Protection method and system of steam turbine generator unit, electronic equipment and storage medium

Abstract

The invention relates to a protection method for a steam turbine generator unit, and the method comprises the steps: receiving protection signals transmitted by a first electric quantity protection screen, a second electric quantity protection screen and a non-electric quantity protection screen, and enabling the protection signals to be generated by the first electric quantity protection screen, the second electric quantity protection screen and the non-electric quantity protection screen based on the operation parameters of a generator in the steam turbine generator unit; and judging whether a protection action is triggered or not based on the protection signal, and under the condition that the protection action is triggered, controlling a steam turbine in the steam turbine generator unit to trip. According to the invention, the problem of low reliability of the protection signal action of the steam turbine generator unit is solved. The multiple electric quantity protection screens are combined with the non-electric quantity protection screen to send signals, so that equipment misoperation caused by mistaken sending of single-point protection signals is avoided, and the reliability of protection signal actions is improved.

Description

Technical Field

[0001] The present application relates to the field of unit control, and in particular, to a protection method, system, electronic device, and storage medium for a steam turbine generator unit. Background Art

[0002] The emergency trip system (ETS) of a steam turbine is used to monitor the relevant parameters of a steam turbine generator unit. When these parameters exceed their operating limit values, the system closes all the steam inlet valves of the steam turbine and shuts down the unit emergently.

[0003] In the related art, a generator fault or a generator protection action signal is one of the action conditions of the emergency trip system of a steam turbine. In the prior art, generally, a single-point protection signal is used to trigger the emergency trip system of a steam turbine. The single-point protection signal has low accuracy and is not representative, resulting in low safety of the steam turbine generator unit.

[0004] Currently, for the problem of low reliability of the protection signal action in the steam turbine generator unit in the related art, no effective solution has been proposed yet. Summary of the Invention

[0005] Embodiments of the present application provide a protection method, system, electronic device, and storage medium for a steam turbine generator unit, so as to at least solve the problem of low reliability of the protection signal action in the steam turbine generator unit in the related art.

[0006] In a first aspect, an embodiment of the present application provides a protection method for a steam turbine generator unit. The method is applied to an ETS device, and the method includes:

[0007] Receiving protection signals sent by a first electrical quantity protection panel, a second electrical quantity protection panel, and a non-electrical quantity protection panel, where the protection signals are generated by the first electrical quantity protection panel, the second electrical quantity protection panel, and the non-electrical quantity protection panel based on the operating parameters of a generator in the steam turbine generator unit;

[0008] Judging whether to trigger a protection action based on the protection signals;

[0009] When a protection action is triggered, controlling the steam turbine in the steam turbine generator unit to trip.

[0010] In some embodiments, the judging whether to trigger a protection action based on the protection signals includes:

[0011] When receiving a first protection signal sent by the first electrical quantity protection panel and a second protection signal sent by the second electrical quantity protection panel simultaneously, judging whether to trigger a protection action based on the first protection signal, the second protection signal, and a first preset protection condition.

[0012] In some of these embodiments, determining whether to trigger a protection action based on the first protection signal, the second protection signal, and the first preset protection condition includes:

[0013] Determining whether to trigger a protection action based on the reception times and reception times of the first protection signal and the second protection signal, and the first preset protection condition.

[0014] In some of these embodiments, the first power protection screen and the second power protection screen are set to send three protection signals to the ETS device when triggering protection, and the first preset protection condition includes: a first condition and a second condition.

[0015] The first condition is receiving at least two of the first protection signals.

[0016] The second condition is receiving at least two of the second protection signals.

[0017] If the first condition and / or the second condition is satisfied, a protection action is triggered.

[0018] In some of these embodiments, the first power protection screen and the second power protection screen are set to send three protection signals to the ETS device when triggering protection, and the first preset protection condition includes: a third condition, a fourth condition, and a fifth condition.

[0019] The third condition is receiving the first of the first protection signals or the first of the second protection signals.

