CN112881906B - Fault judgment method and device and control terminal - Google Patents
Fault judgment method and device and control terminal Download PDFInfo
- Publication number
- CN112881906B CN112881906B CN202110004965.8A CN202110004965A CN112881906B CN 112881906 B CN112881906 B CN 112881906B CN 202110004965 A CN202110004965 A CN 202110004965A CN 112881906 B CN112881906 B CN 112881906B
- Authority
- CN
- China
- Prior art keywords
- voltage
- terminal voltage
- machine terminal
- machine
- excitation system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The application discloses a fault judgment method, a fault judgment device and a control terminal, and relates to the technical field of excitation systems. The method comprises the following steps: acquiring a first machine terminal voltage which is the voltage of a first channel in an operating state in a target machine set; determining whether a PT slow fusing fault exists according to the first machine terminal voltage and a preset voltage; wherein the predetermined voltage includes a second terminal voltage of a second channel in the target unit, and/or a synchronous voltage of the excitation system.
Description
Technical Field
The present application relates to the field of excitation system technologies, and in particular, to a fault determination method, an apparatus, and a control terminal.
Background
An excitation system in the generator bears the important responsibilities of regulating the voltage of the generator, reasonably distributing reactive power and ensuring the stability and full generation of the generator, and plays an important role in transient stability, dynamic stability and static stability of a power system in the generator.
However, in the operation process of the generator set, if a Potential Transformer (PT) fuse of a generator end channel is subjected to slow fusing and is not identified quickly, the excitation system may not be capable of switching the standby channel quickly, so that problems such as false forced excitation, rotor overcurrent protection, abnormal shutdown of the generator set and the like may occur.
Disclosure of Invention
The main purpose of the present application is to provide a fault determination method, device and control terminal, which can realize rapid identification of PT slow fusing fault, ensure that an excitation system can perform rapid switching of a standby channel, and avoid the problems of false forced excitation, rotor overcurrent protection, abnormal shutdown of a unit, and the like.
In a first aspect, an embodiment of the present application provides a fault determination method, where the method includes: acquiring a first machine terminal voltage which is the voltage of a first channel in an operating state in a target machine set; determining whether a voltage transformer PT slow-melting fault exists according to the first machine terminal voltage and a preset voltage; wherein the predetermined voltage includes a second terminal voltage of a second channel in the target unit, and/or a synchronous voltage of the excitation system.
In one or more embodiments of the present application, in a case where the predetermined voltage includes a second terminal voltage, determining whether a PT slow fusing fault exists according to the first terminal voltage and the predetermined voltage includes: and determining that the PT slow fusing fault exists under the condition that the first machine terminal voltage is smaller than the second machine terminal voltage and the difference value of the first machine terminal voltage and the second machine terminal voltage is larger than a first deviation threshold value.
In one or more embodiments of the present application, in a case that the predetermined voltage further includes a synchronous voltage of the excitation system, before determining that the PT slow fusing fault exists, determining whether the PT slow fusing fault exists according to the first machine terminal voltage and the predetermined voltage, further includes: and judging whether the first machine terminal voltage is smaller than the synchronous voltage of the excitation system or not and whether the difference value of the first machine terminal voltage and the synchronous voltage of the excitation system is not larger than a second deviation threshold or not, and executing the PT slow fusing fault determination under the condition that the first machine terminal voltage is smaller than the synchronous voltage of the excitation system and the difference value of the first machine terminal voltage and the synchronous voltage of the excitation system is not larger than the second deviation threshold.
In one or more embodiments of the present application, after determining whether there is a PT slow fusing fault according to the first machine terminal voltage and a predetermined voltage, the method further includes: and under the condition that the PT slow melting fault exists, switching to a first mode, and controlling the target unit to be switched from a first channel to a second channel.
In one or more embodiments of the present application, a first event and a second event are separated by a preset duration, where the first event is the determination that the PT slow fusing fault exists, and the second event is the switching to the first mode.
In one or more embodiments of the present application, after the switching to the first mode, the method further includes: acquiring a third generator terminal voltage, wherein the third generator terminal voltage is the voltage of a second channel in an operating state in the target unit; and determining whether the PT slow-melting fault exists according to the voltage at the third terminal and the synchronous voltage of the excitation system.
