] Wherein, Δq1 is the change in the unit heat rate caused by the change in the high-pressure cylinder efficiency, q is the turbine heat rate, α1% is the proportion of the high-pressure cylinder work in the overall work of the unit, Δβ1% is the change in the high-pressure cylinder efficiency, β1% is the initial high-pressure cylinder efficiency, Δq2 is the change in the unit heat rate caused by the change in the intermediate-pressure cylinder efficiency, α2% is the proportion of the intermediate-pressure cylinder work in the overall work of the unit, Δβ2% is the change in the intermediate-pressure cylinder efficiency, β2% is the initial intermediate-pressure cylinder efficiency, Δq3 is the change in the unit heat rate caused by the change in the low-pressure cylinder efficiency, α3% is the proportion of the low-pressure cylinder work in the overall work of the unit, Δβ3% is the change in the low-pressure cylinder efficiency, and β3% is the initial low-pressure cylinder efficiency.

[0020] Furthermore, the calculation formula for the change in the unit's power generation coal consumption rate caused by the change in the high-pressure cylinder efficiency is as follows:

[0021] The calculation formula for the change in the unit's power generation coal consumption rate caused by the change in the intermediate pressure cylinder efficiency is as follows:

[0022] The calculation formula for the change in the unit's power generation coal consumption rate caused by the change in the low-pressure cylinder efficiency is as follows:

[0023] Where Δbf1 is the change in the unit's coal consumption rate due to the change in the high-pressure cylinder efficiency, ηp% is the pipeline efficiency, ηg% is the boiler efficiency, Δbf2 is the change in the unit's coal consumption rate due to the change in the medium-pressure cylinder efficiency, and Δbf3 is the change in the unit's coal consumption rate due to the change in the low-pressure cylinder efficiency.

[0024] Furthermore, the calculation formula for the change in the unit power supply coal consumption rate caused by the change in the high-pressure cylinder efficiency is as follows:

[0025] The calculation formula for the change in the unit power supply coal consumption rate caused by the change in the intermediate pressure cylinder efficiency is as follows:

[0026] The calculation formula for the change in the unit power supply coal consumption rate caused by the change in the low-pressure cylinder efficiency is as follows:

[0027] Where Δbg1 is the change in the unit's power supply coal consumption rate caused by the change in the high-pressure cylinder efficiency, τ% is the plant power consumption rate, Δbg2 is the change in the unit's power supply coal consumption rate caused by the change in the medium-pressure cylinder efficiency, and Δbg3 is the change in the unit's power supply coal consumption rate caused by the change in the low-pressure cylinder efficiency.

[0028] A second embodiment of the present invention provides a system for determining unit energy consumption index variables based on changes in turbine cylinder efficiency, comprising:

[0029] an acquisition module, configured to acquire the current operating parameters of the steam turbine, the change in the high-pressure cylinder efficiency, the change in the medium-pressure cylinder efficiency, and the change in the low-pressure cylinder efficiency of the steam turbine;

[0030] a determination module for determining, based on the operating parameters of the steam turbine, the change in the high-pressure cylinder efficiency, the change in the medium-pressure cylinder efficiency, and the change in the low-pressure cylinder efficiency, the change in each cylinder efficiency to each energy consumption index of the unit;

[0031] Among them, the energy consumption indicators include: heat consumption rate, power generation coal consumption rate, and power supply coal consumption rate.

[0032] Preferably, the operating parameters include:

[0033] Steam turbine heat rate, proportion of high-pressure cylinder work in the overall work of the unit, proportion of medium-pressure cylinder work in the overall work of the unit, proportion of low-pressure cylinder work in the overall work of the unit, initial cylinder efficiency of high-pressure cylinder, initial cylinder efficiency of medium-pressure cylinder, initial cylinder efficiency of low-pressure cylinder, boiler efficiency, pipeline efficiency and plant power consumption rate.

[0034] The third aspect of the present invention provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method described in the first aspect of the present invention is implemented.

[0035] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described in the first aspect of the invention.

