A method and system for obtaining the thermoelectric imbalance of an extraction condensing unit

Abstract

This invention discloses a method and system for obtaining the thermoelectric imbalance of an extraction-condensing turbine unit, comprising: determining the correlation coefficient K1 between the unit's main steam flow and load, and the correlation coefficient K2 between the unit's main steam flow and exhaust steam flow under no-heating extraction steam conditions; obtaining the unit's real-time main steam flow, real-time heating extraction steam flow, and actual operating load; determining the unit's exhaust steam flow based on the unit's real-time main steam flow, real-time heating extraction steam flow, correlation coefficient K2, and the design main steam flow and design exhaust steam flow under TMCR conditions; determining the unit load based on the real-time main steam flow, real-time heating steam flow, unit exhaust steam flow, and correlation coefficient K1; and obtaining the thermoelectric imbalance based on the unit load and actual operating load. This method accurately obtains the thermoelectric imbalance of the extraction-condensing turbine unit.

Description

Technical Field

[0001] This invention relates to the field of combined heat and power (CHP) units, and more particularly to a method and system for obtaining the heat and power imbalance of an extraction condensing unit. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] In terms of energy structure, to reduce the proportion of coal consumption, enhance the peak-shaving capacity of cogeneration units while ensuring residential heating, and provide space for new energy absorption, it is necessary to study the non-correlation between the heat and electricity loads of extraction condensing units adjusting the extraction steam turbine. Pure condensing units can flexibly adjust generator output power according to grid load requirements, while extraction condensing units, due to the limitation of extraction steam adjustment, are divided into different groups based on the extraction steam point, which changes the relationship between the unit's main steam flow and power. The flexibility transformation of extraction condensing units and the peak-shaving of cogeneration units both involve a key issue: how to determine the unit's load adjustability under the condition of meeting the unit's residential heating needs, i.e., whether the unit output can be adjusted by adjusting the main steam flow under the current extraction steam condition, becomes the basis for judging flexibility and peak-shaving capacity.

[0004] However, there is currently limited research on thermoelectric imbalance, and the accuracy of such research is relatively low. Summary of the Invention

[0005] To address the aforementioned problems, this invention proposes a method and system for obtaining the thermal-electric imbalance of extraction condensing units. This method can calculate the unit load based on the real-time main steam flow and heating extraction steam flow, thereby determining the thermal-electric imbalance based on the unit load and the actual operating load. Furthermore, it can accurately grasp the load adjustment space under the current extraction steam flow through the thermal-electric imbalance.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Firstly, a method for obtaining the thermoelectric imbalance of an extraction-condensing unit is proposed, including:

[0008] Determine the correlation coefficient K1 between the main steam flow and the load and the correlation coefficient K2 between the main steam flow and the exhaust steam flow of the unit under the condition of no heating steam extraction;

[0009] Obtain the unit's real-time main steam flow, real-time heating steam extraction flow, and actual operating load;

[0010] The unit exhaust steam flow rate is determined based on the real-time main steam flow rate, real-time heating extraction steam flow rate, correlation coefficient K2, and the design main steam flow rate and design exhaust steam flow rate under TMCR conditions.

[0011] The unit load is determined based on the real-time main steam flow, real-time heating steam flow, unit exhaust steam flow, and correlation coefficient K1.

[0012] The thermal-electric imbalance is obtained based on the unit load and the actual operating load.

[0013] Secondly, a system for obtaining the thermoelectric imbalance of an extraction condensing unit is proposed, including:

[0014] The coefficient determination module is used to determine the correlation coefficient K1 between the main steam flow and the load and the correlation coefficient K2 between the main steam flow and the exhaust steam flow of the unit under the condition of no heating steam extraction.

[0015] The data acquisition module is used to acquire the unit's real-time main steam flow, real-time heating steam extraction flow, and actual operating load;

[0016] The unit exhaust steam flow acquisition module is used to determine the unit exhaust steam flow based on the unit's real-time main steam flow, real-time heating extraction steam flow, correlation coefficient K2, and the design main steam flow and design exhaust steam flow under TMCR conditions.

[0017] The unit load acquisition module is used to determine the unit load based on the real-time main steam flow, real-time heating steam flow, unit exhaust steam flow, and correlation coefficient K1.

[0018] The thermoelectric imbalance acquisition module is used to obtain the thermoelectric imbalance based on the unit load and the actual operating load.

