Shaft system torsional vibration protection device and method of steam turbine generator unit, electronic equipment and storage medium

Abstract

The invention provides a torsional vibration protection device and method for a shaft system of a steam turbine generator unit, electronic equipment and a storage medium. The protection device comprises a rotating speed pulse signal acquisition module for acquiring rotating speed pulse signals of a machine head and a machine tail of the steam turbine generator unit; the switching value input module collects switching value information of a generator set and a pressing plate; the alternating current signal sampling module collects three-phase current and three-phase voltage of a generator end; the central processing module demodulates and filters the rotating speed pulse signal to obtain each oscillation mode signal and give a trend signal; the switching value information of the unit is judged, and a trend signal is given; processing the three-phase current and the three-phase voltage to obtain power, and giving a trend signal for power judgment; the tripping module carries out generator tripping processing on the secondary sides of the steam turbine generator unit, the generator unit, the pressing plate, the current transformer and the voltage transformer according to the trend signal of the oscillation mode signal, the trend signal of the switching value signal and the trend signal of the power, and the function of coordinated cutting can be supported.

Description

Technical Field

[0001] The present invention belongs to the technical field of a steam turbine generator set shaft system torsional vibration protection device, and in particular relates to a steam turbine generator set shaft system torsional vibration protection device and method, electronic equipment, and storage medium. Background Art

[0002] The existing torsional vibration protection device is configured according to the unit. By measuring the change in the angular velocity at the machine end, it is separated by bandpass filtering and then the modal sampling value and amplitude are judged respectively to obtain the shaft fatigue condition and subsynchronous modal change trend of the currently running unit. The generator set is protected by disconnecting the generator from the power grid or destroying the conditions for the formation of subsynchronous oscillation.

[0003] The current torsional vibration protection device is designed with the focus on the real-time protection needs of the installed steam turbine generator sets. However, in some special application scenarios, such as the typical application scenario where multiple units of the same type are connected to an AC series-compensated line for transmission, if subsynchronous resonance occurs, then the same type of units will have torsional vibration problems. The feasible condition for destroying the resonance is to remove the unit, and the degree of destruction of the resonance is related to the number of units removed. In most cases, it is not necessary to remove multiple units at the same time.

[0004] Therefore, it is necessary to propose a protection device that can support coordinated resection. Summary of the invention

[0005] The present disclosure aims to solve at least one of the technical problems existing in the prior art, and provides a steam turbine generator set shaft system torsional vibration protection device and method, electronic equipment and storage medium.

[0006] In one aspect of the present disclosure, a torsional vibration protection device for a shaft system of a steam turbine generator set is provided, comprising:

[0007] The speed pulse signal acquisition module is used to collect the speed pulse signals of the head and tail of the steam turbine generator set;

[0008] Switching quantity input module, used to collect switching quantity information of generator sets and pressure plates;

[0009] AC signal sampling module, used to collect three-phase current and three-phase voltage at the generator end;

[0010] The central processing module is used to demodulate and filter the speed pulse signal, obtain various oscillation mode signals and give trend signals; it is also used to judge the switch quantity information of the unit and give trend signals; it is also used to process the three-phase current and three-phase voltage to obtain power, further judge the power and give trend signals;

[0011] The tripping module is used to cut off the secondary sides of the steam turbine generator set, the generator set and the pressure plate, the current transformer and the voltage transformer respectively according to the trend signal of the oscillation mode signal, the trend signal of the switch signal and the trend signal of the power.

[0012] Optionally, the protection device further includes two power supply modules of redundant design, and the power supply modules are electrically connected to the protection device.

[0013] Optionally, the protection device further comprises a power-off self-holding open inertia output module, and the power-off self-holding open inertia output module is electrically connected to the power supply module and the central processing module respectively; wherein,

[0014] The power-off self-holding open inertia output module is used to determine whether the power module is powered off, and to keep the device closed when the power is off.

[0015] Optionally, the protection device further includes a common switch output module, which is electrically connected to the protection device and is used to determine whether the protection device can communicate or collect signals normally, and to send a warning signal when it cannot communicate or collect signals normally.

[0016] Optionally, the central processing module is also connected to the terminal via a communication method to output various trend signals.