[0036] The technical solutions provided by the embodiments of the present invention bring at least the following beneficial effects:

[0037] The present invention proposes a method and system for determining unit energy consumption index variables based on changes in turbine cylinder efficiency. The method includes: obtaining the current turbine operating parameters, the change in high-pressure cylinder efficiency, the change in medium-pressure cylinder efficiency, and the change in low-pressure cylinder efficiency of the turbine; and determining the change in each cylinder efficiency change to each unit energy consumption index based on the turbine operating parameters, the change in high-pressure cylinder efficiency, the change in medium-pressure cylinder efficiency, and the change in low-pressure cylinder efficiency; wherein the energy consumption indexes include: heat rate, power generation coal consumption rate, and power supply coal consumption rate. The technical solution proposed by the present invention quickly and accurately determines the impact of turbine cylinder efficiency changes on the unit's heat rate, power generation coal consumption rate, and power supply coal consumption rate, thereby improving production management.

[0038] Additional aspects and advantages of the present invention will be set forth in part in the following description and, in part, will be obvious from the following description, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0040] FIG1 is a flow chart of a method for determining unit energy consumption index variables based on changes in steam turbine cylinder efficiency according to one embodiment of the present invention;

[0041] FIG2 is a structural diagram of a system for determining unit energy consumption index variables based on changes in steam turbine cylinder efficiency according to one embodiment of the present invention;

[0042] FIG3 is a structural diagram of a determination module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0044] The present invention proposes a method and system for determining unit energy consumption index variables based on changes in turbine cylinder efficiency. The method includes: obtaining the current operating parameters of the turbine, the change in high-pressure cylinder efficiency, medium-pressure cylinder efficiency, and low-pressure cylinder efficiency of the turbine; and determining the change in each cylinder efficiency change to each energy consumption index of the unit based on the operating parameters of the turbine, the change in high-pressure cylinder efficiency, the change in medium-pressure cylinder efficiency, and the change in low-pressure cylinder efficiency; wherein the energy consumption indicators include: heat rate, power generation coal consumption rate, and power supply coal consumption rate. The technical solution proposed by the present invention can quickly and accurately determine the impact of changes in turbine cylinder efficiency on the unit's heat rate, power generation coal consumption rate, and power supply coal consumption rate, thereby improving production management level.

[0045] The following describes a method and system for determining unit energy consumption index variables based on changes in turbine cylinder efficiency according to an embodiment of the present invention with reference to the accompanying drawings.

[0046] Example 1

[0047] FIG1 is a flow chart of a method for determining unit energy consumption index variables based on changes in turbine cylinder efficiency according to an embodiment of the present invention. As shown in FIG1 , the method includes:

[0048] Step 1: Obtain the current operating parameters of the steam turbine, the change in the high-pressure cylinder efficiency, the change in the medium-pressure cylinder efficiency, and the change in the low-pressure cylinder efficiency of the steam turbine;

[0049] It should be noted that the operating parameters include:

[0050] Steam turbine heat rate, proportion of high-pressure cylinder work in the overall work of the unit, proportion of medium-pressure cylinder work in the overall work of the unit, proportion of low-pressure cylinder work in the overall work of the unit, initial cylinder efficiency of high-pressure cylinder, initial cylinder efficiency of medium-pressure cylinder, initial cylinder efficiency of low-pressure cylinder, boiler efficiency, pipeline efficiency and plant power consumption rate.

[0051] Step 2: Determine the effect of each cylinder efficiency change on each energy consumption index of the unit based on the operating parameters of the steam turbine, the high-pressure cylinder efficiency change, the medium-pressure cylinder efficiency change, and the low-pressure cylinder efficiency change;

[0052] Among them, the energy consumption indicators include: Among them, the energy consumption indicators include: heat consumption rate, power generation coal consumption rate, and power supply coal consumption rate.

