CN112578242A - Method and system for determining breakdown voltage of transformer oil paper insulation system - Google Patents
Method and system for determining breakdown voltage of transformer oil paper insulation system Download PDFInfo
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- CN112578242A CN112578242A CN202011419329.3A CN202011419329A CN112578242A CN 112578242 A CN112578242 A CN 112578242A CN 202011419329 A CN202011419329 A CN 202011419329A CN 112578242 A CN112578242 A CN 112578242A
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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
Abstract
The embodiment of the invention provides a method and a system for determining breakdown voltage of an oil paper insulation system of a transformer, a storage medium and an electronic device, wherein the method comprises the following steps: placing a target insulating material included in a transformer oilpaper insulating system between a first electrode and a second electrode included in an electrode device; placing the electrode equipment with the target insulating material in temperature control equipment, and adjusting the temperature in the electrode equipment by using the temperature control equipment; under the condition that the temperature in the electrode equipment is determined to reach the target temperature value, connecting a first outgoing line with a first end, connecting a second outgoing line with a second end, and providing voltage between a first electrode and a second electrode by using high-voltage equipment; and increasing the voltage provided by the high-voltage device until the target insulating material is broken down, and determining the voltage for breaking down the target insulating material as the breakdown voltage of the target insulating material. The invention solves the problem that the insulation state of the transformer cannot be effectively evaluated in the related technology.
Description
Technical Field
The embodiment of the invention relates to the field of power equipment evaluation, in particular to a method and a system for determining breakdown voltage of a transformer oil paper insulation system, a storage medium and an electronic device.
Background
The power transformer is the core of energy conversion and transmission in power transmission and distribution, is the most important, critical and expensive equipment in power transmission and transformation equipment, and particularly, the operation reliability of the oil-immersed power transformer which is most widely applied is directly related to the economic operation and the safety and stability of a power system. The real-time insulation state evaluation, fault diagnosis and fault prediction of the power transformer are hot spots for the evaluation and research of the transformer running state at home and abroad at present, wherein the insulation state evaluation is particularly taken as a main research direction. The insulation of the power transformer is an insulation system made of transformer insulation materials, which is a basic condition for normal work and operation of the transformer, and in the operation process of the transformer, the oil paper insulation system in the transformer is influenced by factors such as heat, electricity and the like for a long time, which may cause gradual reduction of self insulation and mechanical properties and possible transformer failure, so that insulation performance tests are required to be performed regularly to ensure safe and stable operation of the power transformer.
According to the GB/T1094.3 regulations on the insulation test of the power transformer, the 220kV oil-immersed power transformer needs to be subjected to an external construction frequency withstand voltage test, but the test is generally carried out under factory test conditions, the test environment temperature is normal temperature (20-30 ℃), the transformer is in a non-running state, and the internal temperature of the transformer is uniformly distributed and is the same as or similar to the environment temperature. The temperature variation range of an oil paper insulation system in the transformer is about-20 ℃ to +80 ℃ under different environmental temperatures and load conditions, so that the condition that the insulation margin of the transformer meets the requirement at normal temperature and the insulation margin does not meet the requirement at high temperature is easily caused, namely the actual running state of the transformer cannot be reflected in the insulation performance test of the power transformer at present, and the reliability of the insulation state evaluation of the transformer is difficult to guarantee.
Aiming at the problem that the insulation state of the transformer cannot be effectively evaluated in the related technology, no effective solution is available at present.
Disclosure of Invention
The embodiment of the invention provides a method and a system for determining breakdown voltage of an oil paper insulation system of a transformer, a storage medium and an electronic device, which are used for at least solving the problem that the insulation state of the transformer cannot be effectively evaluated in the related technology.
According to an embodiment of the invention, a method for determining the breakdown voltage of a transformer oil paper insulation system is provided, which comprises the following steps: placing a target insulating material included in a transformer oil paper insulating system between a first electrode and a second electrode included in an electrode device, wherein the electrode device includes the first electrode, the second electrode, and an oil tank, the first electrode and the second electrode are placed in the oil tank, and a first lead line of the first electrode is configured to be connected to a first end of a high voltage device located outside the oil tank, a second lead line of the second electrode is configured to be connected to a second end of the high voltage device, and the high voltage device supplies a voltage within a predetermined voltage range through the first end and the second end; placing the electrode device with the target insulating material in a temperature control device, and adjusting the temperature in the electrode device by using the temperature control device; connecting the first lead wire with the first end and the second lead wire with the second end under the condition that the temperature in the electrode equipment is determined to reach a target temperature value, and providing voltage between the first electrode and the second electrode by utilizing the high-voltage equipment; increasing the voltage provided by the high voltage device until the target insulating material is broken down, determining the voltage for breaking down the target insulating material as the breakdown voltage of the target insulating material.