In one or more embodiments of the present application, after determining whether there is a PT slow fusing fault according to the voltage at the third terminal and the synchronous voltage of the excitation system, the method further includes: switching to a second mode in the presence of a PT slow fuse fault; and acquiring and outputting the excitation current of the excitation system, the voltage at the third generator terminal and the working mode of the target unit.
In a second aspect, an embodiment of the present application provides a fault determination device, where the device includes: the acquisition module is used for acquiring a first machine terminal voltage, wherein the first machine terminal voltage is the voltage of a first channel in an operating state in a target machine set; the determining module is used for determining whether a voltage transformer PT slow-melting fault exists according to the first machine terminal voltage and a preset voltage; the preset voltage comprises a second generator terminal voltage of a second channel in the target unit and/or a synchronous voltage of the excitation system.
In a third aspect, an embodiment of the present application further provides a control terminal, including a processor, a memory, and a program or an instruction stored in the memory and executable on the processor, where the program or the instruction, when executed by the processor, implements the steps of the method of the first aspect.
In a fourth aspect, embodiments of the present application further provide a computer-readable storage medium, on which a program or instructions are stored, which when executed by a processor implement the steps of the method according to the first aspect.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
in the embodiment of the application, an excitation system acquires a first machine terminal voltage, wherein the first machine terminal voltage is the voltage of a first channel in an operating state in a target machine set; determining whether a voltage transformer PT slow melting fault exists according to the first machine terminal voltage and a preset voltage; the preset voltage comprises a second machine end voltage of a second channel in the target unit and/or a synchronous voltage of the excitation system, so that the excitation system can realize quick identification of PT slow melting faults, quick switching of a standby channel is ensured, and the problems of mistaken forced excitation, rotor overcurrent protection, abnormal unit shutdown and the like are avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic flowchart of a fault determination method according to an exemplary embodiment of the present application.
Fig. 2a is a schematic flowchart of a fault determination method according to another exemplary embodiment of the present application.
Fig. 2b is a schematic diagram of a fault discrimination logic provided in accordance with another exemplary embodiment of the present application.
Fig. 3 is a block diagram of a fault determination apparatus provided according to an exemplary embodiment of the present application.
Fig. 4 is a block diagram of a control terminal provided according to an exemplary embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
The technical solution given in the present application is described below with reference to the accompanying drawings and embodiments.
As shown in fig. 1, a flow chart of a fault determination method provided in an exemplary embodiment of the present application is schematically illustrated, and the method may be applied to, but is not limited to, an excitation system, and may specifically be executed by hardware or/and software installed in the excitation system. The method comprises at least the following steps.
S110, acquiring a first machine terminal voltage.
The first terminal voltage is a terminal voltage of a first channel in an operating state in a target unit (such as a generator unit of a thermal power plant), and the terminal voltage refers to a terminal line voltage of the generator.
Specifically, the target unit may be configured with at least two channels, one being a current operating channel, such as the aforementioned first channel, and one being a standby channel of the current operating channel, such as a subsequent second channel. Under the condition, the excitation system can realize the switching of the operation channel of the target unit when the target unit generates PT slow melting fault, PT disconnection fault and the like so as to ensure the normal and stable operation of the target unit.
In one implementation, a dual-channel main control Board (COB) may be disposed in the excitation system, and the excitation system is connected to the two channels of the target unit through the dual-channel main control Board respectively, so as to collect a terminal voltage (such as the first terminal voltage) On the target unit (such as a generator), perform switching control On the channels of the target unit, and so On.
And S120, determining whether the PT slow fusing fault exists according to the first machine terminal voltage and a preset voltage.
Wherein the predetermined voltage includes a second terminal voltage of a second channel in the target unit, and/or a synchronous voltage of the excitation system. The synchronous voltage may refer to the excitation transformer low side synchronous line voltage,
it is understood that the second channel is used as a backup channel for the first channel, and the description of the second channel may refer to the description of S110, which is not repeated herein.
