A steam turbine fault positioning method, device, equipment and storage medium

Abstract

The application discloses a steam turbine fault positioning method, device and equipment and a storage medium, and is applied to the field of fault analysis.The method comprises the following steps: collecting current change time data of a servo card output end, a servo valve receiving end, an adjusting valve position feedback output end and a servo card position feedback receiving end; determining an adjusting valve swing reason according to the current change time data; and when it is judged that the adjusting valve swing reason is a fault swing, positioning a steam turbine fault through the time sequence of the current change time data.The method collects the time data of current change to determine the adjusting valve swing reason, and when it is judged that the adjusting valve swing reason is a fault swing, the time sequence of the current change time data is used to determine the steam turbine fault position, so that the problem that a long time is consumed and a large amount of work is required for analyzing reasons in the prior art is avoided when the steam turbine fault position is determined by manually excluding swing reasons one by one.

Description

Technical Field

[0001] This invention relates to the field of fault analysis, and in particular to a method, apparatus, equipment and storage medium for locating faults in steam turbines. Background Technology

[0002] Steam turbines in thermal power generating units are mainly divided into two types: generator turbines and feedwater pump turbines. During daily operation, the regulating valves of the turbine control equipment often oscillate, causing changes in turbine speed or work capacity, threatening the safe operation of the unit. In severe cases, this can lead to abnormal unit shutdown or equipment damage. Therefore, it is crucial to analyze and address the causes of the regulating valve oscillations to ensure controllable valve opening and stable turbine operation. Current technology involves manually replacing suspected faulty servo cards, signal lines, and other equipment one by one to eliminate the cause of the oscillations and pinpoint the turbine fault location. This method is time-consuming, inefficient, and labor-intensive. Summary of the Invention

[0003] The purpose of this invention is to provide a method, device, equipment, and storage medium for locating turbine faults, which is applied in the field of fault analysis. This method determines the cause of the control valve swing by collecting time data of current changes. When the cause of the control valve swing is determined to be fault swing, the turbine fault location is determined by the time sequence of the current change time data. This avoids the problem of long analysis time and large workload caused by manually eliminating swing causes one by one to determine the turbine fault location in the prior art.

[0004] To solve the above-mentioned technical problems, the present invention provides a method for locating turbine faults, comprising:

[0005] Collect current change time data from the servo card output terminal, servo valve receiver terminal, regulating valve position feedback output terminal, and servo card position feedback receiver terminal;

[0006] The cause of the regulating valve oscillation is determined based on the current change time data.

[0007] When it is determined that the cause of the regulating valve swing is fault swing, the turbine fault location is performed by using the timing of the current change time data.

[0008] Optionally, determining the cause of the regulating valve oscillation based on the current change time data includes:

[0009] Determine whether the rate of change of the current change time data at the output terminal of the servo card is less than the preset output change rate, or whether the timing sequence of the current change time data after the servo card receives the running command is the servo card output terminal, the servo valve receiving terminal, the regulating valve position feedback output terminal, and the servo card position feedback receiving terminal.

[0010] If so, determine that the reason for the valve swing is normal swing;

[0011] If not, the cause of the valve swing is determined to be abnormal swing.

[0012] Optionally, the step of locating turbine faults using the timing of the current change time data includes:

[0013] When the servo card does not receive a command but the current change time data at the output of the servo card changes first, the servo card is determined to be faulty.

[0014] When the current change time data at the receiver of the servo valve changes first, a fault in the command signal line is determined.

[0015] When the current change time data at the position feedback output of the regulating valve changes first, the servo card is determined to be faulty.

[0016] When the current change time data of the servo card position feedback receiver changes first, a position feedback signal line fault is determined.

[0017] Optional, also includes:

[0018] When an abnormal swing command is received, a bias voltage is supplied to the servo valve to keep the regulating valve in a constant position.