[0053] In the embodiment of the present disclosure, step 2 specifically includes:

[0054] Step 2-1: determining, based on the heat rate of the steam turbine, the proportion of the high-pressure cylinder work in the overall work of the unit, the proportion of the intermediate-pressure cylinder work in the overall work of the unit, the proportion of the low-pressure cylinder work in the overall work of the unit, the change in high-pressure cylinder efficiency, the change in intermediate-pressure cylinder efficiency, the change in low-pressure cylinder efficiency, the initial high-pressure cylinder efficiency, the initial intermediate-pressure cylinder efficiency, and the initial low-pressure cylinder efficiency, respectively, the change in the heat rate of the unit caused by the change in the high-pressure cylinder efficiency, the change in the heat rate of the unit caused by the change in the intermediate-pressure cylinder efficiency, and the change in the heat rate of the unit caused by the change in the low-pressure cylinder efficiency;

[0055] Furthermore, the calculation formula for the change in the unit heat rate caused by the change in the high-pressure cylinder efficiency is as follows:

[0056] The calculation formula for the change in the unit heat rate caused by the change in the intermediate pressure cylinder efficiency is as follows:

[0057] The calculation formula for the change in the unit heat rate caused by the change in the low-pressure cylinder efficiency is as follows:

[0058] In the formula, Δq1 is the change in the unit heat rate caused by the change in the high-pressure cylinder efficiency, q is the turbine heat rate, α1% is the proportion of high-pressure cylinder work in the overall work of the unit, Δβ1% is the change in high-pressure cylinder efficiency, β1% is the initial high-pressure cylinder efficiency, Δq2 is the change in the unit heat rate caused by the change in the intermediate-pressure cylinder efficiency, α2% is the proportion of intermediate-pressure cylinder work in the overall work of the unit, Δβ2% is the change in intermediate-pressure cylinder efficiency, β2% is the initial intermediate-pressure cylinder efficiency, Δq3 is the change in the unit heat rate caused by the change in low-pressure cylinder efficiency, α3% is the proportion of low-pressure cylinder work in the overall work of the unit, Δβ3% is the change in low-pressure cylinder efficiency, and β3% is the initial low-pressure cylinder efficiency.

[0059] Step 2-2: determining, based on the boiler efficiency and pipeline efficiency corresponding to the steam turbine, the change in the unit heat rate caused by the change in the high-pressure cylinder efficiency, the change in the unit heat rate caused by the change in the intermediate-pressure cylinder efficiency, and the change in the unit heat rate caused by the change in the low-pressure cylinder efficiency, respectively, the change in the unit power generation coal consumption rate caused by the change in the high-pressure cylinder efficiency, the change in the unit power generation coal consumption rate caused by the change in the intermediate-pressure cylinder efficiency, and the change in the unit power generation coal consumption rate caused by the change in the low-pressure cylinder efficiency;

[0060] Furthermore, the calculation formula for the change in the unit's power generation coal consumption rate caused by the change in the high-pressure cylinder efficiency is as follows:

[0061] The calculation formula for the change in the unit's power generation coal consumption rate caused by the change in the intermediate pressure cylinder efficiency is as follows:

[0062] The calculation formula for the change in the unit's power generation coal consumption rate caused by the change in the low-pressure cylinder efficiency is as follows:

[0063] Where Δbf1 is the change in the unit's coal consumption rate due to the change in the high-pressure cylinder efficiency, ηp% is the pipeline efficiency, ηg% is the boiler efficiency, Δbf2 is the change in the unit's coal consumption rate due to the change in the medium-pressure cylinder efficiency, and Δbf3 is the change in the unit's coal consumption rate due to the change in the low-pressure cylinder efficiency.

[0064] Step 2-3: According to the plant power consumption rate corresponding to the steam turbine, the change in the unit's power generation coal consumption rate caused by the change in the high-pressure cylinder efficiency, the change in the unit's power generation coal consumption rate caused by the change in the medium-pressure cylinder efficiency, and the change in the unit's power generation coal consumption rate caused by the change in the low-pressure cylinder efficiency, respectively determine the change in the unit's power supply coal consumption rate caused by the change in the high-pressure cylinder efficiency, the change in the unit's power supply coal consumption rate caused by the change in the medium-pressure cylinder efficiency, and the change in the unit's power supply coal consumption rate caused by the change in the low-pressure cylinder efficiency.

