Gas turbine unit whole cycle operation fault tripping analysis control method and system

Abstract

This invention discloses a method and system for tripping analysis and control during the entire lifecycle of a gas turbine unit, belonging to the field of intelligent control of gas turbine units. It includes a first OR module, a first greater than comparison module, a first less than comparison module, a first AND module, a second AND module, a first SR trigger module, a second SR trigger module, and a second OR module. The main functions of this invention include: trend prediction and early hazard identification based on multi-source data fusion; standardized and intelligent tripping timing inversion and root cause reasoning mechanisms; and comprehensive support for full-cycle optimization decision-making, encompassing operation, protection, maintenance, and equipment lifecycle data analysis.

Description

Technical Field

[0001] This invention belongs to the field of intelligent control of gas turbine units, and relates to a method and system for analyzing and controlling fault tripping during the entire operation cycle of a gas turbine unit. Background Technology

[0002] Gas turbine generator sets, with their advantages of being clean and efficient, having rapid start-up and shutdown capabilities, and strong peak-shaving capacity, have become the main peak-shaving power source and an important supporting power source for the power grid, playing an irreplaceable role in ensuring the safety and stability of the power grid, mitigating fluctuations in new energy sources, and improving the reliability of power supply. However, as deep peak shaving, frequent start-up and shutdown, and rapid load changes become the norm for gas turbine generator sets, the operating conditions of these units are becoming increasingly complex and variable. The coupling relationships between the combustion system, thermal control system, mechanical transmission, electrical protection, and auxiliary systems have significantly increased. Unit fault trips are characterized by multiple causes, long fault chains, suddenness, and severe consequences: after a trip, data is scattered, timing is unclear, and information silos exist between multiple systems, leading to slow root cause identification, delayed response, and recurring similar faults.

[0003] Against this backdrop, there is an urgent need to build a gas turbine unit fault trip analysis and intelligent control system that covers pre-event early warning, rapid in-event response, post-event root cause analysis, and full-cycle iterative optimization. Through technologies such as multi-source data fusion, intelligent diagnosis, edge collaborative control, and digital twins, the system can transform from "passive emergency repair" to "proactive early warning, intelligent prevention and control, and full-cycle management," thereby comprehensively improving the safety, reliability, and economy of gas turbine unit operation. Summary of the Invention

[0004] To address the problems of scattered data, unclear timing, and information silos among multiple systems after tripping in existing technologies, which lead to slow root cause location, delayed handling, and recurrence of similar faults, the purpose of this invention is to design a fault tripping analysis and control method and system for the entire life cycle of gas turbine units. The main functions include: trend prediction and early hidden danger identification based on multi-source data fusion, and standardized and intelligent tripping timing inversion and root cause reasoning mechanisms to meet the needs of data analysis throughout the entire life cycle of operation, protection, maintenance, and equipment, and to comprehensively support full-cycle optimization decision-making.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The gas turbine unit full-cycle operation fault trip analysis and control system includes a first OR module, a first greater than comparison module, a first less than comparison module, a first AND module, a second AND module, a first SR trigger module, a second SR trigger module, and a second OR module; The output of the first greater than comparison module is connected to the first AND module. The outputs of the first OR module and the first greater than comparison module are both connected to the second AND module. The output of the first AND module is connected to the "S" terminal of the first SR trigger module. The output of the second AND module is connected to the "R" terminal of the first SR trigger module. The output of the second AND module is connected to the "S" terminal of the second SR trigger module. The output of the first less than comparison module is connected to the "R" terminal of the second SR trigger module. The outputs of the first SR trigger module and the second SR trigger module are both connected to the second OR module. The output of the second OR module is connected to the gas turbine RB function.

[0006] A further improvement of the present invention is that it also includes: the RB function is connected to the first AND module and the second AND module.

[0007] A further improvement of the present invention is that it also includes: the external RB function of the gas turbine is connected to the first module.

[0008] A further improvement of the present invention is that it further includes: the condensate pump RB is connected to the first or second module.

[0009] A further improvement of the present invention is that it further includes: the condensate pump pre-pump RB connected to the first or second module.

[0010] A further improvement of the present invention is that it also includes: the waste heat boiler high-pressure feedwater pump RB connected to the first or second module.

[0011] A further improvement of the present invention is that it also includes: the waste heat boiler medium-pressure feedwater pump RB is connected to the first or second module.

[0012] A further improvement of the present invention is that it further includes: the actual power of the gas turbine is connected to the first greater than comparison module.