In the fault discrimination method provided by this embodiment, the excitation system determines whether a PT slow fusing fault exists according to the acquired first machine terminal voltage and the predetermined voltage, so as to quickly identify the PT slow fusing fault, ensure quick switching of a standby channel, and avoid the problems of false forced excitation, rotor overcurrent protection, abnormal shutdown of a unit, and the like.
As shown in fig. 2a, a flow chart of a fault determination method 200 provided in an exemplary embodiment of the present application is schematic, and the method may be applied to, but not limited to, an excitation system, and may be specifically executed by hardware or/and software installed in the excitation system. The method comprises at least the following steps.
S210, acquiring a first machine terminal voltage.
The specific implementation form of this step can refer to the description in S110, and this embodiment is not described herein again.
And S220, determining whether the PT slow fusing fault exists according to the first machine terminal voltage and the preset voltage.
In addition to the detailed description referring to the foregoing S110 and S120, as a possible implementation manner, in the case that the predetermined voltage includes a second terminal voltage, the implementation process of determining whether the PT slow fusing fault exists according to the first terminal voltage and the predetermined voltage in S220 may include: and determining that the PT slow-melting fault exists under the condition that the first machine terminal voltage is smaller than the second machine terminal voltage and the difference value between the first machine terminal voltage and the second machine terminal voltage is larger than a first deviation threshold value, otherwise, determining the type of the unit fault according to the actual condition.
The first deviation threshold may be set according to an actual requirement, for example, the first deviation threshold may be a tolerance between a voltage average value of the generator terminal line and a voltage average value of the excitation low-voltage side synchronous line, such as 3%, 5%, 15%, and the like, which is not limited in this embodiment.
In the implementation mode, the PT slow-melting fault can be accurately identified by comparing the first machine terminal voltage with the second machine terminal voltage, and the problems of protection misoperation, abnormal shutdown of a target machine set and the like are effectively avoided.
In another implementation manner, in order to further ensure the reliability of the PT slow fusing fault determination result, under the condition that the predetermined voltage further includes the second terminal voltage and the synchronization voltage, the implementation process of determining whether the PT slow fusing fault exists according to the first terminal voltage and the predetermined voltage in S220 may further include: and under the condition that the first machine end voltage is smaller than the second machine end voltage and the difference value of the first machine end voltage and the second machine end voltage is larger than a first deviation threshold value, further judging whether the first machine end voltage is smaller than the synchronous voltage of the excitation system or not and whether the difference value of the first machine end voltage and the second machine end voltage is not larger than a second deviation threshold value or not, and determining that the PT slow melting fault exists under the condition that the first machine end voltage is smaller than the synchronous voltage and the difference value of the first machine end voltage and the second machine end voltage is not larger than the second deviation threshold value.
It should be noted that the setting manner of the second deviation threshold is similar to the setting manner of the first deviation threshold, and this embodiment is not described again. In one implementation, the first deviation threshold and the second deviation threshold may be the same or different.
And S230, switching to a first mode and controlling the target unit to be switched from a first channel to a second channel under the condition that the PT slow melting fault exists.
Referring to fig. 2a, the first mode may be an automatic mode (AUTO FAULT), that is, the excitation system performs closed-loop control on the target unit according to the PT slow fusing determination result to ensure stable operation of the target unit, for example, obtains a first machine terminal voltage, and controls the target unit to switch from a first channel to a second channel when it is determined that a PT slow fusing FAULT exists according to the first machine terminal voltage.
It will be appreciated that when the excitation system is in the first mode, the control of the target unit by the excitation system is closed loop control, without manual intervention.
In one implementation, in order to avoid the false switching of the channel and perform the anti-jitter function, it is assumed that the first event is that the excitation system determines that a PT slow fusing fault exists, and the second event is that the switching is performed to the first mode. The first event and the second event may be separated by a preset time (e.g., 2 seconds, 5 seconds, etc.), wherein,
in other words, when the excitation system determines that the PT slow fusing fault exists, the problem of misjudgment of the current determination result is further determined by delaying the mode switching time, for example, waiting for a preset time period, and if after the preset time period, it is still determined that the PT slow fusing fault exists, switching to the first mode. For example, after the excitation system determines that the PT slow fusing fault exists, the excitation system waits for a preset time period such as 2 seconds, and then performs the step of switching to the first mode if it is determined that the PT slow fusing fault exists.