[0019] Thirdly, an electronic device is proposed, including a memory and a processor, as well as computer instructions stored in the memory and running on the processor. When the computer instructions are executed by the processor, they complete the steps described in the method for obtaining the thermoelectric imbalance of a condensing unit.

[0020] Fourthly, a computer-readable storage medium is proposed for storing computer instructions, which, when executed by a processor, complete the steps described in a method for obtaining the thermoelectric imbalance of an extraction condensing unit.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. This invention can calculate the unit load based on the real-time main steam flow and heating extraction steam flow, thereby determining the thermal-electric imbalance based on the unit load and the actual operating load, and then accurately grasping the load adjustment space under the current heating extraction steam flow through the thermal-electric imbalance.

[0023] 2. When calculating the thermoelectric imbalance, this invention considers the influence of the extraction steam position on the load, and calculates the unit load in two cases: extraction steam after the cold reheat and extraction steam before or after the cold reheat. This makes the obtained unit load more accurate, and thus the thermoelectric imbalance is obtained more accurately.

[0024] 3. When calculating the unit exhaust steam flow using real-time main steam flow and heating extraction steam flow, this invention considers the relationship between main steam flow and exhaust steam flow. When calculating the unit load using real-time main steam flow, heating extraction steam flow, and exhaust steam flow, it also considers the relationship between the unit's main steam flow and load, further ensuring the accuracy of the calculated unit load and thus ensuring the accuracy of the thermal-electric imbalance.

[0025] 4. When calculating the main steam flow rate, this invention considers the relationship between the main steam flow rate and the pressure of the high-pressure cylinder regulating stage, ensuring the accuracy of the obtained main steam flow rate, thereby effectively ensuring the accuracy of the thermoelectric imbalance.

[0026] Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0028] Figure 1 This is a flowchart of the method disclosed in Example 1;

[0029] Figure 2 This is a schematic diagram of a thermal system using a condensing unit.

[0030] The components are: 1. High-pressure section, 2. Medium-pressure section, 3. Low-pressure section, 4. Heat users, 5. Boiler, 6. Condenser, and 7. Generator. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0033] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0034] Example 1

[0035] like Figure 2 As shown, a thermal system using a condensing turbine unit includes a high-pressure section 1, an intermediate-pressure section 2, and a low-pressure section 3 of a steam turbine connected in sequence. The low-pressure section 3 is connected to a condenser 6. Any extraction port of the high-pressure section and the intermediate-pressure section of the steam turbine can supply steam to the heat user 4. The main steam outlet of the boiler 5 is connected to the high-pressure section 1 of the steam turbine, providing main steam to the high-pressure cylinder in the high-pressure section. The boiler 5 also receives cold reheat steam from the high-pressure cylinder to provide reheat steam to the intermediate-pressure cylinder in the intermediate-pressure section 2. The high-pressure section, the intermediate-pressure section, and the low-pressure section of the steam turbine are rigidly connected to the generator through a rotating shaft.

[0036] Extraction-condensing units, due to the limitation of steam extraction, restrict the flexibility of unit load regulation. They are divided into different groups based on the extraction point, altering the relationship between the main steam flow and power supplied by the boiler to the high-pressure cylinder. Both the flexibility modification of extraction-condensing units and peak shaving of cogeneration units involve a crucial issue: how to determine the unit's load adjustability under the condition of meeting the unit's residential heating needs. That is, whether the unit's output can be adjusted by regulating the main steam flow under the current extraction steam conditions becomes the basis for judging flexibility and peak shaving capabilities.

[0037] In this embodiment, a method for obtaining the thermoelectric imbalance of an extraction condensing unit is disclosed, such as... Figure 1 As shown, it includes:

[0038] S1: Determine the correlation coefficient K1 between the unit's main steam flow and load, and the correlation coefficient K2 between the unit's main steam flow and exhaust steam flow under the condition of no heating extraction steam.

[0039] Based on the heat balance diagrams of the unit's TMCR and THA operating conditions, the correlation coefficient K1 between the unit's main steam flow and load under the condition of no heating extraction steam was calculated.

[0040] Based on the heat balance diagrams of the unit's TMCR and TRL operating conditions, the correlation coefficient K2 between the unit's main steam flow and exhaust steam flow under the condition of no heating extraction is calculated.

