CN116045796A - Method, device, system, equipment and medium for judging deformation of transformer winding - Google Patents
Method, device, system, equipment and medium for judging deformation of transformer winding Download PDFInfo
- Publication number
- CN116045796A CN116045796A CN202310078444.6A CN202310078444A CN116045796A CN 116045796 A CN116045796 A CN 116045796A CN 202310078444 A CN202310078444 A CN 202310078444A CN 116045796 A CN116045796 A CN 116045796A
- Authority
- CN
- China
- Prior art keywords
- short
- wave recording
- determining
- deformation
- winding
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
-
- 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
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- 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
-
- 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
- G01R31/72—Testing of electric windings
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The embodiment of the application discloses a method for judging transformer winding deformation, a device for judging transformer winding deformation, a system for judging transformer winding deformation, computer equipment and a computer readable storage medium. The method comprises the following steps: acquiring a wave recording waveform in real time through a fault wave recording system; when the waveform of the wave recording is determined to belong to a fault state, working condition information of the transformer substation is obtained according to the waveform of the wave recording; calculating and determining the space size of the winding according to the working condition information; and determining the deformation condition according to the winding space size. Therefore, the method and the device can acquire the wave recording waveform recorded by the fault wave recording system in real time, and when the wave recording waveform belongs to a fault state, the deformation condition of the winding is practically restored according to the analysis working condition information, so that the timeliness of judging the deformation problem is ensured, and the problem is rapidly and accurately positioned; meanwhile, the analysis of the working condition information truly restores the actual working condition of the transformer winding, so that erroneous judgment is reduced, and the judgment accuracy is improved.
Description
Technical Field
The application belongs to the technical field of power equipment, and particularly relates to a method for judging transformer winding deformation, a device for judging transformer winding deformation, a system for judging transformer winding deformation, computer equipment and a computer readable storage medium.
Background
The transformer can receive many times of short circuit impact in the middle of the operation, because the transformer tolerates the short circuit ability inadequately and can lead to the winding to take place to warp, in case take place the winding warp very easily lead to the transformer trouble, therefore on-line real-time judgement transformer winding warp the state and have important meaning to the fault of precontrolled transformer. The existing method for judging the deformation of the transformer winding adopts an off-line mode to judge, mainly comprises an impedance method and a frequency response method, wherein the impedance method is used for carrying out tests and judgment according to a DL/T1093 standard, the frequency response method is used for carrying out tests and judgment mainly according to a DL/T911 standard, the two test methods are carried out in a power failure mode, and obvious defects exist in the timeliness aspect of the deformation judgment of the winding; meanwhile, the frequency response method and the impedance method are greatly influenced by test factors in field test, and misjudgment can be caused by improper treatment in field test. How to timely and accurately judge the deformation of the transformer winding is a technical problem to be solved urgently by the person skilled in the art.
The foregoing description is provided for general background information and does not necessarily constitute prior art.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a method for determining deformation of a transformer winding, an apparatus for determining deformation of a transformer winding, a system for determining deformation of a transformer winding, a computer device, and a computer-readable storage medium, which are capable of effectively determining deformation of a transformer winding.
The technical problem that this application solved is realized by adopting following technical scheme:
the application provides a method for judging deformation of a transformer winding, which comprises the following steps: acquiring a wave recording waveform in real time through a fault wave recording system; when the waveform of the wave recording is determined to belong to a fault state, working condition information of the transformer substation is obtained according to the waveform of the wave recording; calculating and determining the space size of the winding according to the working condition information; and determining the deformation condition according to the winding space size.
In an alternative embodiment of the present application, determining that the waveform belongs to a fault state includes: acquiring a wave recording waveform comprising a first wave recording waveform and a second wave recording waveform according to a preset frequency; respectively acquiring voltage information and current information of a first wave recording waveform and a second wave recording waveform; when the voltage information and the current information are determined to accord with the short circuit condition, the waveform is determined to belong to the fault state.
