Combined cycle partial load correction method based on gas turbine partial load correction

Abstract

The present disclosure provides a combined cycle partial load correction method based on gas turbine partial load correction, and relates to the technical field of gas turbine and combined cycle performance test. The operating parameters of a gas-steam combined cycle unit under a test working condition are measured to obtain measured values of the operating parameters; based on the measured values, the value of the exhaust flow rate of the gas turbine under the test working condition is determined; the measured values of the power generation of the gas turbine and the exhaust temperature of the gas turbine, and the value of the exhaust flow rate of the gas turbine are corrected by using a gas turbine partial load correction curve to obtain the corrected values of the power generation of the gas turbine, the exhaust temperature and the exhaust flow rate; based on a steam turbine partial load correction curve and the values of the exhaust temperature and the exhaust flow rate of the gas turbine before and after correction, the measured value of the power generation of the steam turbine is corrected to obtain the corrected value of the power generation of the steam turbine; based on the corrected values of the power generation of the steam turbine and the power generation of the gas turbine, the correction data of the gas-steam combined cycle unit under the test working condition is determined.

Description

Technical Field

[0001] This disclosure relates to the field of gas turbine and combined cycle performance testing technology, and in particular to a combined cycle partial load correction method based on gas turbine partial load correction. Background Technology

[0002] In recent years, with the diversification of energy sources and the increasing demands on the stability and reliability of power grids, gas-steam combined cycle (GSCB) units, with their flexibility and high efficiency, have played a crucial role in power grid flexibility and peak shaving. As the operating time under partial load conditions gradually increases, the partial load performance of GSCB units has received increasing attention. More and more projects are imposing assessment requirements on the partial load performance of GSCB units, and field test data under partial load conditions also need to be corrected to a reference state point for evaluation and acceptance. Therefore, developing a GSCB partial load correction method to correct field test data under partial load conditions is a pressing issue that needs to be addressed. Summary of the Invention

[0003] This disclosure provides a combined cycle partial load correction method based on gas turbine partial load correction.

[0004] According to one aspect of this disclosure, a combined cycle partial load correction method based on gas turbine partial load correction is provided, comprising: The operating parameters of the gas-steam combined cycle unit under test conditions were measured to obtain the measured values ​​of the operating parameters, which include the gas turbine power generation, the steam turbine power generation, and the gas turbine exhaust temperature. Based on the measured values ​​of the operating parameters, the value of the gas turbine exhaust flow rate under the test conditions is determined; Using a preset gas turbine partial load correction curve, the measured values ​​of the gas turbine power generation, the gas turbine exhaust temperature, and the gas turbine exhaust flow rate are corrected to obtain the corrected values ​​of the gas turbine power generation, gas turbine exhaust temperature, and exhaust flow rate. Based on the preset steam turbine partial load correction curve, and the values ​​of gas turbine exhaust temperature and exhaust flow rate before and after correction, the measured value of the steam turbine power generation is corrected to obtain the corrected value of the steam turbine power generation. Based on the correction values ​​of the steam turbine power generation and the gas turbine power generation, the correction data of the gas-steam combined cycle unit under the test conditions are determined.

[0005] According to another aspect of this disclosure, a combined cycle partial load correction device based on gas turbine partial load correction is provided, comprising: The measurement module is used to measure the operating parameters of the gas-steam combined cycle unit under test conditions, such as gas turbine power generation, steam turbine power generation, and gas turbine exhaust temperature, to obtain the measured values ​​of the operating parameters, which include gas turbine power generation, steam turbine power generation, and gas turbine exhaust temperature. The first determining module is used to determine the value of the gas turbine exhaust flow rate under the test conditions based on the measured values ​​of the operating parameters. The first correction module is used to correct the measured values ​​of the gas turbine power generation, the gas turbine exhaust temperature, and the gas turbine exhaust flow rate using a preset gas turbine partial load correction curve, so as to obtain the corrected values ​​of the gas turbine power generation, gas turbine exhaust temperature, and exhaust flow rate. The second correction module is used to correct the measured value of the steam turbine power generation based on the preset steam turbine partial load correction curve and the values ​​of gas turbine exhaust temperature and exhaust flow rate before and after correction, so as to obtain the corrected value of the steam turbine power generation. The second determining module is used to determine the corrected data of the gas-steam combined cycle unit under the test conditions based on the corrected values ​​of the steam turbine power generation power and the gas turbine power generation power.

[0006] According to another aspect of this disclosure, an electronic device is provided, comprising: At least one processor; And, a memory that is communicatively connected to at least one processor; The memory stores instructions that can be executed by at least one processor, which enables the at least one processor to perform the methods of the above embodiments.

