Combined cycle unit whole-process intelligent control system and method based on large model analysis

Abstract

This invention discloses a fully intelligent control system and method for combined cycle power units based on large-scale model analysis. The system includes a first, second, third, and fourth fully intelligent control sequential control command feedback unit, as well as a first, second, third, and fourth fully intelligent control sequential control command unit. This system and method can rapidly generate optimal control parameters, simultaneously considering system efficiency, equipment lifespan, energy consumption, and emissions targets during start-up, operation, and shutdown control, thereby improving the system's response speed to load changes.

Description

Technical Field

[0001] This invention belongs to the field of intelligent control of gas-steam combined cycle units, and relates to an intelligent control system and method for the entire process of combined cycle units based on large model analysis. Background Technology

[0002] With the rapid development of the energy industry, combined cycle power units have become an important component of modern power systems due to their high efficiency and clean power generation characteristics. Especially with the large-scale integration of renewable energy, the power grid places higher demands on the flexibility of unit start-up and shutdown, load response speed, and operating efficiency. Traditional combined cycle unit control methods rely on manual experience or fixed control parameters, making it difficult to adapt to complex and changing operating conditions, leading to problems such as low system operating efficiency, increased energy consumption, and accelerated equipment wear. Therefore, achieving intelligent control of combined cycle power units throughout the entire process using advanced large-scale model analysis technology has become an important direction for improving the overall performance of the system.

[0003] Combined cycle power unit operation involves multiple subsystems such as gas turbines, waste heat boilers, and steam turbines. The coupling between these systems is complex, and the start-up and shutdown processes place high demands on equipment status, energy efficiency, and environmental performance. Traditional control methods generally suffer from the following problems: 1) Complex coupling of multiple systems: The subsystems are interdependent, and multiple parameters need to be coordinated during startup and shutdown. Local optimization can easily lead to a decline in overall performance.

[0004] 2) Insufficient dynamic response capability: When faced with grid load fluctuations, the unit starts and stops slowly, making it difficult to meet the high-frequency peak shaving requirements.

[0005] 3) Real-time optimization is difficult: Existing control strategies lack adaptability to real-time operating conditions and are difficult to dynamically adjust parameters in complex environments.

[0006] 4) Difficulty in energy consumption and emission control: It is difficult to achieve both low energy consumption and low emission targets while ensuring system efficiency.

[0007] There is an urgent need to develop a system that can quickly generate optimal control parameters based on large models of real-time data, and simultaneously consider objectives such as system efficiency, equipment lifespan, energy consumption, and emissions during start-up and shutdown control, thereby improving the system's response speed to load changes. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fully intelligent control system and method for combined cycle units based on large model analysis. This system and method can quickly generate optimal control parameters and simultaneously take into account the targets of system efficiency, equipment life, energy consumption and emissions during start-up, operation and shutdown control, thereby improving the system's response speed to load changes.

[0009] To achieve the above objectives, this invention discloses a fully intelligent control system for combined cycle power units based on large model analysis, comprising a first fully intelligent control sequential control command feedback unit, a second fully intelligent control sequential control command feedback unit, a third fully intelligent control sequential control command feedback unit, a fourth fully intelligent control sequential control command feedback unit, a first fully intelligent control sequential control command unit, a second fully intelligent control sequential control command unit, a third fully intelligent control sequential control command unit, and a fourth fully intelligent control sequential control command unit; The first intelligent control sequential control command feedback unit is connected to the FB1 terminal of the combined cycle unit intelligent control sequential control step sequence control function module based on large model analysis; the second intelligent control sequential control command feedback unit is connected to the FB2 terminal of the combined cycle unit intelligent control sequential control step sequence control function module based on large model analysis; the third intelligent control sequential control command feedback unit is connected to the FB3 terminal of the combined cycle unit intelligent control sequential control step sequence control function module based on large model analysis; the fourth intelligent control sequential control command feedback unit is connected to the FB4 terminal of the combined cycle unit intelligent control sequential control step sequence control function module based on large model analysis; the first intelligent control sequential control command... The first unit is connected to the OUT1 terminal of the combined cycle unit's intelligent sequential control function module based on large model analysis via the third pulse unit; the second intelligent sequential control instruction unit is connected to the OUT2 terminal of the combined cycle unit's intelligent sequential control function module based on large model analysis via the fourth pulse unit; the third intelligent sequential control instruction unit is connected to the OUT3 terminal of the combined cycle unit's intelligent sequential control function module based on large model analysis via the fifth pulse unit; and the fourth intelligent sequential control instruction unit is connected to the OUT4 terminal of the combined cycle unit's intelligent sequential control function module based on large model analysis via the sixth pulse unit.