In an optional embodiment of the present application, the working condition information includes voltage information, current information, and phase parameters, and determining the winding space size according to the working condition information includes: establishing a terminal voltage calculation model according to the voltage information, the current information and the phase parameter; obtaining a general solution of a terminal voltage calculation model to obtain a short-circuit current equation; substituting the working condition information into a short-circuit current equation to obtain short-circuit impedance; winding space size is determined from the short circuit impedance calculation.
In an alternative embodiment of the present application, obtaining a general solution of a terminal voltage calculation model to obtain a short-circuit current equation includes: determining a current component model according to the general solution of the terminal voltage calculation model, wherein the current component model is used for representing the relationship between the short-circuit current and the steady-state component and the transient component; acquiring a first calculation coefficient, and respectively establishing a steady-state component model and a transient component model according to the working condition information and the first calculation coefficient, wherein the first calculation coefficient comprises an attenuation coefficient and a short-circuit impedance phase angle; and obtaining a short-circuit current equation according to the steady-state component model, the transient component model and the current component model.
In an alternative embodiment of the present application, substituting the working condition information into the short-circuit current equation to obtain the short-circuit impedance includes: acquiring working condition information of reclosing twice short circuit, wherein the working condition information comprises short circuit voltage, short circuit current and short circuit phase angle; substituting the short-circuit voltage, the short-circuit current and the short-circuit phase angle into a short-circuit current equation to obtain an equivalent short-circuit impedance change value; and determining the short-circuit impedance according to the equivalent short-circuit impedance change value.
In an alternative embodiment of the present application, determining winding space dimensions from short circuit impedance calculations includes: acquiring a second calculation coefficient, and establishing a winding space dimension calculation model according to the second calculation coefficient, wherein the second calculation coefficient comprises frequency, rated current, total turns, potential of each turn, an additional reactance coefficient, an average reactance height and a Rockwell coefficient; substituting the short-circuit impedance into a winding space dimension calculation model, and calculating to obtain the winding space dimension.
The application also provides a device for judging transformer winding deformation, which comprises: the acquisition module is used for acquiring the wave recording waveform in real time through the fault wave recording system; the judging module is used for acquiring working condition information of the transformer substation according to the wave recording waveform when the wave recording waveform is determined to belong to the fault state; the calculation module is used for calculating and determining the space size of the winding according to the working condition information; and the determining module is used for determining deformation according to the winding space size.
The application also provides a system for judging transformer winding deformation, comprising: the transformer winding deformation judging device; the transformer substation fault wave recording system is connected with the transformer winding deformation judging device and is used for collecting wave recording waveforms generated by the operation of the transformer substation in real time and sending the wave recording waveforms to the transformer winding deformation judging device.
The application also provides a computer device comprising a processor and a memory: the processor is configured to execute the computer program stored in the memory to implement the method as described above.
The present application also provides a computer readable storage medium storing a computer program which when executed by a processor implements a method as described above.
By adopting the embodiment of the application, the method has the following beneficial effects:
according to the method and the device, when the transformer substation keeps running, the wave recording waveform recorded by the fault wave recording system can be obtained in real time, when the wave recording waveform belongs to a fault state, the working condition information of the transformer substation in the fault state of the winding is obtained through analysis, so that the deformation condition of the winding is practically reduced, the losses of manpower, material resources and the like caused by power failure are reduced, the running risk of a power grid caused by the power failure can be avoided, and the power supply reliability of the power grid is improved. Furthermore, the recorded wave form of the transformer substation recorded by the fault recording system obtained in real time is used for judging, so that the timeliness of judging the deformation problem is ensured, the judgment can be carried out when the recorded wave form belongs to the fault state, and the problem is rapidly and accurately positioned; meanwhile, the working condition information of the transformer substation is reflected by the wave recording waveform, so that the actual working condition of the transformer winding is practically restored, erroneous judgment is reduced, and the judgment accuracy is improved.