[0041] Specifically:

[0042] Obtain the design output P of the extraction condensing unit under TMCR conditions.TMCRd and design main steam flow rate G TMCRd and the design output P under 30% THA conditions 30％THA and design main steam flow rate G 30％THA The design output P under TMCR conditions TMCRd Design output P under 30% THA condition 30％THA By subtracting the values, the design output difference is obtained, and the design main steam flow rate G under TMCR conditions is calculated. TMCRd and the design main steam flow rate G under 30% THA conditions 30％THA The difference is calculated to obtain the design main steam flow rate difference; the ratio of the design output difference to the design main steam flow rate difference is the correlation coefficient K1 between the unit's main steam flow rate and load under no-heating extraction steam conditions, and the specific formula is as follows:

[0043]

[0044] Among them, P TMCRd The design output of the unit under TMCR conditions is MW; P 30％THA The design output of the unit under 30% THA conditions, in MW; G TMCRd G represents the design main steam flow rate of the unit under TMCR conditions, in t / h; 30％THA The design main steam flow rate of the unit under 30% THA conditions, in t / h

[0045] Obtain the design exhaust steam flow rate G of the extraction condensing unit under TMCR conditions. exTMCRd and design main steam flow rate G TMCRd and the design exhaust steam flow rate G under 30% THA conditions ex30％THA and design main steam flow rate G 30％THA The design exhaust steam flow rate G under TMCR operating conditions exTMCRd Design exhaust flow rate G under 30% THA condition ex30％THA By subtracting the design exhaust steam flow rate, the design main steam flow rate G under TMCR conditions is obtained. TMCRd and the design main steam flow rate G under 30% THA conditions 30％THA The difference is calculated to obtain the design main steam flow rate difference; the ratio of the design exhaust steam flow rate difference to the design main steam flow rate difference is the correlation coefficient K2 between the unit's main steam flow rate and load under no-heating extraction steam conditions, and the specific formula is as follows:

[0046]

[0047] Among them, G exTMCRd G represents the design exhaust steam flow rate of the unit under TMCR conditions, in t / h; ex30％THA The design main steam flow rate of the unit under 30% THA conditions, in t / h.

[0048] Among them, the main steam flow rate of the unit is the main steam flow rate provided by the boiler to the high-pressure cylinder, the exhaust steam flow rate of the unit is the steam flow rate discharged from the low-pressure cylinder into the condenser, and the extraction steam flow rate is the steam flow rate provided to the heat users.

[0049] S2: Obtain the real-time main steam flow rate G of the unit ms Real-time heating steam extraction flow rate G cq And the actual operating load P.

[0050] To ensure the acquisition of real-time main steam flow rate G ms The accuracy of obtaining real-time main steam flow rate G ms At that time, the relationship between the main steam flow rate and the regulating stage pressure was considered, specifically:

[0051] The correlation coefficient K0 between the main steam flow rate and the regulating stage pressure of the unit under the condition of no heating extraction steam is obtained according to the Vlugel formula.

[0052]

[0053]

[0054] Among them, G THA The design main steam flow rate of the unit under THA conditions, in t / h; p zqTHA The design main steam valve pressure of the unit under THA conditions, in MPa; p tjTHA The pressure before the regulating stage of the unit under THA conditions, in MPa; p zqms The pressure at the main steam valve of the unit under actual operating conditions is expressed in MPa; p tjms The design pressure before the regulating stage of the unit under THA conditions is MPa. The main steam valve and regulating stage refer to the main steam valve and regulating stage in the high-pressure cylinder, respectively. THA p zqTHA p tjTHA and p tjms The heat balance diagrams were obtained from the unit's TMCR and THA operating conditions.

[0055] S3: Based on the unit's real-time main steam flow rate G ms Real-time heating steam extraction flow rate G cq The correlation coefficient K2 and the design main steam flow rate and design exhaust steam flow rate G under TMCR conditions. exTMCRd Determine the unit exhaust steam flow rate G ex .

[0056] The unit exhaust steam flow rate is obtained by subtracting the exhaust steam flow rate difference and the real-time heating extraction steam flow rate from the design exhaust steam flow rate under TMCR conditions. The exhaust steam flow rate difference is calculated by subtracting the design main steam flow rate G under TMCR conditions. TMCRdThe result is obtained by subtracting the real-time main steam flow rate and multiplying it by the correlation coefficient K2. The specific formula is as follows:

[0057] G ex =G exTMCRd -(G TMCRd -G ms )×K2-G cq

[0058] In the formula, G ms G represents the real-time main steam flow rate (t / h) under the current load; cq To monitor the heating steam extraction flow rate in real time under the current load, in t / h.