[0007] According to another aspect of this disclosure, a non-transitory computer-readable storage medium is provided storing computer instructions, wherein the computer instructions are used to cause a computer to perform the method according to the above embodiments.

[0008] According to another aspect of this disclosure, a computer program product is proposed, comprising a computer program that, when executed by a processor, implements the methods as described in the embodiments of this disclosure above.

[0009] This disclosure provides a combined cycle partial load correction method based on gas turbine partial load correction. First, the operating parameters of the gas-steam combined cycle unit under test conditions are measured to obtain the measured values ​​of these parameters. Based on these measured values, the gas turbine exhaust flow rate under test conditions is determined. Then, using a preset gas turbine partial load correction curve, the measured values ​​of gas turbine power generation, gas turbine exhaust temperature, and gas turbine exhaust flow rate are corrected to obtain corrected values ​​for these parameters. Next, based on a preset steam turbine partial load correction curve and the gas turbine exhaust temperature and flow rate before and after correction, the measured value of steam turbine power generation is corrected to obtain a corrected value for steam turbine power generation. Finally, based on the corrected values ​​for both steam turbine and gas turbine power generation, the corrected data for the gas-steam combined cycle unit under test conditions is determined. This led to the realization of a combined cycle partial load correction method based on gas turbine partial load correction, making the performance correction of combined cycle partial load performance tests operable and improving the reliability and accuracy of combined cycle partial load performance correction. Attached Figure Description

[0010] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0011] Figure 1 A schematic flowchart of a combined cycle partial load correction method based on gas turbine partial load correction provided in an embodiment of this disclosure; Figure 2 A schematic flowchart of a combined cycle partial load correction method based on gas turbine partial load correction provided in an embodiment of this disclosure; Figure 3 This is a flowchart illustrating the combined cycle partial load correction method based on gas turbine partial load correction proposed in this disclosure. Figure 4 This is a schematic diagram of a combined cycle partial load correction device based on gas turbine partial load correction, provided in an embodiment of this disclosure. Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this disclosure.

[0012] The accompanying drawings have illustrated specific embodiments of this disclosure, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this disclosure to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0013] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0014] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, data stored, data displayed, etc.) and signals involved in this disclosure are all authorized by the user or fully authorized by all parties, and the collection, use and processing of related data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0015] It should be noted that the acquisition, transmission, storage, use, and processing of data in this disclosed technical solution all comply with the relevant provisions of national laws and regulations.

[0016] The combined cycle partial load correction method based on gas turbine partial load correction according to embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic flowchart of a combined cycle partial load correction method based on gas turbine partial load correction, provided as an embodiment of the present disclosure.

[0018] like Figure 1 As shown, the method includes: Step 101: Measure the operating parameters of the gas-steam combined cycle unit under test conditions to obtain the measured values ​​of the operating parameters, which include the gas turbine power generation, the steam turbine power generation, and the gas turbine exhaust temperature.

[0019] It should be noted that the application scenarios of the combined cycle partial load correction method based on gas turbine partial load correction proposed in this disclosure can be set according to actual needs. For example, it can be applied to the partial load performance test scenario of gas-steam combined cycle units, correcting the test data under partial load to the data corresponding to the reference operating condition (which is the performance evaluation operating condition and can be set as needed, without limitation here) for performance evaluation and acceptance. This disclosure does not limit this.

[0020] Partial load refers to the operating state where the actual operating load (such as power, flow rate, computing power, processing capacity, etc.) of equipment, system, or component is lower than its rated load. Partial load in this disclosure can be set according to actual needs, and this disclosure does not impose any limitations on it.

[0021] The test conditions can be the conditions for combined cycle performance testing, which may include environmental temperature, pressure and relative humidity, etc. The value of each parameter can be set according to actual needs, and this disclosure does not limit it.

[0022] It should be noted that the partial load of the gas-steam combined cycle unit under the current test conditions can be set according to actual needs, and this disclosure does not limit it.

[0023] It should be noted that the operating parameters include, but are not limited to, the power generation capacity of the gas turbine, the power generation capacity of the steam turbine, and the exhaust temperature of the gas turbine. The specific parameters can be determined according to actual needs, and this disclosure does not limit them.

[0024] Gas turbines and steam turbines are components of combined cycle units.

[0025] Among them, "gas turbine exhaust" is an abbreviation for gas turbine exhaust.

[0026] In this disclosure, the power generation of the gas turbine, the power generation of the steam turbine, and the exhaust temperature of the gas turbine are measured under test conditions to obtain the measured values ​​of the power generation of the gas turbine, the power generation of the steam turbine, and the exhaust temperature of the gas turbine, thereby providing a data basis for subsequent combined cycle partial load correction.