[0020] The fourth condition is receiving the second of the first protection signals or the second of the second protection signals.

[0021] The fifth condition is receiving the third of the first protection signals or the third of the second protection signals.

[0022] If at least two of the third condition, the fourth condition, and the fifth condition are simultaneously satisfied, a protection action is triggered.

[0023] In some of these embodiments, determining whether to trigger a protection action based on the protection signal includes:

[0024] When receiving the third protection signal sent by the non - electrical quantity protection screen, determining whether to trigger a protection action based on the third protection signal and the second preset protection condition.

[0025] In some of these embodiments, in the case where the non - electrical quantity protection screen is set to send three third protection signals to the ETS device when triggering protection, the second preset protection condition includes: if at least two of the third protection signals are simultaneously received, a protection action is triggered.

[0026] In a second aspect, an embodiment of the present application provides a protection system for a steam turbine generator set, and the system includes:

[0027] A signal receiving module, configured to receive protection signals sent by a first electric quantity protection screen, a second electric quantity protection screen, and a non-electric quantity protection screen, where the protection signals are generated by the first electric quantity protection screen, the second electric quantity protection screen, and the non-electric quantity protection screen based on the operating parameters of the generator in the steam turbine generator set;

[0028] A judgment module, configured to judge whether to trigger a protection action based on the protection signals;

[0029] A control module, configured to control the steam turbine in the steam turbine generator set to trip in case of triggering a protection action.

[0030] In a third aspect, an embodiment of the present application provides a computer device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the protection method for the steam turbine generator set as described in the first aspect above is implemented.

[0031] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the protection method for the steam turbine generator set as described in the first aspect above is implemented.

[0032] Compared with the related art, the protection method for the steam turbine generator set provided by the embodiment of the present application receives protection signals sent by a first electric quantity protection screen, a second electric quantity protection screen, and a non-electric quantity protection screen, where the protection signals are generated by the first electric quantity protection screen, the second electric quantity protection screen, and the non-electric quantity protection screen based on the operating parameters of the generator in the steam turbine generator set; judges whether to trigger a protection action based on the protection signals, and controls the steam turbine in the steam turbine generator set to trip in case of triggering a protection action, solving the problem of low reliability of the protection signal action of the steam turbine generator set. By combining multiple electric quantity protection screens with a non-electric quantity protection screen to send signals, the misoperation of equipment caused by the mistransmission of single-point protection signals is avoided, and the reliability of the protection signal action is improved. Description of the Drawings

[0033] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation to the present application. In the drawings:

[0034] Figure 1 is a schematic diagram of the application environment of the protection method for the steam turbine generator set according to the embodiment of the present application;

[0035] Figure 2It is a flowchart of a protection method for a steam turbine generator set according to an embodiment of the present application;

[0036] Figure 3 It is a schematic diagram for judging protection trigger according to an embodiment of the present application;

[0037] Figure 4 It is a schematic diagram for judging protection trigger according to Scheme 1 of an embodiment of the present application;

[0038] Figure 5 It is a schematic diagram for judging protection trigger according to Scheme 2 of an embodiment of the present application;

[0039] Figure 6 It is a structural block diagram of a protection system for a steam turbine generator set according to an embodiment of the present application;

[0040] Figure 7 It is an internal structural schematic diagram of an electronic device according to an embodiment of the present application. Detailed implementation manners

[0041] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be described and explained below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided in the present application without creative efforts fall within the scope of protection of the present application.

[0042] Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, the present application can also be applied to other similar scenarios based on these drawings. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacturing or production changes based on the technical content disclosed in the present application are only conventional technical means and should not be understood as the content disclosed in the present application being insufficient.

[0043] Referring to "embodiment" in the present application means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those of ordinary skill in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments without conflict.

