Steam turbine alarm control circuit and electronic equipment

Abstract

The utility model relates to a steam turbine alarm control circuit and electronic equipment. The steam turbine alarm control circuit comprises a steam turbine rotating speed alarm circuit and a steam turbine rotating speed alarm elimination circuit. The steam turbine rotating speed alarm circuit is used for generating a steam turbine rotating speed alarm signal when the rotating speed of the steam turbine is smaller than a first rotating speed threshold value; the steam turbine rotating speed alarm elimination circuit is used for allowing elimination of the steam turbine rotating speed alarm signal when the rotating speed of the steam turbine is larger than a second rotating speed threshold value or the high-pressure cylinder temperature of the steam turbine is smaller than a cylinder temperature threshold value. The embodiment of the utility model can prevent the steam turbine in the hot state from stalling or mistakenly eliminating the low rotating speed alarm, so that the risk of bending of the main shaft of the steam turbine can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of steam turbine alarm control, and in particular to a steam turbine alarm control circuit and electronic equipment. Background Art

[0002] During the reverse warming and stuffing process of the high-pressure cylinder of the turbine, the clearance of the turbine bridge shaft seal increases, and the steam entering the high-pressure cylinder will pass through the bridge steam seal and into the intermediate-pressure cylinder to perform work, causing the turbine speed to increase, causing the cranking gear to trip and the rotor to stop. If it is not discovered in time and the cranking gear is not put into continuous operation, it will cause uneven heating on the upper and lower parts of the turbine main shaft, causing the turbine main shaft to bend.

[0003] Although the DCS system is equipped with a turbine hot state shutdown or low speed alarm to prevent the turbine cranking tripping in a hot state and causing the main shaft to bend, the alarm is currently easily eliminated by mistake, which will cause the on-duty personnel to fail to discover the cranking tripping and turbine rotor shutdown in time, and there is still a risk of turbine main shaft bending. Utility Model Content

[0004] The purpose of the present disclosure is to provide a steam turbine alarm control circuit and electronic equipment, which can prevent the stall of the steam turbine in a hot state or the low speed alarm from being mistakenly eliminated, thereby reducing the risk of bending of the steam turbine main shaft.

[0005] In order to achieve the above-mentioned object, according to a first aspect of an embodiment of the present disclosure, a steam turbine alarm control circuit is provided, the steam turbine alarm control circuit comprising: a steam turbine speed alarm circuit and a steam turbine speed alarm elimination circuit;

[0006] The steam turbine speed alarm circuit is used to generate a steam turbine speed alarm signal when the speed of the steam turbine is less than a first speed threshold;

[0007] The steam turbine speed alarm elimination circuit is used to allow the steam turbine speed alarm signal to be eliminated when the speed of the steam turbine is greater than a second speed threshold, or the high-pressure cylinder temperature of the steam turbine is less than a cylinder temperature threshold.

[0008] Optionally, the turbine speed alarm circuit comprises: a first lower limit monitor and a delay device;

[0009] The input end of the first lower limit monitor is used to connect to the turbine speed input signal, the output end of the first lower limit monitor is connected to the input end of the delay device, and the output end of the delay device is used to output the turbine speed alarm signal.

[0010] Optionally, the turbine speed alarm elimination circuit comprises: a high limit monitor, a second low limit monitor, an OR gate, an AND gate and an RS trigger;

[0011] The input end of the high limit monitor is used to connect the turbine speed input signal, and the output end of the high limit monitor is connected to the first input end of the OR gate;

[0012] The input end of the second low limit monitor is used to connect to the high pressure cylinder temperature input signal, and the output end of the second low limit monitor is connected to the second input end of the OR gate;

[0013] The output end of the OR gate is connected to the first input end of the AND gate, and the second input end of the AND gate is used to connect the alarm confirmation button input signal quantity;

[0014] The output end of the AND gate is connected to the set end of the RS trigger, and the output end of the RS trigger is used to output a turbine speed alarm elimination signal.

[0015] Optionally, the lower limit value of the first lower limit monitor is the first rotation speed threshold;

[0016] The first lower limit monitor is configured to output a true value when the rotation speed of the steam turbine is less than the first rotation speed threshold.

[0017] Optionally, the upper limit value of the upper limit monitor is the second rotation speed threshold;

[0018] The high limit monitor is configured to output a true value when the rotation speed of the steam turbine is greater than the second rotation speed threshold.

[0019] Optionally, the lower limit value of the second lower limit monitor is the cylinder temperature threshold;

[0020] The second low limit monitor is used for outputting a true value when the high pressure cylinder temperature of the steam turbine is less than the cylinder temperature threshold.