The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification, so that the foregoing and other objects, features and advantages of the present application can be more clearly understood, and the following detailed description of the preferred embodiments is given with reference to the accompanying drawings. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Wherein:
FIG. 1 is a flow chart of a method for determining transformer winding deformation according to an embodiment;
FIG. 2 is a block diagram of an apparatus for determining transformer winding deformation according to an embodiment;
FIG. 3 is a schematic block diagram of a system for determining transformer winding deformation according to an embodiment;
fig. 4 is a schematic block diagram of a computer device according to an embodiment.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The transformer of the transformer substation can receive a plurality of short-circuit impacts in the operation, and the winding can be deformed due to the insufficient short-circuit tolerance of the transformer. The transformer winding deformation detection in the prior art is not power failure detection, and does not have timeliness; the diagnosis is performed mainly on the steady state value, and a certain misjudgment rate is achieved. Therefore, how to timely and accurately judge the deformation condition of the transformer winding provides a method for judging the deformation of the transformer winding, which comprises steps S110-S140. For clarity of description, please refer to fig. 1 specifically, fig. 1 is a flow chart of a method for determining deformation of a transformer winding according to an embodiment.
Step S110: and acquiring the wave recording waveform in real time through a fault wave recording system.
In an embodiment, the method for determining transformer winding deformation provided in the present application is applied to a device for determining transformer winding deformation in a system for determining transformer winding deformation as an execution subject. The specific structure of the system for determining the deformation of the transformer winding and the device for determining the deformation of the transformer winding will be described in detail hereinafter, and will not be described in detail herein. Only the fault wave recording system in the system for judging the deformation of the transformer winding is required to be known, and the wave recording waveform of the transformer can be acquired in real time. The working condition state of the transformer can be determined in real time through the wave recording waveform, the detection work is carried out without power failure, the wave recording waveform reflecting the actual working state of the transformer is judged, the timeliness is ensured, the detection accuracy is ensured, and the error influence caused by non-real-time detection is reduced.
Step S120: and when the waveform is determined to belong to the fault state, acquiring working condition information of the transformer substation according to the waveform.
In one embodiment, determining that the waveform belongs to a fault state in step S120 includes: acquiring a wave recording waveform comprising a first wave recording waveform and a second wave recording waveform according to a preset frequency; respectively acquiring voltage information and current information of a first wave recording waveform and a second wave recording waveform; when the voltage information and the current information are determined to accord with the short circuit condition, the waveform is determined to belong to the fault state.
In one embodiment, the transformer is subjected to a plurality of line faults during operation, and reclosing devices are installed on the lines to ensure operation reliability. When the line is permanently failed, the line is tripped continuously twice, and the wave recording waveforms are changed under the conditions, so that the states of the wave recording waveforms can be detected respectively according to preset frequencies, and the obtained first wave recording waveform and the obtained second wave recording waveform are obtained. It can be understood that the wave recording waveforms are actually the working condition information of the reactive transformer, and the most needed voltage information and current information in the working condition information are needed for fault judgment, so that the corresponding voltage information and current information can be obtained according to the first wave recording waveform and the second wave recording waveform respectively, and if the changes of the voltage information and the current information reflected by the two wave recording waveforms belong to abnormal states, the transformer winding can be determined to be in a fault state. In a preferred embodiment, it is possible to determine whether the transformer is in accordance with a short circuit condition, i.e. whether it is in a fault state, by means of two changes in the fault current. And when the fault state exists, executing the subsequent steps.
Step S130: and calculating and determining the space size of the winding according to the working condition information.
In one embodiment, the operating condition information includes voltage information, current information, and phase parameters. Step S130: calculating and determining the winding space size according to the working condition information comprises the following steps: establishing a terminal voltage calculation model according to the voltage information, the current information and the phase parameter; obtaining a general solution of a terminal voltage calculation model to obtain a short-circuit current equation; substituting the working condition information into a short-circuit current equation to obtain short-circuit impedance; winding space size is determined from the short circuit impedance calculation.
In one embodiment, obtaining a general solution of the terminal voltage calculation model to obtain a short-circuit current equation includes: determining a current component model according to the general solution of the terminal voltage calculation model, wherein the current component model is used for representing the relationship between the short-circuit current and the steady-state component and the transient component; acquiring a first calculation coefficient, and respectively establishing a steady-state component model and a transient component model according to the working condition information and the first calculation coefficient, wherein the first calculation coefficient comprises an attenuation coefficient and a short-circuit impedance phase angle; and obtaining a short-circuit current equation according to the steady-state component model, the transient component model and the current component model.
