CN113640628A - Insulation state testing device, method and device of transformer and storage medium - Google Patents
Insulation state testing device, method and device of transformer and storage medium Download PDFInfo
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- CN113640628A CN113640628A CN202110779460.9A CN202110779460A CN113640628A CN 113640628 A CN113640628 A CN 113640628A CN 202110779460 A CN202110779460 A CN 202110779460A CN 113640628 A CN113640628 A CN 113640628A
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
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Abstract
The application relates to an insulation state testing device, method, device and storage medium of a transformer. The device for testing the insulation state of the transformer comprises a controller, data acquisition equipment and stress applying equipment for applying stress to an oil paper insulation sample to be tested; the data acquisition equipment comprises temperature detection equipment for acquiring the winding temperature of the transformer to be measured, vibration measurement equipment for acquiring vibration data of the transformer to be measured and voltage acquisition equipment for acquiring the operating voltage of the transformer to be measured; the controller obtains temperature data transmitted by the temperature detection equipment, vibration data transmitted by the vibration measurement equipment and voltage data transmitted by the voltage acquisition equipment, and instructs the stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the temperature data, the vibration data and the voltage data. By the insulation state testing equipment of the transformer, the insulation state of the transformer can be obtained without damage, and the normal operation of the transformer can be maintained.
Description
Technical Field
The present disclosure relates to the field of transformer detection technologies, and in particular, to an apparatus, a method, a device, and a storage medium for testing an insulation state of a transformer.
Background
The power transformer is a core device of a power grid, the design life of the power transformer reaches 40 years, but the life of the power transformer is affected due to various factors in the operation process in practical use. The accurate evaluation of the insulation state of the power transformer is an important link for ensuring the safe operation of the transformer, and the existing method for evaluating the insulation state of the transformer comprises various detection means such as frequency domain dielectric spectrum, analysis of dissolved gas in oil, partial discharge and the like.
In the implementation process, the inventor finds that at least the following problems exist in the conventional technology: the traditional test method has the problems of high test cost and low test precision.
Disclosure of Invention
In view of the above, it is necessary to provide a high-precision and low-cost apparatus, method, device and storage medium for testing the insulation state of a transformer.
In order to achieve the above object, in one aspect, an embodiment of the present invention provides an insulation state testing apparatus for a transformer, including:
a data acquisition device; the data acquisition equipment comprises temperature detection equipment for acquiring the winding temperature of the transformer to be measured, vibration measurement equipment for acquiring vibration data of the transformer to be measured and voltage acquisition equipment for acquiring the operating voltage of the transformer to be measured;
the stress applying equipment is used for applying stress to the oiled paper insulation sample to be tested;
a controller; the controller obtains temperature data transmitted by the temperature detection equipment, vibration data transmitted by the vibration measurement equipment and voltage data transmitted by the voltage acquisition equipment, and instructs the stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the temperature data, the vibration data and the voltage data.
In one embodiment, the stress applying device comprises a vibration table and a stress test box arranged on the vibration table; an oil paper insulation sample to be tested is arranged in the stress test box;
the controller instructs the stress test box to apply corresponding temperature stress to the oil paper insulation test sample to be tested according to the temperature data; the controller instructs the stress test box to apply corresponding voltage stress to the oil paper insulation test sample to be tested according to the voltage data; and the controller instructs the vibration table to apply corresponding vibration stress to the oil paper insulation sample to be tested according to the vibration data.
In one embodiment, the temperature detection device comprises a temperature measurement optical fiber arranged inside a winding of the transformer to be detected;
the temperature measuring optical fiber obtains temperature values of all parts on the winding and outputs the temperature values to the controller;
and the controller instructs the stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the highest temperature value in the temperature values of all the parts.
In one embodiment, the vibration measurement device comprises a vibration sensor; the voltage acquisition equipment comprises a voltage transformer;
the vibration sensor is arranged on the surface of the oil tank of the transformer to be measured.
On one hand, the embodiment of the invention also provides a method for testing the insulation state of the transformer, which comprises the following steps:
acquiring temperature data transmitted by temperature detection equipment, vibration data transmitted by vibration measurement equipment and voltage data transmitted by voltage acquisition equipment; the temperature detection equipment is used for collecting the winding temperature of the transformer to be detected; the vibration measuring equipment is used for acquiring vibration data of the transformer to be measured; the voltage acquisition equipment is used for acquiring the operating voltage of the transformer to be measured;
and indicating the stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the temperature data, the vibration data and the voltage data.