In one implementation, after controlling the target unit to switch from the first channel to the second channel, the excitation system may continue to acquire a terminal voltage of the currently operating channel, that is, a third terminal voltage of the second channel, to determine whether a PT slow fusing fault still exists after the channel switching. Referring again to fig. 2a, the process thereof will be described with reference to S240 and S250 shown in fig. 2 a.
S240, acquiring a third terminal voltage.
And the third terminal voltage is the voltage of a second channel in an operating state in the target unit. For a specific implementation form of S240, reference may be made to the description of the third terminal voltage in S120, that is, the third terminal voltage and the second terminal voltage may be the same.
And S250, determining whether the PT slow fusing fault exists according to the third generator terminal voltage and the synchronous voltage of the excitation system.
Optionally, the implementation process of S250 may include: and under the condition that the voltage at the third generator terminal is less than the synchronous voltage of the excitation system and the difference value of the voltage at the third generator terminal and the synchronous voltage of the excitation system is greater than a third deviation threshold value, judging that a PT slow fusing fault or a PT disconnection fault possibly exists.
In one implementation, in order to further ensure reliable operation of the excitation system and the target unit, in the case that S250 is completed and it is determined that there may be a PT slow fusing fault or a PT disconnection fault, the excitation system may include: switching to a second mode; and acquiring and outputting the excitation current of the excitation system, the voltage of a third generator terminal and the working mode of the target unit.
In one implementation, when the excitation system is in the second mode, manual intervention, such as increasing or decreasing the excitation current, manually checking the PT fault cause, and the like, is required according to the target unit operating state (i.e., the second mode) displayed by the excitation system, so as to ensure reliable operation of the unit.
In one implementation, when the excitation system is in the second mode, the fault discrimination logic corresponding to the second mode may use the existing PT disconnection operation logic, so that a worker may judge the actual conditions of PT disconnection and PT slow-fusing on site.
Based on the description of the foregoing method embodiments, as a possible implementation manner, the following briefly describes an implementation process of the fault determination method provided in the present application with reference to fig. 2 b.
It should be understood that P1 shown in fig. 2b is a logic control module, P2 is a hardware module, V1, V2, and V3 shown in P1 are a first terminal voltage and a second terminal voltage, D1 and D2 are a first deviation threshold and a second deviation threshold, A1 and A2 are difference logic operation modules, outputs of which are differences of two inputs, A3 and A4 are comparison logic operation modules, outputs of which are comparison results of two inputs, INV is a negation instruction, an excitation system is negated in the independent excitation mode, SHUNT is the self-SHUNT excitation mode, and EXCON is the excitation input.
In one implementation, after V1, V2, V3, D1, D2 are input to A1, A2, A3, A4, if the logically valid input of A3 or A4 is "1", its output is "1". When the output of the OR gate is 1, the EXCON is 1 and the SHUNT is 1, the AND gate outputs 1 to the user event module, and when the received input of the user event module is 1, the user event module judges that a PT slow fusing fault exists, switches to a first mode, and controls the target unit to be switched to a second channel from a first channel. In the fault judging method provided by the embodiment, the reliability and the accuracy of fault judgment can be further improved, and the rapidness, the accuracy, the reliability and the sensitivity of PT disconnection protection actions are ensured. In addition, the control logic related to the fault judgment method in each part has strong operability, is easy to realize, does not need cost, has obvious effect, can be implemented when the unit is stopped, improves the regulation and judgment performance of the core-excitation system of the power plant, reduces the accident rate, and improves the economic benefit.
In the foregoing fault determination method provided in the embodiment of the present application, the execution subject may be a fault determination device, or a control module for executing the fault determination method in the fault determination. In the following section, the fault determination device provided in the embodiment of the present application is described by taking the example of the fault determination method executed by the fault determination device.