[0044] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the ordinary meanings understood by those with ordinary skills in the technical field to which this application belongs. The words such as "a", "an", "one kind", "the" and the like involved in this application do not indicate a quantity limitation and can represent a singular or plural number. The terms "include", "comprise", "have" and any variations thereof involved in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may further include steps or units not listed, or may further include other steps or units inherent to these processes, methods, products or devices. The similar words such as "connect", "be connected", "couple" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, "A and / or B" can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. The terms "first", "second", "third" and the like involved in this application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0045] The protection method for a steam turbine generator set provided by the present invention can be applicable to Figure 1 the schematic diagram of the application environment shown. As Figure 1 shown, the ETS device 14 is respectively communicatively connected to the first electric quantity protection screen 11, the second electric quantity protection screen 12 and the non-electric quantity protection screen 13. The ETS device 14 receives the protection signals sent by the first electric quantity protection screen 11, the second electric quantity protection screen 12 and the non-electric quantity protection screen 13, judges whether to trigger a protection action based on the protection signals, and controls the steam turbine to trip in the case of triggering a protection action.

[0046] This embodiment provides a protection method for a steam turbine generator set, and this method is applied to the ETS device. Figure 2 is a flowchart of the protection method for a steam turbine generator set according to an embodiment of the present application. As Figure 2 shown, this process includes the following steps:

[0047] Step S201, receive the protection signals sent by the first electric quantity protection screen, the second electric quantity protection screen and the non-electric quantity protection screen, and the protection signals are generated by the first electric quantity protection screen, the second electric quantity protection screen and the non-electric quantity protection screen based on the operating parameters of the generator in the steam turbine generator set.

[0048] In this embodiment, the generator protection screen includes an electric quantity protection screen and a non-electric quantity protection screen.

[0049] The first and second power protection screens mainly operate or send signals for protection based on faults reflected by current and voltage, and then combine corresponding auxiliary contacts to respond to various faults, including but not limited to pilot differential protection, transverse differential protection, single-phase ground protection, excitation circuit ground protection, under-excitation, loss-of-excitation protection, overload protection, stator winding overcurrent protection, and reverse power protection.

[0050] The non-electrical quantity protection screen operates or sends signals for protection based on faults reflected by non-electrical quantities. The non-electrical quantity protection reflects internal faults of the transformer. Generally, it means that the criterion for protection is not an electrical quantity (such as current, voltage, frequency, impedance, etc.), but a non-electrical quantity, including but not limited to gas protection (set by oil velocity), temperature protection (set by temperature), explosion protection (pressure), fire protection (through fire detectors, etc.), and overspeed protection (set by speed).

[0051] Step S202: Determine whether to trigger a protection action based on the protection signal.

[0052] Figure 3 It is a schematic diagram for judging protection triggering according to an embodiment of the present application. As Figure 3 shown, when both power protection screens send protection signals or the non-electrical quantity protection screen sends a protection signal, the protection action is triggered and the steam turbine trips.

[0053] Step S203: When the protection action is triggered, control the steam turbine in the steam turbine generator set to trip.

[0054] In this embodiment, when the generator protection screen detects a generator protection action and sends a generator protection action signal, the steam turbine receives the protection signal and determines whether to trigger a protection action based on the protection signal. If so, the steam turbine trips and the steam turbine valve is closed, and the equipment stops running.

[0055] Through the above steps S201 to S203, receive the protection signals sent by the first power protection screen, the second power protection screen, and the non-electrical quantity protection screen. The protection signals are generated by the first power protection screen, the second power protection screen, and the non-electrical quantity protection screen based on the operating parameters of the generator in the steam turbine generator set; determine whether to trigger a protection action based on the protection signal, and when the protection action is triggered, control the steam turbine in the steam turbine generator set to trip, solving the problem of low reliability of the protection signal action of the steam turbine generator set. By combining multiple power protection screens with a non-electrical quantity protection screen to send signals, it avoids misoperation of equipment caused by mis-sending of single-point protection signals and improves the reliability of the protection signal action.

[0056] In some of these embodiments, step S202 specifically includes:

[0057] Step S2021, when receiving the first protection signal sent by the first power protection screen and the second protection signal sent by the second power protection screen simultaneously, determine whether to trigger a protection action based on the first protection signal, the second protection signal, and the first preset protection condition.