In one embodiment, the method further comprises the following steps:
and sampling and testing the oiled paper insulation sample to be tested, and confirming the working condition of the transformer to be tested according to the test result.
In one embodiment, the temperature data includes temperature values for various locations on the winding;
the step of indicating stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the temperature data comprises the following steps:
and according to the highest temperature value in the temperature values of all the parts, indicating the stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested.
On one hand, an embodiment of the present invention further provides an insulation state testing apparatus for a transformer, including:
the acquisition module is used for acquiring temperature data transmitted by the temperature detection equipment, vibration data transmitted by the vibration measurement equipment and voltage data transmitted by the voltage acquisition equipment; the temperature detection equipment is used for collecting the winding temperature of the transformer to be detected; the vibration measuring equipment is used for acquiring vibration data of the transformer to be measured; the voltage acquisition equipment is used for acquiring the operating voltage of the transformer to be measured;
and the control module is used for indicating the stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the temperature data, the vibration data and the voltage data.
In one embodiment, the method further comprises the following steps:
and the test module is used for sampling and testing the oiled paper insulation sample to be tested and confirming the working condition of the transformer to be tested according to the test result.
In another aspect, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of any one of the above methods.
One of the above technical solutions has the following advantages and beneficial effects:
according to the insulation state testing equipment of the transformer, the winding temperature, the vibration data and the operating voltage are obtained through the voltage collecting equipment, the vibration measuring equipment and the temperature detecting equipment, then the stress applying equipment is indicated to apply corresponding stress to the oil paper insulation test sample to be tested according to the obtained data information, therefore, the actual working condition of the transformer is simulated in multiple directions, and further the insulation state of the oil paper in the transformer is confirmed to obtain the aging degree of the transformer according to the physical and chemical test result of the oil paper insulation test sample to be tested. By the insulation state testing equipment of the transformer, the insulation state of the transformer can be obtained without damage, and the normal operation of the transformer can be maintained. Meanwhile, temperature stress can be applied to the oil paper insulation test sample to be tested according to the highest temperature value in the winding temperature, so that the problem that the simulation of the temperature stress in the traditional technology is inaccurate, the insulation state of an oil paper insulation test is better than that of the oil paper in an actual transformer, and the running risk can be avoided.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular description of preferred embodiments of the application, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the subject matter of the present application.
FIG. 1 is a first schematic block diagram of an insulation state testing apparatus of a transformer in one embodiment;
FIG. 2 is a second schematic block diagram of an insulation state testing apparatus of a transformer in one embodiment;
FIG. 3 is a first schematic flow chart diagram of a method for testing an insulation state of a transformer in one embodiment;
FIG. 4 is a second schematic flow chart diagram of a method for testing an insulation state of a transformer in one embodiment;
FIG. 5 is a block diagram showing an example of the structure of an insulation state testing apparatus for a transformer;
FIG. 6 is a third schematic block diagram of an insulation state testing apparatus of a transformer in one embodiment;
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
In one embodiment, as shown in fig. 1, there is provided an insulation state testing apparatus of a transformer, including:
a data acquisition device; the data acquisition equipment comprises temperature detection equipment for acquiring the winding temperature of the transformer to be measured, vibration measurement equipment for acquiring vibration data of the transformer to be measured and voltage acquisition equipment for acquiring the operating voltage of the transformer to be measured;
the stress applying equipment is used for applying stress to the oiled paper insulation sample to be tested;
a controller; the controller obtains temperature data transmitted by the temperature detection equipment, vibration data transmitted by the vibration measurement equipment and voltage data transmitted by the voltage acquisition equipment, and instructs the stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the temperature data, the vibration data and the voltage data.
The data acquisition equipment is used for acquiring various data of the transformer to be measured, and the data can comprise winding temperature data, operating vibration data and operating voltage data. The temperature detecting device may be any device capable of detecting the temperature of the winding in the field, such as a temperature sensor. The vibration measuring device may be any device in the art capable of detecting vibration data of the transformer, such as a vibration sensor. The vibration data may include vibration frequency as well as vibration amplitude. The voltage acquisition device may be any device capable of acquiring operating voltage in the field, such as a voltage transformer.