[0021] Optionally, the delay time of the delay device is 1 second.

[0022] Optionally, the first rotation speed threshold is 1 revolution per minute.

[0023] Optionally, the second rotation speed threshold is 1.5 revolutions per minute.

[0024] Optionally, the cylinder temperature threshold is 150°C.

[0025] According to a second aspect of an embodiment of the present disclosure, there is provided an electronic device, comprising the steam turbine alarm control circuit described in any one of the first aspects.

[0026] In summary, the disclosed embodiment provides a steam turbine alarm control circuit, the steam turbine alarm control circuit comprising: a steam turbine speed alarm circuit and a steam turbine speed alarm elimination circuit; the steam turbine speed alarm circuit is used to generate a steam turbine speed alarm signal when the speed of the steam turbine is less than a first speed threshold; the steam turbine speed alarm elimination circuit is used to allow the steam turbine speed alarm signal to be eliminated when the speed of the steam turbine is greater than a second speed threshold, or the high-pressure cylinder temperature of the steam turbine is less than a cylinder temperature threshold. The disclosed embodiment can prevent the shutdown of the steam turbine in a hot state or the low speed alarm from being mistakenly eliminated, thereby reducing the risk of bending of the main shaft of the steam turbine.

[0027] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0029] Figure 1 The diagram is a schematic diagram of a steam turbine alarm control circuit according to an exemplary embodiment.

[0030] Figure 2 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0031] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0032] It should be understood that the term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0033] It should be noted that the concepts of "first", "second", etc. mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units. The modifications of "one" and "multiple" mentioned in the present disclosure are illustrative and not restrictive. Those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more". In the description of the present disclosure, unless otherwise specified, "multiple" refers to two or more than two, and other quantifiers are similar; "at least one item", "one item or multiple items" or similar expressions refer to any combination of these items, including any combination of single items or plural items.

[0034] Although operations or steps are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood that it is required to perform these operations or steps in the specific order shown or in a serial order, or to perform all the operations or steps shown to obtain the desired results. In the embodiments of the present disclosure, these operations or steps can be performed in series; these operations or steps can also be performed in parallel; or some of these operations or steps can be performed.

[0035] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only for illustrative purposes and are not used to limit the scope of these messages or information. It is understandable that before using the technical solutions disclosed in the embodiments of the present disclosure, the types, scope of use, usage scenarios, etc. of the personal information involved in the present disclosure should be informed to the user in an appropriate manner in accordance with relevant laws and regulations and the user's authorization should be obtained. The present disclosure is described below in conjunction with specific embodiments.

[0036] First, the application scenario of the present invention is explained. The transmission mechanism of the turbine turning gear consists of the following parts: turning gear, swing gear, pinion, reduction gear, intermediate gear, turbine, worm gear, driven wheel and motor transmission chain. The swing gear is a movable transmission mechanism. The rocker arm is connected to the operating handle of the turning device and the piston rod of the pneumatic actuator. Its rotation center is located on the driving gear shaft. The swing gear revolves on the pinion of the driving shaft. When the rocker arm rotates clockwise to a certain position, the swing gear and the rotor turning gear enter a meshing state. The drive motor transmits torque through the chain, turbine, worm gear and reduction gear to make the swing wheel gear rotate clockwise, and the turning gear drives the rotor to rotate at a speed of 1.5r / min.

[0037] Before the turbine is started and after it is shut down, continuous cranking is required to avoid the turbine cranking tripping in a hot state and the bending and deformation of the main shaft caused by the rotor stopping. Before the turbine is started and turned, the steam is supplied by the shaft seal at both ends of the rotor, and the steam leaks into the turbine from both ends of the shaft seal and concentrates on the upper part of the cylinder, causing a temperature difference between the rotor and the cylinder. At this time, if the rotor does not move, the rotor will be thermally bent. After the turbine is shut down, the cylinder and rotor still have a high temperature, and the temperature drop rate of the upper and lower cylinders of the turbine is different. At this time, if the rotor is not running continuously, the rotor will be unevenly heated and bent.

[0038] At present, in order to prevent the turbine cranking from tripping in a hot state and causing the bending of the main shaft, the following measures are taken: 1. A dedicated person shall monitor the cranking after shutdown and before restarting, strengthen the monitoring of the cranking current and turbine speed, and conduct a detailed on-site inspection of the cranking operation and engagement status once every hour; 2. When the high-pressure cylinder is warmed up, the pressure after the stage is adjusted to be controlled at 0.39MPa~0.49MPa, and the maximum shall not exceed 0.55MPa. When the cylinder is stuffy, the pressure after the stage is adjusted to be controlled at 0.5~0.7MPa, and the maximum shall not exceed 0.7Mpa. During the process, the cranking operation, cranking current and rotor eccentricity indication shall be strengthened; 3. DCS adds an audible and visual alarm when the turbine speed is less than 1r / min, which is convenient for operation and maintenance personnel to remotely monitor the operation of the turbine.