[0019] Optionally, the current change time data collected from the servo card output terminal, servo valve receiver terminal, regulating valve position feedback output terminal, and servo card position feedback receiver terminal includes:

[0020] A first monitoring point is set at the output end of the servo card, and the first current change time data of the first monitoring point is recorded by a first oscilloscope.

[0021] A second monitoring point is set at the receiving end of the servo valve, and the time data of the second current change at the second monitoring point is recorded by a second oscilloscope.

[0022] A third monitoring point is set at the position feedback output terminal of the regulating valve, and the time data of the third current change at the third monitoring point is recorded by a third oscilloscope.

[0023] A fourth monitoring point is set at the position feedback receiver of the servo card, and the time data of the fourth current change at the fourth monitoring point is recorded by a fourth oscilloscope.

[0024] Optional, also includes:

[0025] The reason for the valve swing is sent to the display device for display.

[0026] Optional, also includes:

[0027] The current change time data and the reason for the valve swing are stored in the local database.

[0028] To solve the above-mentioned technical problems, the present invention provides a turbine fault location device, comprising:

[0029] The data acquisition module is used to acquire the current change time data from the servo card output terminal, the servo valve receiver terminal, the regulating valve position feedback output terminal, and the servo card position feedback receiver terminal.

[0030] The swing cause determination module is used to determine the cause of the control valve swing based on the current change time data.

[0031] The fault location module is used to locate the turbine fault by using the timing of the current change time data when it is determined that the cause of the swing of the regulating valve is a fault swing.

[0032] To solve the above-mentioned technical problems, the present invention provides a turbine fault location device, comprising:

[0033] Memory, used to store computer programs;

[0034] A processor is used to implement any one of the turbine fault location methods when executing the computer program.

[0035] To solve the above-mentioned technical problems, the present invention provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement any of the turbine fault location methods described above.

[0036] As can be seen, the method of the present invention determines the cause of the control valve swing by collecting time data of current change. When the cause of the control valve swing is determined to be fault swing, the turbine fault location is determined by the time sequence of current change time data. This avoids the problem of long analysis time and large workload caused by manually eliminating swing causes one by one to determine the turbine fault location in the prior art. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0038] Figure 1 A flowchart of a turbine fault location method provided in an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of a steam turbine structure provided in an embodiment of the present invention;

[0040] Figure 3 This is a structural block diagram of a turbine fault location device provided in an embodiment of the present invention. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Steam turbines in thermal power generating units are mainly divided into two types: generator turbines and feedwater pump turbines. The turbine speed is controlled by the turbine regulating valve, which is an important piece of equipment for controlling turbine operation. During normal operation of the unit, operators or the control system control the opening of the regulating valve by increasing or decreasing the regulating valve command, thereby increasing or decreasing the turbine speed or work capacity.

[0043] During routine operation, technicians encounter issues where the turbine regulating valve swings up and down for unknown reasons. This swinging causes fluctuations in parameters such as the generator turbine load, main steam pressure, and feedwater pump turbine flow rate, threatening the safe operation of the unit. Currently, technicians can only eliminate possibilities one by one, increasing workload and time, hindering timely problem-solving and stabilizing unit operating parameters.

[0044] The following combination Figure 1 , Figure 1 A flowchart of a turbine fault location method provided in an embodiment of the present invention is shown. The method may include:

[0045] S101: Collects current change time data from the servo card output, servo valve receiver, regulating valve position feedback output, and servo card position feedback receiver.

[0046] The structure of a steam turbine can be as follows Figure 2 As shown, the steam turbine may include a servo card, a servo valve, and a regulating valve. Under normal operating conditions, the servo card can send control voltage commands to the servo valve to control the servo valve. The servo valve controls the regulating valve through hydraulic actuation. The regulating valve feeds back the regulating valve voltage position to the servo card. The servo card then issues a new voltage command based on the feedback information to complete the operation of the entire circuit.

[0047] Generally, when a device receives or sends a signal, the current at its receiving or sending end will change. In this embodiment, the current change time data at various positions of the steam turbine is recorded to analyze the cause of the regulating valve swing and the specific fault location of the steam turbine.