[0013] A further improvement of the present invention is that it further includes: the actual power of the gas turbine is connected to the first less-than comparison module.

[0014] The method for analyzing and controlling fault tripping during the entire lifecycle of a gas turbine unit includes: If the output of the condensate pump RB is “1”, the output of the condensate pump pre-pump RB is “1”, the output of the waste heat boiler high pressure feedwater pump RB is “1”, or the output of the waste heat boiler medium pressure feedwater pump RB is “1”, then the first OR module output is “1”. After the actual power of the gas turbine is judged by the built-in constant of the first greater than comparison module, if it is greater than the comparison module, the first greater than comparison module outputs "1". After the actual power of the gas turbine is judged by the built-in constant of the first less than comparison module, if it is less than the comparison module, the first less than comparison module outputs "1". When the RB function is activated, the external RB function of the gas turbine and the output terminal of the first greater than comparison module both output "1", the first AND module outputs "1". When the RB function is enabled, and the outputs of the first OR module and the first greater than comparison module are both "1", then the output of the second AND module is "1". When the output of the first less than comparison module is "0" and the output of the first AND module is "1", the output of the first SR trigger module is "1"; when the output of the first AND module is "0", the output of the first SR trigger module is "0". When the output of the first less than comparison module is "0" and the output of the second AND module is "1", then the output of the second SR trigger module is "1"; when the output of the second AND module is "0", then the output of the second SR trigger module is "0". If the output of the first SR trigger module is "1" or the output of the second SR trigger module is "1", then the output of the second OR module is "1", and the final output of the gas turbine RB function is "1".

[0015] Compared with the prior art, the present invention has at least the following beneficial technical effects: This invention provides a full-cycle operation fault trip analysis and control system for gas turbine units. It adopts a three-level architecture of "edge-platform-application" to achieve full coverage of functions such as multi-source data acquisition, intelligent early warning, fault diagnosis, trip control, and post-mortem optimization. Specifically, it includes an edge perception layer, a platform layer, an application layer, and a communication bus. Each layer works in concert to ensure the system's real-time performance, reliability, and intelligence level.

[0016] This invention provides a fault tripping analysis and control method for the entire operation cycle of a gas turbine unit. Based on a preset fault knowledge base and inference engine, combined with real-time collected fault data, it automatically analyzes the initial cause of the fault, the fault propagation path, distinguishes between genuine faults and protection malfunctions, clarifies the fault type (mechanical fault, electrical fault, combustion fault, control fault) and the specific faulty component, and pushes the diagnostic results to the operation and maintenance terminal in real time, reducing the fault diagnosis time from hours to minutes.

[0017] In summary, the gas turbine unit full-cycle operation fault trip analysis and control method and system described in this invention constructs a gas turbine unit fault trip analysis and intelligent control system covering pre-event early warning, in-event rapid response, post-event root cause analysis, and full-cycle iterative optimization. Through multi-source data fusion, intelligent diagnosis, edge collaborative control, digital twin and other technologies, it realizes the transformation from "passive emergency repair" to "proactive early warning, intelligent prevention and control, and full-cycle management", comprehensively improving the safety, reliability and economy of gas turbine unit operation. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a fault tripping analysis and control system for the entire operation cycle of a gas turbine unit.

[0020] Figure 2 This is a rendering of an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures: 001. RB function is in operation; 002. External RB function of gas turbine; 003. Condensate pump RB; 004. Condensate pump pre-pump RB; 005. High-pressure feedwater pump of waste heat boiler RB; 006. Medium-pressure feedwater pump of waste heat boiler RB; 007. Actual power of gas turbine; 008. First OR module; 009. First greater than comparison module; 010. First less than comparison module; 011. First AND module; 012. Second AND module; 013. First SR trigger module; 014. Second SR trigger module; 015. Second OR module; 016. RB function of gas turbine. Detailed Implementation

[0022] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] It should be understood that, when used in this specification and the appended claims, 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.

[0028] 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.

[0029] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0030] 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.

[0031] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0032] Example 1 like Figure 1 The diagram shown is a schematic diagram of a gas turbine unit full-cycle operation fault tripping analysis and control system according to the present invention.

[0033] Specifically, it includes: RB function already in operation 001, external RB function of gas turbine 002, condensate pump RB003, condensate pump pre-pump RB004, high-pressure feedwater pump of waste heat boiler RB005, medium-pressure feedwater pump of waste heat boiler RB006, actual power of gas turbine 007, first OR module 008, first greater than comparison module 009, first less than comparison module 010, first AND module 011, second AND module 012, first SR trigger module 013, second SR trigger module 014, second OR module 015, and RB function of gas turbine 016.