The stress applying device can be any device capable of applying stress to the oiled paper insulation sample to be tested in the field. The stress includes temperature stress, mechanical vibration stress, voltage stress, and the like. The oil paper insulation test sample to be tested receiving the stress comprises insulation paper and transformer oil, and the type of the oil paper insulation test sample to be tested is the same as that of the oil paper insulation test sample to be tested in the transformer to be tested.
The type of the controller is not limited, and may be set according to the actual application, for example, the controller may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; the stress applying device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc., as long as the temperature data transmitted by the temperature detection device, the vibration data transmitted by the vibration measurement device, and the voltage data transmitted by the voltage acquisition device, and instruct the stress applying device to apply corresponding stress to the oil paper insulation test piece to be tested according to the temperature data, the vibration data, and the voltage data.
Specifically, the controller acquires data transmitted by the data acquisition device in real time, specifically including temperature data, vibration data, voltage data and the like. By acquiring the data, the winding temperature, the mechanical vibration data and the operating voltage in the transformer to be tested can be used as test parameters, and the stress application of the oiled paper insulation test sample to be tested is realized. In a specific example, the temperature values at different positions on the winding are different, and for this case, the temperature detection device of the present application includes a temperature measurement optical fiber, which is disposed inside the winding of the transformer to be measured, and is used for transmitting the temperature values at different positions to the controller. The controller may instruct the stress applying device to apply a corresponding temperature stress according to each temperature value. It should be noted that, a physicochemical test can be performed on the oil paper insulation sample to be tested, and the insulation state of the transformer can be obtained according to the result of the physicochemical test, so as to obtain the aging degree of the transformer.
According to the insulation state testing equipment of the transformer, the winding temperature, the vibration data and the operating voltage are obtained through the voltage collecting equipment, the vibration measuring equipment and the temperature detecting equipment, then the stress applying equipment is indicated to apply corresponding stress to the oil paper insulation test sample to be tested according to the obtained data information, therefore, the actual working condition of the transformer is simulated in multiple directions, and further the insulation state of the oil paper in the transformer is confirmed to obtain the aging degree of the transformer according to the physical and chemical test result of the oil paper insulation test sample to be tested. By the insulation state testing equipment of the transformer, the insulation state of the transformer can be obtained without damage, and the normal operation of the transformer can be maintained. Meanwhile, temperature stress can be applied to the oil paper insulation test sample to be tested according to the highest temperature value in the winding temperature, so that the problem that the simulation of the temperature stress in the traditional technology is inaccurate, the insulation state of an oil paper insulation test is better than that of the oil paper in an actual transformer, and the running risk can be avoided.
In one embodiment, as shown in fig. 2, the stress applying apparatus includes a vibration table and a stress test chamber provided on the vibration table; an oil paper insulation sample to be tested is arranged in the stress test box;
the controller instructs the stress test box to apply corresponding temperature stress to the oil paper insulation test sample to be tested according to the temperature data; the controller instructs the stress test box to apply corresponding voltage stress to the oil paper insulation test sample to be tested according to the voltage data; and the controller instructs the vibration table to apply corresponding vibration stress to the oil paper insulation sample to be tested according to the vibration data.
Specifically, the stress test chamber can apply temperature stress and voltage stress at the same time. In one specific example, the stress test chamber applies the voltage stress by introducing a high voltage source. Specifically, the high-voltage source oil paper insulation test sample to be tested is arranged in the stress test box, the stress test box is arranged on the vibration table, and vibration stress can be applied to the oil paper insulation test sample to be tested through the vibration table.
And the controller receives the temperature data and indicates the stress test box to apply temperature stress corresponding to the temperature data to the oil paper insulation sample to be tested according to the temperature data. The controller receives the voltage data and instructs the stress test chamber to apply voltage stress corresponding to the voltage data according to the voltage data. The controller receives the vibration data and instructs the stress test chamber to apply a vibration stress corresponding to the vibration data according to the vibration data.