[0048] In this embodiment, the current change time data can refer to the time data and current change data of the current change occurring at the corresponding location. This embodiment does not limit the specific content of the current change data, which can be current, voltage, frequency, or other data.

[0049] In this embodiment, current change time data can be collected from the servo card output terminal, the servo valve receiver terminal, the regulating valve position feedback output terminal, and the servo card position feedback receiver terminal. This embodiment does not limit the specific method of collecting the current change time data. Generally, a first monitoring point is set at the servo card output terminal, and the first current change time data of the first monitoring point is recorded using a first oscilloscope; a second monitoring point is set at the servo valve receiver terminal, and the second current change time data of the second monitoring point is recorded using a second oscilloscope; a third monitoring point is set at the regulating valve position feedback output terminal, and the third current change time data of the third monitoring point is recorded using a third oscilloscope; a fourth monitoring point is set at the servo card position feedback receiver terminal, and the fourth current change time data of the fourth monitoring point is recorded using a fourth oscilloscope. This embodiment does not limit the specific setting of the monitoring points, nor does it limit the specific method of collecting the current change time data using an oscilloscope.

[0050] This embodiment can also collect the current change time data of each monitoring point through multiple channels of an oscilloscope. For example, the first current change time data of the first monitoring point can be collected through the first channel of the oscilloscope, the second current change time data of the first monitoring point can be collected through the second channel of the oscilloscope, the third current change time data of the third monitoring point can be collected through the third channel of the oscilloscope, and the fourth current change time data of the fourth monitoring point can be collected through the fourth channel of the oscilloscope.

[0051] S102: Determine the cause of the regulating valve oscillation based on the current change time data.

[0052] In this embodiment, the cause of the regulating valve's oscillation can be determined based on the collected current change time data.

[0053] Generally, the oscillation of the control valve is not always caused by a turbine malfunction. It can also occur during normal turbine operation. In this embodiment, the cause of the oscillation can be analyzed based on the current change time data collected from each monitoring point. This embodiment does not limit the specific analysis method. Generally, it can be analyzed by comparing the timing of current changes at the servo card output end, servo valve receiver end, control valve position feedback output end, and servo card position feedback receiver end. In this embodiment, the timing refers to the order in which the current data at each end changes.

[0054] Generally, the reasons for normal valve oscillation can be divided into the following two types: (1) The servo card receives the running command, and the timing sequence of the current change time data is servo card output, servo valve receiving, valve position feedback output, and servo card position feedback receiving; (2) The rate of change of the current change time data at the servo card output is less than the preset output rate of change. Apart from these two normal reasons for valve oscillation, all other valve oscillations can be considered as caused by abnormal malfunctions.

[0055] This embodiment can determine whether the rate of change of the current change time data at the servo card output terminal is less than the preset output change rate, or whether the timing sequence of the current change time data after the servo card receives the run command is the servo card output terminal, servo valve receiver terminal, regulating valve position feedback output terminal, and servo card position feedback receiver terminal. If yes, the reason for the regulating valve swing is determined to be normal swing; if no, the reason for the regulating valve swing is determined to be abnormal swing. When the timing sequence of the current change at each terminal meets any one of these conditions or meets both conditions simultaneously, the regulating valve can be considered to be operating normally. Otherwise, the regulating valve is considered to be operating abnormally.

[0056] S103: When the cause of the regulating valve swing is determined to be fault swing, the turbine fault location is performed by using the timing data of the current change time.

[0057] In this embodiment, when the cause of the regulating valve swing is determined to be fault swing, the turbine fault location can be performed by using the timing of the current change time data.