[0058] It should be noted that when the received protection signals are all signals sent by the power protection screens, it is necessary to receive the signals sent by two power protection screens simultaneously to trigger a protection action.

[0059] In some embodiments, step S2021 includes: determining whether to trigger a protection action based on the reception times and reception times of the first protection signal and the second protection signal, and the first preset protection condition.

[0060] For example, both the first power protection screen and the second power protection screen are set to send three protection signals to the ETS device when triggering protection. In this case, there are two triggering schemes for triggering a protection action through the power protection screen.

[0061] Scheme 1: The first preset protection condition includes a first condition and a second condition. The first condition is receiving at least two first protection signals, and the second condition is receiving at least two second protection signals. Meeting either the first condition or the second condition will trigger a protection action. Figure 4 It is a schematic diagram of protection trigger judgment according to Scheme 1 of the embodiments of the present application.

[0062] Scheme 2: The first preset protection condition includes a third condition, a fourth condition, and a fifth condition. The third condition is receiving the first first protection signal or the first second protection signal, the fourth condition is receiving the second first protection signal or the second second protection signal, and the fifth condition is receiving the third first protection signal or the third second protection signal. If at least two of the third condition, the fourth condition, and the fifth condition are met simultaneously, a protection action is triggered. Figure 5 It is a schematic diagram of protection trigger judgment according to Scheme 2 of the embodiments of the present application.

[0063] Adopting the scheme of "2 out of 3 protection signals sent by the first power protection screen" or "2 out of 3 protection signals sent by the second power protection screen", or the scheme of "2 out of 3 protection signals sent by the first power protection screen and the second power protection screen simultaneously" can effectively avoid equipment misoperation caused by signal mistransmission, including misoperation caused by a single signal line failure, misoperation caused by a single relay or DI / DO channel failure, and signal mistransmission caused by a generator protection screen failure. This method can effectively improve the reliability of the protection signal action.

[0064] In some embodiments, step S202 also includes:

[0065] Step S2022: When receiving the third protection signal sent by the non - electrical protection panel, determine whether to trigger a protection action based on the third protection signal and the second preset protection condition.

[0066] In some embodiments, when the non - electrical protection panel is set to send the third protection signal to the ETS device three times, the second preset protection condition includes: if at least two third protection signals are received simultaneously, trigger a protection action.

[0067] Add a non - electrical protection panel to send a non - electrical protection cabinet trip signal. After the non - electrical protection of the generator acts, the steam turbine also trips. It is not necessary for the equipment to be damaged and then the electrical protection to act abnormally. This speeds up the protection action speed and protects the equipment more comprehensively.

[0068] This application triggers multi - condition electrical protection to avoid misoperation of equipment caused by mis - sending of signals, and triggers protection actions directly after equipment damage through non - electrical protection, which speeds up the protection action speed and protects the equipment more comprehensively.

[0069] It should be noted that the steps shown in the above process or the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer - executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0070] This embodiment also provides a protection system for a steam turbine - generator unit. This system is used to implement the above - mentioned embodiments and preferred implementation manners, and those that have been described will not be repeated. As used hereinafter, terms such as "module", "unit", "sub - unit", etc. can be a combination of software and / or hardware that can achieve a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0071] Figure 6 is the structural block diagram of the protection system for a steam turbine - generator unit according to an embodiment of the present application. As Figure 6 shown, the system includes:

[0072] A signal receiving module 61, configured to receive protection signals sent by the first electrical protection panel, the second electrical protection panel, and the non - electrical protection panel. The protection signals are generated by the first electrical protection panel, the second electrical protection panel, and the non - electrical protection panel based on the operating parameters of the generator in the steam turbine - generator unit.

[0073] A judgment module 62, configured to judge whether to trigger a protection action based on the protection signal.

[0074] A control module 63, configured to control the steam turbine in the steam turbine - generator unit to trip in the case of triggering a protection action.