As shown in fig. 3, a block diagram of a fault determination apparatus 300 according to an exemplary embodiment of the present application is provided, where the apparatus 300 includes an obtaining module 310, configured to obtain a first machine terminal voltage, where the first machine terminal voltage is a voltage of a first channel in an operating state in a target machine set; a determining module 320, configured to determine whether a PT slow fusing fault exists according to the first machine terminal voltage and a predetermined voltage; wherein the predetermined voltage includes a second terminal voltage of a second channel in the target unit, and/or a synchronous voltage of the excitation system.
The fault detection device 300 in the embodiment of the present application may be a device having an operating system. The operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, and embodiments of the present application are not limited specifically.
The fault determination device provided in the embodiment of the present application can implement each process implemented by the method embodiments of fig. 1 to fig. 2a, and achieve the same technical effect, and is not described herein again to avoid repetition.
As shown in fig. 4, a block diagram of a control terminal 10, which is applicable to an excitation system, is provided according to an exemplary embodiment of the present application. Optionally, the control terminal 40 may include at least a processor 41, a memory 42 for storing instructions executable by the processor 41. Wherein the processor 41 is configured to execute instructions to implement all or part of the steps of the fault discrimination method as in the above embodiments.
The processor 41 and the memory 42 are electrically connected directly or indirectly to realize data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines.
Wherein the processor 41 is adapted to read/write data or programs stored in the memory and to perform corresponding functions.
The memory 42 is used for storing programs or data, such as instructions executable by the processor 41. The Memory 42 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Read Only Memory (EPROM), an electrically Erasable Read Only Memory (EEPROM), and the like.
Further, as a possible implementation manner, the control terminal 40 may further include a power supply component, a multimedia component, an audio component, an input/output (I/O) interface, a sensor component, a communication component, and the like.
The power supply component provides power to the various components of the control terminal 40. The power components may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the control terminal 40.
The multimedia components include a screen providing an output interface between the control terminal 40 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component includes a front facing camera and/or a rear facing camera. When the control terminal 40 is in an operation mode, such as a photographing mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component is configured to output and/or input an audio signal. For example, the audio component includes a Microphone (MIC) configured to receive an external audio signal when the control terminal 40 is in an operation mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal may further be stored in the memory 42 or transmitted via the communication component. In some embodiments, the audio assembly further comprises a speaker for outputting audio signals.
The I/O interface provides an interface between the processing component and a peripheral interface module, which may be a keyboard, click wheel, button, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
The sensor assembly includes one or more sensors for providing various aspects of status assessment to the control terminal 40. For example, the sensor assembly may detect an open/closed state of the control terminal 40, the relative positioning of the components, such as a display and keypad of the control terminal 40, the sensor assembly may also detect a change in position of the control terminal 40 or a component of the control terminal 40, the presence or absence of user contact with the control terminal 40, orientation or acceleration/deceleration of the control terminal 40, and a change in temperature of the control terminal 40. The sensor assembly may include a proximity sensor configured to detect the presence of a nearby object in the absence of any physical contact. The sensor assembly may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly may further include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component is configured to facilitate wired or wireless communication between the control terminal 40 and other devices. The control terminal 40 may access a wireless network based on a communication standard, such as WiFi, an operator network (such as 2G, 3G, 4G, or 5G), or a combination thereof. In an exemplary embodiment, the communication component receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the control terminal 40 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
It should be understood that the structure shown in fig. 4 is only a schematic structure of the control terminal 40, and the control terminal 40 may include more or less components than those shown in fig. 4, or have a different configuration than that shown in fig. 4. The components shown in fig. 4 may be implemented in hardware, software, or a combination thereof.