[0065] Furthermore, the calculation formula for the change in the unit power supply coal consumption rate caused by the change in the high-pressure cylinder efficiency is as follows:

[0066] The calculation formula for the change in the unit power supply coal consumption rate caused by the change in the intermediate pressure cylinder efficiency is as follows:

[0067] The calculation formula for the change in the unit power supply coal consumption rate caused by the change in the low-pressure cylinder efficiency is as follows:

[0068] Where Δbg1 is the change in the unit's power supply coal consumption rate caused by the change in the high-pressure cylinder efficiency, τ% is the plant power consumption rate, Δbg2 is the change in the unit's power supply coal consumption rate caused by the change in the medium-pressure cylinder efficiency, and Δbg3 is the change in the unit's power supply coal consumption rate caused by the change in the low-pressure cylinder efficiency.

[0069] It should be noted that the calculation formula for the unit heat rate is as follows:

[0070] When the turbine cycle efficiency β% changes by Δβ%, the calculation principle of the change in the turbine heat rate q, Δq, is as follows:

[0071] Ride on both sides

[0072] Substituting (1) into the above formula,

[0073] Since Δβ% generally changes very little, β% + Δβ% ≈ β%, so:

[0074] When the cylinder efficiency of a certain cylinder of the steam turbine changes, it will cause the unit cycle efficiency β to change Δβ. Taking the change of the high-pressure cylinder efficiency β1 as an example, the impact Δβ on the unit cycle efficiency β% is calculated as follows:

[0075] Unit cycle efficiency: N=(N1+N2+N3)*γ%*ηe% (8)

[0076] Where N is the generating power of the unit, N1 is the output shaft work of the high-pressure cylinder, N2 is the output shaft work of the medium-pressure cylinder, N3 is the output shaft work of the low-pressure cylinder, γ% is the mechanical efficiency, which is generally 98%, and ηe% is the generator efficiency, which is generally 98%-99%;

[0077] Substituting the above formula into (7), N1=Q1*β1, N2=Q2*β2, N3=Q3*β3 (10) N1*γ%*η e % = α1% * N, N2 * γ% * η e % = α2% * N, N3 * γ% * η e % = α3% * N (11)

[0078] Where, Q is the heat input of the unit, Q1 is the ideal enthalpy drop heat of the high-pressure cylinder, β1% is the initial cylinder efficiency of the high-pressure cylinder, Q2 is the ideal enthalpy drop heat of the intermediate-pressure cylinder, β2% is the initial cylinder efficiency of the intermediate-pressure cylinder, Q3 is the ideal enthalpy drop heat of the low-pressure cylinder, and β3% is the initial cylinder efficiency of the low-pressure cylinder;

[0079] When the high-pressure cylinder efficiency β1% changes Δβ%, the work done by the high-pressure cylinder changes ΔN1, ΔN1=Q1*Δβ1% (12)

[0080] Change in unit power generation ΔN: ΔN=ΔN1*γ%*ηe%=Q1*Δβ1%*γ%*ηe% (13)

[0081] The change Δβ% of the unit cycle efficiency β% is as follows:

[0082] Substituting the above formula into (14),

[0083] Substituting (7) into the above formula,

[0084] Substituting the above formula into (6),

[0085] In formula (18), except for the change in high-pressure cylinder efficiency Δβ1, other parameters are the values ​​before the cylinder efficiency changes, and are all known. The impact of the change in high-pressure cylinder efficiency on the unit heat rate can be calculated, and the same is true for the medium-pressure cylinder and low-pressure cylinder.

[0086] Therefore, as long as the change in the efficiency of a certain cylinder of the turbine is obtained (Δβ1, Δβ2, Δβ2,), its impact on the heat consumption rate q of the unit Δq1, Δq2, Δq3 can be obtained.