In one exemplary embodiment, in a case where it is determined that the temperature inside the electrode device reaches a target temperature value, connecting the first lead line with the first terminal, connecting the second lead line with the second terminal, and providing a voltage between the first electrode and the second electrode using the high voltage device includes: taking the electrode equipment out of the temperature control equipment under the condition that the temperature in the electrode equipment is determined to reach a target temperature value; connecting the first lead line to the first end and the second lead line to the second end, and providing a voltage between the first electrode and the second electrode using the high voltage device.
In an exemplary embodiment, after placing the electrode device with the target insulating material placed therein in a temperature control device, the method further comprises: leading the first leading-out wire out of the temperature control equipment through a first through hole arranged in the temperature control equipment, and leading the second leading-out wire out of the temperature control equipment through a second through hole arranged in the temperature control equipment; connecting the first outgoing line to the first end and the second outgoing line to the second end; adjusting the temperature within the electrode apparatus with the temperature control apparatus; providing a voltage between the first electrode and the second electrode with the high voltage device upon determining that the temperature within the electrode device reaches a target temperature value; increasing the voltage provided by the high voltage device until the target insulating material is broken down, determining the voltage for breaking down the target insulating material as the breakdown voltage of the target insulating material.
In an exemplary embodiment, after placing the target insulation material comprised in the transformer oil paper insulation system between a first electrode and a second electrode comprised in the electrode arrangement, the method further comprises: wrapping a heating tape and a cooler on the electrode device, and connecting the first outgoing line with the first end and the second outgoing line with the second end; adjusting a temperature within the electrode apparatus by the heating belt or the cooler; providing a voltage between the first electrode and the second electrode with the high voltage device upon determining that the temperature within the electrode device reaches a target temperature value; increasing the voltage provided by the high voltage device until the target insulating material is broken down, determining the voltage for breaking down the target insulating material as the breakdown voltage of the target insulating material.
In one exemplary embodiment, increasing the voltage provided by the high voltage device until the target insulating material is broken down, the determining the voltage to break down the target insulating material as the breakdown voltage of the target insulating material comprises: increasing the voltage provided by the high voltage device at a predetermined rate, wherein the predetermined rate allows for adjustment, until the target insulating material is broken down, determining the voltage at which the target insulating material is broken down as the breakdown voltage of the target insulating material.
In one exemplary embodiment, the target insulating material includes: the oil-immersed paperboard is obtained by the following treatment: performing target treatment on original transformer oil to obtain first transformer oil; placing the first transformer oil in air for moisture absorption treatment to obtain second transformer oil; placing an original insulating paperboard with a preset size in a vacuum drying box to dry the original insulating paperboard to obtain a first insulating paperboard; heating the second transformer oil to a target temperature, and standing the first insulation paper board in the heated second transformer oil for a target time to obtain the oil-immersed paper board.
According to another embodiment of the present invention, there is also provided a system for determining the breakdown voltage of a transformer paper oil insulation system, including: an electrode device, wherein the electrode device comprises a first electrode, a second electrode and an oil tank, a target insulating material included in a transformer oil paper insulating system is placed between the first electrode and the second electrode, the first electrode and the second electrode are placed in the oil tank, a first leading-out wire of the first electrode is configured to be connected with a first end of a high-voltage device located outside the oil tank, and a second leading-out wire of the second electrode is configured to be connected with a second end of the high-voltage device; a temperature control device, wherein the temperature control device is configured to regulate a temperature within the electrode device; the high voltage device, wherein the high voltage device provides a voltage within a predetermined voltage range through the first terminal and the second terminal; a measuring device, wherein the measuring device is configured to measure a state of the target insulating material and determine a voltage to break down the target insulating material as a breakdown voltage of the target insulating material.
In one exemplary embodiment, the temperature control device includes a first through hole and a second through hole, wherein the first through hole is configured to lead out the first lead-out wire to the outside of the temperature control device after the electrode device on which the target insulating material is placed in the temperature control device; the second through hole is configured to lead out the second lead-out wire to the outside of the temperature control device after the electrode device on which the target insulating material is placed in the temperature control device.
According to a further embodiment of the present invention, there is also provided a computer-readable storage medium having a computer program stored thereon, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
According to yet another embodiment of the present invention, there is also provided an electronic device, including a memory in which a computer program is stored and a processor configured to execute the computer program to perform the steps in any of the above method embodiments.