In one embodiment, the temperature detection device comprises a temperature measurement optical fiber arranged inside a winding of the transformer to be detected;
the temperature measuring optical fiber obtains temperature values of all parts on the winding and outputs the temperature values to the controller;
and the controller instructs the stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the highest temperature value in the temperature values of all the parts.
Specifically, the temperature measuring optical fiber can detect temperature values of different parts on the winding. The controller may instruct the stress applying device to apply the temperature stress corresponding to a highest temperature value among the temperature values according to the highest temperature value. The maximum temperature value is a maximum temperature value among the temperature values at any one time.
The insulation state test equipment of the transformer can apply temperature stress to the oil paper insulation test sample to be tested according to the highest temperature value in the winding temperature, so that the problem that temperature stress simulation in the traditional technology is inaccurate, the insulation state of an oil paper insulation test is better than the insulation state of oil paper in an actual transformer, and running risks can be avoided.
In one embodiment, the vibration measurement device comprises a vibration sensor; the voltage acquisition equipment comprises a voltage transformer;
the vibration sensor is arranged on the surface of the oil tank of the transformer to be measured.
In one embodiment, as shown in fig. 3, there is also provided an insulation state testing method of a transformer, including the steps of:
s310, acquiring temperature data transmitted by temperature detection equipment, vibration data transmitted by vibration measurement equipment and voltage data transmitted by voltage acquisition equipment; the temperature detection equipment is used for collecting the winding temperature of the transformer to be detected; the vibration measuring equipment is used for acquiring vibration data of the transformer to be measured; the voltage acquisition equipment is used for acquiring the operating voltage of the transformer to be measured;
specifically, the temperature data transmitted by the temperature detection device, the vibration data transmitted by the vibration measurement device, and the voltage data transmitted by the voltage acquisition device may be acquired by any means in the art. For example, the data may be acquired through a wireless communication device, or may be acquired through a serial port.
And S320, indicating stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the temperature data, the vibration data and the voltage data.
Specifically, the data transmitted by the data acquisition device is acquired in real time, and specifically includes temperature data, vibration data, voltage data and the like. By acquiring the data, the winding temperature, the mechanical vibration data and the operating voltage in the transformer to be tested can be used as test parameters, and the stress application of the oiled paper insulation test sample to be tested is realized.
In one embodiment, as shown in fig. 4, there is further provided an insulation state testing method of a transformer, including the steps of:
s410, acquiring temperature data transmitted by temperature detection equipment, vibration data transmitted by vibration measurement equipment and voltage data transmitted by voltage acquisition equipment; the temperature detection equipment is used for collecting the winding temperature of the transformer to be detected; the vibration measuring equipment is used for acquiring vibration data of the transformer to be measured; the voltage acquisition equipment is used for acquiring the operating voltage of the transformer to be measured;
and S420, indicating stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the temperature data, the vibration data and the voltage data.
Further comprising the steps of:
s430, sampling and testing the oiled paper insulation sample to be tested, and confirming the working condition of the transformer to be tested according to the test result.
Specifically, any means in the field can be adopted to carry out sampling test on the oil paper insulation test sample, and the working condition of the transformer to be tested can be confirmed through the sampling test result. The working condition of the transformer to be tested comprises the insulation state of the transformer to be tested.
In one embodiment, the temperature data includes temperature values for various locations on the winding;
the step of indicating stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the temperature data comprises the following steps:
and according to the highest temperature value in the temperature values of all the parts, indicating the stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested.
Specifically, the temperature value of different positions on the winding is different, and to this kind of condition, the temperature-detecting equipment of this application includes temperature measurement optic fibre, and it is located inside the winding of the transformer that awaits measuring for the temperature value with different positions transmits for the controller. It should be noted that the maximum temperature value is the maximum temperature value among the temperature values at any time, that is, the stress applying device applies the temperature stress according to the maximum temperature value of the winding at every moment.
It should be understood that although the various steps in the flow charts of fig. 3-4 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 3-4 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, as shown in fig. 5, there is provided an insulation state testing apparatus of a transformer, including: an acquisition module and a control module, wherein:
the acquisition module is used for acquiring temperature data transmitted by the temperature detection equipment, vibration data transmitted by the vibration measurement equipment and voltage data transmitted by the voltage acquisition equipment; the temperature detection equipment is used for collecting the winding temperature of the transformer to be detected; the vibration measuring equipment is used for acquiring vibration data of the transformer to be measured; the voltage acquisition equipment is used for acquiring the operating voltage of the transformer to be measured;
and the control module is used for indicating the stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the temperature data, the vibration data and the voltage data.