[0087] The impact on power generation coal consumption Δbf is:

[0088] The impact on power supply coal consumption Δbg is:

[0089] In summary, the present embodiment proposes a method for determining unit energy consumption index variables based on changes in turbine cylinder efficiency. This method determines the magnitude of the impact of changes in turbine cylinder efficiency on major economic indicators such as the unit's heat rate, power generation coal consumption rate, and power supply coal consumption rate. Complex thermal calculations are not required, and the impact results can be obtained through basic parameters. This facilitates guidance of production operations, allowing production personnel to quickly understand the impact of operating modes on the unit's economic efficiency, identify problems in a timely manner, and improve production management levels.

[0090] Example 2

[0091] FIG2 is a structural diagram of a system for determining unit energy consumption index variables based on changes in turbine cylinder efficiency according to one embodiment of the present invention. As shown in FIG2 , the system includes:

[0092] An acquisition module 100 is used to acquire the current operating parameters of the steam turbine, the change in the high-pressure cylinder efficiency, the change in the medium-pressure cylinder efficiency, and the change in the low-pressure cylinder efficiency of the steam turbine;

[0093] A determination module 200 is used to determine the change in each cylinder efficiency to each energy consumption index of the unit based on the operating parameters of the steam turbine, the change in high-pressure cylinder efficiency, the change in medium-pressure cylinder efficiency, and the change in low-pressure cylinder efficiency;

[0094] Among them, the energy consumption indicators include: heat consumption rate, power generation coal consumption rate, and power supply coal consumption rate.

[0095] In the embodiment of the present disclosure, the operating parameters include:

[0096] Steam turbine heat rate, proportion of high-pressure cylinder work in the overall work of the unit, proportion of medium-pressure cylinder work in the overall work of the unit, proportion of low-pressure cylinder work in the overall work of the unit, initial cylinder efficiency of high-pressure cylinder, initial cylinder efficiency of medium-pressure cylinder, initial cylinder efficiency of low-pressure cylinder, boiler efficiency, pipeline efficiency and plant power consumption rate.

[0097] In the embodiment of the present disclosure, as shown in FIG3 , the determining module 200 specifically includes:

[0098] The first determining unit 201 is configured to determine, based on the heat rate of the steam turbine, the proportion of the high-pressure cylinder work in the overall work of the unit, the proportion of the intermediate-pressure cylinder work in the overall work of the unit, the proportion of the low-pressure cylinder work in the overall work of the unit, the change in the high-pressure cylinder efficiency, the change in the intermediate-pressure cylinder efficiency, the change in the low-pressure cylinder efficiency, the high-pressure cylinder initial efficiency, the intermediate-pressure cylinder initial efficiency, and the low-pressure cylinder initial efficiency, respectively, a change in the heat rate of the unit caused by the change in the high-pressure cylinder efficiency, a change in the heat rate of the unit caused by the change in the intermediate-pressure cylinder efficiency, and a change in the heat rate of the unit caused by the change in the low-pressure cylinder efficiency;

[0099] The second determining unit 202 is configured to determine, based on the boiler efficiency and pipeline efficiency corresponding to the steam turbine, the change in the unit heat rate caused by the change in the high-pressure cylinder efficiency, the change in the unit heat rate caused by the change in the intermediate-pressure cylinder efficiency, and the change in the unit heat rate caused by the change in the low-pressure cylinder efficiency, respectively, a change in the unit power generation coal consumption rate caused by the change in the high-pressure cylinder efficiency, a change in the unit power generation coal consumption rate caused by the change in the intermediate-pressure cylinder efficiency, and a change in the unit power generation coal consumption rate caused by the change in the low-pressure cylinder efficiency;

[0100] The third determining unit 203 is used to determine the change in the unit power supply coal consumption rate caused by the high-pressure cylinder efficiency change, the change in the unit power supply coal consumption rate caused by the medium-pressure cylinder efficiency change, and the change in the unit power supply coal consumption rate caused by the low-pressure cylinder efficiency change, based on the plant power consumption rate corresponding to the steam turbine, the change in the unit power generation coal consumption rate caused by the high-pressure cylinder efficiency change, the change in the unit power generation coal consumption rate caused by the medium-pressure cylinder efficiency change, and the change in the unit power generation coal consumption rate caused by the low-pressure cylinder efficiency change.