In one embodiment, substituting the operating condition information into the short-circuit current equation to obtain the short-circuit impedance includes: acquiring working condition information of reclosing twice short circuit, wherein the working condition information comprises short circuit voltage, short circuit current and short circuit phase angle; substituting the short-circuit voltage, the short-circuit current and the short-circuit phase angle into a short-circuit current equation to obtain an equivalent short-circuit impedance change value; and determining the short-circuit impedance according to the equivalent short-circuit impedance change value.
In one embodiment, determining winding space dimensions from short circuit impedance calculations includes: acquiring a second calculation coefficient, and establishing a winding space dimension calculation model according to the second calculation coefficient, wherein the second calculation coefficient comprises frequency, rated current, total turns, potential of each turn, an additional reactance coefficient, an average reactance height and a Rockwell coefficient; substituting the short-circuit impedance into a winding space dimension calculation model, and calculating to obtain the winding space dimension.
In one embodiment, the working condition information is determined according to the waveform of the wave record, wherein the working condition information can comprise voltage information, current information and phase parameters. Specifically, it may be, for example: voltage, current effective value, peak value, fault phase and other parameters. And calculating the impedance value at the time of short circuit according to the read voltage and current data. In operation, the short-circuit current calculation may first determine the terminal voltage u at the time of the transformer short-circuit according to equation (1) 0 ：
Wherein U is 0m Represents the high-voltage side peak voltage, L 0 Representing short-circuit equivalent inductance, 0 0 Indicating the short-circuit current is represented by,
representing the mains voltage phase angle. The general solution can be obtained from formula (1):
and further obtaining a steady-state component model and a transient component model of formula (3):
wherein i' 0 Representing a steady-state component, the variation of which is sinusoidal; i' 0 Representing transient components, the values of which gradually decay to 0 over time, and finally the short-circuit current i 0 Tend to stabilize to i' 0 。Z d Representing an equivalent short circuit impedance from the power supply to the point of failure;
representing the short circuit impedance phase angle, all of which belong to the first calculated coefficients. Attenuation coefficient R 0 /L 0 Affecting the decay time of the transient. Generally, the larger the capacity of the transformer, the larger the system inductance and the longer the transient decay time. Due to the presence of R 0 ＜＜·L 0 There is->
So that the formula (4) can be rewritten based on the formulas (2) and (3) to obtain the short-circuit current equation:
therefore, Z can be calculated according to the working condition information such as voltage, current, phase angle and the like when reclosing twice short circuit d The change condition is that the impedance of the system is not changed and can be based on Z d The change calculates the change of the short-circuit impedance of the transformer, thereby determining the short-circuit impedance. Further, a second calculation coefficient comprising frequency, rated current, total turns, potential per turn, additional reactance coefficient, average reactance height and Rockwell coefficient is obtained, and a winding space dimension calculation model is built. The winding space dimension calculation model can be expressed as formula (5):
wherein f is frequency, and the unit is Hz; rated current I, A; total turns (I and W are the same side winding data) when W is the main tapping; e, e t V/turn per turn potential; h k Average reactance height of two windings; k is added with a reactance coefficient; ρrockwell coefficient; Σd winding space dimensions. Because of f, I, W, e t 、H k Both K, v are constants, and do not change with short-circuit changes, but only the Σd winding space size changes due to deformation of the winding, so the winding space size can be calculated and determined from the short-circuit impedance calculated above by substituting it into equation 5.
Step S140: and determining the deformation condition according to the winding space size.
In one embodiment, the deformation of the windings is determined by calculating the winding space size. For example, whether the winding space size meets the fault size is judged, and if so, the winding is determined to be deformed and not available. Or the space size change of the winding can be obtained according to the space size of the winding, whether the space size change of the winding accords with the fault condition is judged, and if so, the winding is deformed and unavailable is determined; judging whether the dimensional change of the winding space has a fault trend or not, generating early warning information under the condition that the fault trend exists, informing maintenance personnel of timely paying attention, solving the problem in advance, and avoiding the fault of the transformer.