[0010] Furthermore, it also includes a fully intelligent control sequence control unit, which is connected to the Step end of the fully intelligent control sequence control function module of the combined cycle unit based on large model analysis.

[0011] Furthermore, it also includes a fully intelligent control sequence control time unit, which is connected to the TRst terminal of the fully intelligent control sequence control function module of the combined cycle unit based on large model analysis.

[0012] Furthermore, it also includes a fully intelligent control sequential operation unit, which is connected to the RUN terminal of the combined cycle unit's fully intelligent control sequential step control function module based on large model analysis.

[0013] Furthermore, it also includes a fully intelligent control sequential start-up permission module, which is connected to the EN terminal of the fully intelligent control sequential control step sequence control function module of the combined cycle unit based on large model analysis.

[0014] Furthermore, it also includes a first manual module, which is connected to the MA terminal of the combined cycle unit's intelligent control sequence control function module based on large model analysis.

[0015] Furthermore, it also includes a fully intelligent control sequential start unit, which is connected to the input terminal of the first delay unit and the input terminal of the second pulse unit, respectively, and the output terminal of the first delay unit is connected to the input terminal of the first pulse unit.

[0016] Furthermore, the output of the first pulse unit is connected to the Start terminal of the combined cycle unit intelligent control sequence control function module based on large model analysis.

[0017] Furthermore, the output of the second pulse unit is connected to the Rst terminal of the combined cycle unit intelligent control sequence control function module based on large model analysis.

[0018] This invention discloses a fully intelligent control method for combined cycle power units based on large model analysis, and a fully intelligent control system for combined cycle power units based on large model analysis, comprising the following steps: 1) The first full-process intelligent control sequential control instruction unit includes the following steps in sequence: putting into the demineralized water system including the start-up of the main pump, putting into the closed water system including the water injection and pump start-up steps, putting into the circulating water system and having the functions of water injection into adjacent units, water injection into the circulating pump after shutdown, full water start-up, including switching the circulating water, switching the current pump to the main pump and water injection and pump start-up steps, putting into the function of checking the compressed air and displaying the status, and meeting the requirement that the pressure > 0.6MPa is normal, putting into the EH oil system and the functions of the steam engine lubricating oil, jacking oil and gas turbine lubricating oil system, putting into the steam engine turning gear and meeting the function of displaying the running status of the turning gear motor and putting into the gas turbine sealing oil system, putting into the gas turbine turning gear and meeting the function of displaying the status, putting into the auxiliary steam system and condensate system, shaft seal system, and vacuum system; 2) The first intelligent control sequential control instruction feedback unit completes the judgment criteria including: closed water and circulating water are running normally, steam turbine lubricating oil is normal, condensate is normal, and the status is judged according to the auxiliary steam source; 3) The second full-process intelligent control sequential control instruction unit includes: activating the low-pressure steam drum water supply system, activating the TCA system, activating the medium-pressure steam drum water supply system, and activating the high-pressure steam drum water supply system; 4) The criteria for the completion of the second full-process intelligent control sequential control command feedback unit include: normal water levels in the high, medium, and low steam drums, completion of sequential control feedback for water supply in the high, medium, and low steam drums, and completion of sequential control of the TCA system; 5) The third fully intelligent control sequential control command unit includes, in sequence: activating the closed-loop water system of the pressure regulating station. The system starts up, the gas turbine control oil system is activated, the gas turbine sequential start is activated, the FGH system is activated, the high, medium and low bypass automatic start is activated and its temperature and pressure rise functions are met, the auxiliary steam function is activated, the shaft seal function is activated, the vacuum function is activated, the gas turbine grid connection programmable manual confirmation is activated, the natural gas booster is activated, the cooling tower fan is activated, the denitrification sequential automatic start is activated, the low-cost recirculation pump and the steam temperature and water level are set to automatic, and the gas turbine load is automatically increased to the target value. 6) The criteria for the completion of the third full-process intelligent control sequential control command feedback unit include: the gas turbine power reaching different target values ​​in cold, warm, and hot states; 7) The fourth full-process intelligent control sequential control instruction unit includes the following in sequence: starting the EH oil pump, manually confirming the start of the steam turbine sequential control, manually confirming the grid connection of the steam turbine, starting the denitrification system, increasing the gas turbine load to 150MW after bypass closure, starting the supplementary steam and starting the unit CCS function, switching the auxiliary steam source, and increasing the unit load to 274MW and manually confirming the start of AGC. 8) The criteria for the completion of the fourth full-process intelligent control sequential control command feedback unit include: both steam turbine and gas turbine are connected to the grid and the total load of the unit is >270MW.