In one embodiment, the method further comprises the following steps:
and the test module is used for sampling and testing the oiled paper insulation sample to be tested and confirming the working condition of the transformer to be tested according to the test result.
For the specific definition of the insulation state testing device of the transformer, reference may be made to the above definition of the insulation state testing method of the transformer, and details are not described herein again. Each module in the insulation state testing apparatus of the transformer may be wholly or partially implemented by software, hardware, or a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring temperature data transmitted by temperature detection equipment, vibration data transmitted by vibration measurement equipment and voltage data transmitted by voltage acquisition equipment; the temperature detection equipment is used for collecting the winding temperature of the transformer to be detected; the vibration measuring equipment is used for acquiring vibration data of the transformer to be measured; the voltage acquisition equipment is used for acquiring the operating voltage of the transformer to be measured;
and indicating the stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the temperature data, the vibration data and the voltage data.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and sampling and testing the oiled paper insulation sample to be tested, and confirming the working condition of the transformer to be tested according to the test result.
For further explaining the technical scheme of the present application, a specific example is specifically described below, please refer to fig. 6, in which 1 is a transformer to be tested, 2 is a winding of the transformer to be tested, 3 is a temperature measuring optical fiber buried in a winding wire, the temperature measuring optical fiber demodulates a temperature signal of the winding through a signal conditioner 4, and 5 is a stress test box for placing an oil paper insulation test article, the temperature in the test box is adjustable, and a test voltage can be introduced; 6, a voltage transformer is used for obtaining an operating voltage signal of the tested transformer; 7, a vibration sensor is arranged on the surface of the oil tank of the tested transformer, and can obtain mechanical vibration data when the tested transformer runs; the temperature, voltage and vibration signals are connected to the signal controller 8; 9 is a vibration table, 10 is a high-voltage source, and an oil paper insulation sample 11 comprises insulation paper and transformer oil, has the same type and specification as the transformer to be tested, and is placed in a test box.
The winding temperature is the highest point of the temperature of the transformer to be tested in actual operation and is also the most key factor influencing the aging degree of the oil paper insulation, so that the real-time highest point of the temperature of the winding is obtained through optical fiber temperature measurement, and the signal is sent to the signal controller to be used for controlling the temperature in the test box, so that the temperature of the test box and the temperature hot point of the winding of the transformer to be tested have the same temperature condition;
in addition, the vibration sensor placed outside the oil tank of the transformer to be tested is used for measuring mechanical vibration signals, and the vibration signals are sent to the signal controller to control the vibration table at the bottom of the test box, so that the vibration amplitude of the test table and the mechanical vibration amplitude of the transformer to be tested are the same;
further, this application sends into signal controller through the voltage signal who obtains with the transformer voltage transformer measurement that awaits measuring for the output voltage amplitude of control high voltage source reaches the electric field strength that the interior oil paper insulation test article of proof box bore and the unanimous purpose of the electric field strength that the interior oil paper insulation of the transformer that awaits measuring bore.
Through the steps, the purpose that the same operation state as the oil paper insulation operation state in the transformer is achieved by using external equipment is achieved. When the oil paper insulation state of the transformer to be measured needs to be measured, sampling measurement is carried out from the test box, parameters such as dielectric response, DP value measurement and the like which cannot be measured under the condition that the transformer is electrified are measured, and because the stress borne by an oil paper insulation sample in the test box is consistent with that of the transformer to be measured, the aging degree and the insulation state of the oil paper insulation sample are equal to the same state as that of the insulation in the transformer to be measured, the problems of transformer shutdown, core lifting and sampling are avoided, and simple and nondestructive measurement of the oil paper insulation state of the transformer can be realized.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile 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), Rambus DRAM (RDRAM), and interface DRAM (DRDRAM).