In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as the memory 42 comprising instructions, executable by the processor 41 of the control terminal 40 to perform the fault discrimination method described above is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (8)
1. A method of fault discrimination, the method comprising:
acquiring a first machine terminal voltage which is the voltage of a first channel in an operating state in a target machine set;
determining whether a voltage transformer PT slow-melting fault exists according to the first machine terminal voltage and a preset voltage;
the preset voltage comprises a second generator terminal voltage of a second channel in the target unit and/or a synchronous voltage of an excitation system;
under the condition that the preset voltage comprises a second machine terminal voltage and a synchronous voltage of the excitation system, determining whether a PT slow fusing fault exists according to the first machine terminal voltage and the preset voltage, wherein the method comprises the following steps:
and under the condition that the first machine terminal voltage is smaller than the second machine terminal voltage and the difference value between the first machine terminal voltage and the second machine terminal voltage is larger than a first deviation threshold value, judging whether the first machine terminal voltage is smaller than the synchronous voltage of the excitation system or not and whether the difference value between the first machine terminal voltage and the second machine terminal voltage is not larger than a second deviation threshold value or not, and under the condition that the first machine terminal voltage is smaller than the synchronous voltage of the excitation system and the difference value between the first machine terminal voltage and the second machine terminal voltage is not larger than the second deviation threshold value, executing the PT slow melting fault determination.
2. The method of claim 1, wherein after determining whether a PT slow fuse fault exists based on the first machine terminal voltage and a predetermined voltage, the method further comprises:
and under the condition that the PT slow melting fault exists, switching to a first mode, and controlling the target unit to be switched from a first channel to a second channel.
3. The method of claim 2, wherein a first event is separated from a second event by a preset time, wherein the first event is the determination that the PT slow fuse fault exists, and wherein the second event is the switching to the first mode.
4. The method of claim 2, wherein after the switching to the first mode, the method further comprises:
acquiring a third generator terminal voltage, wherein the third generator terminal voltage is the voltage of a second channel in an operating state in the target unit;
and determining whether the PT slow fusing fault exists or not according to the third generator terminal voltage and the synchronous voltage of the excitation system.
5. The method of claim 4, wherein after determining whether there is a PT slow fusing fault based on the third machine side voltage and a synchronous voltage of an excitation system, the method further comprises:
switching to a second mode in the presence of a PT slow fuse fault;
and acquiring and outputting the excitation current of the excitation system, the voltage at the third generator terminal and the working mode of the target unit.
6. A fault discrimination apparatus, characterized in that the apparatus comprises:
the acquisition module is used for acquiring a first machine terminal voltage, wherein the first machine terminal voltage is the voltage of a first channel in an operating state in a target machine set;
the determining module is used for determining whether a voltage transformer PT slow melting fault exists according to the first machine terminal voltage and a preset voltage;
the preset voltage comprises a second generator terminal voltage of a second channel in the target unit and/or a synchronous voltage of an excitation system;
the determination module is specifically configured to, in a case where the predetermined voltage includes a second terminal voltage and a synchronous voltage of the excitation system,
and under the condition that the first machine terminal voltage is smaller than the second machine terminal voltage and the difference value of the first machine terminal voltage and the second machine terminal voltage is larger than a first deviation threshold value, judging whether the first machine terminal voltage is smaller than the synchronous voltage of the excitation system or not and whether the difference value of the first machine terminal voltage and the second machine terminal voltage is not larger than a second deviation threshold value or not, and under the condition that the first machine terminal voltage is smaller than the synchronous voltage of the excitation system and the difference value of the first machine terminal voltage and the second machine terminal voltage is not larger than the second deviation threshold value, executing the PT slow melting fault determination.
7. A control terminal, characterized in that it comprises a processor, a memory and a program or instructions stored on the memory and executable on the processor, which when executed by the processor implement the steps of the method according to any one of claims 1 to 5.