[0017] Another aspect of the present disclosure provides a method for protecting a shaft system of a steam turbine generator set from torsional vibration, the method comprising:

[0018] Collect the speed pulse signals of the head and tail of the steam turbine generator set;

[0019] Collect switch quantity information of generator sets and pressure plates;

[0020] Collect the three-phase current and three-phase voltage at the generator end;

[0021] Demodulating and filtering the speed pulse signal to obtain each oscillation mode signal and provide a trend signal;

[0022] Judge the switch quantity information of the unit and give trend signals;

[0023] Process the three-phase current and three-phase voltage to obtain power, further judge the power and give trend signals;

[0024] The secondary sides of the steam turbine generator set, the generator set and the pressure plate, the current transformer and the voltage transformer are cut off respectively according to the trend signal of the oscillation mode signal, the trend signal of the switch signal and the trend signal of the power.

[0025] Optionally, the protection method includes:

[0026] Determine whether the protection device is powered off, and keep the protection device signal closed in the event of a power outage.

[0027] Optionally, the protection method further includes:

[0028] Determine whether the protection device can communicate or collect signals normally, and send out a warning signal when it cannot communicate or collect signals normally.

[0029] In another aspect of the present disclosure, an electronic device is provided, comprising:

[0030] one or more processors;

[0031] The memory is used to store one or more programs, and when the one or more programs are executed by the one or more processors, the one or more processors can implement the protection method described above.

[0032] Another aspect of the present disclosure provides a computer-readable storage medium having a computer program stored thereon.

[0033] When the computer program is executed by a processor, the protection method described above can be implemented.

[0034] The present disclosure proposes a torsional vibration protection device and method for the shaft system of a steam turbine generator set, an electronic device and a storage medium. The protection device includes: a speed pulse signal acquisition module, which is used to collect the speed pulse signals of the head and tail of the steam turbine generator set; a switch quantity input module, which is used to collect the switch quantity information of the generator set and the pressure plate; an AC signal sampling module, which is used to collect the three-phase current and three-phase voltage at the generator end; a central processing module, which is used to demodulate and filter the speed pulse signal, obtain each oscillation mode signal and give a trend signal; it is also used to judge the switch quantity information of the unit and give a trend signal; it is also used to process the three-phase current and three-phase voltage to obtain power, further judge the power and give a trend signal; a tripping module, which is used to cut off the secondary side of the steam turbine generator set, the generator set and the pressure plate, the current transformer and the voltage transformer respectively according to the trend signal of the oscillation mode signal, the trend signal of the switch quantity signal and the trend signal of the power. The present disclosure can support the function of coordinated cutting and provide a corresponding coordinated cutting function interface to meet the needs of optimized cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic structural diagram of a steam turbine generator shaft system torsional vibration protection device according to an embodiment of the present disclosure;

[0036] Figure 2A logic control diagram of a steam turbine generator shaft system torsional vibration protection device according to another embodiment of the present disclosure;

[0037] Figure 3 A flowchart of a method for protecting a shaft system of a steam turbine generator set from torsional vibration according to another embodiment of the present disclosure;

[0038] Figure 4 The figure is a schematic diagram of an electronic device according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0040] like Figure 1 and Figure 2As shown, in one aspect of the present disclosure, a torsional vibration protection device 100 for the shaft system of a steam turbine generator set is proposed, comprising: a speed pulse signal acquisition module 110, a switch input module 120, an AC signal sampling module 130, a central processing module 140, and a trip module 150. Among them, the input end of the speed pulse signal acquisition module 110 is electrically connected to the steam turbine speed signal measurement device, and the output end is electrically connected to the central processing module. The speed pulse signal acquisition module 110 is used to collect the speed pulse signals of the head and tail of the steam turbine generator set. Secondly, the input end of the switch input module 120 is electrically connected to the generator switch signal acquisition unit and the pressure plate information acquisition unit, and the output end is electrically connected to the central processing module. The switch input module 120 is used to collect the switch position and pressure plate information of the generator set. Secondly, the input end of the AC signal sampling module 130 is electrically connected to the secondary side of the current transformer and the voltage transformer, and the output end is electrically connected to the central processing module, and the AC signal sampling module 130 is used to collect the three-phase current and three-phase voltage at the generator end as an auxiliary criterion for protection. The central processing module 140 is used to obtain corresponding signals from the speed pulse signal acquisition module 110, the switch input module 120, and the AC signal sampling module 130, and demodulate and filter the speed pulse signal to obtain each oscillation mode signal and give a trend signal; it is also used to judge the switch information of the unit and give a trend signal; it is also used to process the three-phase current and three-phase voltage to obtain power, further judge the power and give a trend signal. Furthermore, the input end of the trip module 150 is electrically connected to the central processing module, and the output end corresponds to the secondary side of the steam turbine generator set, the generator set and the pressure plate, the current transformer and the voltage transformer, and is used to cut off the secondary side of the steam turbine generator set, the generator set and the pressure plate, the current transformer and the voltage transformer according to the trend signal of the oscillation mode signal, the trend signal of the switch signal, and the trend signal of the power.