[0101] It should be noted that the calculation formula for the change in the unit heat rate caused by the change in the high-pressure cylinder efficiency is as follows:

[0102] The calculation formula for the change in the unit heat rate caused by the change in the intermediate pressure cylinder efficiency is as follows:

[0103] The calculation formula for the change in the unit heat rate caused by the change in the low-pressure cylinder efficiency is as follows:

[0104] In the formula, Δq1 is the change in the unit heat rate caused by the change in the high-pressure cylinder efficiency, q is the turbine heat rate, α1% is the proportion of high-pressure cylinder work in the overall work of the unit, Δβ1% is the change in high-pressure cylinder efficiency, β1% is the initial high-pressure cylinder efficiency, Δq2 is the change in the unit heat rate caused by the change in the intermediate-pressure cylinder efficiency, α2% is the proportion of intermediate-pressure cylinder work in the overall work of the unit, Δβ2% is the change in intermediate-pressure cylinder efficiency, β2% is the initial intermediate-pressure cylinder efficiency, Δq3 is the change in the unit heat rate caused by the change in low-pressure cylinder efficiency, α3% is the proportion of low-pressure cylinder work in the overall work of the unit, Δβ3% is the change in low-pressure cylinder efficiency, and β3% is the initial low-pressure cylinder efficiency.

[0105] The calculation formula for the change in the unit's power generation coal consumption rate caused by the change in the high-pressure cylinder efficiency is as follows:

[0106] The calculation formula for the change in the unit's power generation coal consumption rate caused by the change in the intermediate pressure cylinder efficiency is as follows:

[0107] The calculation formula for the change in the unit's power generation coal consumption rate caused by the change in the low-pressure cylinder efficiency is as follows:

[0108] Where Δbf1 is the change in the unit's coal consumption rate due to the change in the high-pressure cylinder efficiency, ηp% is the pipeline efficiency, ηg% is the boiler efficiency, Δbf2 is the change in the unit's coal consumption rate due to the change in the medium-pressure cylinder efficiency, and Δbf3 is the change in the unit's coal consumption rate due to the change in the low-pressure cylinder efficiency.

[0109] The calculation formula for the change in the unit power supply coal consumption rate caused by the change in the high-pressure cylinder efficiency is as follows:

[0110] The calculation formula for the change in the unit power supply coal consumption rate caused by the change in the intermediate pressure cylinder efficiency is as follows:

[0111] The calculation formula for the change in the unit power supply coal consumption rate caused by the change in the low-pressure cylinder efficiency is as follows:

[0112] Where Δbg1 is the change in the unit's power supply coal consumption rate caused by the change in the high-pressure cylinder efficiency, τ% is the plant power consumption rate, Δbg2 is the change in the unit's power supply coal consumption rate caused by the change in the medium-pressure cylinder efficiency, and Δbg3 is the change in the unit's power supply coal consumption rate caused by the change in the low-pressure cylinder efficiency.

[0113] In summary, the present embodiment proposes a system for determining unit energy consumption index variables based on changes in turbine cylinder efficiency. This system determines the magnitude of the impact of changes in turbine cylinder efficiency on major economic indicators such as the unit's heat rate, power generation coal consumption rate, and power supply coal consumption rate. Complex thermal calculations are not required, and the impact results can be obtained through basic parameters. This facilitates guidance of production operations, allowing production personnel to quickly understand the impact of operating modes on the unit's economic efficiency, identify problems in a timely manner, and improve production management levels.

[0114] Example 3

[0115] To implement the above embodiments, the present disclosure further proposes an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method described in the first embodiment is implemented.

[0116] Example 4

[0117] In order to implement the above embodiments, the present disclosure further proposes a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method described in the first embodiment is implemented.