[0034] Figure 1 The schematic diagram includes the following parts: Condensate pump RB003, condensate pump booster RB004, waste heat boiler high-pressure feedwater pump RB005, and waste heat boiler medium-pressure feedwater pump RB006 are all connected to the first OR module 008. The actual power of the gas turbine 007 is connected to the first greater than comparison module 009 and the first less than comparison module 010, respectively. The output terminals of RB function enabled 001, external RB function of the gas turbine 002, and the first greater than comparison module 009 are all connected to the first AND module 011. The output terminals of RB function enabled 001, the first OR module 008, and the first greater than comparison module 009 are all connected to the second AND module 012. The output of module 011 is connected to the "S" terminal of the first SR trigger module 013, the output of the second AND module 012 is connected to the "R" terminal of the first SR trigger module 013, the output of the second AND module 012 is connected to the "S" terminal of the second SR trigger module 014, the output of the first less than comparison module 010 is connected to the "R" terminal of the second SR trigger module 014, the outputs of the first SR trigger module 013 and the second SR trigger module 014 are both connected to the second OR module 015, and the output of the second OR module 015 is connected to the gas turbine RB function 016.

[0035] This invention needs to be divided into the following steps: If the output of condensate pump RB003 is "1", the output of condensate pump pre-pump RB004 is "1", the output of waste heat boiler high-pressure feedwater pump RB005 is "1" or the output of waste heat boiler medium-pressure feedwater pump RB006 is "1", then the first OR module 008 outputs "1".

[0036] After the actual power of the gas turbine 007 is judged by the built-in constant of the first greater than comparison module 009, if it is greater than the comparison module 009 outputs "1". After the actual power of the gas turbine 007 is judged by the built-in constant of the first less than comparison module 010, if it is less than the comparison module 010 outputs "1". When the RB function is activated 001, the external RB function of the gas turbine 002 and the output terminal of the first greater than comparison module 009 are all "1", then the first AND module 011 outputs "1".

[0037] When the RB function is enabled (001), the output of the first OR module (008) and the output of the first greater than comparison module (009) are both "1", then the output of the second AND module (012) is "1".

[0038] When the output of the first less than comparison module 010 is “0” and the output of the first AND module 011 is “1”, the output of the first SR trigger module 013 is “1”; when the output of the first AND module 011 is “0”, the output of the first SR trigger module 013 is “0”.

[0039] When the output of the first less than comparison module 010 is “0” and the output of the second AND module 012 is “1”, the output of the second SR trigger module 014 is “1”; when the output of the second AND module 012 is “0”, the output of the second SR trigger module 014 is “0”.

[0040] If the output of the first SR trigger module 013 is "1" or the output of the second SR trigger module 014 is "1", then the output of the second OR module 015 is "1", and finally the output of the gas turbine RB function 016 is "1".

[0041] Example 2 like Figure 2 As shown, the implementation and application of the technology of this invention in the unit operation control process presents the change process of equipment health over time and the operation and maintenance mode. The vertical axis represents equipment health, and the horizontal axis represents time. In the initial stage, the equipment health is maintained at a high level, and the operating status is stable and reliable; as time goes by, the health begins to decline continuously, and the rate of deterioration gradually accelerates; when the health drops to a critical threshold, a tripping fault is triggered, and the equipment is forced to shut down. After the fault occurs, it needs to be solved by the key technology of this invention. This mode can detect equipment deterioration in advance, solving the problem of unplanned downtime losses and increased operation and maintenance costs.

[0042] Example 3 In this embodiment, all modules of the control system are integrated into the gas turbine DCS control system. The communication bus adopts industrial Ethernet with a data transmission rate of 100Mbps, which meets the real-time control requirements. The built-in constants of each comparison module are calibrated according to the unit design and operation test. The built-in constant of the first greater than comparison module 009 is set to 300MW (the minimum stable operating power threshold for peak shaving of the unit), and the built-in constant of the first less than comparison module 010 is also set to 300MW. The response time of each logic module (OR, AND, SR trigger) is ≤10ms, which meets the timing requirements for rapid triggering of the gas turbine RB function.