[0075] In some of these embodiments, the determination module 62 includes:

[0076] A first determination module, configured to, when receiving a first protection signal sent by a first power protection screen and a second protection signal sent by a second power protection screen simultaneously, determine whether to trigger a protection action based on the first protection signal, the second protection signal, and a first preset protection condition;

[0077] A second determination module, configured to, when receiving a third protection signal sent by a non-power protection screen, determine whether to trigger a protection action based on the third protection signal and a second preset protection condition.

[0078] In some of these embodiments, the first determination module includes: an analysis module, configured to determine whether to trigger a protection action based on the reception times and reception times of the first protection signal and the second protection signal, and the first preset protection condition.

[0079] In some of these embodiments, the first power protection screen and the second power protection screen are set to send three protection signals to the ETS device when triggering protection, and the first preset protection condition includes: a first condition and a second condition.

[0080] The first condition is receiving at least two first protection signals, and the second condition is receiving at least two second protection signals.

[0081] If the first condition and / or the second condition is satisfied, the protection action is triggered.

[0082] In some of these embodiments, the first power protection screen and the second power protection screen are set to send three protection signals to the ETS device when triggering protection, and the first preset protection condition includes: a third condition, a fourth condition, and a fifth condition.

[0083] The third condition is receiving the first first protection signal or the first second protection signal.

[0084] The fourth condition is receiving the second first protection signal or the second second protection signal.

[0085] The fifth condition is receiving the third first protection signal or the third second protection signal.

[0086] If at least two of the third condition, the fourth condition, and the fifth condition are satisfied simultaneously, the protection action is triggered.

[0087] In some of these embodiments, in the case where the non-power protection screen is set to send three third protection signals to the ETS device when triggering protection, the second preset protection condition includes: if at least two third protection signals are received simultaneously, the protection action is triggered.

[0088] Through the above system, the signal receiving module 61 receives protection signals sent by the first power protection panel, the second power protection panel, and the non-electrical protection panel. The protection signals are generated by the first power protection panel, the second power protection panel, and the non-electrical protection panel based on the operating parameters of the generator in the steam turbine generator set. The judgment module 62 judges whether to trigger a protection action based on the protection signals. The control module 63 controls the steam turbine in the steam turbine generator set to trip in the case of triggering a protection action, solving the problem of low reliability of the protection signal action of the steam turbine generator set. By combining multiple power protection panels with non-electrical protection panels to send signals, false triggering of equipment caused by mis-sending of single-point protection signals is avoided, and the reliability of the protection signal action is improved.

[0089] It should be noted that the above-mentioned each module can be a functional module or a program module, and can be implemented either by software or by hardware. For the modules implemented by hardware, the above-mentioned each module can be located in the same processor; or the above-mentioned each module can also be located in different processors in any combined form.

[0090] This embodiment also provides an electronic device, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0091] Optionally, the above-mentioned electronic device may further include a transmission device and an input / output device. Among them, the transmission device is connected to the above-mentioned processor, and the input / output device is connected to the above-mentioned processor.

[0092] Optionally, in this embodiment, the above-mentioned processor may be configured to execute the following steps through a computer program:

[0093] S1. Receive protection signals sent by the first power protection panel, the second power protection panel, and the non-electrical protection panel. The protection signals are generated by the first power protection panel, the second power protection panel, and the non-electrical protection panel based on the operating parameters of the generator in the steam turbine generator set.

[0094] S2. Judge whether to trigger a protection action based on the protection signals.

[0095] S3. Control the steam turbine in the steam turbine generator set to trip in the case of triggering a protection action.

[0096] It should be noted that the specific examples in this embodiment may refer to the examples described in the above embodiment and the optional implementation manners, and will not be elaborated herein.