[0059] S4: Determine the unit load P based on the real-time main steam flow, real-time heating steam flow, unit exhaust steam flow, and correlation coefficient K1. js .

[0060] When determining the unit load, the impact of the extraction steam location on the load was considered, and the given main steam flow rate G was calculated based on the TMCR operating condition heat balance diagram. ms Heating extraction steam flow rate G cq The unit load is MW.

[0061] Specifically, the computer unit load is calculated in two scenarios: when the unit extracts steam after the cold reheat, and when the unit extracts steam before or after the cold reheat.

[0062] When the unit extracts steam after cooling:

[0063] P js =P TMCRd -(G TMCRd -G ms )×K1-G cq ×(h cq -h exTMCRd ) / 3600

[0064] -(h ex -h exTMCRd )×G ex / 3600

[0065] When the unit extracts steam during or before the cooling reheat:

[0066] P js =P TMCRd -(G TMCRd -G ms )×K1-G cq

[0067] ×(h cq -h exTMCRd +h hrh -h crh ) / 3600-(hex -h exTMCRd

[0068] ×G ex / 3600

[0069] In the formula, h hrh For reheat steam enthalpy; h crh Enthalpy of cold revaporation; h exTMCRd To design the low-pressure cylinder exhaust enthalpy for TMCR operating conditions; h ex The actual low-pressure cylinder exhaust enthalpy is determined by the back pressure p. c And the dryness fraction is determined to be 0.95; h cq The actual extraction enthalpy is determined by the extraction pressure Pcq and the extraction temperature Tcq.

[0070] S5: Obtain the thermoelectric imbalance based on the unit load and the actual operating load.

[0071] The thermal-electric imbalance is characterized by load deviation. The absolute value of the difference between the unit load and the actual operating load is divided by the unit load to obtain the thermal-electric imbalance σ. The specific formula is as follows:

[0072] σ=|P js -P| / P js ×100%

[0073] In the formula, P is the actual operating load of the unit, in MW.

[0074] This embodiment discloses a method for obtaining the thermal-electric imbalance of extraction-condensing units. When calculating the unit's exhaust steam flow using real-time main steam flow and heating extraction steam flow, the relationship between the main steam flow and exhaust steam flow is considered. Similarly, when calculating the unit load using real-time main steam flow, heating extraction steam flow, and exhaust steam flow, the relationship between the unit's main steam flow and load is considered. Furthermore, when calculating the thermal-electric imbalance, the impact of extraction steam location on the load is taken into account, calculating the unit load under two scenarios: extraction steam after cold reheat and extraction steam before or after cold reheat. This results in a more accurate obtained unit load, and the thermal-electric imbalance is accurately obtained based on this. The thermal-electric imbalance allows for a precise understanding of the load adjustment space under the current extraction steam flow. The concept of thermal-electric imbalance provides a supporting method for changing the load by adjusting the main steam flow under the current heating supply, thereby responding to the load allocation requirements of the power grid dispatching side. It can also serve as a basis for judging the load flexibility of extraction-condensing units under extraction steam conditions. Therefore, this method for obtaining the thermal-electric imbalance of extraction-condensing units is beneficial for load allocation by dispatching departments and flexibility assessment by government departments.

[0075] Taking the C670-28 / 0.5 / 600 / 620 extraction condensing turbine unit as an example, the calculation of the unit's thermoelectric imbalance under three scenarios—heating extraction steam flow rates of 0 t / h, 700 t / h, and 655 t / h—is presented, and the results are shown in the table below. In scenario 1, when the external steam supply flow rate is 0 t / h, the load near the design 40% THA condition is selected. The unit load under the design 40% THA condition is 268 MW, and the main steam flow rate is 685.134 t / h. The calculated thermoelectric imbalance for scenario 1 is 2.4%, indicating that this method has good accuracy in the low-load range. Scenario 2, when the unit's external steam supply flow rate is 700 t / h, selects the load near the design maximum extraction steam condition. The unit load under this design condition is 534.905 MW. Scenario 2, with a main steam flow rate of 1920.027 t / h, calculates a heat and power imbalance of 0.87%, indicating good accuracy of the method under maximum extraction conditions. Scenario 3, with an external steam supply flow rate of 655 t / h, selects a load near the rated dual extraction condition, designing a dual extraction condition unit load of 544.314 MW and a main steam flow rate of 1920.027 t / h. Scenario 3 calculates a heat and power imbalance of 1.32%, indicating good accuracy of the method under dual extraction conditions. All three selected scenarios represent extreme cases of unit extraction adjustment. In these scenarios, due to the limitation of extraction flow rate, it is impossible to change the unit load by altering the main steam flow rate; the main steam flow rate, extraction flow rate, and unit load have reached a balanced state. Therefore, this effectively proves that the imbalance calculation method in this invention is correct.