According to the invention, based on the voltage withstand test of the transformer insulation system under the condition of approaching the actual working temperature, the actual working state of the transformer insulation system can be more accurately reflected, the problem that the insulation state of the transformer cannot be effectively evaluated due to the fact that the actual running state of the transformer cannot be reflected by a test method in the related technology is solved, and the effect of effectively evaluating the insulation state of the transformer is further achieved.
Drawings
FIG. 1 is a block diagram of a hardware structure of a method for determining breakdown voltage of a transformer paper-oil insulation system according to an embodiment of the invention;
FIG. 2 is a flow chart of a method of determining breakdown voltage of a transformer paper oil insulation system according to an embodiment of the present invention;
FIG. 3 is a diagram of a system architecture for determining breakdown voltage of a transformer paper oil insulation system in accordance with an embodiment of the present invention;
fig. 4 is a diagram of a preferred electrode apparatus structure according to an embodiment of the present invention;
FIG. 5 is a pictorial view of a preferred electrode apparatus in accordance with an embodiment of the present invention;
FIG. 6 is a pictorial view of a preferred temperature control device in accordance with an embodiment of the present invention;
FIG. 7 is a pictorial view of a preferred voltage withstand testing apparatus in accordance with an embodiment of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in conjunction with the embodiments.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The method embodiments provided in the embodiments of the present application may be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking the operation on a mobile terminal as an example, fig. 1 is a hardware structure block diagram of the mobile terminal of the method for determining the breakdown voltage of the transformer oil paper insulation system according to the embodiment of the invention. As shown in fig. 1, the mobile terminal may include one or more (only one shown in fig. 1) processors 102 (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA), and a memory 104 for storing data, wherein the mobile terminal may further include a transmission device 106 for communication functions and an input-output device 108. It will be understood by those skilled in the art that the structure shown in fig. 1 is only an illustration, and does not limit the structure of the mobile terminal. For example, the mobile terminal may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.
The memory 104 may be used to store a computer program, for example, a software program and a module of an application software, such as a computer program corresponding to the method for determining the breakdown voltage of the transformer paper-oil insulation system in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, so as to implement the method described above. The memory 104 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the mobile terminal over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a Network adapter (NIC), which can be connected to other Network devices through a base station so as to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.
In this embodiment, a method for determining a breakdown voltage of a transformer paper-oil insulation system is provided, and fig. 2 is a flowchart of a method for determining a breakdown voltage of a transformer paper-oil insulation system according to an embodiment of the present invention, as shown in fig. 2, the flowchart includes the following steps:
step S202, placing a target insulating material included in a transformer oil paper insulating system between a first electrode and a second electrode included in an electrode device, wherein the electrode device comprises the first electrode, the second electrode and an oil tank, the first electrode and the second electrode are placed in the oil tank, a first outgoing line of the first electrode is configured to be connected with a first end of a high-voltage device located outside the oil tank, a second outgoing line of the second electrode is configured to be connected with a second end of the high-voltage device, and the high-voltage device provides a voltage within a preset voltage range through the first end and the second end;
step S204, placing the electrode equipment with the target insulating material in temperature control equipment, and adjusting the temperature in the electrode equipment by using the temperature control equipment;
step S206, under the condition that the temperature in the electrode equipment is determined to reach the target temperature value, connecting the first leading-out wire with the first end, connecting the second leading-out wire with the second end, and providing voltage between the first electrode and the second electrode by using the high-voltage equipment;
and step S208, increasing the voltage provided by the high-voltage equipment until the target insulating material is broken down, and determining the voltage for breaking down the target insulating material as the breakdown voltage of the target insulating material.
Through the steps, the voltage withstanding test is carried out on the transformer insulation system under the condition that the actual working temperature is close to, so that the actual working state of the transformer insulation system can be more accurately reflected, the problem that the insulation state of the transformer cannot be effectively evaluated due to the fact that the actual running state of the transformer cannot be reflected by a test method in the related technology is solved, and the effect of effectively evaluating the insulation state of the transformer is achieved.
Among them, the device that performs the above operation may be a device having a capability of automatically performing the operation in each step described above, for example, a breakdown voltage determination device, a breakdown voltage determination processor, or the like, or a machine having a similar processing capability.