Therefore, the method and the device can acquire the wave recording waveform recorded by the fault wave recording system in real time when the transformer substation keeps running, and analyze and acquire the working condition information of the transformer substation in the winding fault state when the wave recording waveform belongs to the fault state so as to practically restore the winding deformation condition, thereby reducing the loss of manpower, material resources and the like caused by power failure, avoiding the running risk of the power grid caused by the power failure and improving the power supply reliability of the power grid. Furthermore, the recorded wave form of the transformer substation recorded by the fault recording system obtained in real time is used for judging, so that the timeliness of judging the deformation problem is ensured, the judgment can be carried out when the recorded wave form belongs to the fault state, and the problem is rapidly and accurately positioned; meanwhile, the working condition information of the transformer substation is reflected by the wave recording waveform, so that the actual working condition of the transformer winding is practically restored, erroneous judgment is reduced, and the judgment accuracy is improved.
Fig. 2 shows a block diagram of an apparatus for determining transformer winding deformation according to an embodiment. The device 20 for determining transformer winding deformation includes: an acquisition module 21, a decision module 22, a calculation module 23 and a determination module 24. Specifically, the acquisition module 21 is connected to the fault recording system, and is configured to acquire the recording waveform in real time. And the judging module 22 is used for acquiring working condition information of the transformer substation according to the wave recording waveform when the wave recording waveform is determined to belong to the fault state. A calculating module 23, configured to calculate and determine a winding space size according to the working condition information; a determining module 24 for determining the deformation based on the winding space size. The functions of each component are described in detail above, and reference is made to the above for specific details, which are not repeated here.
FIG. 3 illustrates a block diagram of a system for determining transformer winding deformation in accordance with one embodiment. The system 30 in which the deformation of the transformer winding is judged comprises: the transformer winding deformation device 20 and the substation fault logging system 31 are judged as described above. The transformer substation fault wave recording system 31 is connected with the transformer winding deformation judging device 20, and is used for collecting wave recording waveforms generated by the operation of the transformer substation in real time and sending the wave recording waveforms to the transformer winding deformation judging device. The connection manner of the transformer winding deformation device 20 and the transformer substation fault logging system 31 can include, but is not limited to, a wired communication technology or a wireless communication technology. Among these, for wireless communication technologies, there may be, but are not limited to: global mobile communications devices (Global System for Mobile Communication, GSM), enhanced mobile communications technologies (Enhanced Data GSM Environment, EDGE), wideband code division multiple access technology (wideband code division multiple access, W-CDMA), code division multiple access technology (Code division access, CDMA), time division multiple access technology (time division multiple access, TDMA), bluetooth, wireless Fidelity, wiFi (such as american society of electrical and electronic engineers standard IEEE802.11a, IEEE 802.11.11 b, IEEE802.11g, and/or IEEE802.11 n), internet telephony (Voice over internet protocal, voIP), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, wi-Max), other protocols for mail, instant messaging, and short messages, and any other suitable communication protocol, even those not currently developed. Thereby realizing that the transformer winding deformation device 20 can determine the working condition of the transformer winding rapidly and accurately in real time.
In one embodiment, the present application also proposes a computer device comprising a memory and a processor, the memory storing a computer program which, when executed by the processor, causes the processor to perform the steps of: step S110: acquiring a wave recording waveform in real time through a fault wave recording system; step S120: when the waveform of the wave recording is determined to belong to a fault state, working condition information of the transformer substation is obtained according to the waveform of the wave recording; step S130: calculating and determining the space size of the winding according to the working condition information; step S140: and determining the deformation condition according to the winding space size.