[0058] The common causes of turbine control valve oscillation (excluding configuration logic reasons) are as follows: Servo card malfunction: The turbine control valve voltage signal is issued by the servo card. When the servo card malfunctions, it will cause the control valve to oscillate or operate abnormally. Interference with the control valve command signal or position feedback signal: When the command signal line or feedback signal line has poor shielding and grounding, or when other high-power electrical equipment starts or other interference sources send signals, it will cause fluctuations in the command signal or feedback signal, thus causing the turbine control valve to oscillate. Servo valve malfunction: The servo card command voltage signal drives the control valve to operate through the servo valve signal line. When the servo valve oil hole is blocked, it will cause the servo valve to operate abnormally, thus causing the turbine control valve to oscillate.

[0059] This embodiment can locate the fault location based on the time sequence of current change data collected from each monitoring point. This embodiment does not limit the specific method of fault location, and generally, except for normal operation:

[0060] If the servo card does not receive a command but the current change time data at the servo card output terminal changes first, the servo card is identified as faulty.

[0061] When the current change time data at the servo valve receiver changes first, a fault in the command signal line is determined.

[0062] When the current change time data at the control valve position feedback output terminal changes first, a servo card fault is determined.

[0063] When the current change time data at the servo card position feedback receiver changes first, a position feedback signal line fault is identified.

[0064] In this embodiment, when it is determined that the control valve is oscillating due to a fault, a bias voltage can be supplied to the servo valve to keep the control valve in place and prevent further deterioration of the turbine's operating condition. This embodiment does not limit the specific method of supplying the bias voltage; it can be supplied based on a preset voltage or through automatic detection and voltage regulation. This embodiment can generate an oscillation anomaly command when a control valve fault is determined. Upon receiving the oscillation anomaly command, the voltage supply device can be controlled to supply the bias voltage. The purpose of supplying the bias voltage in this embodiment is to avoid repeated adjustments to the entire control loop due to the fault, which would cause timing analysis chaos. By using the bias voltage, manual intervention in the loop is provided for fault analysis, offering a more effective solution for emergency handling and reproducing accident phenomena.

[0065] In this embodiment, after analyzing the cause of the control valve swing, the cause of the swing can be displayed on a display device. After fault location is performed, the fault location information can also be displayed on a display device to facilitate technical personnel in handling the problem.

[0066] In this embodiment, the collected current change time data, swing cause analysis results, and fault location results can also be stored to facilitate subsequent statistical analysis by staff.

[0067] This embodiment determines the cause of the control valve swing by collecting time data of current changes. When the cause of the control valve swing is determined to be fault swing, the turbine fault location is determined by the time sequence of the current change time data. This avoids the problem of long analysis time and large workload caused by manually eliminating swing causes one by one to determine the turbine fault location in the prior art.

[0068] The following is a specific embodiment of a turbine fault location method provided by the present invention, which may include:

[0069] A first monitoring point is set at the output of the servo card, and the first current change time data of the first monitoring point is recorded using a first oscilloscope.

[0070] A second monitoring point is set at the receiver of the servo valve, and the time data of the second current change at the second monitoring point is recorded by a second oscilloscope.

[0071] A third monitoring point is set at the position feedback output of the regulating valve, and the time data of the third current change at the third monitoring point is recorded by a third oscilloscope.

[0072] A fourth monitoring point is set at the servo card position feedback receiver, and the time data of the fourth current change at the fourth monitoring point is recorded using a fourth oscilloscope.

[0073] Determine whether the rate of change of the current change time data at the first monitoring point is less than the preset output rate of change, or whether the timing sequence of the current change time data after the servo card receives the running command is the first monitoring point, the second monitoring point, the third monitoring point, and the fourth monitoring point.

[0074] If so, determine that the valve swing is due to normal swing.

[0075] If not, the cause of the control valve's oscillation is determined to be abnormal oscillation.

[0076] When the cause of the control valve's oscillation is determined to be abnormal oscillation...

[0077] When the servo card does not receive a command but the current change time data of the first monitoring point changes first, the servo card is identified as faulty.

[0078] When the current change time data at the second monitoring point changes first, a fault in the command signal line is determined.