[0019] The present invention has the following beneficial effects: In practical operation, the intelligent control system and method for combined cycle power units based on large-scale model analysis described in this invention controls the sequence of intelligent control steps for the combined cycle power unit through the intelligent control sequence control function module based on large-scale model analysis. The large-scale model collects core data such as metal temperature, expansion difference, vibration, and thermal stress in real time. Combined with historical start-up and shutdown cases and equipment health status, it dynamically matches cold / hot / temperature-state start-up curves and adaptively adjusts the start-up rate, warm-up time, and load ramp-up slope. The threshold boundaries of key indicators such as thermal stress and expansion difference are calculated through a mechanistic model to verify the control strategy output by the large-scale model, preventing equipment from operating under excessive temperature or stress. This achieves coordinated start-up and shutdown of the gas turbine, steam turbine, and waste heat boiler, with the auxiliary network system automatically engaging and disengaging according to the main unit's operating conditions. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a system diagram of the present invention; Figure 2 This is a rendering of the invention. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0024] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0025] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this invention generally indicates that the preceding and following objects have an "or" relationship.

[0026] It should be understood that although terms such as first, second, third, etc., may be used in the embodiments of the present invention to describe the preset range, these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from one another. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0027] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0030] Example 1 refer to Figure 1 The intelligent control system for combined cycle power units based on large-scale model analysis described in this invention includes a fully intelligent control sequential control function module 001, an intelligent control sequential start-up unit 002, a first delay unit 003, a second pulse unit 004, a first pulse unit 005, a first intelligent control sequential command feedback unit 006, a second intelligent control sequential command feedback unit 007, a third intelligent control sequential command feedback unit 008, and a fourth intelligent control sequential command feedback unit 009. The system includes: a full-process intelligent control sequential start-up permission module 010, a full-process intelligent control sequential step sequence unit 011, a full-process intelligent control sequential step sequence remaining time unit 012, a full-process intelligent control sequential operation unit 013, a third pulse unit 014, a first full-process intelligent control sequential command unit 015, a fourth pulse unit 016, a second full-process intelligent control sequential command unit 017, a fifth pulse unit 018, a third full-process intelligent control sequential command unit 019, a sixth pulse unit 020, a fourth full-process intelligent control sequential command unit 021, and a first manual module 022. The fully intelligent control sequential start unit 002 is connected to the input terminals of the first delay unit 003 and the second pulse unit 004, respectively. The output terminal of the first delay unit 003 is connected to the input terminal of the first pulse unit 005, and the output terminal of the first pulse unit 005 is connected to the Start terminal of the fully intelligent control sequential step control function module 001 for combined cycle units based on large model analysis. The output terminal of the second pulse unit 004 is connected to the Rst terminal of the fully intelligent control sequential step control function module 001 for combined cycle units based on large model analysis. The first fully intelligent control sequential command feedback unit 006 is connected to the FB1 terminal of the fully intelligent control sequential step control function module 001 for combined cycle units based on large model analysis. The second intelligent control sequential control command feedback unit 007 is connected to the FB2 terminal of the combined cycle unit intelligent control sequential control step sequence control function module (001) based on large model analysis; the third intelligent control sequential control command feedback unit 008 is connected to the FB3 terminal of the combined cycle unit intelligent control sequential control step sequence control function module (001) based on large model analysis; the fourth intelligent control sequential control command feedback unit 009 is connected to the FB4 terminal of the combined cycle unit intelligent control sequential control step sequence control function module (001) based on large model analysis; the intelligent control sequential control start-up permission module 010 is connected to the EN terminal of the combined cycle unit intelligent control sequential control step sequence control function module (001) based on large model analysis; the intelligent control sequential control... The step sequence unit 011 is connected to the Step terminal of the combined cycle unit intelligent control sequence control function module 001 based on large model analysis; the remaining time unit 012 is connected to the TRst terminal of the combined cycle unit intelligent control sequence control function module 001 based on large model analysis; the running unit 013 is connected to the RUN terminal of the combined cycle unit intelligent control sequence control function module 001 based on large model analysis; the first intelligent control sequence control command unit 015 is connected to the OUT1 terminal of the combined cycle unit intelligent control sequence control function module 001 based on large model analysis via the third pulse unit 014; the second intelligent control sequence control... The instruction unit 017 is connected to the OUT2 terminal of the combined cycle unit intelligent control sequence control function module 001 based on large model analysis via the fourth pulse unit 016; the third intelligent control sequence control instruction unit 019 is connected to the OUT3 terminal of the combined cycle unit intelligent control sequence control function module 001 based on large model analysis via the fifth pulse unit 018; the fourth intelligent control sequence control instruction unit 021 is connected to the OUT4 terminal of the combined cycle unit intelligent control sequence control function module 001 based on large model analysis via the sixth pulse unit 020; and the first manual module 022 is connected to the MA terminal of the combined cycle unit intelligent control sequence control function module 001 based on large model analysis.