[0076]

[0077]

[0078] Scenario 1: When the external steam supply flow rate is 0t / h

[0079]

[0080] Scenario 2: When the unit's external steam supply flow rate is 700 t / h

[0081]

[0082] Scenario 3: When the unit's external steam supply flow rate is 655 t / h

[0083]

[0084]

[0085] Example 2

[0086] In this embodiment, a system for obtaining the thermoelectric imbalance of an extraction condensing unit is disclosed, comprising:

[0087] The coefficient determination module is used to determine the correlation coefficient K1 between the main steam flow and the load and the correlation coefficient K2 between the main steam flow and the exhaust steam flow of the unit under the condition of no heating steam extraction.

[0088] The data acquisition module is used to acquire the unit's real-time main steam flow, real-time heating steam extraction flow, and actual operating load;

[0089] The unit exhaust steam flow acquisition module is used to determine the unit exhaust steam flow based on the unit's real-time main steam flow, real-time heating extraction steam flow, correlation coefficient K2, and the design main steam flow and design exhaust steam flow under TMCR conditions.

[0090] The unit load acquisition module is used to determine the unit load based on the real-time main steam flow, real-time heating steam flow, unit exhaust steam flow, and correlation coefficient K1.

[0091] The thermoelectric imbalance acquisition module is used to obtain the thermoelectric imbalance based on the unit load and the actual operating load.

[0092] Example 3

[0093] In this embodiment, an electronic device is disclosed, including a memory and a processor, as well as computer instructions stored in the memory and running on the processor. When the processor executes the computer instructions, it completes the steps described in the method for obtaining the thermoelectric imbalance of a condensing unit disclosed in Embodiment 1.

[0094] Example 4

[0095] In this embodiment, a computer-readable storage medium is disclosed for storing computer instructions, which, when executed by a processor, complete the steps described in the method for obtaining the thermoelectric imbalance of a condensing unit disclosed in Embodiment 1.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A method for obtaining the thermoelectric imbalance of an extraction condensing unit, characterized in that, include: Determine the correlation coefficient between the unit's main steam flow and load under no-heating steam extraction conditions. and the correlation coefficient between the main steam flow rate and the exhaust steam flow rate of the unit ; Obtain the unit's real-time main steam flow, real-time heating steam extraction flow, and actual operating load; Based on the unit's real-time main steam flow, real-time heating extraction steam flow, and correlation coefficient The design main steam flow and design exhaust steam flow under TMCR conditions are used to determine the unit's exhaust steam flow. Based on real-time main steam flow, real-time heating steam flow, unit exhaust steam flow, and correlation coefficients Determine the unit load; The thermal-electric imbalance is obtained based on the unit load and the actual operating load; Among them, the computer unit load is calculated in two cases: when the unit extracts steam after the cold reheat, and when the unit extracts steam before or after the cold reheat. When the unit extracts steam after cooling: When the unit extracts steam during or before the cooling reheat: In the formula, For unit load, Contribute to the design of the unit under TMCR conditions. The design main steam flow rate of the unit under TMCR conditions. For real-time main steam flow, This refers to the steam extraction flow rate for heating. This refers to the exhaust steam flow rate of the unit. It is the enthalpy of reheated steam; It is the enthalpy of cold revaporation; To design the low-pressure cylinder exhaust enthalpy for TMCR operating conditions; The actual low-pressure cylinder exhaust enthalpy is determined by the back pressure. The dryness index was determined to be 0.

95. The actual extraction enthalpy is determined by the extraction pressure and extraction temperature.

2. The method for obtaining the thermoelectric imbalance of an extraction condensing unit as described in claim 1, characterized in that, Based on the heat balance diagrams for the unit's TMCR and THA operating conditions, the correlation coefficient between the unit's main steam flow and load under no-heating extraction steam conditions was calculated. ; Based on the heat balance diagrams for the unit's TMCR and TRL operating conditions, the correlation coefficient between the unit's main steam flow and exhaust steam flow under no-heating extraction steam conditions was calculated. .