[0027] Step 102: Based on the measured values ​​of the operating parameters, determine the value of the gas turbine exhaust flow rate under the test conditions.

[0028] It should be noted that the specific implementation method for determining the value of the gas turbine exhaust flow rate under test conditions based on the measured values ​​of operating parameters can be set according to actual needs, and this disclosure does not limit it.

[0029] For example, in some embodiments, the value of the gas turbine exhaust flow rate under test conditions can be determined using heat balance calculations based on measured values ​​of operating parameters. In this case, the operating parameters may include the parameters required for the heat balance calculations, and this disclosure does not limit this.

[0030] Step 103: Using the preset gas turbine partial load correction curve, correct the measured values ​​of gas turbine power generation, gas turbine exhaust temperature, and gas turbine exhaust flow rate to obtain the corrected values ​​of gas turbine power generation, gas turbine exhaust temperature, and exhaust flow rate.

[0031] In some embodiments, the gas turbine partial load correction curve is a curve showing the variation of at least one of the following: gas turbine power generation, gas turbine efficiency, gas turbine exhaust temperature, and gas turbine exhaust flow rate with at least one of the following: ambient temperature, ambient pressure, ambient relative humidity, intake pressure loss, exhaust pressure loss, fuel calorific value, and gas turbine frequency.

[0032] It should be noted that the partial load correction curve for the gas turbine can be completed in advance before the test.

[0033] In this disclosure, the measured values ​​of gas turbine power generation, exhaust temperature, and exhaust flow rate are corrected using the gas turbine partial load correction curve, thereby obtaining corrected values ​​for gas turbine power generation, exhaust temperature, and exhaust flow rate under test conditions. In other words, the corrected power generation, exhaust temperature, and exhaust flow rate values ​​of the gas turbine under partial load in the current test conditions can be obtained.

[0034] It should be noted that the specific implementation method for correcting the measured values ​​of gas turbine power generation, gas turbine exhaust temperature, and gas turbine exhaust flow rate using the preset gas turbine partial load correction curve can be set according to actual needs, and this disclosure does not limit it.

[0035] For example, in some embodiments, when correcting the measured values ​​of gas turbine power generation, gas turbine exhaust temperature, and gas turbine exhaust flow rate using a preset gas turbine partial load correction curve, the specific values ​​of the operating parameters under the current test conditions can be obtained first. Taking ambient temperature and pressure as an example, the correction coefficients for the gas turbine power generation under the ambient temperature and pressure of the test conditions can be determined based on the gas turbine partial load correction curve. Then, the correction coefficients corresponding to the two conditions are multiplied together, and the product is multiplied by the power generation to obtain the corrected value of the gas turbine power generation under the ambient temperature and pressure of the test conditions. The correction process for gas turbine exhaust temperature and flow rate is similar to the correction process for gas turbine power generation, and will not be described in detail here. This disclosure does not limit this aspect.

[0036] Step 104: Based on the preset steam turbine partial load correction curve and the values ​​of gas turbine exhaust temperature and exhaust flow rate before and after correction, correct the measured value of steam turbine power generation to obtain the corrected value of steam turbine power generation.

[0037] In some embodiments, since the exhaust parameters (exhaust temperature and exhaust flow rate) of the gas turbine in the gas-steam combined cycle unit are input conditions of the bottom steam cycle and can affect the performance of the steam turbine, the steam turbine partial load correction curve is a curve showing the change of steam turbine power generation with at least one of the gas turbine exhaust temperature and exhaust flow rate.

[0038] It should be noted that the partial load correction curve for the steam turbine can be completed in advance before the test.

[0039] The correction value for the steam turbine power generation is based on the corresponding partial load and operating condition data of the gas turbine.

[0040] In this disclosure, after correcting the power generation of the gas turbine, the measured value of the power generation of the steam turbine can be corrected based on the partial load correction curve of the steam turbine and the values ​​of the exhaust temperature and exhaust flow rate of the gas turbine before and after correction, so as to obtain the corrected value of the power generation of the steam turbine, thereby providing a data basis for subsequently determining the correction data of the combined cycle unit.

[0041] Step 105: Based on the correction values ​​of the steam turbine power generation and the gas turbine power generation, determine the correction data of the gas-steam combined cycle unit under the test conditions.

[0042] Among them, the correction data can be the corrected performance data of the combined cycle unit under partial load under the current test conditions.

[0043] In this disclosure, after correcting the power generation of the gas turbine and the steam turbine, the correction data of the gas-steam combined cycle unit under test conditions can be determined based on the correction values ​​of the steam turbine power generation and the gas turbine power generation. Thus, based on the partial load correction of the gas turbine, the partial load correction method of the steam turbine can be optimized. By applying this method, the partial load power generation of the steam turbine under test conditions can be corrected to the assessment conditions, thereby correcting and evaluating the partial load performance of the combined cycle system. This method has operability and high engineering application value.