[0039] Since the cranking current does not change much when the cranking trips, it is difficult to judge from this parameter that the cranking is running but the rotor has stopped. The changes in rotor speed and eccentricity exist due to the differences in the technical level of the on-duty personnel, and they may not be able to detect the changes in this parameter in time when it is abnormal. At this time, the DCS remote monitoring alarm is mainly relied on to judge whether the turbine rotor speed is abnormal, but the existing DCS remote monitoring turbine speed alarm is easily eliminated by the on-duty personnel by mistake, which will cause the on-duty personnel to fail to detect the cranking trip in time, and there is still a risk of bending of the turbine shaft.

[0040] Figure 1 FIG. 1 is a schematic diagram of a steam turbine alarm control circuit according to an exemplary embodiment. Figure 1As shown, an embodiment of the present disclosure provides a turbine alarm control circuit 100, which includes: a turbine speed alarm circuit 101 and a turbine speed alarm elimination circuit 102; the turbine speed alarm circuit 101 is used to generate a turbine speed alarm signal when the speed of the turbine is less than a first speed threshold; the turbine speed alarm elimination circuit 102 is used to allow the turbine speed alarm signal to be eliminated when the speed of the turbine is greater than a second speed threshold, or the high-pressure cylinder temperature of the turbine is less than the cylinder temperature threshold. Exemplarily, when the speed of the turbine is less than a first speed threshold (e.g., 1 revolution per minute), the turbine speed alarm circuit 101 generates a turbine speed alarm signal. When the speed of the turbine is greater than a second speed threshold (e.g., 1.5 revolutions per minute), or the high-pressure cylinder temperature of the turbine is less than the cylinder temperature threshold (e.g., 150°C), the turbine speed alarm signal can be manually eliminated through the alarm confirmation button. Otherwise, the turbine speed alarm signal will always exist to alert the operation and maintenance personnel and send people to the site to deal with it in time. This avoids the possibility of the on-duty personnel mistakenly eliminating the alarm, ensures that the on-duty personnel promptly discover the turning gear tripping and rotor stalling, and completely eliminates the possibility of the turbine main shaft bending due to the turning gear tripping and rotor stalling, thereby eliminating safety hazards.

[0041] In summary, the disclosed embodiment provides a steam turbine alarm control circuit, the steam turbine alarm control circuit comprising: a steam turbine speed alarm circuit and a steam turbine speed alarm elimination circuit; the steam turbine speed alarm circuit is used to generate a steam turbine speed alarm signal when the speed of the steam turbine is less than a first speed threshold; the steam turbine speed alarm elimination circuit is used to allow the steam turbine speed alarm signal to be eliminated when the speed of the steam turbine is greater than a second speed threshold, or the high-pressure cylinder temperature of the steam turbine is less than a cylinder temperature threshold. The disclosed embodiment can prevent the shutdown of the steam turbine in a hot state or the low speed alarm from being mistakenly eliminated, thereby reducing the risk of bending of the main shaft of the steam turbine.

[0042] In some embodiments, the turbine speed alarm circuit 101 includes: a first lower limit monitor H1 and a delay device H2; the input end of the first lower limit monitor H1 is used to connect the turbine speed input signal, and illustratively, the turbine speed input signal can come from the turbine speed sensor, and the signal is an analog quantity. The output end of the first lower limit monitor H1 is connected to the input end of the delay device H2, and the output end of the delay device H2 is used to output a turbine speed alarm signal. Exemplarily, the lower limit value of the first lower limit monitor H1 is a first speed threshold value (for example, 1 revolution per minute), and the first lower limit monitor H1 is used to output a true value when the speed of the turbine is less than the first speed threshold value.

[0043] The working principle of the turbine speed alarm circuit 101 is: when the speed of the turbine is less than the first speed threshold (for example, 1 revolution per minute), the output of the first lower limit monitor H1 is true, and then a turbine speed alarm signal is generated after a delay time (for example, 1 second) of the delay device H2.