[0043] All input signals of the system are taken from the on-site detection components and auxiliary control system of the unit. Among them, the condensate pump RB003, condensate pump booster pump RB004, waste heat boiler high-pressure feedwater pump RB005, and waste heat boiler medium-pressure feedwater pump RB006 are switch signals (output "0" under normal operation, output "1" when the auxiliary machine fault triggers RB); RB function enabled 001 is a switch signal manually switched by the operator (output "1" when enabled, output "0" when disabled); external RB function of gas turbine 002 is a remote trigger signal from the grid dispatch terminal (output "0" when there is no external trigger, output "1" when the grid requires load reduction to trigger RB); actual power of gas turbine 007 is an analog signal, which participates in the logic judgment after DCS analog-to-digital conversion, with an accuracy of ±0.5MW.

[0044] In this embodiment, the operator sets the RB function 001 to "1" in advance. The initial operating conditions of the unit are: the actual power of the gas turbine is 380MW, all auxiliary machines (condensate pump, condensate pump pre-pump, waste heat boiler high and low pressure feedwater pump) are operating normally, and the grid dispatch terminal does not trigger the external RB, that is, the gas turbine external RB function 002 outputs "0".

[0045] Step 1: Auxiliary machine failure triggers the RB signal, and the output of the first OR module 008 is set to "1". During unit operation, a sudden mechanical failure occurred in the high-pressure feedwater pump of the waste heat boiler. Its control system triggered the RB protection, and the output of the high-pressure feedwater pump RB005 was changed from "0" to "1". The outputs of the condensate pump RB003, the condensate pump pre-pump RB004, and the medium-pressure feedwater pump RB006 of the waste heat boiler remained "0". According to the logic rules, when any auxiliary machine RB signal is "1", the output of the first OR module 008 is set to "1".

[0046] Step 2: Determine the actual power output of the gas turbine; set the output of the first greater than comparison module 009 to "1". The actual power of the gas turbine is 380MW in real time. It is sent to the first greater than comparison module 009 for comparison with the built-in constant 300MW. Since 380MW>300MW, the output of the first greater than comparison module 009 is set to "1". The power value is input to the first less-than comparison module 010 and compared with the built-in constant 300MW. If 380MW is not less than 300MW, the output of the first less-than comparison module 010 remains "0".

[0047] Step 3: Keep the output of module 011 at "0" The inputs to the first AND module 011 are RB function in operation (001, "1"), external RB function of gas turbine (002, "0"), and first greater than comparison module (009, "1"). According to the AND logic rule, the output is "0" when the input signal is "0", so the output of the first AND module 011 remains "0".

[0048] Step 4: Set the output of the second AND module 012 to "1" The inputs to the second AND module 012 are RB function enabled (001, "1"), the first OR module (008, "1"), and the first greater than comparison module (009, "1"). According to the AND logic rule, the output is "1" when all inputs are "1", so the output of the second AND module 012 is set to "1".

[0049] Step 5: SR trigger module logic judgment First SR trigger module 013: S-terminal input is first AND module (011, "0"), R-terminal input is second AND module (012, "1"), according to SR trigger logic and the rules of this invention, the output of first SR trigger module 013 remains "0"; Second SR trigger module 014: The output of the first less than comparison module (010) is "0", which satisfies the trigger condition. Its S-terminal input is the second AND module (012, "1"). According to the rules, the output of the second SR trigger module 014 is set to "1".

[0050] Step 6: Gas turbine RB function 016 is finally triggered The inputs of the second OR module 015 are the first SR trigger module (013, "0") and the second SR trigger module (014, "1"). According to the OR logic rule, the output is "1" when any input is "1". Therefore, the output of the second OR module 015 is set to "1". Finally, the output of the gas turbine RB function 016 is set to "1". After receiving the RB trigger signal, the gas turbine control system quickly reduces the load to below 300MW according to the preset curve to avoid the unit from being tripped due to auxiliary machine failure and to achieve rapid handling of the fault in the event.