[0041] In this embodiment, by obtaining the speed pulse signals of the turbine head and tail, the unit switching quantity information, and the three-phase current and three-phase voltage data at the engine end, the different units are coordinated through the central processing module, and the corresponding coordinated cutting function interface is provided to meet the needs of optimized cutting. It can meet the needs of different application scenarios and provide different contact types, which can meet both the needs of signal monitoring and the needs of reliable action.

[0042] It should be noted that the trip module of this embodiment is used with a trip plug-in, which is equipped with a start relay to achieve reliable protection action and provide corresponding trend signals for coordinated machine cutting.

[0043] It should be understood that the tripping module includes three tripping sub-modules, which respectively correspond to the secondary sides of the steam turbine generator set, the generator set and the pressure plate, the current transformer and the voltage transformer. That is to say, by setting sub-modules corresponding to different units, the machine cutting function of the unit can be realized, that is, according to the trend signals judged by different acquisition modules and the central processing module, the corresponding tripping sub-module performs specific operations to realize the coordinated cutting of different units.

[0044] It should also be understood that the protection device should have a power module to provide power to it, such as Figure 1 As shown, the protection device also includes two redundant power modules 160, which are electrically connected to the protection device 100. The two redundant power modules can provide two AC and DC power supplies to the device. Figure 2 As shown, the two PW101 modules in the figure are power modules.

[0045] Furthermore, if Figure 1 As shown, the protection device 100 also includes a power-off self-holding open inertia output module 170, which is electrically connected to the power module 160 and the central processing module 140 respectively; wherein, the power-off self-holding open inertia output module 170 is used to determine whether the power module 160 is powered off, and to keep the protection device 100 closed in the event of a power outage. In other words, the power-off self-holding open inertia output module is a signal plug-in, which determines whether the power module is powered off. This signal plug-in will directly send a power-off signal to the central processing module, and the closed state of the signal can still be maintained, thus providing a basis for accident tracing.

[0046] Furthermore, if Figure 1 As shown, the protection device 100 also includes a common switch output module 180, which is electrically connected to the protection device 100 and is used to determine whether the protection device 100 can communicate or collect signals normally, and to send a warning signal when it cannot communicate or collect signals normally, and at the same time upload the fault signal to the central processing module.

[0047] The central processing module of this embodiment can realize the processing of protection criteria, and can also comprehensively manage all information of the speed pulse signal acquisition module, the switch input module, the power-off self-holding inertia output module, the ordinary switch output module, the switch output module with starting relay and the AC signal sampling module.

[0048] It should also be understood that the central processing module of the present embodiment can also be connected to an industrial computer and other communication terminals. For example, when the central processing module is connected to the industrial computer, it can receive and process a large amount of data, obtain the operating parameters of the equipment, and control the equipment according to these parameters. For example, when a torsional vibration anomaly is detected, the industrial computer can take protective measures by controlling related equipment. For another example, the central processing module can be connected to the terminal via Ethernet or other serial communication methods to output trend judgment information of the torsional vibration protection device. In other words, the trend judgment information of the torsional vibration protection device of the present embodiment can also be given through communication or other methods instead of using node information. For example, each trend signal can be given through Ethernet or other serial communication methods. In addition, in order to meet different application needs, a complete action contact type is also provided, which can not only meet the needs of signal monitoring, but also ensure reliable action.