[0044] In some embodiments, the turbine speed alarm elimination circuit 102 includes: a high limit monitor H3, a second low limit monitor H4, an OR gate H5, an AND gate H6, and an RS trigger H7; the input end of the high limit monitor H3 is used to connect the turbine speed input signal, and the output end of the high limit monitor H3 is connected to the first input end of the OR gate H5; the input end of the second low limit monitor H4 is used to connect the high pressure cylinder temperature input signal, and the high pressure cylinder temperature input signal can be from the high pressure cylinder temperature sensor of the turbine, and the signal is an analog quantity. The output end of the second low limit monitor H4 is connected to the second input end of the OR gate H5; the output end of the OR gate H5 is connected to the first input end of the AND gate H6, and the second input end of the AND gate H6 is used to connect the input signal of the alarm confirmation button P, and the signal is digital signal. When the alarm confirmation button P is pressed, the signal is 1, and when the alarm confirmation button P is not pressed, the signal is 0. The output end of the AND gate H6 is connected to the set end of the RS trigger H7, and the output end of the RS trigger H7 is used to output the turbine speed alarm elimination signal.

[0045] Exemplarily, the high limit value of the high limit monitor H3 is the second speed threshold value (e.g., 1.5 revolutions per minute); the high limit monitor H3 is used to output true when the speed of the steam turbine is greater than the second speed threshold value. The low limit value of the second low limit monitor H4 is the cylinder temperature threshold value (e.g., 150°C); the second low limit monitor H4 is used to output true when the high pressure cylinder temperature of the steam turbine is less than the cylinder temperature threshold value.

[0046] The working principle of the steam turbine speed alarm elimination circuit 102 is: only when the output of the OR gate H5 is true and the alarm confirmation button P is pressed, the output of the AND gate H6 can be true, and the RS trigger H7 can be controlled by the set end S of the RS trigger H7 to output the steam turbine speed alarm elimination signal, thereby turning off the steam turbine speed alarm. For example, the steam turbine speed alarm can be an audible and visual alarm. If the output of the OR gate H5 is true, any one of its two input signals must be true, that is, the output of the high limit monitor H3 is true, or the output of the second low limit monitor H4 is true. According to the above logic, that is, the speed of the steam turbine needs to be greater than the second speed threshold (for example, 1.5 revolutions per minute), or the high pressure cylinder temperature of the steam turbine is less than the cylinder temperature threshold (for example, 150°C), and the alarm confirmation button P is pressed, the steam turbine speed alarm can be eliminated. This avoids the possibility of the on-duty personnel mistakenly canceling the alarm, ensures that the on-duty personnel can promptly discover the turning gear tripping and rotor stalling, and completely eliminates the possibility of the turbine main shaft bending due to the turning gear tripping and rotor stalling, thus eliminating safety hazards.

[0047] In some embodiments, the lower limit value of the first lower limit monitor H1 is a first rotation speed threshold; the first lower limit monitor H1 is used for outputting a true value when the rotation speed of the steam turbine is less than the first rotation speed threshold.

[0048] In some embodiments, the high limit value of the high limit monitor H3 is a second speed threshold; the high limit monitor H3 is used to output true when the speed of the steam turbine is greater than the second speed threshold.

[0049] In some embodiments, the lower limit value of the second lower limit monitor H4 is a cylinder temperature threshold; the second lower limit monitor H4 is used to output true when the high-pressure cylinder temperature of the steam turbine is less than the cylinder temperature threshold.

[0050] In some embodiments, the delay time of the delay device H2 may be 1 second.

[0051] In some embodiments, the first rotation speed threshold may be 1 revolution per minute.

[0052] In some embodiments, the second rotation speed threshold may be 1.5 revolutions per minute.

[0053] In some embodiments, the cylinder temperature threshold may be 150°C.

[0054] In summary, the disclosed embodiment provides a steam turbine alarm control circuit, the steam turbine alarm control circuit comprising: a steam turbine speed alarm circuit and a steam turbine speed alarm elimination circuit; the steam turbine speed alarm circuit is used to generate a steam turbine speed alarm signal when the speed of the steam turbine is less than a first speed threshold; the steam turbine speed alarm elimination circuit is used to allow the steam turbine speed alarm signal to be eliminated when the speed of the steam turbine is greater than a second speed threshold, or the high-pressure cylinder temperature of the steam turbine is less than a cylinder temperature threshold. The disclosed embodiment can prevent the shutdown of the steam turbine in a hot state or the low speed alarm from being mistakenly eliminated, thereby reducing the risk of bending of the main shaft of the steam turbine.