[0118] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0119] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0120] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A method for determining the variable of the unit energy consumption index based on the change of the steam turbine cylinder efficiency, characterized in that The method includes: Obtaining the operating parameters of the steam turbine at the current moment, the change amount of the high-pressure cylinder efficiency, the change amount of the intermediate-pressure cylinder efficiency, and the change amount of the low-pressure cylinder efficiency of the steam turbine; Respectively determining the change amounts of each cylinder efficiency on each energy consumption index of the unit according to the operating parameters of the steam turbine, the change amount of the high-pressure cylinder efficiency, the change amount of the intermediate-pressure cylinder efficiency, and the change amount of the low-pressure cylinder efficiency; Among them, the energy consumption indexes include: heat rate, power generation coal consumption rate, and power supply coal consumption rate.

2. The method according to claim 1, characterized in that The operating parameters include: Steam turbine heat rate, proportion of high-pressure cylinder work in the overall work of the unit, proportion of intermediate-pressure cylinder work in the overall work of the unit, proportion of low-pressure cylinder work in the overall work of the unit, initial efficiency of the high-pressure cylinder, initial efficiency of the intermediate-pressure cylinder, initial efficiency of the low-pressure cylinder, boiler efficiency, pipeline efficiency, and plant electricity consumption rate.

3. The method according to claim 2, wherein The step of respectively determining the change amounts of each cylinder efficiency on each energy consumption index of the unit according to the operating parameters of the steam turbine, the change amount of the high-pressure cylinder efficiency, the change amount of the intermediate-pressure cylinder efficiency, and the change amount of the low-pressure cylinder efficiency includes: Respectively determining the change amount of the unit heat rate caused by the change amount of the high-pressure cylinder efficiency, the change amount of the unit heat rate caused by the change amount of the intermediate-pressure cylinder efficiency, and the change amount of the unit heat rate caused by the change amount of the low-pressure cylinder efficiency according to the steam turbine heat rate, the proportion of high-pressure cylinder work in the overall work of the unit, the proportion of intermediate-pressure cylinder work in the overall work of the unit, the proportion of low-pressure cylinder work in the overall work of the unit, the change amount of the high-pressure cylinder efficiency, the change amount of the intermediate-pressure cylinder efficiency, the change amount of the low-pressure cylinder efficiency, the initial efficiency of the high-pressure cylinder, the initial efficiency of the intermediate-pressure cylinder, and the initial efficiency of the low-pressure cylinder; Respectively determining the change amount of the unit power generation coal consumption rate caused by the change amount of the high-pressure cylinder efficiency, the change amount of the unit power generation coal consumption rate caused by the change amount of the intermediate-pressure cylinder efficiency, and the change amount of the unit power generation coal consumption rate caused by the change amount of the low-pressure cylinder efficiency according to the boiler efficiency, the pipeline efficiency corresponding to the steam turbine, the change amount of the unit heat rate caused by the change amount of the high-pressure cylinder efficiency, the change amount of the unit heat rate caused by the change amount of the intermediate-pressure cylinder efficiency, and the change amount of the unit heat rate caused by the change amount of the low-pressure cylinder efficiency; Respectively determining the change amount of the unit power supply coal consumption rate caused by the change amount of the high-pressure cylinder efficiency, the change amount of the unit power supply coal consumption rate caused by the change amount of the intermediate-pressure cylinder efficiency, and the change amount of the unit power supply coal consumption rate caused by the change amount of the low-pressure cylinder efficiency according to the plant electricity consumption rate corresponding to the steam turbine, the change amount of the unit power generation coal consumption rate caused by the change amount of the high-pressure cylinder efficiency, the change amount of the unit power generation coal consumption rate caused by the change amount of the intermediate-pressure cylinder efficiency, and the change amount of the unit power generation coal consumption rate caused by the change amount of the low-pressure cylinder efficiency.