FIG. 4 illustrates an internal block diagram of a computer device in one embodiment. The computer device may specifically be a terminal or a server. As shown in fig. 4, the computer device includes a processor, a memory, and a network interface connected by a system bus. The memory includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium of the computer device stores an operating system and may also store a computer program which, when executed by a processor, causes the processor to implement a method of determining transformer winding deformation. The internal memory may also have stored therein a computer program which, when executed by the processor, causes the processor to perform the age identification method. Those skilled in the art will appreciate that the structures shown in FIG. 4 are block diagrams only and do not constitute a limitation of the computer device on which the present aspects apply, and that a particular computer device may include more or less components than those shown, or may combine some of the components, or have a different arrangement of components.
In one embodiment, a computer readable storage medium is provided, storing a computer program which, when executed by a processor, causes the processor to perform the steps of the method of determining transformer winding deformation as described in any of the embodiments above.
Those skilled in the art will appreciate that all or part of the processes in the methods of the above embodiments may be implemented by a computer program for instructing relevant hardware, where the program may be stored in a non-volatile computer readable storage medium, and where the program, when executed, may include processes in the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the various embodiments provided herein may include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), memory bus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. A method of determining transformer winding deformation comprising the steps of:
acquiring a wave recording waveform in real time through a fault wave recording system;
when the wave recording waveform is determined to belong to a fault state, working condition information of the transformer substation is obtained according to the wave recording waveform;
calculating and determining the space size of the winding according to the working condition information;
and determining deformation conditions according to the winding space size.
2. The method of determining transformer winding deformation of claim 1, wherein the determining that the waveform belongs to a fault state comprises:
acquiring the wave recording waveforms comprising a first wave recording waveform and a second wave recording waveform according to a preset frequency;
respectively acquiring voltage information and current information of the first wave recording waveform and the second wave recording waveform;
and when the voltage information and the current information are determined to accord with the short circuit condition, determining that the wave recording waveform belongs to the fault state.
3. The method for determining deformation of a transformer winding according to claim 1, wherein the operating condition information includes voltage information, current information, and phase parameters, and the calculating the winding space size according to the operating condition information includes:
establishing a terminal voltage calculation model according to the voltage information, the current information and the phase parameter;
obtaining a general solution of the terminal voltage calculation model to obtain a short-circuit current equation;
substituting the working condition information into the short-circuit current equation to obtain short-circuit impedance;
and determining the winding space size according to the short circuit impedance calculation.
4. The method for determining transformer winding deformation according to claim 3, wherein the obtaining a general solution of the terminal voltage calculation model to obtain a short-circuit current equation comprises:
determining a current component model according to the general solution of the terminal voltage calculation model, wherein the current component model is used for representing the relationship between short-circuit current and steady-state components and transient components;
acquiring a first calculation coefficient, and respectively establishing a steady-state component model and a transient component model according to the working condition information and the first calculation coefficient, wherein the first calculation coefficient comprises an attenuation coefficient and a short-circuit impedance phase angle;
and obtaining the short-circuit current equation according to the steady-state component model, the transient component model and the current component model.
5. The method for determining transformer winding deformation according to claim 3, wherein said substituting said operating condition information into said short-circuit current equation to obtain a short-circuit impedance comprises:
acquiring working condition information of reclosing twice short circuit, wherein the working condition information comprises short circuit voltage, short circuit current and short circuit phase angle;
substituting the short-circuit voltage, the short-circuit current and the short-circuit phase angle into the short-circuit current equation to obtain an equivalent short-circuit impedance change value;
and determining the short-circuit impedance according to the equivalent short-circuit impedance change value.
6. A method of determining transformer winding deformation as recited in claim 3, wherein said determining said winding space dimension from said short circuit impedance calculation comprises:
acquiring a second calculation coefficient, and establishing a winding space dimension calculation model according to the second calculation coefficient, wherein the second calculation coefficient comprises frequency, rated current, total turns, potential of each turn, an additional reactance coefficient, average reactance height and Rockwell coefficient;
substituting the short circuit impedance into the winding space dimension calculation model, and calculating to obtain the winding space dimension.
7. An apparatus for determining deformation of a transformer winding, comprising:
the acquisition module is used for acquiring the wave recording waveform in real time through the fault wave recording system;
the judging module is used for acquiring working condition information of the transformer substation according to the wave recording waveform when the wave recording waveform is determined to belong to a fault state;
the calculation module is used for calculating and determining the space size of the winding according to the working condition information;
and the determining module is used for determining deformation according to the winding space size.