3. The method for obtaining the thermoelectric imbalance of an extraction condensing unit as described in claim 2, characterized in that, Obtain the design exhaust steam flow rate and design main steam flow rate of the extraction condensing unit under TMCR conditions, and the design exhaust steam flow rate and design main steam flow rate under 30% THA conditions; The design exhaust flow rate difference is obtained by subtracting the design exhaust flow rate under TMCR condition from the design exhaust flow rate under 30%THA condition. The design main steam flow rate difference is obtained by subtracting the design main steam flow rate under TMCR condition from the design main steam flow rate under 30%THA condition. The ratio of the difference between the design exhaust steam flow rate and the difference between the main design steam flow rate is the correlation coefficient between the unit's main steam flow rate and the load under no-heating extraction steam conditions. .

4. The method for obtaining the thermoelectric imbalance of an extraction condensing unit as described in claim 2, characterized in that, Obtain the design output and design main steam flow rate of the extraction condensing unit under TMCR conditions, and the design output and design main steam flow rate under 30% THA conditions; The design output under TMCR condition is subtracted from the design output under 30% THA condition to obtain the design output difference value. The design main steam flow rate under TMCR condition is subtracted from the design main steam flow rate under 30% THA condition to obtain the design main steam flow rate difference value. The ratio of the design output difference to the design main steam flow difference is the correlation coefficient between the unit's main steam flow and load under no-heating extraction steam conditions. .

5. The method for obtaining the thermoelectric imbalance of an extraction condensing unit as described in claim 1, characterized in that, The unit exhaust steam flow rate is obtained by subtracting the exhaust steam flow rate difference and the real-time heating extraction steam flow rate from the design exhaust steam flow rate under TMCR conditions. The exhaust steam flow rate difference is calculated by subtracting the real-time main steam flow rate from the design main steam flow rate under TMCR conditions and then applying a correlation coefficient. Obtained by multiplication.

6. The method for obtaining the thermoelectric imbalance of an extraction condensing unit as described in claim 1, characterized in that, The thermal-electric imbalance is obtained by taking the absolute value of the difference between the unit load and the actual operating load and dividing it by the unit load.

7. A system for obtaining the thermoelectric imbalance of a condensing turbine unit, characterized in that, include: The coefficient determination module is used to determine the correlation coefficient between the unit's main steam flow and load under no-heating steam extraction conditions. and the correlation coefficient between the main steam flow rate and the exhaust steam flow rate of the unit ; The data acquisition module is used to acquire the unit's real-time main steam flow, real-time heating steam extraction flow, and actual operating load; The unit exhaust steam flow acquisition module is used to obtain the unit's real-time main steam flow, real-time heating extraction steam flow, and correlation coefficient. The design main steam flow and design exhaust steam flow under TMCR conditions are used to determine the unit's exhaust steam flow. The unit load acquisition module is used to obtain loads based on real-time main steam flow, real-time heating steam flow, unit exhaust steam flow, and correlation coefficients. Determine the unit load; among them, calculate the unit load in two cases: when the unit extracts steam after the cold reheat, and when the unit extracts steam before or after the cold reheat. When the unit extracts steam after cooling: When the unit extracts steam during or before the cooling reheat: In the formula, For unit load, Contribute to the design of the unit under TMCR conditions. The design main steam flow rate of the unit under TMCR conditions. For real-time main steam flow, This refers to the steam extraction flow rate for heating. This refers to the exhaust steam flow rate of the unit. It is the enthalpy of reheated steam; It is the enthalpy of cold revaporation; To design the low-pressure cylinder exhaust enthalpy for TMCR operating conditions; The actual low-pressure cylinder exhaust enthalpy is determined by the back pressure. The dryness index was determined to be 0.

95. The actual extraction steam enthalpy is determined by the extraction steam pressure and extraction steam temperature. The thermoelectric imbalance acquisition module is used to obtain the thermoelectric imbalance based on the unit load and the actual operating load.

8. An electronic device, characterized in that, It includes a memory and a processor, as well as computer instructions stored in the memory and running on the processor, which, when executed by the processor, complete the steps of the method for obtaining the thermoelectric imbalance of an extraction condensing unit as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, Used to store computer instructions, which, when executed by a processor, complete the steps of the method for obtaining the thermoelectric imbalance of an extraction condensing unit as described in any one of claims 1-6.

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