[0044] In some embodiments, the correction data of the gas-steam combined cycle unit under test conditions is determined based on the correction values ​​of the steam turbine power generation and the gas turbine power generation. The corrected heat rate of the gas turbine under the current load can also be obtained. Then, the corrected power generation and heat rate of the gas turbine and the power generation of the steam turbine are combined to calculate the correction data of the combined cycle performance under this partial load condition. This disclosure does not limit this.

[0045] In this embodiment, the operating parameters of the gas-steam combined cycle unit under test conditions are first measured to obtain the measured values ​​of the operating parameters. Based on the measured values ​​of the operating parameters, the value of the gas turbine exhaust flow rate under test conditions is determined. Then, using a preset gas turbine partial load correction curve, the measured values ​​of the gas turbine power generation, gas turbine exhaust temperature, and gas turbine exhaust flow rate are corrected to obtain the corrected values ​​of the gas turbine power generation, gas turbine exhaust temperature, and exhaust flow rate. Subsequently, based on the preset steam turbine partial load correction curve and the values ​​of gas turbine exhaust temperature and exhaust flow rate before and after correction, the measured value of the steam turbine power generation is corrected to obtain the corrected value of the steam turbine power generation. Finally, based on the corrected values ​​of the steam turbine power generation and the gas turbine power generation, the corrected data of the gas-steam combined cycle unit under test conditions is determined. Therefore, by using the gas turbine partial load correction curve, the power generation, exhaust temperature, and exhaust flow of the gas turbine under test conditions are corrected. Furthermore, based on the steam turbine partial load correction curve, the influence of gas turbine exhaust temperature and exhaust flow on steam turbine performance is analyzed. This leads to the correction of steam turbine power generation and the performance correction of the combined cycle unit. Thus, a method for partial load correction of combined cycle units based on gas turbine partial load correction is realized, making the performance correction of combined cycle partial load performance tests operable and improving the reliability and accuracy of combined cycle partial load performance correction.

[0046] Figure 2 This is a schematic flowchart of a combined cycle partial load correction method based on gas turbine partial load correction, provided as an embodiment of the present disclosure.

[0047] like Figure 2 As shown, the method includes: Step 201: Measure the operating parameters of the gas-steam combined cycle unit under test conditions to obtain the measured values ​​of the operating parameters, which include the gas turbine power generation, the steam turbine power generation, and the gas turbine exhaust temperature.

[0048] Step 202: Based on the measured values ​​of the operating parameters, determine the value of the gas turbine exhaust flow rate under the test conditions.

[0049] Step 203: Using the preset gas turbine partial load correction curve, correct the measured values ​​of gas turbine power generation, gas turbine exhaust temperature, and gas turbine exhaust flow rate to obtain the corrected values ​​of gas turbine power generation, gas turbine exhaust temperature, and exhaust flow rate.

[0050] The specific implementation of steps 201 to 203 can be found in the detailed descriptions of other embodiments in this disclosure, and will not be repeated here.

[0051] Step 204: Based on the values ​​of gas turbine exhaust temperature and exhaust flow rate before and after correction, and the preset steam turbine partial load correction curve, determine the first correction coefficient of gas turbine exhaust temperature on steam turbine power generation and the second correction coefficient of gas turbine exhaust flow rate on steam turbine power generation.

[0052] The first correction factor is the correction factor for the change in steam turbine power generation with gas turbine exhaust temperature.

[0053] The second correction factor is the correction factor for the change in steam turbine power generation with gas turbine exhaust flow.

[0054] It should be noted that the specific implementation method for determining the first correction coefficient and the second correction coefficient can be set according to actual needs, and this disclosure does not limit it.

[0055] For example, in some embodiments, a first relationship can be determined based on the values ​​of the gas turbine exhaust temperature before and after correction, and a second relationship can be determined based on the values ​​of the gas turbine exhaust flow rate before and after correction. Based on the first and second relationships, a first correction coefficient for the gas turbine exhaust temperature on the steam turbine power generation and a second correction coefficient for the gas turbine exhaust flow rate on the steam turbine power generation are determined using a preset steam turbine partial load correction curve. This disclosure does not limit this aspect.

[0056] The first relationship is the relationship between the measured value and the correction value of the gas turbine exhaust temperature.

[0057] The second relationship is the relationship between the gas turbine exhaust flow rate before correction and the corrected value after correction.

[0058] It should be noted that the specific implementation method for determining the first and second relationships can be set according to actual needs, and this disclosure does not limit it.