[0079] When the current change time data at the third monitoring point changes first, a servo card fault is determined.

[0080] When the current change time data at the fourth monitoring point changes first, a fault in the position feedback signal line is determined.

[0081] The following combination Figure 3 , Figure 3 This is a structural block diagram of a turbine fault location device provided in an embodiment of the present invention. The device may include:

[0082] The data acquisition module 100 is used to acquire the current change time data of the servo card output terminal, the servo valve receiver terminal, the regulating valve position feedback output terminal and the servo card position feedback receiver terminal;

[0083] The swing cause determination module 200 is used to determine the swing cause of the regulating valve based on the current change time data.

[0084] The fault location module 300 is used to locate the turbine fault by using the timing of the current change time data when it is determined that the cause of the swing of the regulating valve is fault swing.

[0085] Based on the above embodiments, the present invention determines the cause of the control valve swing by collecting time data of current change. When it is determined that the cause of the control valve swing is fault swing, the turbine fault location is determined by the time sequence of the current change time data. This avoids the problem of long analysis time and large workload caused by manually eliminating swing causes one by one to determine the turbine fault location in the prior art.

[0086] Based on the above embodiments, the swing cause determination module 200 may include:

[0087] The first judgment unit is used to determine whether the rate of change of the current change time data at the output end of the servo card is less than the preset output change rate, or whether the timing sequence of the current change time data after the servo card receives the run command is the servo card output end, the servo valve receiving end, the regulating valve position feedback output end, and the servo card position feedback receiving end; if yes, execute the first execution unit; if no, execute the second execution unit.

[0088] The first execution unit is used to determine that the reason for the swing of the regulating valve is normal swing;

[0089] The second execution unit is used to determine that the cause of the swing of the regulating valve is abnormal swing.

[0090] Based on the above embodiments, the fault location module 300 may include:

[0091] The first positioning unit is used to determine that the servo card is faulty when the servo card does not receive an instruction but the current change time data at the output terminal of the servo card changes first.

[0092] The second positioning unit is used to determine that the command signal line is faulty when the current change time data at the receiving end of the servo valve changes first.

[0093] The third positioning unit is used to determine that the servo card is faulty when the current change time data at the position feedback output terminal of the regulating valve changes first.

[0094] The fourth positioning unit is used to determine that the position feedback signal line is faulty when the current change time data of the position feedback receiver of the servo card changes first.

[0095] Based on the above embodiments, the device may further include:

[0096] The voltage regulator module supplies bias voltage to the servo valve when an abnormal swing command is received, so that the regulating valve can maintain its position.

[0097] Based on the above embodiments, the data acquisition module 100 includes:

[0098] The first acquisition unit is used to set a first monitoring point at the output end of the servo card and record the first current change time data of the first monitoring point through a first oscilloscope.

[0099] The second acquisition unit is used to set a second monitoring point at the receiving end of the servo valve and record the second current change time data of the second monitoring point through a second oscilloscope.

[0100] The third acquisition unit is used to set a third monitoring point at the position feedback output terminal of the regulating valve and record the third current change time data of the third monitoring point through a third oscilloscope.

[0101] The fourth acquisition unit is used to set a fourth monitoring point at the position feedback receiver of the servo card and record the fourth current change time data of the fourth monitoring point through a fourth oscilloscope.

[0102] Based on the above embodiments, the device may further include:

[0103] The display module is used to send the reason for the swing of the regulating valve to the display device for display.

[0104] Based on the above embodiments, the device may further include:

[0105] The storage module is used to store the current change time data and the reason for the swing of the regulating valve to a local database.

[0106] Based on the above embodiments, the present invention also provides a turbine fault location device. This device may include a memory and a processor. The memory stores a computer program, and when the processor calls the computer program in the memory, it can implement the steps provided in the above embodiments. Of course, the device may also include various necessary network interfaces, power supplies, and other components.