8. A system for determining transformer winding deformation, comprising:
the apparatus for determining transformer winding deformation of claim 7;
the transformer substation fault wave recording system is connected with the device for judging transformer winding deformation and is used for collecting wave recording waveforms generated by the operation of the transformer substation in real time and sending the wave recording waveforms to the device for judging transformer winding deformation.
9. A computer device comprising a processor and a memory;
the processor is configured to execute a computer program stored in the memory to implement the method of any one of claims 1 to 6.
10. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed by a processor, implements the method according to any of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310078444.6A CN116045796A (en) | 2023-01-15 | 2023-01-15 | Method, device, system, equipment and medium for judging deformation of transformer winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310078444.6A CN116045796A (en) | 2023-01-15 | 2023-01-15 | Method, device, system, equipment and medium for judging deformation of transformer winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116045796A true CN116045796A (en) | 2023-05-02 |
Family
ID=86121818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310078444.6A Pending CN116045796A (en) | 2023-01-15 | 2023-01-15 | Method, device, system, equipment and medium for judging deformation of transformer winding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116045796A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118091326A (en) * | 2024-04-17 | 2024-05-28 | 国网辽宁省电力有限公司丹东供电公司 | Ground fault judging method and system based on current change characteristics |
-
2023
- 2023-01-15 CN CN202310078444.6A patent/CN116045796A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118091326A (en) * | 2024-04-17 | 2024-05-28 | 国网辽宁省电力有限公司丹东供电公司 | Ground fault judging method and system based on current change characteristics |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108537426B (en) | Power equipment running state estimation method and device and computer equipment | |
| CN116045796A (en) | Method, device, system, equipment and medium for judging deformation of transformer winding | |
| US11029344B2 (en) | Sensitivity based Thevenin index for voltage stability assessment considering N-1 contingency | |
| CN110297183B (en) | Method and device for diagnosing turn-to-turn short circuit fault of rotor of synchronous phase modulator and storage medium | |
| JP5456582B2 (en) | Transformer soundness diagnosis method, soundness diagnosis device, and soundness diagnosis program | |
| CN115640895A (en) | Transformer fault prediction method and device and electronic equipment | |
| US10348090B2 (en) | Method of determining a condition of an electrical power network and apparatus therefor | |
| CN108471114B (en) | Power transmission line state evaluation method and device, computer equipment and storage medium | |
| CN109615093A (en) | Repair of Transformer mode determines method and device | |
| CN109375145B (en) | Voltage loss fault monitoring method and device based on three-phase three-wire meter equipment | |
| CN112444697A (en) | Power line information monitoring system and method | |
| CN114859274B (en) | Transformer winding deformation online monitoring method and electronic device | |
| CN116930848A (en) | Current transformer abnormality monitoring method and related device | |
| CN116840614A (en) | Cable line defect sensing and early warning method based on harmonic fluctuation characteristics | |
| CN111044858B (en) | Risk assessment system and method for extra-high voltage converter transformer | |
| CN113281560B (en) | Method and device for acquiring maximum short-circuit current value of in-service transformer | |
| CN101718822B (en) | Method for processing abnormal data of electrical energy quality | |
| CN114924161A (en) | Method and system for analyzing insulation situation of power distribution system | |
| CN111929535B (en) | Method and device for detecting fault direction of direct-current side outlet of alternating-current circuit | |
| CN113792636B (en) | Extra-high voltage direct current transmission converter transformer recessive fault prediction method based on fault wave recording | |
| CN113922325B (en) | Prediction method and device for reclosing short-circuit current of transformer | |
| CN111913135B (en) | Method for identifying deformation faults of transformer winding by Newton iteration method | |
| CN112731261B (en) | Fault detection method and device for electric energy metering equipment, computer equipment and medium | |
| CN116520192B (en) | Grounding information diagnosis method based on tide fingerprint identification | |
| CN116418121B (en) | Substation secondary security system, method, device and computer equipment |
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 |