[0059] For example, in some embodiments, the first relationship and the second relationship can be determined by determining the ratio of the values ​​of the gas turbine exhaust temperature and exhaust flow rate before and after correction. That is, the first relationship can be the ratio of the values ​​of the gas turbine exhaust temperature before and after correction, and the second relationship can be the ratio of the values ​​of the gas turbine exhaust flow rate before and after correction; this disclosure does not limit this.

[0060] Step 205: Based on the first correction factor and the second correction factor, correct the measured value of the steam turbine power generation to obtain the corrected value of the steam turbine power generation.

[0061] In this disclosure, after determining the first correction factor for the change of steam turbine power generation with gas turbine exhaust temperature and the second correction factor for the change of steam turbine power generation with gas turbine exhaust flow rate, the measured value of steam turbine power generation can be corrected based on the first correction factor and the second correction factor to obtain the corrected value of steam turbine power generation.

[0062] It should be noted that the specific implementation method for correcting the measured value of the steam turbine power generation based on the first correction coefficient and the second correction coefficient can be set according to actual needs, and this disclosure does not limit it.

[0063] For example, in some embodiments, the first correction factor, the second correction factor, and the measured value of the steam turbine power generation can be multiplied together to obtain the corrected steam turbine power generation, but this disclosure does not limit this.

[0064] Therefore, the formula for calculating the corrected power output of the steam turbine can be shown below. This formula is merely an example and is not intended to be limiting: , in, This is a correction value for the power generation capacity of the steam turbine; This is the first correction factor; This is the second correction factor; This represents the measured power output of the steam turbine.

[0065] Step 206: Based on the correction values ​​of the steam turbine power generation and the gas turbine power generation, determine the correction data of the gas-steam combined cycle unit under the test conditions.

[0066] The specific implementation of step 206 can be found in the detailed descriptions of other embodiments in this disclosure, and will not be repeated here.

[0067] In this embodiment, the operating parameters of the gas-steam combined cycle unit under test conditions are first measured to obtain the measured values ​​of the operating parameters. Based on the measured values ​​of the operating parameters, the value of the gas turbine exhaust flow rate under test conditions is determined. Then, using a preset gas turbine partial load correction curve, the measured values ​​of the gas turbine power generation, gas turbine exhaust temperature, and gas turbine exhaust flow rate are corrected to obtain the corrected values ​​of the gas turbine power generation, gas turbine exhaust temperature, and exhaust flow rate. Based on the gas turbine exhaust temperature and exhaust flow rate before and after correction, and the preset steam turbine partial load correction curve, a first correction coefficient for the gas turbine exhaust temperature on the steam turbine power generation and a second correction coefficient for the gas turbine exhaust flow rate on the steam turbine power generation are determined. Then, based on the first and second correction coefficients, the measured value of the steam turbine power generation is corrected to obtain the corrected value of the steam turbine power generation. Finally, based on the corrected values ​​of the steam turbine power generation and the gas turbine power generation, the corrected data of the gas-steam combined cycle unit under test conditions is determined. Therefore, by using the values ​​of gas turbine exhaust temperature and exhaust flow rate before and after correction, as well as the steam turbine partial load correction curve, the correction coefficients of gas turbine exhaust temperature and exhaust flow rate on steam turbine power generation are determined, and the steam turbine power generation is corrected based on the correction coefficients, thereby improving the accuracy of steam turbine power generation correction, and thus determining the correction data of combined cycle performance, improving the reliability of combined cycle partial load correction based on gas turbine partial load correction.

[0068] The following is combined with Figure 3 The process of the combined cycle partial load correction method based on gas turbine partial load correction proposed in this disclosure is illustrated with an example. Figure 3 This is a schematic flowchart of the combined cycle partial load correction method based on gas turbine partial load correction proposed in this disclosure. Figure 3 The process shown is merely an example and is not intended to be limiting.

[0069] like Figure 3As shown, a partial load correction curve for the gas turbine was pre-compiled before the test. Under the test conditions, the operating parameters of the gas-steam combined cycle unit, such as the gas turbine power generation, steam turbine power generation, and gas turbine exhaust temperature, were measured. The gas turbine exhaust flow rate under the test conditions was obtained through heat balance calculation. Then, based on the partial load correction curve for the gas turbine, the gas turbine exhaust temperature and exhaust flow rate under the test conditions were corrected. A first correction coefficient was determined based on the gas turbine exhaust temperature before and after correction, and a second correction coefficient was determined based on the gas turbine exhaust flow rate before and after correction. Subsequently, the steam turbine power generation was corrected using the first and second correction coefficients, and the gas turbine power generation was corrected using the partial load correction curve for the gas turbine. Finally, based on the corrected steam turbine power generation and gas turbine power generation, the corrected data for the combined cycle partial load were determined.