[0031] Example 2 The intelligent control method for combined cycle power units based on large model analysis described in this invention includes the following steps: 1) When the output of the full-process intelligent control sequential start-up allow module 010 is 1, it means that the full-process intelligent control sequential step control function module 001 based on large model analysis of the combined cycle unit can be used; otherwise, it means that the full-process intelligent control sequential step control function module 001 based on large model analysis of the combined cycle unit cannot be put into use.

[0032] 2) When the output of the first manual module 022 is 1, it means that the combined cycle unit full-process intelligent control sequential control function module 001 based on large model analysis can be used manually; otherwise, it means that the combined cycle unit full-process intelligent control sequential control function module 001 based on large model analysis is used for automatic control.

[0033] 3) The full-process intelligent control sequential control step unit 011 indicates which step the combined cycle unit full-process intelligent control sequential control function module 001 based on large model analysis is currently in, so that on-site operators can see the current status of the combined cycle unit full-process intelligent control sequential control function module (001) based on large model analysis.

[0034] 4) The remaining time unit 012 of the full-process intelligent control sequential control step sequence control function module 001 of the combined cycle unit based on large model analysis is in the current execution step sequence. It is used by on-site operators to view the actual time of the full-process intelligent control sequential control step sequence control function module 001 of the combined cycle unit based on large model analysis.

[0035] 5) When the output of the full-process intelligent control sequential control operation unit 013 is 1, it means that the full-process intelligent control sequential control step control function module 001 based on the large model analysis of the combined cycle unit is in use. Otherwise, it means that the full-process intelligent control sequential control step control function module 001 based on the large model analysis of the combined cycle unit is not in use.

[0036] 6) When the output of the fully intelligent control sequential start unit 002 is 1 and the delay time set inside the first delay unit 003 is met, the fully intelligent control sequential step control function module 001 of the combined cycle unit based on the large model analysis starts to work; when the output of the fully intelligent control sequential start unit 002 is 1 and the delay time set inside the first delay unit 003 is not met, all states of the fully intelligent control sequential step control function module 001 of the combined cycle unit based on the large model analysis are reset.