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An insulation state testing apparatus of a transformer, comprising:
a data acquisition device; the data acquisition equipment comprises temperature detection equipment for acquiring the winding temperature of the transformer to be measured, vibration measurement equipment for acquiring vibration data of the transformer to be measured and voltage acquisition equipment for acquiring the operating voltage of the transformer to be measured;
the stress applying equipment is used for applying stress to the oiled paper insulation sample to be tested;
a controller; the controller acquires the temperature data transmitted by the temperature detection equipment, the vibration data transmitted by the vibration measurement equipment and the voltage data transmitted by the voltage acquisition equipment, and instructs the stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the temperature data, the vibration data and the voltage data.
2. The insulation state testing apparatus of a transformer according to claim 1, wherein the stress applying apparatus includes a vibration table and a stress test chamber provided on the vibration table; the oil paper insulation test sample to be tested is arranged in the stress test box;
the controller instructs the stress test box to apply corresponding temperature stress to the oil paper insulation sample to be tested according to the temperature data; the controller instructs the stress test box to apply corresponding voltage stress to the oil paper insulation sample to be tested according to the voltage data; and the controller instructs the vibration table to apply corresponding vibration stress to the oil paper insulation sample to be tested according to the vibration data.
3. The insulation state testing apparatus of a transformer according to claim 1, wherein the temperature detecting apparatus includes a temperature measuring optical fiber provided inside a winding of the transformer to be tested;
the temperature measuring optical fiber obtains temperature values of all parts on the winding and outputs the temperature values to the controller;
and the controller instructs the stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the highest temperature value in the temperature values of all the parts.
4. The insulation state testing apparatus of a transformer according to claim 1, wherein the vibration measuring apparatus comprises a vibration sensor; the voltage acquisition equipment comprises a voltage transformer;
the vibration sensor is arranged on the surface of the oil tank of the transformer to be tested.
5. A method for testing the insulation state of a transformer is characterized by comprising the following steps:
acquiring temperature data transmitted by temperature detection equipment, vibration data transmitted by vibration measurement equipment and voltage data transmitted by voltage acquisition equipment; the temperature detection equipment is used for collecting the winding temperature of the transformer to be detected; the vibration measuring equipment is used for acquiring vibration data of the transformer to be measured; the voltage acquisition equipment is used for acquiring the operating voltage of the transformer to be detected;
and indicating stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the temperature data, the vibration data and the voltage data.
6. The insulation state testing method of a transformer according to claim 5, further comprising the steps of:
and sampling and testing the oiled paper insulation sample to be tested, and confirming the working condition of the transformer to be tested according to the test result.
7. The insulation state testing method of a transformer according to claim 5, wherein the temperature data includes temperature values of respective portions on the winding;
the step of indicating stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the temperature data comprises the following steps:
and according to the highest temperature value in the temperature values of all the parts, indicating the stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested.
8. An insulation state testing device of a transformer, characterized by comprising:
the acquisition module is used for acquiring temperature data transmitted by the temperature detection equipment, vibration data transmitted by the vibration measurement equipment and voltage data transmitted by the voltage acquisition equipment; the temperature detection equipment is used for collecting the winding temperature of the transformer to be detected; the vibration measuring equipment is used for acquiring vibration data of the transformer to be measured; the voltage acquisition equipment is used for acquiring the operating voltage of the transformer to be detected;
and the control module is used for indicating the stress applying equipment to apply corresponding stress to the oil paper insulation sample to be tested according to the temperature data, the vibration data and the voltage data.
9. The insulation state testing apparatus of a transformer according to claim 8, further comprising:
and the test module is used for sampling and testing the oil paper insulation sample to be tested and confirming the working condition of the transformer to be tested according to the test result.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 5 to 7.
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| CN108107291A (en) * | 2017-12-15 | 2018-06-01 | 哈尔滨理工大学 | A kind of transformer oil paper insulation is multifactor to combine ageing test apparatus and its life-span prediction method |
| US20190041450A1 (en) * | 2015-12-01 | 2019-02-07 | Yandong LV | An intelligent assessment method of main insulation condition of transformer oil paper insulation |
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| CN101957423A (en) * | 2010-09-16 | 2011-01-26 | 中国电力科学研究院 | Device for testing insulating property of high-voltage oiled paper |
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Application publication date: 20211112 |