[0070] It should be noted that, Figure 3 The specific implementation of each step in the process shown can be referred to the relevant description in the above embodiments of this disclosure, and will not be repeated here.

[0071] To achieve the above embodiments, this disclosure also proposes a combined cycle partial load correction device based on gas turbine partial load correction.

[0072] Figure 4 This is a schematic diagram of a combined cycle partial load correction device based on gas turbine partial load correction, provided in an embodiment of this disclosure.

[0073] like Figure 4 As shown, the combined cycle partial load correction device 400 based on gas turbine partial load correction may include: The measurement module 401 is used to measure the operating parameters of the gas-steam combined cycle unit under test conditions and obtain the measured values ​​of the operating parameters, including the gas turbine power generation, the steam turbine power generation, and the gas turbine exhaust temperature. The first determining module 402 is used to determine the value of the gas turbine exhaust flow rate under the test conditions based on the measured values ​​of the operating parameters. The first correction module 403 is used to correct the measured values ​​of gas turbine power generation and gas turbine exhaust temperature, as well as the value of gas turbine exhaust flow rate, using a preset gas turbine partial load correction curve, so as to obtain the corrected values ​​of gas turbine power generation, gas turbine exhaust temperature and exhaust flow rate. The second correction module 404 is used to correct the measured value of the steam turbine power generation based on the preset steam turbine partial load correction curve and the values ​​of gas turbine exhaust temperature and exhaust flow before and after correction, so as to obtain the corrected value of the steam turbine power generation. The second determining module 405 is used to determine the corrected data of the gas-steam combined cycle unit under test conditions based on the correction values ​​of the steam turbine power generation power and the gas turbine power generation power.

[0074] Optionally, the second correction module 404 described above is specifically used for: Based on the values ​​of gas turbine exhaust temperature and exhaust flow rate before and after correction, and the preset steam turbine partial load correction curve, the first correction coefficient of gas turbine exhaust temperature on steam turbine power generation and the second correction coefficient of gas turbine exhaust flow rate on steam turbine power generation are determined. Based on the first correction factor and the second correction factor, the measured value of the steam turbine power generation is corrected to obtain the corrected value of the steam turbine power generation.

[0075] Optionally, the second correction module 404 described above is further configured to: The first relationship is determined based on the values ​​of the gas turbine exhaust temperature before and after the correction, and the second relationship is determined based on the values ​​of the gas turbine exhaust flow rate before and after the correction. Based on the first and second relationships, and using the preset steam turbine partial load correction curve, the first correction coefficient of the gas turbine exhaust temperature on the steam turbine power generation and the second correction coefficient of the gas turbine exhaust flow rate on the steam turbine power generation are determined respectively.

[0076] Optionally, the second correction module 404 described above is further configured to: The corrected steam turbine power generation is obtained by multiplying the first correction factor, the second correction factor, and the measured value of the steam turbine power generation.

[0077] Optionally, the above-mentioned gas turbine partial load correction curve is a curve showing the variation of at least one of the following: gas turbine power generation, gas turbine efficiency, gas turbine exhaust temperature, and gas turbine exhaust flow rate with at least one of the following: ambient temperature, ambient pressure, ambient relative humidity, intake pressure loss, exhaust pressure loss, fuel calorific value, and gas turbine frequency. The steam turbine partial load correction curve is a curve showing the change in steam turbine power generation with at least one of the gas turbine exhaust temperature and gas turbine exhaust flow rate.

[0078] Optionally, the first determining module 402 described above is specifically used for: Based on the measured values ​​of operating parameters, the value of the gas turbine exhaust flow rate under test conditions was determined using thermal balance calculations.

[0079] The functions and specific implementation principles of the modules described in this embodiment can be found in the above method embodiments, and will not be repeated here.

[0080] In this disclosure, the operating parameters of the gas-steam combined cycle unit under test conditions are first measured to obtain the measured values ​​of the operating parameters. Based on the measured values ​​of the operating parameters, the value of the gas turbine exhaust flow rate under test conditions is determined. Then, using a preset gas turbine partial load correction curve, the measured values ​​of the gas turbine power generation, gas turbine exhaust temperature, and gas turbine exhaust flow rate are corrected to obtain the corrected values ​​of the gas turbine power generation, gas turbine exhaust temperature, and exhaust flow rate. Subsequently, based on the preset steam turbine partial load correction curve and the values ​​of gas turbine exhaust temperature and exhaust flow rate before and after correction, the measured value of the steam turbine power generation is corrected to obtain the corrected value of the steam turbine power generation. Finally, based on the corrected values ​​of the steam turbine power generation and gas turbine power generation, the corrected data of the gas-steam combined cycle unit under test conditions are determined. Therefore, by using the gas turbine partial load correction curve, the power generation, exhaust temperature, and flow rate of the gas turbine under test conditions are corrected. Furthermore, based on the steam turbine partial load correction curve, the influence of gas turbine exhaust temperature and flow rate on steam turbine performance is analyzed. This leads to the correction of steam turbine power generation and combined cycle performance, thus realizing a combined cycle partial load correction method based on gas turbine partial load correction. This makes the combined cycle partial load performance test performance correction operable and improves the reliability and accuracy of combined cycle partial load performance correction.