[0037] 7) When the combined cycle unit's full-process intelligent control sequential control function module 001 based on large model analysis starts working, the first full-process intelligent control sequential control instruction unit 015 is 1, triggering the first step of the work content. After completion, the first full-process intelligent control sequential control instruction feedback unit 006 is 1; the second full-process intelligent control sequential control instruction unit 017 is 1, triggering the second step of the work content. After completion, the second full-process intelligent control sequential control instruction feedback unit 007 is 1; the third full-process intelligent control sequential control instruction unit 019 is 1, triggering the third step of the work content. After completion, the third full-process intelligent control sequential control instruction feedback unit 008 is 1; the fourth full-process intelligent control sequential control instruction unit 021 is 1, triggering the fourth step of the work content. After completion, the fourth full-process intelligent control sequential control instruction feedback unit 009 is 1.

[0038] 8) The first full-process intelligent control sequential control instruction unit 015 includes the following steps in sequence: activating the demineralized water system (including the start-up of the main pump), activating the closed-loop water system (including the water injection and pump start-up steps), activating the circulating water system (including adjacent unit water injection, shutdown of the circulating pump for water injection, full water start-up, including switching the circulating water, switching the current pump to the main pump, and water injection and pump start-up steps), activating the compressed air check function (only displaying the status and ensuring pressure > 0.6MPa is normal), activating the EH oil system (including the functions of the steam turbine lubricating oil, jacking oil, and gas turbine lubricating oil system), activating the steam turbine turning gear (including displaying the turning gear motor's operating status and activating the gas turbine sealing oil system), activating the gas turbine turning gear (including displaying the status), activating the auxiliary steam system and condensate system, activating the shaft seal system, and activating the vacuum system.

[0039] 9) The first full-process intelligent control sequential control instruction feedback unit 006 completes the judgment criteria including: closed water and circulating water are running normally, steam turbine lubricating oil is normal, condensate is normal, and the status is judged according to the auxiliary steam source.

[0040] 10) The second full-process intelligent control sequential control instruction unit 017 includes the following in sequence: activating the low-pressure steam drum water supply system, activating the TCA system, activating the medium-pressure steam drum water supply system, and activating the high-pressure steam drum water supply system.

[0041] 11) The second full-process intelligent control sequential control command feedback unit 007 completes the following criteria: the water levels of the high, medium and low steam drums are normal, the sequential control of water supply to the high, medium and low steam drums is completed, and the sequential control of the TCA system is completed.

[0042] 12) The third fully intelligent control sequential control instruction unit 019 includes, in sequence: activating the closed-loop water system of the pressure regulating station. The system starts up, the gas turbine control oil system is activated, the gas turbine sequential start is activated, the FGH system is activated, the high, medium and low bypass automatic start is activated and its temperature and pressure rise functions are met, the auxiliary steam function is activated, the shaft seal function is activated, the vacuum function is activated, the gas turbine grid connection programmable manual confirmation is activated, the natural gas booster is activated, the cooling tower fan is activated, the denitrification sequential automatic start is activated, the low-cost recirculation pump and the steam temperature and water level are set to automatic, and the gas turbine load is automatically increased to the target value.

[0043] 13) The third full-process intelligent control sequential control command feedback unit 008 completes the judgment criteria including: the gas turbine power reaches different target values ​​in cold, warm and hot states.

[0044] 14) The fourth full-process intelligent control sequential control instruction unit 021 includes the following in sequence: starting the EH oil pump, manually confirming the start of the turbine sequential control, manually confirming the turbine grid connection program control, starting the denitrification system, increasing the gas turbine load to 150MW after bypass closure, starting the supplementary steam and starting the unit CCS function, switching the auxiliary steam source, and increasing the unit load to 274MW and manually confirming the start of AGC.

[0045] 15) The fourth full-process intelligent control sequential control command feedback unit 009 completes the judgment criteria including: both steam turbine and gas turbine are connected to the grid and the total load of the unit is >270MW.

[0046] Example 3 refer to Figure 2 This invention is applied to a gas-steam combined cycle unit in a certain plant. When the main steam pressure before the turbine suddenly rises or approaches the bypass pressure setting, the bypass control system will activate to assist the turbine in controlling the main steam pressure. If the bypass control system is activated, the steam flow into the turbine will decrease, disrupting the power balance between the gas turbine and the turbine, leading to energy waste. According to the secondary general strategy, the gas-steam combined cycle will shut down, and consequently, the AGC control will also be disengaged, ensuring the safe and stable operation of the unit.