[0049] Combined Figure 2 As shown, Figure 2 Among them, PW101 is the power module, PI102T is the signal acquisition module, corresponding to the speed pulse signal acquisition module and the AC signal sampling module, DI102T is the digital input module, corresponding to the switch input module, CM101 is the central processing module, DO104T, DO102T, DO103T correspond to the power-off self-holding open inertia output module, ordinary switch output module and trip module respectively.

[0050] The protection device of this embodiment can be connected to the industrial computer through the central processing module, and can support the storage of a large number of recorded data to provide support for further data analysis. At the same time, the device has an interface for coordinated machine cutting, that is, the device defines a switch output node for trend judgment based on the traditional divergent protection criterion and fatigue protection action criterion of torsional vibration protection. Compared with the existing protection device, it not only outputs action information, but also provides trend information after the action, providing a reasonable basis for further protection action behavior, thereby avoiding the occurrence of excessive cutting of units when subsynchronous resonance occurs, and reducing the impact on the system to a minimum. In addition, the protection device of this embodiment provides trend information output of the unit torsional vibration signal, that is, the device has an interface for coordinated machine cutting.

[0051] like Figure 3 As shown, another aspect of the present disclosure provides a method S200 for protecting the shaft system of a steam turbine generator set from torsional vibration, which specifically includes the following steps S210 to S270:

[0052] S210, collecting speed pulse signals from the head and tail of the steam turbine generator set.

[0053] S220, collecting switch quantity information of the generator set and the pressure plate;

[0054] S230, collecting three-phase current and three-phase voltage at the generator end;

[0055] S240, demodulating and filtering the speed pulse signal to obtain each oscillation mode signal and provide a trend signal;

[0056] S250, judging the switch quantity information of the unit and giving a trend signal;

[0057] S260, processing the three-phase current and the three-phase voltage to obtain power, further judging the power and providing a trend signal;

[0058] S270, according to the trend signal of the oscillation mode signal, the trend signal of the switch signal, and the trend signal of the power, the secondary sides of the steam turbine generator set, the generator set and the pressure plate, the current transformer, and the voltage transformer are cut off respectively.

[0059] The protection method of this embodiment can perform the removal function on different units according to different collected data, support the function of coordinated removal, and meet the needs of optimized removal.

[0060] Furthermore, the protection method of this embodiment also includes: determining whether the protection device is powered off, and keeping the protection device closed in the event of a power failure. In other words, the power failure signal can be directly sent to the central processing module to ensure that the protection device can keep the signal closed even when the power is lost, providing a basis for accident recall.

[0061] Furthermore, the protection method of this embodiment also includes: judging whether the protection device can communicate or collect signals normally, and issuing a warning signal when it cannot communicate or collect signals normally.

[0062] like Figure 4 As shown, another aspect of the present disclosure provides an electronic device, comprising: one or more processors; a memory for storing one or more programs, which, when executed by the one or more processors, enables the one or more processors to implement the protection method described above.

[0063] like Figure 4 As shown, the electronic device 300 includes one or more processors 310, one or more memories 320, input devices, output devices, etc. These components are interconnected through a bus system and / or other forms of connection mechanisms. It should be noted that Figure 4 The components and structures of the electronic device shown are merely exemplary and non-limiting. The electronic device may also have other components and structures as required.

[0064] The processor may be a central processing unit (CPU) or other forms of processing units having data processing capabilities and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.

[0065] The memory may include one or more computer program products, and the computer program product may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory (cache), etc. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor may run the program instructions to implement the client functions (implemented by the processor) and / or other desired functions in the embodiments of the present disclosure described below. Various applications and various data may also be stored in the computer-readable storage medium, for example, various data used and / or generated by the application, etc.

[0066] Another aspect of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program can implement the protection method given above when executed by a processor.

[0067] The computer-readable medium may be included in the apparatus, device, or system of the present disclosure, or may exist independently.

[0068] Among them, computer-readable storage media can be any tangible media that contains or stores a program, which can be an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or equipment. More specific examples include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, an optical fiber, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0069] The computer-readable storage medium may also include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code, specific examples of which include but are not limited to electromagnetic signals, optical signals, or any suitable combination thereof.