[0051] In this embodiment, from the triggering of the RB signal by the high-pressure feedwater pump of the waste heat boiler to the formal start of the gas turbine RB function, the entire logical judgment process takes 8ms, which is far below the action threshold (50ms) of the unit's thermal protection, thus achieving rapid response to the fault and avoiding unplanned shutdowns. The control system accurately distinguished between internal RBs caused by auxiliary machine failures and external RBs triggered by grid dispatch, and completed load regulation under a single fault according to the preset logic, without any protection maloperation or failure to operate. During the fault, the system collected the timing data of all input and output signals in real time and uploaded them to the platform layer, providing complete data support for subsequent fault review, root cause analysis and equipment health assessment. According to the background analysis, the high-pressure water pump failure was caused by bearing deterioration. The maintenance personnel replaced the equipment based on the analysis results, thus preventing the recurrence of similar faults.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A fault tripping analysis and control system for the entire life cycle of a gas turbine unit, characterized in that, It includes a first OR module (008), a first greater than comparison module (009), a first less than comparison module (010), a first AND module (011), a second AND module (012), a first SR trigger module (013), a second SR trigger module (014), and a second OR module (015); The output of the first greater than comparison module (009) is connected to the first AND module (011). The outputs of the first OR module (008) and the first greater than comparison module (009) are both connected to the second AND module (012). The output of the first AND module (011) is connected to the "S" terminal of the first SR trigger module (013). The output of the second AND module (012) is connected to the "R" terminal of the first SR trigger module (013). The output of the second AND module (012) is connected to the "S" terminal of the second SR trigger module (014). The output of the first less than comparison module (010) is connected to the "R" terminal of the second SR trigger module (014). The outputs of the first SR trigger module (013) and the second SR trigger module (014) are both connected to the second OR module (015). The output of the second OR module (015) is connected to the gas turbine RB function (016).

2. The gas turbine unit full-cycle operation fault tripping analysis and control system according to claim 1, characterized in that, Also includes: The RB function has been put into operation (001) and connected to the first AND module (011) and the second AND module (012).

3. The gas turbine unit full-cycle operation fault tripping analysis and control system according to claim 2, characterized in that, Also includes: The external RB function (002) of the gas turbine is connected to the first AND module (011).

4. The gas turbine unit full-cycle operation fault tripping analysis and control system according to claim 3, characterized in that, Also includes: The condensate pump RB (003) is connected to the first or module (008).

5. The gas turbine unit full-cycle operation fault tripping analysis and control system according to claim 4, characterized in that, Also includes: The condensate pump pre-pump RB (004) is connected to the first or module (008).

6. The gas turbine unit full-cycle operation fault tripping analysis and control system according to claim 5, characterized in that, Also includes: The waste heat boiler high-pressure feedwater pump RB (005) is connected to the first or module (008).

7. The gas turbine unit full-cycle operation fault tripping analysis and control system according to claim 6, characterized in that, Also includes: The waste heat boiler medium-pressure feedwater pump RB (006) is connected to the first or module (008).

8. The gas turbine unit full-cycle operation fault tripping analysis and control system according to claim 7, characterized in that, Also includes: The actual power of the gas turbine (007) is connected to the first greater than comparison module (009).

9. The gas turbine unit full-cycle operation fault tripping analysis and control system according to claim 8, characterized in that, Also includes: The actual power of the gas turbine (007) is connected to the first less than comparison module (010).

10. A method for analyzing and controlling fault tripping during the entire operation cycle of a gas turbine unit, characterized in that, The method is based on the gas turbine unit full-cycle operation fault tripping analysis and control system as described in claim 9, comprising: If the output of the condensate pump RB (003) is "1", the output of the condensate pump pre-pump RB (004) is "1", the output of the waste heat boiler high pressure feed water pump RB (005) is "1" or the output of the waste heat boiler medium pressure feed water pump RB (006) is "1", then the first OR module (008) outputs "1"; After the actual power of the gas turbine (007) is judged by the built-in constant of the first greater than comparison module (009), if it is greater than the comparison module (009) outputs "1". After the actual power of the gas turbine (007) is judged by the built-in constant of the first less than comparison module (010), if it is less than the comparison module (010) outputs "1". When the RB function is activated (001), the external RB function of the gas turbine (002) and the output terminal of the first greater than comparison module (009) all output "1", then the first AND module (011) outputs "1". When the RB function is enabled (001), the output of the first OR module (008) and the output of the first greater than comparison module (009) are both "1", then the output of the second AND module (012) is "1". When the output of the first less than comparison module (010) is "0" and the output of the first AND module (011) is "1", then the output of the first SR trigger module (013) is "1"; when the output of the first AND module (011) is "0", then the output of the first SR trigger module (013) is "0". When the output of the first less than comparison module (010) is "0" and the output of the second AND module (012) is "1", then the output of the second SR trigger module (014) is "1"; when the output of the second AND module (012) is "0", then the output of the second SR trigger module (014) is "0". If the output of the first SR trigger module (013) is "1" or the output of the second SR trigger module (014) is "1", then the output of the second OR module (015) is "1", and the final output of the gas turbine RB function (016) is "1".

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