[0047] It should be noted that the intelligent control technology for combined cycle units based on large-scale model analysis in this invention can effectively solve the problems existing in traditional control methods. Through global modeling, dynamic response optimization, and multi-objective collaborative control, the system can achieve efficient, stable, and safe operation under complex conditions. This technology not only improves the start-up and shutdown efficiency of the unit but also significantly reduces energy consumption and emissions, representing an important development direction for the intelligent upgrading of combined cycle units in the future. With the continuous advancement of artificial intelligence technology, large-scale models will play an even more important role in the control of combined cycle units.

[0048] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and disclosure of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention 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 the invention are indicated by the following claims.

[0049] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0050] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A fully intelligent control system for a combined cycle power unit based on large-scale model analysis, characterized in that, It includes a first full-process intelligent control sequential control command feedback unit (006), a second full-process intelligent control sequential control command feedback unit (007), a third full-process intelligent control sequential control command feedback unit (008), a fourth full-process intelligent control sequential control command feedback unit (009), a first full-process intelligent control sequential control command unit (015), a second full-process intelligent control sequential control command unit (017), a third full-process intelligent control sequential control command unit (019), and a fourth full-process intelligent control sequential control command unit (021); The first intelligent control sequential control command feedback unit (006) is connected to the FB1 terminal of the combined cycle unit intelligent control sequential control step sequence control function module (001) based on large model analysis; the second intelligent control sequential control command feedback unit (007) is connected to the FB2 terminal of the combined cycle unit intelligent control sequential control step sequence control function module (001) based on large model analysis; the third intelligent control sequential control command feedback unit (008) is connected to the FB3 terminal of the combined cycle unit intelligent control sequential control step sequence control function module (001) based on large model analysis; the fourth intelligent control sequential control command feedback unit (009) is connected to the FB4 terminal of the combined cycle unit intelligent control sequential control step sequence control function module (001) based on large model analysis; the first intelligent control sequential control command unit (015) is connected to the third intelligent control sequential control step sequence control function module (001) via the third intelligent control sequential control command feedback unit (006). The pulse unit (014) is connected to the OUT1 terminal of the combined cycle unit intelligent control sequence control function module (001) based on large model analysis; the second intelligent control sequence control instruction unit (017) is connected to the OUT2 terminal of the combined cycle unit intelligent control sequence control function module (001) based on large model analysis via the fourth pulse unit (016); the third intelligent control sequence control instruction unit (019) is connected to the OUT3 terminal of the combined cycle unit intelligent control sequence control function module (001) based on large model analysis via the fifth pulse unit (018); and the fourth intelligent control sequence control instruction unit (021) is connected to the OUT4 terminal of the combined cycle unit intelligent control sequence control function module (001) based on large model analysis via the sixth pulse unit (020).

2. The intelligent control system for combined cycle power units based on large-scale model analysis according to claim 1, characterized in that, It also includes a fully intelligent control sequential control step unit (011), which is connected to the Step end of the fully intelligent control sequential control step control function module (001) of the combined cycle unit based on large model analysis.

3. The intelligent control system for combined cycle power units based on large-scale model analysis according to claim 1, characterized in that, It also includes a full-process intelligent control sequential control step remaining time unit (012), which is connected to the TRst terminal of the combined cycle unit full-process intelligent control sequential control step control function module (001) based on large model analysis.

4. The intelligent control system for combined cycle power units based on large-scale model analysis according to claim 1, characterized in that, It also includes a fully intelligent control sequential operation unit (013), which is connected to the RUN terminal of the fully intelligent control sequential control step control function module (001) of the combined cycle unit based on large model analysis.

5. The intelligent control system for combined cycle power units based on large-scale model analysis according to claim 1, characterized in that, It also includes a fully intelligent control sequential start-up permission module (010), which is connected to the EN terminal of the fully intelligent control sequential step control function module (001) of the combined cycle unit based on large model analysis.

6. The intelligent control system for combined cycle power units based on large-scale model analysis according to claim 1, characterized in that, It also includes a first manual module (022), which is connected to the MA terminal of the combined cycle unit intelligent control sequence control function module (001) based on large model analysis.