[0107] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by an execution terminal or processor, can implement the method provided in the embodiments of the present invention; the storage medium may include various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0108] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0109] The present invention provides a detailed description of a turbine fault location method, apparatus, device, and storage medium. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, those skilled in the art will recognize that there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for locating turbine faults, characterized in that, include: Collect current change time data from the servo card output terminal, servo valve receiver terminal, regulating valve position feedback output terminal, and servo card position feedback receiver terminal; Determining the cause of the regulating valve oscillation based on the current change time data includes: determining whether the rate of change of the current change time data at the servo card output is less than a preset output rate of change, or whether the timing sequence of the current change time data after the servo card receives the run command is the servo card output, the servo valve receiver, the regulating valve position feedback output, and the servo card position feedback receiver; if yes, the cause of the regulating valve oscillation is determined to be normal oscillation; if no, the cause of the regulating valve oscillation is determined to be abnormal oscillation. When the cause of the regulating valve swing is determined to be faulty swing, turbine fault location is performed by using the timing of the current change time data; including: when the servo card does not receive a command but the current change time data at the output end of the servo card changes first, the servo card is determined to be faulty; when the current change time data at the receiving end of the servo valve changes first, the command signal line is determined to be faulty; when the current change time data at the position feedback output end of the regulating valve changes first, the servo card is determined to be faulty; when the current change time data at the position feedback receiving end of the servo card changes first, the position feedback signal line is determined to be faulty.

2. The turbine fault location method according to claim 1, characterized in that, Also includes: When an abnormal swing command is received, a bias voltage is supplied to the servo valve to keep the regulating valve in a constant position.

3. The turbine fault location method according to claim 1, characterized in that, The current change time data collected from the servo card output terminal, servo valve receiver terminal, regulating valve position feedback output terminal, and servo card position feedback receiver terminal include: A first monitoring point is set at the output end of the servo card, and the first current change time data of the first monitoring point is recorded by a first oscilloscope. A second monitoring point is set at the receiving end of the servo valve, and the time data of the second current change at the second monitoring point is recorded by a second oscilloscope. A third monitoring point is set at the position feedback output terminal of the regulating valve, and the time data of the third current change at the third monitoring point is recorded by a third oscilloscope. A fourth monitoring point is set at the position feedback receiver of the servo card, and the time data of the fourth current change at the fourth monitoring point is recorded by a fourth oscilloscope.

4. The turbine fault location method according to claim 1, characterized in that, Also includes: The reason for the valve swing is sent to the display device for display.

5. The turbine fault location method according to claim 1, characterized in that, Also includes: The current change time data and the reason for the valve swing are stored in the local database.

6. A turbine fault location device, characterized in that, include: The data acquisition module is used to acquire the current change time data from the servo card output terminal, the servo valve receiver terminal, the regulating valve position feedback output terminal, and the servo card position feedback receiver terminal. The swing cause determination module is used to determine the cause of the control valve swing based on the current change time data; including: determining whether the rate of change of the current change time data at the output of the servo card is less than a preset output change rate, or whether the timing sequence of the current change time data after the servo card receives the run command is the servo card output, the servo valve receiver, the control valve position feedback output, and the servo card position feedback receiver; if yes, the cause of the control valve swing is determined to be normal swing; if no, the cause of the control valve swing is determined to be abnormal swing. The fault location module is used to locate the turbine fault by using the timing of the current change time data when the cause of the control valve swing is determined to be faulty swing. This includes: determining a servo card fault when the servo card does not receive a command but the current change time data at the servo card output terminal changes first; determining a command signal line fault when the current change time data at the servo valve receiving terminal changes first; determining a servo card fault when the current change time data at the control valve position feedback output terminal changes first; and determining a position feedback signal line fault when the current change time data at the servo card position feedback receiving terminal changes first.

7. A turbine fault location device, characterized in that, include: Memory, used to store computer programs; A processor is configured to implement the turbine fault location method as described in any one of claims 1 to 5 when executing the computer program.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, implement the turbine fault location method as described in any one of claims 1 to 5.

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