8. A computer-readable storage medium, having stored thereon a program or instructions which, when executed by a processor, carry out the steps of the method according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110004965.8A CN112881906B (en) | 2021-01-04 | 2021-01-04 | Fault judgment method and device and control terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110004965.8A CN112881906B (en) | 2021-01-04 | 2021-01-04 | Fault judgment method and device and control terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112881906A CN112881906A (en) | 2021-06-01 |
| CN112881906B true CN112881906B (en) | 2022-12-09 |
Family
ID=76046773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110004965.8A Active CN112881906B (en) | 2021-01-04 | 2021-01-04 | Fault judgment method and device and control terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112881906B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113721181A (en) * | 2021-08-04 | 2021-11-30 | 华能汕头海门发电有限责任公司 | Self-shunt excitation PT slow-fusing fault judgment method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02219434A (en) * | 1989-02-17 | 1990-09-03 | Fuji Electric Co Ltd | Malfunction detecting apparatus for process system of automatic voltage regulator |
| CN106292501A (en) * | 2016-10-13 | 2017-01-04 | 武汉华乙电气自动化科技有限公司 | The field regulator that can remotely monitor and method |
| CN107271836A (en) * | 2017-07-19 | 2017-10-20 | 国网新疆电力公司电力科学研究院 | The PT wire break detection methods that fuse of generator generator terminal melts slowly |
| CN109541469A (en) * | 2019-01-09 | 2019-03-29 | 中国长江电力股份有限公司 | A kind of generator excited system PT broken string method of discrimination |
| CN111650542A (en) * | 2020-07-07 | 2020-09-11 | 国电大渡河瀑布沟发电有限公司 | Detection device and method for preventing slow fusing of generator set terminal voltage transformer fuse |
| CN111913137A (en) * | 2020-09-03 | 2020-11-10 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Excitation system PT slow-melting discrimination performance evaluation device and method |
-
2021
- 2021-01-04 CN CN202110004965.8A patent/CN112881906B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02219434A (en) * | 1989-02-17 | 1990-09-03 | Fuji Electric Co Ltd | Malfunction detecting apparatus for process system of automatic voltage regulator |
| CN106292501A (en) * | 2016-10-13 | 2017-01-04 | 武汉华乙电气自动化科技有限公司 | The field regulator that can remotely monitor and method |
| CN107271836A (en) * | 2017-07-19 | 2017-10-20 | 国网新疆电力公司电力科学研究院 | The PT wire break detection methods that fuse of generator generator terminal melts slowly |
| CN109541469A (en) * | 2019-01-09 | 2019-03-29 | 中国长江电力股份有限公司 | A kind of generator excited system PT broken string method of discrimination |
| CN111650542A (en) * | 2020-07-07 | 2020-09-11 | 国电大渡河瀑布沟发电有限公司 | Detection device and method for preventing slow fusing of generator set terminal voltage transformer fuse |
| CN111913137A (en) * | 2020-09-03 | 2020-11-10 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Excitation system PT slow-melting discrimination performance evaluation device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112881906A (en) | 2021-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9860844B2 (en) | Method and apparatus of temperature control | |
| US10610152B2 (en) | Sleep state detection method, apparatus and system | |
| EP3598604B1 (en) | Method and system for regulating reverse charging current | |
| RU2701057C1 (en) | Method and device for displaying time on a mobile device | |
| US20170013456A1 (en) | Method and device for testing a terminal | |
| KR101913360B1 (en) | Method and device for switching on or off socket | |
| CN107331910B (en) | Charging method and device | |
| CN112881906B (en) | Fault judgment method and device and control terminal | |
| CN111246199B (en) | Control method and device for camera test, terminal equipment and storage medium | |
| CN112148148A (en) | Touch operation identification method and device, mobile terminal and storage medium | |
| EP3188566A1 (en) | Application management method and device | |
| CN109521923B (en) | Floating window control method and device and storage medium | |
| CN113922459A (en) | Charging protection method and device, electronic equipment and storage medium | |
| CN106776204B (en) | Method and device for determining power consumption application | |
| CN114337242A (en) | Method and apparatus for determining a switching current threshold of a power factor correction module | |
| CN115866128A (en) | Electronic device control method, electronic device control device, electronic device control medium, and electronic device | |
| CN114484734B (en) | Fault detection method and device for air conditioning system, air conditioner and medium | |
| CN111130223B (en) | Wireless charging display method and device | |
| CN113835503B (en) | Method and device for controlling display mode switching, electronic equipment and storage medium | |
| CN107395472B (en) | Control method and device of intelligent household equipment | |
| CN108334328B (en) | Intelligent terminal and flashing method thereof | |
| CN114325194A (en) | Air conditioner testing method, device and system, electronic equipment and storage medium | |
| CN105450854A (en) | Weather forecasting method and apparatus | |
| CN117348714A (en) | Power consumption abnormality processing method and device of electronic equipment and electronic equipment | |
| CN115460573A (en) | Bluetooth device fault detection method, storage medium and terminal device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |