CN116718952A - Method and device for diagnosing overtemperature fault of dry type transformer - Google Patents
Method and device for diagnosing overtemperature fault of dry type transformer Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 claims description 33
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- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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Abstract
A method and a device for diagnosing overtemperature faults of a dry-type transformer, the method comprises the following steps in sequence: the method comprises the steps of obtaining an overtemperature alarm signal and a fault state signal sent by a temperature controller module of the transformer, judging whether the fault state signal shows a fault, obtaining a communication state signal, a fan running state signal, room temperature data and the like, judging the type of the overtemperature alarm signal of the transformer, respectively giving out corresponding diagnosis conclusions for different overtemperature alarm signals, and the like.
Description
Technical Field
The application relates to the field of monitoring, relates to fault diagnosis of a rail transit transformer, and in particular relates to an overtemperature fault diagnosis method and device for a dry type transformer.
Background
The dry type transformer is core equipment in a subway power supply system, so that the stable operation of the dry type transformer is ensured, and the dry type transformer has important significance for ensuring the safe and stable operation of a subway. In the actual use process of the transformer, the temperature of the winding or the iron core of the transformer exceeds the threshold value of the overtemperature alarm signal under the influence of the factors such as the ambient temperature, the load working condition, the insulation aging degree of the winding and the like, so that the overtemperature alarm signal of the component is generated, and the normal operation of the transformer is seriously influenced. It is important to diagnose and analyze the cause of the over-temperature fault.
At present, a fault diagnosis method for a transformer is mainly used for diagnosing faults of an oil immersed transformer by analyzing characteristic parameter data in transformer insulating oil, and the fault diagnosis method for the dry transformer has great limitation. The other diagnosis methods mainly depend on manual judgment of operation and maintenance personnel, the diagnosis conclusion is too subjective, and the diagnosis method has high requirements on the technical level of the operation and maintenance personnel.
Disclosure of Invention
The application aims to overcome the defects of the prior art, and provides a method and a device for diagnosing the overtemperature fault of a dry-type transformer, which are simple and convenient to operate, accurate in judgment and standard in flow, can diagnose and analyze the overtemperature alarm fault cause of the dry-type transformer and provide a processing method, and solve the problems of inaccurate analysis and lack of pertinence in processing of the temperature fault cause of the dry-type transformer.
The application provides a dry-type transformer over-temperature fault diagnosis method which comprises the following steps of:
(1) Obtaining an overtemperature alarm signal and a fault state signal sent by a temperature controller module of the transformer, and judging whether the fault state signal shows a fault or not:
if the fault status signal indicates that the temperature controller module is faulty, a diagnostic conclusion is given: the temperature controller module of the transformer fails, and the overtemperature alarm signal of the transformer is a false signal; if the fault state signal shows that the temperature controller module is in a normal state, continuing the next step;
(2) Obtaining a communication state signal of a temperature controller module sending out an overtemperature alarm signal, and judging whether the communication of the temperature controller module is normal or not:
if the communication status signal shows that the communication is interrupted, a diagnosis conclusion is given: the communication of the temperature controller module is interrupted, and an overtemperature alarm signal of the transformer is an error signal; if the communication state signal shows that the communication is normal, continuing to execute the next step;
(3) Obtaining a fan running state signal corresponding to the transformer, and judging whether the fan runs normally or not:
if the fan running state signal shows that the fan is not started, a diagnosis conclusion is given: the fan is not operated, so that the temperature of the transformer is too high, and the fan is recommended to be started; if the fan running state signal shows that the fan is started, continuing to execute the next step;
(4) Obtaining temperature data between transformer rooms, and judging whether the room temperature is normal or not:
if the room temperature is greater than the nominal ambient temperature, a diagnostic conclusion is drawn: the temperature between transformer rooms is too high, which results in the transformer being too high, and it is recommended to start an air conditioner or other equipment to reduce the room temperature; if the room temperature is less than or equal to the rated ambient temperature, continuing to execute the next step;
(5) Judging the type of the overtemperature alarm signal of the transformer, and respectively giving corresponding diagnosis conclusions for different overtemperature alarm signals.
In a preferred mode, the over-temperature alarm signal, the fault state signal, the communication state signal, the fan running state signal and the temperature data are obtained through a subway electric power monitoring system.
In a preferred mode, the overtemperature alarm signal in the step (1) comprises a winding overtemperature alarm signal and/or an iron core overtemperature alarm signal, wherein when the acquired winding temperature exceeds a set winding temperature upper limit value and/or the acquired iron core temperature exceeds a set iron core temperature upper limit value, the temperature controller module correspondingly sends the winding overtemperature alarm signal and/or the iron core overtemperature alarm signal.
In a preferred mode, in the step (4), determining whether the room temperature is normal specifically includes: and comparing the room temperature with the rated environment temperature, wherein the rated environment temperature is the rated environment temperature of the transformer in a normal working state.
In a preferred mode, the overtemperature alarm signal sent by the transformer temperature controller module in the step (5) comprises a winding overtemperature alarm signal and/or an iron core overtemperature alarm signal.
In a preferred mode, when the overtemperature alarm signal in the step (5) includes winding overtemperature alarm, a diagnosis conclusion is obtained: the overtemperature of the transformer winding is mainly influenced by the load current of the winding, and the magnitude of the load current of the transformer is noted.
In a preferred mode, when the overtemperature alarm signal in the step (5) includes an iron core overtemperature alarm signal, a diagnosis conclusion is given: the over-temperature of the transformer core is mainly influenced by the load voltage, and the magnitude of the load voltage of the transformer is noted.
In a preferred mode, when the overtemperature alarm signal comprises winding overtemperature alarm, historical data of a transformer load current value and historical data of a transformer winding temperature value are obtained through a subway power monitoring system, a transformer load current curve and a transformer winding temperature curve which are displayed for one hour in the past are respectively fitted, and a winding overtemperature reason is compared and analyzed;
when the temperature alarm signal comprises an iron core overtemperature alarm signal, historical data of a transformer load voltage value and historical data of a transformer iron core temperature value are obtained through a subway power monitoring system, a transformer load voltage curve and a transformer iron core temperature curve which are displayed for one hour in the past are respectively fitted, and a winding overtemperature reason is compared and analyzed;
in a preferred mode, the method further comprises the step (6): and displaying prompt information in the fault diagnosis and analysis process.
The application also provides a device for diagnosing the overtemperature fault of the dry-type transformer, which comprises:
the signal acquisition module is used for acquiring data required by the fault diagnosis method process and interacting with the subway electric power monitoring system through the data transmission channel;
the data analysis judging module is used for analyzing the data acquired by the signal acquisition module, judging the data and controlling the trend of the fault diagnosis analysis flow according to the judging result;
the conclusion pushing module is used for giving a diagnosis conclusion of the transformer over-temperature fault and sending the diagnosis conclusion to the display module;
and the display module is used for displaying prompt information in the fault diagnosis and analysis process to an operator through a display interface.
The method and the device for diagnosing the overtemperature fault of the dry-type transformer are simple and convenient to operate, accurate in judgment and standard in flow, adopt a specific progressive judgment method, have strong pertinence and high accuracy, can diagnose and analyze the overtemperature alarm fault cause of the dry-type transformer and provide a processing method, and solve the problems of inaccurate analysis of the temperature fault cause of the dry-type transformer and lack of pertinence in processing.
Drawings
FIG. 1 is a flow chart of a fault diagnosis analysis;
FIG. 2 is a schematic diagram of a temperature variation curve of a transformer winding;
fig. 3 is a schematic diagram of a temperature change curve of a transformer core;
fig. 4 is a schematic structural diagram of a transformer over-temperature fault diagnosis device.
Detailed Description
The following detailed description of the application is provided for the purpose of further illustrating the application and should not be construed as limiting the scope of the application, as numerous insubstantial modifications and adaptations of the application as described above will be apparent to those skilled in the art and are intended to be within the scope of the application.
The application provides a method and a device for diagnosing an overtemperature fault of a dry-type transformer, which concretely relates to an implementation mode of the method and the device, wherein the implementation mode is shown in figures 1-4, and fig. 1 is a fault diagnosis analysis flow chart, fig. 2 is a temperature change curve schematic diagram of a transformer winding, fig. 3 is a temperature change curve schematic diagram of a transformer iron core, and fig. 4 is a structural schematic diagram of the overtemperature fault diagnosis device of the transformer. The method and the device for diagnosing the overtemperature fault of the dry-type transformer are specifically described below.
Referring to fig. 1, the application provides a dry-type transformer over-temperature fault diagnosis method, which specifically comprises the following steps:
step 1, acquiring an overtemperature alarm signal and a fault state signal sent by a temperature controller module of a transformer through a subway electric power monitoring system, and judging whether the fault state signal shows a fault.
The over-temperature alarm signal is not distinguished from the winding over-temperature alarm signal or the iron core over-temperature alarm signal. The subway power monitoring system is used for collecting telemetry information, remote signaling information, remote control information and remote regulation information in a subway power supply system and can be used for classifying and displaying the information in a centralized manner. The temperature controller module of the transformer is used for collecting the temperature of a winding of the transformer and the temperature of a transformer iron core, and when the collected temperature of the winding exceeds the set upper limit value of the temperature of the winding, the temperature controller module sends out an overtemperature alarm signal of the winding; when the temperature of the collected iron core exceeds the set upper limit value of the temperature of the iron core, the temperature controller module sends out an over-temperature alarm signal of the iron core.
Specifically, if the fault status signal indicates that the temperature controller module is faulty, a diagnosis conclusion is given: the temperature controller module of the transformer fails, and the overtemperature alarm signal of the transformer is a false signal; if the fault state signal shows that the temperature controller module is in a normal state, continuing to execute the step 2;
and step 2, obtaining a communication state signal of the temperature controller module sending out the overtemperature alarm signal through the subway electric power monitoring system, and judging whether the communication of the temperature controller module is normal or not.
Specifically, if the communication status signal indicates that the temperature controller module is interrupted, a diagnosis conclusion is given: the communication of the temperature controller module is interrupted, and an overtemperature alarm signal of the transformer is an error signal; if the communication state signal shows that the temperature controller module is normal in communication, the step 3 is continuously executed;
step 3, obtaining a fan running state signal corresponding to the transformer through a subway electric power monitoring system;
specifically, if the fan running state signal shows that the fan is not started, a diagnosis conclusion is given: the fan is not operated, so that the temperature of the transformer is too high, and the fan is recommended to be started; if the fan running state signal shows that the fan is started, continuing to execute the step 4;
step 4, obtaining temperature data between transformer rooms through a subway electric power monitoring system, and comparing the room temperature with a rated environment temperature; the rated environment temperature is the rated environment temperature of the transformer in a normal working state and is obtained by referring to a using instruction of transformer equipment;
specifically, if the room temperature is greater than the rated ambient temperature, a diagnostic conclusion is drawn: the temperature between transformer rooms is too high, which results in the transformer being too high, and it is recommended to start an air conditioner or other equipment to reduce the room temperature; if the room temperature is less than or equal to the rated ambient temperature, continuing to execute the step 5;
and 5, judging the type of the overtemperature alarm signal of the transformer, and respectively giving corresponding diagnosis conclusions for different overtemperature alarm signals. The overtemperature alarm signal sent by the transformer temperature controller module has two conditions: winding overtemperature alarm signals and iron core overtemperature alarm signals.
Specifically, if the alarm signal sent by the temperature controller module is winding overtemperature alarm, a diagnosis conclusion is obtained: the overtemperature of the transformer winding is mainly influenced by the load current of the winding, and the magnitude of the load current of the transformer is noted. The method comprises the steps that historical data of a transformer load current value and historical data of a transformer winding temperature value are obtained through a subway power monitoring system, a transformer load current curve and a transformer winding temperature curve of the past hour are displayed, an abscissa is a time axis, a time period of the past hour is displayed, and the two abscissas respectively represent the load current and the winding temperature; and fitting the data of the load current value in the past hour into a curve, fitting the data of the winding temperature value in the past hour into a curve, and comparing and analyzing the reason of the winding overtemperature.
If, when the alarm signal sent by the temperature controller module is the iron core overtemperature alarm signal, a diagnosis conclusion is given: the over-temperature of the transformer core is mainly influenced by the load voltage, and the magnitude of the load voltage of the transformer is noted. The method comprises the steps that historical data of a transformer load voltage value and historical data of a transformer core temperature value are obtained through a subway power monitoring system, a transformer load voltage curve and a transformer core temperature curve of the past hour are displayed, an abscissa is a time axis, a time period of the past hour is displayed, and the two abscissas respectively represent the load voltage and the core temperature; and fitting the data of the load voltage value in the past hour into a curve, fitting the data of the iron core temperature value in the past hour into a curve, and comparing and analyzing the reason of the iron core overtemperature.
The application also provides a device for diagnosing the overtemperature fault of the transformer, as shown in fig. 4, which comprises: the system comprises a signal acquisition module 21, a data analysis and judgment module 22, a conclusion pushing module 23 and a display module 24, wherein:
the signal acquisition module 21 is configured to acquire data required by an analysis process of the over-temperature fault diagnosis method of the dry-type transformer from the subway electric power monitoring system, and interact with the subway electric power monitoring system through a data transmission channel. The transmission protocol can be IEC104 protocol, the standard protocol has good compatibility, and the method is applicable to various subway electric power monitoring systems, and the standardized protocol is beneficial to improving the reliability of communication and can well meet the communication requirements in fault analysis and diagnosis.
Specifically, the signal acquisition module 21 is configured to acquire an overtemperature alarm signal sent by the transformer temperature controller module from the subway electric power monitoring system; obtaining a fault state signal of a temperature controller module sending out an overtemperature alarm signal from a subway electric power monitoring system; obtaining a communication state signal of a temperature controller module sending out an overtemperature alarm signal from a subway electric power monitoring system; obtaining a fan running state signal corresponding to a transformer from a subway electric power monitoring system; the method comprises the steps of obtaining temperature data between transformer rooms from a subway electric power monitoring system; the method comprises the steps of obtaining past one-hour historical data of a transformer load current value and past one-hour historical data of a transformer winding temperature value from a subway power monitoring system; the method comprises the steps of obtaining past one-hour historical data of a transformer load voltage value and past one-hour historical data of a transformer core temperature value from a subway power monitoring system.
The data analysis and judgment module 22 is configured to analyze the data acquired by the signal acquisition module, judge the data, and control the trend of the fault diagnosis and analysis process according to the judgment result.
Specifically, the data analysis and judgment module 22 is configured to analyze the fault state signal of the temperature controller module acquired from the signal acquisition module 21, judge whether the temperature controller module is faulty, and control the trend of the fault analysis flow according to the judgment result, that is, when the temperature controller module is in the fault state, give a diagnosis conclusion: the temperature controller module of the transformer fails, and the overtemperature alarm signal of the transformer is a false signal; if the fault state signal shows that the temperature controller module is in a normal state, continuing the next step;
the data analysis and judgment module 22 is further configured to analyze the communication status signal of the temperature controller module acquired from the signal acquisition module 21, judge whether the communication of the temperature controller module is normal, and control the trend of the fault analysis flow according to the judgment result, that is, when the communication of the temperature controller module is in an interrupt state, give a diagnosis conclusion: the communication of the temperature controller module is interrupted, and an overtemperature alarm signal of the transformer is an error signal; if the communication state signal shows that the temperature controller module is normal in communication, continuing to execute the next step;
the data analysis and judgment module 22 is further configured to analyze the fan operation status signal corresponding to the transformer acquired from the signal acquisition module 21, judge whether the fan is operated, and control the trend of the fault analysis flow according to the judgment result, that is, when the fan operation status is not started, give a diagnosis conclusion: the fan is not operated, so that the temperature of the transformer is too high, and the fan is recommended to be started; if the fan running state signal shows that the fan is started, continuing to execute the next step;
the data analysis and judgment module 22 is further configured to analyze the transformer room temperature data acquired from the signal acquisition module 21, compare the room temperature with the rated environment temperature, and control the trend of the fault analysis flow according to the comparison result, i.e. when the room temperature is greater than the rated environment temperature, then give a diagnosis conclusion: the temperature between transformer rooms is too high, which results in the transformer being too high, and it is recommended to start an air conditioner or other equipment to reduce the room temperature; if the room temperature is less than or equal to the rated ambient temperature, continuing to execute the next step;
the data analysis and judgment module 22 is further configured to analyze the transformer overtemperature alarm signal acquired by the signal acquisition module 21, judge a type of the transformer overtemperature alarm signal, and control a trend of a fault analysis flow according to a judgment result, that is, when the overtemperature alarm signal is a winding overtemperature alarm, obtain a diagnosis conclusion: the overtemperature of the transformer winding is mainly influenced by the load current of the winding, and the magnitude of the load current of the transformer is noted. The method comprises the steps that historical data of a transformer load current value and historical data of a transformer winding temperature value are obtained through a subway power monitoring system, and a transformer load current curve and a transformer winding temperature curve of the past hour are displayed; and fitting the data of the load current value in the past hour into a curve, fitting the data of the winding temperature value in the past hour into a curve, and comparing and analyzing the reason of the winding overtemperature. When the alarm signal sent by the temperature controller module is an iron core overtemperature alarm signal, a diagnosis conclusion is given: the over-temperature of the transformer core is mainly influenced by the load voltage, and the magnitude of the load voltage of the transformer is noted. The method comprises the steps that historical data of a transformer load voltage value and historical data of a transformer core temperature value are obtained through a subway power monitoring system, and a transformer load voltage curve and a transformer core temperature curve of the past hour are displayed; and fitting the data of the load voltage value in the past hour into a curve, fitting the data of the iron core temperature value in the past hour into a curve, and comparing and analyzing the reason of the iron core overtemperature.
The conclusion pushing module 23 is configured to give a diagnosis conclusion of the transformer over-temperature fault, and send the diagnosis conclusion to the display module.
The conclusion pushing module 23 is specifically configured to give a diagnosis conclusion of the transformer over-temperature fault: the "failure of the transformer temperature controller module, false alarm of the transformer overtemperature" and the sending of the diagnosis result information to the display module 24.
And the method is also used for giving a diagnosis conclusion of the transformer over-temperature fault: the "transformer temperature controller module communication is interrupted, the transformer overtemperature alarm signal is an error signal", and the information of the diagnosis conclusion is sent to the display module 24.
And the method is also used for giving a diagnosis conclusion of the transformer over-temperature fault: "fan not running, resulting in excessive transformer temperature, suggesting fan on" and sending diagnostic information to display module 24.
And the method is also used for giving a diagnosis conclusion of the transformer over-temperature fault: "excessive temperature between the transformer rooms, resulting in excessive temperature of the transformer, suggests turning on an air conditioner or other equipment to reduce room temperature", and sends information of the diagnosis conclusion to the display module 24.
And the method is also used for giving a diagnosis conclusion of the transformer over-temperature fault: "the transformer winding overtemperature is mainly affected by the winding load current, the magnitude of the transformer load current is noted", and the information of the diagnosis conclusion is sent to the display module 24.
And the method is also used for giving a diagnosis conclusion of the transformer over-temperature fault: "the transformer core over temperature is mainly affected by the load voltage, note the magnitude of the transformer load voltage", and send the information of the diagnosis conclusion to the display module 24.
The display module 24 is configured to display prompt information in the fault diagnosis and analysis process to an operator through a display interface. The prompting information may be an overtemperature alarm signal sent by the signal acquisition module 21 from a transformer temperature controller module acquired by the subway electric power monitoring system, and is used for prompting that an overtemperature fault occurs in the transformer.
The prompt information may also be a fault state signal of the temperature controller module collected by the signal obtaining module 21 from the subway electric power monitoring system, and a judgment result of the data analysis judging module 22: and whether the temperature controller module has a fault or not is used for prompting the fault state of the temperature controller.
The prompt information can also be the diagnosis conclusion of the transformer over-temperature fault sent by the conclusion pushing module 23. The prompt information may also be a communication status signal of the temperature controller module collected by the signal obtaining module 21 from the subway electric power monitoring system, and a judgment result of the data analysis judging module 22: and whether the communication of the temperature controller module is interrupted or not is used for prompting the communication state of the temperature controller module.
The prompt information can also be the diagnosis conclusion of the transformer over-temperature fault sent by the conclusion pushing module 23. The prompt information may also be an operation state signal of the fan corresponding to the transformer collected by the signal obtaining module 21 from the subway electric power monitoring system, and a judgment result of the data analysis and judgment module 22: and whether the transformer fan is started or not is used for prompting the running state of the transformer fan.
The prompt information can also be the diagnosis conclusion of the transformer over-temperature fault sent by the conclusion pushing module 23. The prompt information may also be the temperature data between transformer rooms collected by the signal obtaining module 21 from the subway electric power monitoring system, and the judgment result of the data analysis judging module 22: and whether the temperature of the transformer room exceeds a rated value or not is used for prompting the temperature condition of the transformer room.
The prompt information can also be the diagnosis conclusion of the transformer over-temperature fault sent by the conclusion pushing module 23. The prompt information may also be an overtemperature alarm signal of the transformer acquired by the signal acquisition module 21, and is used for prompting specific content of the overtemperature alarm signal.
The prompt information may also be a diagnosis conclusion of the transformer over-temperature fault sent by the conclusion pushing module 23, and a historical curve of the change of the load current of the transformer and the temperature of the winding of the transformer with time, as shown in fig. 2, for comparing and analyzing the reason of the over-temperature of the winding.
The prompt information may also be a diagnosis conclusion of the transformer over-temperature fault sent by the conclusion pushing module 23, and a historical curve of the change of the load voltage of the transformer and the temperature of the transformer core with time, as shown in fig. 3, for comparing and analyzing the reason of the over-temperature of the core.
The dry-type transformer over-temperature fault diagnosis method provided by the application can be processed in computer equipment, and the processing device can be the computer equipment for executing the method, wherein the computer equipment can comprise one or more processors, such as one or more Central Processing Units (CPU), and each processing unit can realize one or more hardware threads. The computer device may also include any memory for storing any kind of information such as code, settings, data, etc. For example, and without limitation, the memory may include any one or more of the following combinations: any type of RAM, any type of ROM, flash memory devices, hard disks, optical disks, etc. More generally, any memory may store information using any technique. Further, any memory may provide volatile or non-volatile retention of information. Further, any memory may represent fixed or removable components of a computer device. In one case, the computer device may perform any of the operations of the associated instructions when the processor executes the associated instructions stored in any memory or combination of memories. The computer device also includes one or more drive mechanisms for interacting with any memory, such as a hard disk drive mechanism, optical disk drive mechanism, and the like.
The computer device may also include an input/output module (I/O) for receiving various inputs (via the input device) and for providing various outputs (via the output device)). One particular output mechanism may include a presentation device and an associated Graphical User Interface (GUI). In other embodiments, input/output modules (I/O), input devices, and output devices may not be included, but may be implemented as a single computer device in a network. The computer device may also include one or more network interfaces for exchanging data with other devices via one or more communication links. One or more communication buses couple the above-described components together.
The communication link may be implemented in any manner, for example, through a local area network, a wide area network (e.g., the Internet), a point-to-point connection, etc., or any combination thereof. The communication link may comprise any combination of hardwired links, wireless links, routers, gateway functions, name servers, etc., governed by any protocol or combination of protocols.
Although exemplary embodiments of the present application have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions, and the like, can be made in the form and detail without departing from the scope and spirit of the application as disclosed in the accompanying claims, all such modifications are intended to be within the scope of the application as disclosed in the accompanying claims, and the various steps of the application in the various departments and methods of the claimed product can be combined together in any combination. Therefore, the description of the embodiments disclosed in the present application is not intended to limit the scope of the present application, but is used to describe the present application. Accordingly, the scope of the application is not limited by the above embodiments, but is defined by the claims or equivalents thereof.
Claims (10)
1. The over-temperature fault diagnosis method for the dry-type transformer is characterized by comprising the following steps of:
(1) Obtaining an overtemperature alarm signal and a fault state signal sent by a temperature controller module of the transformer, and judging whether the fault state signal shows a fault or not:
if the fault status signal indicates that the temperature controller module is faulty, a diagnostic conclusion is given: the temperature controller module of the transformer fails, and the overtemperature alarm signal of the transformer is a false signal; if the fault state signal shows that the temperature controller module is in a normal state, continuing the next step;
(2) Obtaining a communication state signal of a temperature controller module sending out an overtemperature alarm signal, and judging whether the communication of the temperature controller module is normal or not:
if the communication status signal shows that the communication is interrupted, a diagnosis conclusion is given: the communication of the temperature controller module is interrupted, and an overtemperature alarm signal of the transformer is an error signal; if the communication state signal shows that the communication is normal, continuing to execute the next step;
(3) Obtaining a fan running state signal corresponding to the transformer, and judging whether the fan runs normally or not:
if the fan running state signal shows that the fan is not started, a diagnosis conclusion is given: the fan is not operated, so that the temperature of the transformer is too high, and the fan is recommended to be started; if the fan running state signal shows that the fan is started, continuing to execute the next step;
(4) Obtaining temperature data between transformer rooms, and judging whether the room temperature is normal or not:
if the room temperature is greater than the nominal ambient temperature, a diagnostic conclusion is drawn: the temperature between transformer rooms is too high, which results in the transformer being too high, and it is recommended to start an air conditioner or other equipment to reduce the room temperature; if the room temperature is less than or equal to the rated ambient temperature, continuing to execute the next step;
(5) Judging the type of the overtemperature alarm signal of the transformer, and respectively giving corresponding diagnosis conclusions for different overtemperature alarm signals.
2. The method of claim 1, wherein: and acquiring an overtemperature alarm signal, a fault state signal, a communication state signal, a fan running state signal and temperature data through a subway electric power monitoring system.
3. A method according to claim 1 or 2, characterized in that: the overtemperature alarm signal in the step (1) comprises a winding overtemperature alarm signal and/or an iron core overtemperature alarm signal, wherein when the acquired winding temperature exceeds a set winding temperature upper limit value and/or the acquired iron core temperature exceeds a set iron core temperature upper limit value, the temperature controller module correspondingly sends the winding overtemperature alarm signal and/or the iron core overtemperature alarm signal.
4. A method as claimed in claim 3, wherein: in the step (4), judging whether the room temperature is normal or not specifically comprises the following steps: and comparing the room temperature with the rated environment temperature, wherein the rated environment temperature is the rated environment temperature of the transformer in a normal working state.
5. The method of claim 1 or 4, wherein: and (3) the overtemperature alarm signal sent by the transformer temperature controller module in the step (5) comprises a winding overtemperature alarm signal and/or an iron core overtemperature alarm signal.
6. The method of claim 5, wherein: when the overtemperature alarm signal in the step (5) comprises winding overtemperature alarm, a diagnosis conclusion is obtained: the overtemperature of the transformer winding is mainly influenced by the load current of the winding, and the magnitude of the load current of the transformer is noted.
7. The method of claim 6, wherein: when the overtemperature alarm signal in the step (5) comprises an iron core overtemperature alarm signal, a diagnosis conclusion is given: the over-temperature of the transformer core is mainly influenced by the load voltage, and the magnitude of the load voltage of the transformer is noted.
8. The method of claim 6 or 7, wherein: when the overtemperature alarm signal comprises winding overtemperature alarm, historical data of a transformer load current value and historical data of a transformer winding temperature value are obtained through a subway power monitoring system, a transformer load current curve and a transformer winding temperature curve which are displayed for one hour in the past are respectively fitted, and a winding overtemperature reason is compared and analyzed;
when the temperature alarm signal comprises an iron core overtemperature alarm signal, historical data of a transformer load voltage value and historical data of a transformer iron core temperature value are obtained through a subway power monitoring system, a transformer load voltage curve and a transformer iron core temperature curve which are displayed for one hour in the past are respectively fitted, and winding overtemperature reasons are compared and analyzed.
9. The method of claim 1, wherein: further comprising the step (6): and displaying prompt information in the fault diagnosis and analysis process.
10. A dry-type transformer over-temperature fault diagnosis apparatus for implementing the method of any one of claims 1 to 9, comprising:
the signal acquisition module is used for acquiring data required by the fault diagnosis method process and interacting with the subway electric power monitoring system through the data transmission channel;
the data analysis judging module is used for analyzing the data acquired by the signal acquisition module, judging the data and controlling the trend of the fault diagnosis analysis flow according to the judging result;
the conclusion pushing module is used for giving a diagnosis conclusion of the transformer over-temperature fault and sending the diagnosis conclusion to the display module;
and the display module is used for displaying prompt information in the fault diagnosis and analysis process to an operator through a display interface.
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