[0081] Figure 5 A block diagram of an exemplary electronic device suitable for implementing embodiments of the present disclosure is shown.

[0082] Figure 5 The electronic device 12 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments disclosed herein.

[0083] like Figure 5As shown, electronic device 12 is represented in the form of a general-purpose computing device. Components of electronic device 12 may include, but are not limited to: one or more processors or processing units 16, memory 28, and a bus 18 connecting different system components (including memory 28 and processing unit 16). Bus 18 represents one or more of several bus architectures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the various bus architectures. For example, these architectures include, but are not limited to, Industry Standard Architecture (ISA) bus, Micro Channel Architecture (MCA) bus, Enhanced ISA bus, Video Electronics Standards Association (VESA) local bus, and Peripheral Component Interconnect (PCI) bus.

[0084] Electronic device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by electronic device 12, including volatile and non-volatile media, removable and non-removable media.

[0085] Memory 28 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) 30 and / or cache 32. Electronic device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 34 may be used to read and write non-removable, non-volatile magnetic media (… Figure 5 Not shown; usually referred to as a "hard drive".

[0086] although Figure 5As not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk") and an optical disc drive for reading and writing to a removable non-volatile optical disc (e.g., a compact disc read-only memory (CD-ROM), a digital video disc read-only memory (DVD-ROM), or other optical media) may be provided. In these cases, each drive may be connected to bus 18 via one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of this disclosure.

[0087] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. Program modules 42 typically perform the functions and / or methods described in the embodiments of this disclosure.

[0088] Electronic device 12 can also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), and with one or more devices that enable human interaction with electronic device 12, and / or with any device that enables electronic device 12 to communicate with one or more other computing devices (e.g., network card, modem, etc.). This communication can be performed via input / output (I / O) interface 22. Furthermore, electronic device 12 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 20. As shown, network adapter 20 communicates with other modules of electronic device 12 via bus 18. It should be understood that, although not shown in the figures, other hardware and / or software modules can be used in conjunction with electronic device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0089] The processing unit 16 executes various functional applications and parameter information determinations by running programs stored in the memory 28, such as implementing the combined cycle partial load correction method based on gas turbine partial load correction mentioned in the foregoing embodiments.

[0090] To implement the above embodiments, this disclosure also proposes a non-transitory computer-readable storage medium storing a computer program that, when executed by a processor, implements the combined cycle partial load correction method based on gas turbine partial load correction as proposed in the foregoing embodiments of this disclosure.

[0091] To implement the above embodiments, this disclosure also proposes a computer program product that, when executed by an instruction processor, performs a combined cycle partial load correction method based on gas turbine partial load correction as proposed in the foregoing embodiments of this disclosure.

[0092] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0093] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

[0094] It should be noted that in the description of this disclosure, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0095] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0096] It should be understood that various parts of this disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0097] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0098] Furthermore, the functional units in the various embodiments of this disclosure can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0099] The storage media mentioned above can be read-only memory, disk, or optical disk, etc.

[0100] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0101] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A combined cycle partial load correction method based on gas turbine partial load correction, characterized in that, include: The operating parameters of the gas-steam combined cycle unit under test conditions were measured to obtain the measured values ​​of the operating parameters, which include the gas turbine power generation, the steam turbine power generation, and the gas turbine exhaust temperature. Based on the measured values ​​of the operating parameters, the value of the gas turbine exhaust flow rate under the test conditions is determined; Using a preset gas turbine partial load correction curve, the measured values ​​of the gas turbine power generation, the gas turbine exhaust temperature, and the gas turbine exhaust flow rate are corrected to obtain the corrected values ​​of the gas turbine power generation, gas turbine exhaust temperature, and exhaust flow rate. Based on the preset steam turbine partial load correction curve, and the values ​​of gas turbine exhaust temperature and exhaust flow rate before and after correction, the measured value of the steam turbine power generation is corrected to obtain the corrected value of the steam turbine power generation. Based on the correction values ​​of the steam turbine power generation and the gas turbine power generation, the correction data of the gas-steam combined cycle unit under the test conditions are determined.