[0070] The present disclosure provides a steam turbine generator shaft system torsional vibration protection device and method, electronic equipment and storage medium, which have the following beneficial effects compared with the prior art:

[0071] First, the protection device disclosed in the present invention can support the function of coordinated removal and provide a corresponding coordinated machine cutting function interface to meet the needs of optimized removal, so as to solve the current problem of simultaneous removal of multiple units;

[0072] Second, the present disclosure is connected to the industrial computer through the central processing module, which can support the storage of a large number of recorded wave data, providing support for further data analysis. At the same time, the device has an interface for coordinated machine cutting, that is, the device defines a switch output node for trend judgment on the basis of the traditional divergent protection criterion and fatigue protection action criterion of torsional vibration protection. Compared with the existing protection device, it not only outputs action information, but also provides trend information after the action, providing a reasonable basis for further protection action behavior, thereby avoiding the occurrence of excessive cutting of units when subsynchronous resonance occurs, and reducing the impact on the system to a minimum;

[0073] Third, the protection device design disclosed in the present invention provides trend information output of the torsional vibration signal of the unit, provides an interface for coordinated machine cutting, and further provides a complete type of action contacts, which can not only meet the needs of signal monitoring, but also ensure reliable action.

[0074] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A torsional vibration protection device for a steam turbine generator set shaft system, characterized in that: include: The speed pulse signal acquisition module is used to collect the speed pulse signals of the head and tail of the steam turbine generator set; Switching quantity input module, used to collect switching quantity information of generator sets and pressure plates; AC signal sampling module, used to collect three-phase current and three-phase voltage at the generator end; The central processing module is used to demodulate and filter the speed pulse signal, obtain various oscillation mode signals and give trend signals; it is also used to judge the switch quantity information of the unit and give trend signals; it is also used to process the three-phase current and three-phase voltage to obtain power, further judge the power and give trend signals; The tripping module is used to cut off the secondary sides of the steam turbine generator set, the generator set and the pressure plate, the current transformer and the voltage transformer respectively according to the trend signal of the oscillation mode signal, the trend signal of the switch signal and the trend signal of the power.

2. The steam turbine generator shaft torsional vibration protection device according to claim 1, characterized in that: The protection device further comprises two power supply modules of redundant design, and the power supply modules are electrically connected to the protection device.

3. The steam turbine generator shaft torsional vibration protection device according to claim 2, characterized in that: The protection device also includes a power-off self-holding open inertia output module, which is electrically connected to the power supply module and the central processing module respectively; wherein, The power-off self-holding open inertia output module is used to determine whether the power module is powered off, and to keep the device closed when the power is off.

4. The steam turbine generator shaft torsional vibration protection device according to claim 1, characterized in that: The protection device also includes a common switch output module, which is electrically connected to the protection device and is used to determine whether the protection device can communicate or collect signals normally, and to send a warning signal when it cannot communicate or collect signals normally.

5. The steam turbine generator shaft torsional vibration protection device according to claim 1, characterized in that: The central processing module is also connected to the terminal via a communication method to output various trend signals.

6. A method for protecting the shaft system of a steam turbine generator set from torsional vibration, characterized in that: The protection method comprises: Collect the speed pulse signals of the head and tail of the steam turbine generator set; Collect switch quantity information of generator sets and pressure plates; Collect the three-phase current and three-phase voltage at the generator end; Demodulating and filtering the speed pulse signal to obtain each oscillation mode signal and provide a trend signal; Judge the switch quantity information of the unit and give trend signals; Process the three-phase current and three-phase voltage to obtain power, further judge the power and give trend signals; According to the trend signal of the oscillation mode signal, the trend signal of the switch quantity signal and the trend signal of the power, the secondary sides of the steam turbine generator set, the generator set and the pressure plate, the current transformer and the voltage transformer are cut off respectively.

7. The method for protecting the shaft system of a steam turbine generator set from torsional vibration according to claim 6, characterized in that: The protection method comprises: Determine whether the protection device is powered off, and keep the protection device signal closed in the event of a power outage.

8. The method for protecting the shaft system of a steam turbine generator set from torsional vibration according to claim 6, characterized in that: The protection method further comprises: Determine whether the protection device can communicate or collect signals normally, and send a warning signal when it cannot communicate or collect signals normally.

9. An electronic device, characterized in that: include: one or more processors; A memory for storing one or more programs, which, when executed by the one or more processors, enables the one or more processors to implement the protection method according to any one of claims 6 to 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it can implement the protection method according to any one of claims 6 to 8.

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