[0097] In one embodiment, Figure 7 is a schematic internal structure diagram of an electronic device according to an embodiment of the present application, as Figure 7As shown, an electronic device is provided. The electronic device may be a server, and its internal structure diagram may be as shown in Figure 7 . The electronic device includes a processor, a memory, a network interface, and a database connected through a system bus. Among them, the processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the electronic device is used to store data. The network interface of the electronic device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, it implements a protection method for a steam turbine generator set.

[0098] Those skilled in the art can understand that Figure 7 the structure shown in is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the electronic device to which the solution of this application is applied. The specific electronic device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0099] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it may include the processes of the embodiments of the above methods. Among them, any reference to the memory, storage, database, or other media used in the various embodiments provided in this application may include non-volatile and / or volatile memories. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory may include random access memory (RAM) or an external cache. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM), etc.

[0100] Those skilled in the art should understand that the technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0101] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A method for protecting a steam turbine generator set, characterized in that: The method is applied to an ETS device, and the method comprises: Receiving protection signals sent by a first electric quantity protection screen, a second electric quantity protection screen and a non-electric quantity protection screen, wherein the protection signals are generated by the first electric quantity protection screen, the second electric quantity protection screen and the non-electric quantity protection screen based on operating parameters of a generator in a steam turbine generator set; Determining whether to trigger a protection action based on the protection signal; When the protection action is triggered, the steam turbine in the steam turbine generator set is controlled to trip.

2. The method according to claim 1, characterized in that The determining whether to trigger a protection action based on the protection signal includes: When a first protection signal sent by the first power protection screen and a second protection signal sent by the second power protection screen are received simultaneously, it is determined whether to trigger a protection action based on the first protection signal, the second protection signal and a first preset protection condition.

3. The method according to claim 2, characterized in that The determining whether to trigger a protection action based on the first protection signal, the second protection signal and the first preset protection condition includes: Whether to trigger a protection action is determined based on the number of times and the time at which the first protection signal and the second protection signal are received, and a first preset protection condition.

4. The method according to claim 3, characterized in that The first power protection screen and the second power protection screen are configured to send three protection signals to the ETS device when protection is triggered. The first preset protection condition includes: a first condition and a second condition. The first condition is receiving the first protection signal at least twice, The second condition is receiving the second protection signal at least twice, If the first condition and / or the second condition is met, the protection action is triggered.

5. The method according to claim 3, characterized in that: The first power protection screen and the second power protection screen are configured to send three protection signals to the ETS device when protection is triggered, and the first preset protection condition includes: a third condition, a fourth condition and a fifth condition. The third condition is receiving the first protection signal for the first time or the second protection signal for the first time, The fourth condition is receiving the first protection signal for the second time or the second protection signal for the second time, The fifth condition is receiving the first protection signal for the third time or the second protection signal for the third time, If at least two of the third condition, the fourth condition and the fifth condition are met simultaneously, the protection action is triggered.

6. The method according to claim 1, characterized in that The determining whether to trigger a protection action based on the protection signal includes: When the third protection signal sent by the non-electrical power protection screen is received, it is determined whether to trigger a protection action based on the third protection signal and the second preset protection condition.

7. The method according to claim 6, characterized in that The non-electrical protection screen is configured to send three third protection signals to the ETS device when protection is triggered, and the second preset protection condition includes: if at least two third protection signals are received simultaneously, a protection action is triggered.

8. A protection system for a steam turbine generator set, characterized in that: The system comprises: A signal receiving module, used to receive protection signals sent by the first electric quantity protection screen, the second electric quantity protection screen and the non-electric quantity protection screen, wherein the protection signals are generated by the first electric quantity protection screen, the second electric quantity protection screen and the non-electric quantity protection screen based on the operating parameters of the generator in the steam turbine generator set; A judgment module, used for judging whether to trigger a protection action based on the protection signal; The control module is used to control the steam turbine in the steam turbine generator set to trip when a protection action is triggered.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the protection method for the steam turbine generator set according to any one of claims 1 to 7 is implemented.

10. A storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the protection method of the steam turbine generator set as described in any one of claims 1 to 7 is implemented.

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