2. The method as described in claim 1, characterized in that, The method of correcting the measured value of the steam turbine power generation based on a preset steam turbine partial load correction curve and the values ​​of gas turbine exhaust temperature and exhaust flow rate before and after correction, to obtain the corrected value of the steam turbine power generation, includes: Based on the values ​​of gas turbine exhaust temperature and exhaust flow rate before and after correction, and the preset steam turbine partial load correction curve, a first correction coefficient of the gas turbine exhaust temperature on the steam turbine power generation and a second correction coefficient of the gas turbine exhaust flow rate on the steam turbine power generation are determined. Based on the first correction coefficient and the second correction coefficient, the measured value of the steam turbine power generation is corrected to obtain the corrected value of the steam turbine power generation.

3. The method as described in claim 2, characterized in that, The determination of a first correction coefficient for the gas turbine exhaust temperature and exhaust flow rate on the power generation of the steam turbine, and a second correction coefficient for the gas turbine exhaust flow rate on the power generation of the steam turbine, based on the values ​​of the gas turbine exhaust temperature and exhaust flow rate before and after correction, and a preset steam turbine partial load correction curve, includes: The first relationship is determined based on the values ​​of the gas turbine exhaust temperature before and after the correction, and the second relationship is determined based on the values ​​of the gas turbine exhaust flow rate before and after the correction. Based on the first relationship and the second relationship, using the preset steam turbine partial load correction curve, the first correction coefficient of the gas turbine exhaust temperature on the power generation of the steam turbine and the second correction coefficient of the gas turbine exhaust flow rate on the power generation of the steam turbine are determined respectively.

4. The method as described in claim 2, characterized in that, The step of correcting the measured value of the steam turbine's power generation based on the first correction coefficient and the second correction coefficient to obtain the corrected steam turbine power generation includes: The corrected steam turbine power generation is obtained by multiplying the first correction coefficient, the second correction coefficient, and the measured value of the steam turbine power generation.

5. The method as described in claim 1, characterized in that, The gas turbine partial load correction curve is a curve showing the variation of at least one of the following: gas turbine power generation, gas turbine efficiency, gas turbine exhaust temperature, and gas turbine exhaust flow rate with at least one of the following: ambient temperature, ambient pressure, ambient relative humidity, intake pressure loss, exhaust pressure loss, fuel calorific value, and gas turbine frequency. The steam turbine partial load correction curve is a curve showing the change in steam turbine power generation with at least one of the gas turbine exhaust temperature and gas turbine exhaust flow rate.

6. The method as described in claim 1, characterized in that, Determining the gas turbine exhaust flow rate under the test conditions based on the measured values ​​includes: Based on the measured values ​​of the operating parameters, the value of the gas turbine exhaust flow rate under the test conditions is determined using thermal balance calculations.

7. A combined cycle partial load correction device based on gas turbine partial load correction, characterized in that, include: The measurement module is used to measure the operating parameters of the gas-steam combined cycle unit under test conditions and obtain the measured values ​​of the operating parameters, which include the gas turbine power generation, the steam turbine power generation, and the gas turbine exhaust temperature. The first determining module is used to determine the value of the gas turbine exhaust flow rate under the test conditions based on the measured values ​​of the operating parameters. The first correction module is used to correct the measured values ​​of the gas turbine power generation, the gas turbine exhaust temperature, and the gas turbine exhaust flow rate using a preset gas turbine partial load correction curve, so as to obtain the corrected values ​​of the gas turbine power generation, gas turbine exhaust temperature, and exhaust flow rate. The second correction module is used to correct the measured value of the steam turbine power generation based on the preset steam turbine partial load correction curve and the values ​​of gas turbine exhaust temperature and exhaust flow rate before and after correction, so as to obtain the corrected value of the steam turbine power generation. The second determining module is used to determine the corrected data of the gas-steam combined cycle unit under the test conditions based on the corrected values ​​of the steam turbine power generation power and the gas turbine power generation power.

8. An electronic device, characterized in that, include: At least one processor; And, a memory communicatively connected to the at least one processor; The memory stores instructions executable by the at least one processor, which are executed by the at least one processor to cause the at least one processor to perform the combined cycle partial load correction method based on gas turbine partial load correction as described in any one of claims 1-6.

9. A non-transitory computer-readable storage medium storing computer instructions, characterized in that, The computer instructions are used to cause the computer to execute the combined cycle partial load correction method based on gas turbine partial load correction according to any one of claims 1-6.

10. A computer program product, characterized in that, It includes a computer program that, when executed by a processor, implements the combined cycle partial load correction method based on gas turbine partial load correction according to any one of claims 1-6.

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