4. The method according to claim 3, characterized in that, The calculation formula for the change in the unit heat rate caused by the change in the cylinder efficiency of the high-pressure cylinder is as follows: The calculation formula for the change in the unit heat rate caused by the change in the cylinder efficiency of the intermediate-pressure cylinder is as follows: The calculation formula for the change in the unit heat rate caused by the change in the low-pressure cylinder efficiency is as follows: Wherein, Δq1 is the change in the unit heat consumption rate caused by the change in the high-pressure cylinder efficiency, q is the heat consumption rate of the steam turbine, α1% is the proportion of the high-pressure cylinder work in the overall work of the unit, Δβ1% is the change in the high-pressure cylinder efficiency, β1% is the initial high-pressure cylinder efficiency, Δq2 is the change in the unit heat consumption rate caused by the change in the intermediate-pressure cylinder efficiency, α2% is the proportion of the intermediate-pressure cylinder work in the overall work of the unit, Δβ2% is the change in the intermediate-pressure cylinder efficiency, β2% is the initial intermediate-pressure cylinder efficiency, Δq3 is the change in the unit heat consumption rate caused by the change in the low-pressure cylinder efficiency, α3% is the proportion of the low-pressure cylinder work in the overall work of the unit, Δβ3% is the change in the low-pressure cylinder efficiency, and β3% is the initial low-pressure cylinder efficiency.

5. The method according to claim 4, characterized in that The calculation formula for the change in the unit's power generation coal consumption rate caused by the change in the high-pressure cylinder efficiency is as follows: The calculation formula for the change in the unit's power generation coal consumption rate caused by the change in the medium-pressure cylinder efficiency is as follows: The calculation formula for the change in the unit's power generation coal consumption rate caused by the change in the low-pressure cylinder efficiency is as follows: Wherein, Δbf1 is the change in the unit power generation coal consumption rate caused by the change in the high-pressure cylinder efficiency, ηp% is the pipeline efficiency, ηg% is the boiler efficiency, Δbf2 is the change in the unit power generation coal consumption rate caused by the change in the intermediate-pressure cylinder efficiency, and Δbf3 is the change in the unit power generation coal consumption rate caused by the change in the low-pressure cylinder efficiency.

6. The method according to claim 5, wherein The calculation formula for the change in the unit power supply coal consumption rate caused by the change in the cylinder efficiency of the high-pressure cylinder is as follows: The calculation formula for the change in the unit's power supply coal consumption rate caused by the change in the cylinder efficiency of the intermediate pressure cylinder is as follows: The calculation formula for the change in the unit power supply coal consumption rate caused by the change in the low-pressure cylinder efficiency is as follows: Wherein, Δbg1 is the change in the unit power supply coal consumption rate caused by the change in the high-pressure cylinder efficiency, τ% is the auxiliary power consumption rate, Δbg2 is the change in the unit power supply coal consumption rate caused by the change in the intermediate-pressure cylinder efficiency, and Δbg3 is the change in the unit power supply coal consumption rate caused by the change in the low-pressure cylinder efficiency.

7. A unit energy consumption index variable determination system based on the change of steam turbine cylinder efficiency, characterized in that, The system includes: An acquisition module for acquiring the operating parameters of the steam turbine at the current moment, the change in the high-pressure cylinder efficiency, the change in the intermediate-pressure cylinder efficiency, and the change in the low-pressure cylinder efficiency of the steam turbine; A determination module for determining the change in each energy consumption index of the unit caused by each cylinder efficiency change respectively according to the operating parameters of the steam turbine, the change in the high-pressure cylinder efficiency, the change in the intermediate-pressure cylinder efficiency, and the change in the low-pressure cylinder efficiency; Wherein, the energy consumption indexes include: heat consumption rate, power generation coal consumption rate, and power supply coal consumption rate.

8. The system according to claim 7, wherein The operating parameters include: The heat consumption rate of the steam turbine, the proportion of the high-pressure cylinder work in the overall work of the unit, the proportion of the intermediate-pressure cylinder work in the overall work of the unit, the proportion of the low-pressure cylinder work in the overall work of the unit, the initial high-pressure cylinder efficiency, the initial intermediate-pressure cylinder efficiency, the initial low-pressure cylinder efficiency, the boiler efficiency, the pipeline efficiency, and the auxiliary power consumption rate.

9. An electronic device, characterized in that, It includes: A memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the method described in any one of claims 1-6 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, the method described in any one of claims 1-6 is implemented.

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