7. The intelligent control system for combined cycle power units based on large-scale model analysis according to claim 1, characterized in that, It also includes a fully intelligent control sequential start unit (002), which is connected to the input terminal of the first delay unit (003) and the input terminal of the second pulse unit (004), respectively. The output terminal of the first delay unit (003) is connected to the input terminal of the first pulse unit (005).

8. The intelligent control system for combined cycle power units based on large-scale model analysis according to claim 7, characterized in that, The output of the first pulse unit (005) is connected to the Start terminal of the combined cycle unit intelligent control sequence control function module (001) based on large model analysis.

9. The intelligent control system for combined cycle power units based on large-scale model analysis according to claim 7, characterized in that, The output of the second pulse unit (004) is connected to the Rst terminal of the combined cycle unit intelligent control sequence control function module (001) based on large model analysis.

10. A method for intelligent control of a combined cycle power unit based on large model analysis, characterized in that, The intelligent control system for combined cycle power units based on large model analysis as described in claim 1 includes the following steps: 1) The first full-process intelligent control sequential control instruction unit (015) includes the following steps in sequence: putting into the demineralized water system including the start-up of the large pump, putting into the closed water system including the water injection and pump start-up steps, putting into the circulating water system and having the functions of water injection of adjacent units, water injection of the circulating pump when the unit is stopped, full water start-up, including switching the circulating water, switching the current pump to the large pump and water injection and pump start-up steps, putting into the function of checking the compressed air and displaying the status and meeting the requirement that the pressure > 0.6MPa is normal, putting into the EH oil system and the functions of the steam engine lubricating oil and jacking oil and the gas turbine lubricating oil system, putting into the steam engine turning gear and meeting the display of the turning gear motor running status and putting into the gas turbine sealing oil system, putting into the gas turbine turning gear and meeting the status display, putting into the auxiliary steam system and condensate system, shaft seal system, and vacuum system; 2) The first intelligent control sequential control instruction feedback unit (006) completes the judgment criteria including: closed water and circulating water are running normally, steam engine lubricating oil is normal, condensate is normal, and the status is judged according to the auxiliary steam source; 3) The second full-process intelligent control sequential control instruction unit (017) includes, in sequence: activating the low-pressure steam drum water supply system, activating the TCA system, activating the medium-pressure steam drum water supply system, and activating the high-pressure steam drum water supply system; 4) The criteria for the completion of the second full-process intelligent control sequential control command feedback unit (007) include: the water levels of the high, medium and low steam drums are normal, the sequential control of water supply to the high, medium and low steam drums is completed, and the sequential control of the TCA system is completed; 5) The third fully intelligent control sequential control instruction unit (019) includes, in sequence: putting the closed-loop water system of the pressure regulating station into operation. The system starts up, the gas turbine control oil system is activated, the gas turbine sequential start is activated, the FGH system is activated, the high, medium and low bypass automatic start is activated and its temperature and pressure rise functions are met, the auxiliary steam function is activated, the shaft seal function is activated, the vacuum function is activated, the gas turbine grid connection programmable manual confirmation is activated, the natural gas booster is activated, the cooling tower fan is activated, the denitrification sequential automatic start is activated, the low-cost recirculation pump and the steam temperature and water level are set to automatic, and the gas turbine load is automatically increased to the target value. 6) The third full-process intelligent control sequential control command feedback unit (008) completes the judgment criteria including: the gas turbine power reaches different target values ​​in cold, warm and hot states; 7) The fourth full-process intelligent control sequential control instruction unit (021) includes the following in sequence: starting the EH oil pump, manually confirming the start of the steam turbine sequential control, manually confirming the grid connection of the steam turbine, starting the denitrification system, increasing the gas turbine load to 150MW after bypass closure, starting the supplementary steam and starting the unit CCS function, switching the auxiliary steam source, and increasing the unit load to 274MW and manually confirming the start of AGC. 8) The criteria for the completion of the fourth full-process intelligent control sequential control instruction feedback unit (009) include: both steam turbine and gas turbine are connected to the grid and the total load of the unit is >270MW.

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