[0055] Figure 2 FIG. 1 is a block diagram of an electronic device according to an exemplary embodiment. Figure 2 As shown, an embodiment of the present disclosure provides an electronic device 200, including the turbine alarm control circuit 100 described in any one of the above embodiments. The electronic device 200 may be a DCS, and the electronic device 200 may include: a processor 201, a memory 202. The electronic device 200 may also include one or more of a multimedia component 203, an input / output (I / O) interface 204, and a communication component 205.

[0056] The processor 201 is used to control the overall operation of the electronic device 200, and the memory 202 is used to store various types of data to support the operation of the electronic device 200. These data may include, for example, instructions for any application or method used to operate on the electronic device 200, and application-related data, such as contact data, messages sent and received, pictures, audio, video, etc. The memory 202 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, disk or optical disk. The multimedia component 203 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 202 or sent through the communication component 205. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 204 provides an interface between the processor 201 and other interface modules, and the other interface modules may be keyboards, mice, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 205 is used for wired or wireless communication between the electronic device 200 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, is not limited here. Therefore, the corresponding communication component 205 may include: Wi-Fi module, Bluetooth module, NFC module, etc.

[0057] In an exemplary embodiment, the electronic device 200 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components.

[0058] In another exemplary embodiment, a computer-readable storage medium including program instructions is further provided. For example, the computer-readable storage medium may be the above-mentioned memory 202 including program instructions, and the above-mentioned program instructions may be executed by the processor 201 of the electronic device 200 .

[0059] In another exemplary embodiment, a steam turbine is further provided, comprising the above-mentioned steam turbine alarm control circuit 100 .

[0060] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0061] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0062] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A steam turbine alarm control circuit, characterized in that: The steam turbine alarm control circuit comprises: a steam turbine speed alarm circuit and a steam turbine speed alarm elimination circuit; The steam turbine speed alarm circuit is used to generate a steam turbine speed alarm signal when the speed of the steam turbine is less than a first speed threshold; The steam turbine speed alarm elimination circuit is used to allow the steam turbine speed alarm signal to be eliminated when the speed of the steam turbine is greater than a second speed threshold, or the high-pressure cylinder temperature of the steam turbine is less than a cylinder temperature threshold.

2. The steam turbine alarm control circuit according to claim 1, characterized in that: The steam turbine speed alarm circuit comprises: a first lower limit monitor and a time delay device; The input end of the first lower limit monitor is used to connect to the turbine speed input signal, the output end of the first lower limit monitor is connected to the input end of the delay device, and the output end of the delay device is used to output the turbine speed alarm signal.

3. The steam turbine alarm control circuit according to claim 2, characterized in that: The steam turbine speed alarm elimination circuit comprises: a high limit monitor, a second low limit monitor, an OR gate, an AND gate and an RS trigger; The input end of the high limit monitor is used to connect the turbine speed input signal, and the output end of the high limit monitor is connected to the first input end of the OR gate; The input end of the second low limit monitor is used to connect to the high pressure cylinder temperature input signal, and the output end of the second low limit monitor is connected to the second input end of the OR gate; The output end of the OR gate is connected to the first input end of the AND gate, and the second input end of the AND gate is used to connect the alarm confirmation button input signal quantity; The output end of the AND gate is connected to the set end of the RS trigger, and the output end of the RS trigger is used to output a turbine speed alarm elimination signal.

4. The steam turbine alarm control circuit according to claim 2, characterized in that: The lower limit value of the first lower limit monitor is the first rotation speed threshold; The first lower limit monitor is configured to output a true value when the rotation speed of the steam turbine is less than the first rotation speed threshold.

5. The steam turbine alarm control circuit according to claim 3, characterized in that: The high limit value of the high limit monitor is the second speed threshold; The high limit monitor is configured to output a true value when the rotation speed of the steam turbine is greater than the second rotation speed threshold.

6. The steam turbine alarm control circuit according to claim 3, characterized in that: The lower limit value of the second lower limit monitor is the cylinder temperature threshold; The second low limit monitor is used for outputting a true value when the high pressure cylinder temperature of the steam turbine is less than the cylinder temperature threshold.

7. The steam turbine alarm control circuit according to any one of claims 2 to 6, characterized in that: The delay time of the delay device is 1 second.

8. The steam turbine alarm control circuit according to any one of claims 1 to 6, characterized in that: The first rotation speed threshold is 1 revolution per minute.

9. The steam turbine alarm control circuit according to any one of claims 1 to 6, characterized in that: The second rotation speed threshold is 1.5 revolutions per minute.

10. The steam turbine alarm control circuit according to any one of claims 1 to 6, characterized in that: The cylinder temperature threshold is 150°C.

11. An electronic device, characterized in that: The invention comprises the steam turbine alarm control circuit according to any one of claims 1 to 10.

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