The transformer oil paper insulation system in the above embodiment may be an insulation system of a power transformer or a special transformer, wherein the power transformer may include an oil-immersed transformer, a dry-type transformer, or the like, or other power equipment, but is not limited thereto. The following description is given by taking the oil-immersed paper board in the oil-immersed transformer as an example (which is only an exemplary illustration, and other devices or modules may also perform the above operations in actual operation):
in the above embodiment, the oil-impregnated paper board may be placed between two electrodes of the electrode device, the electrode device is slowly placed in the temperature control device to prevent oil in an oil tank included in the electrode device from overflowing, and the temperature of the temperature control device is set to make the temperature of the oil-impregnated paper board approach to a normal working temperature, for example, under different environmental temperatures and load conditions, the temperature change range of the oil-impregnated paper board inside the transformer may reach-20 ℃ to +80 ℃, whereas the prior art is a test performed at a normal temperature (20 ℃ to 30 ℃); the first lead-out wire and the second lead-out wire of the electrode device are respectively externally connected with a high-voltage device, the voltage-resistant capability of the oil-immersed paperboard material can be determined by adjusting the output voltage of the high-voltage device until the oil-immersed paperboard material is broken down, and the voltage-resistant capability of the oil-immersed paperboard material in a state close to the actual working state can be finally evaluated, so that the problem that the actual running state of the transformer cannot be reflected in the voltage-resistant performance test of the transformer insulation system in the related technology is solved, and the effect of effectively evaluating the insulation state of the transformer is achieved.
In an alternative embodiment, in the case where it is determined that the temperature within the electrode device reaches a target temperature value, connecting the first lead line to the first terminal, connecting the second lead line to the second terminal, and providing a voltage between the first electrode and the second electrode using the high voltage device includes: taking the electrode equipment out of the temperature control equipment under the condition that the temperature in the electrode equipment is determined to reach a target temperature value; connecting the first lead line to the first end and the second lead line to the second end, and providing a voltage between the first electrode and the second electrode using the high voltage device. In this embodiment, after the temperature in the electrode equipment reaches the target temperature value through the temperature control equipment, the electrode equipment is taken out from the temperature control equipment, for example, a high-low temperature test chamber may be used to control the temperature of the electrode equipment so that the temperature of the electrode equipment reaches the target value, and then the electrode equipment is taken out from the high-low temperature test chamber, optionally, in practical application, when the temperature reaches the target value, the electrode equipment should be taken out immediately for a subsequent voltage withstand test, and meanwhile, in consideration of the temperature recovery problem, a certain margin needs to be reserved for the temperature; after the electrode equipment is taken out of the high-low temperature test box, the first lead wire and the second lead wire of the electrode equipment are respectively connected to the first end and the second end of high-voltage equipment, and the high-voltage equipment provides voltage for the first electrode and the second electrode.
In an alternative embodiment, after placing the electrode device with the target insulating material placed therein in a temperature control device, the method further comprises: leading the first leading-out wire out of the temperature control equipment through a first through hole arranged in the temperature control equipment, and leading the second leading-out wire out of the temperature control equipment through a second through hole arranged in the temperature control equipment; connecting the first outgoing line to the first end and the second outgoing line to the second end; adjusting the temperature within the electrode apparatus with the temperature control apparatus; providing a voltage between the first electrode and the second electrode with the high voltage device upon determining that the temperature within the electrode device reaches a target temperature value; increasing the voltage provided by the high voltage device until the target insulating material is broken down, determining the voltage for breaking down the target insulating material as the breakdown voltage of the target insulating material. In this embodiment, after the electrode device with the target insulating material placed thereon is placed in a temperature control device (e.g., a high-low temperature test chamber), the first and second lead-out wires are led out of the temperature control device through the first and second through holes disposed in the temperature control device, for example, the first and second lead-out wires of the electrode are led out of the high-low temperature test chamber through the first and second through holes of the sidewall of the high-low temperature test chamber, optionally, in practical applications, the first and second through holes may be two independent through holes or may be the same through hole, but in practical applications, if one through hole is used, insulation between the first lead-out wire and the second lead-out wire needs to be paid attention to ensure safety; after the first and second outgoing lines are led out of the high-low temperature test chamber, the first and second outgoing lines are respectively connected with a first end and a second end of high-voltage equipment outside the high-low temperature test chamber, then the temperature of the high-low temperature test chamber is adjusted to enable the temperature in the electrode equipment to reach a target value, and the high-voltage equipment is used for providing voltage for the first and second electrodes until a target insulating material is broken down, so that the voltage endurance capacity of the target insulating material can be determined.
In an alternative embodiment, after placing the target insulation material comprised in the transformer oil paper insulation system between a first electrode and a second electrode comprised in the electrode arrangement, the method further comprises: wrapping a heating tape and a cooler on the electrode device, and connecting the first outgoing line with the first end and the second outgoing line with the second end; adjusting a temperature within the electrode apparatus by the heating belt or the cooler; providing a voltage between the first electrode and the second electrode with the high voltage device upon determining that the temperature within the electrode device reaches a target temperature value; increasing the voltage provided by the high voltage device until the target insulating material is broken down, determining the voltage for breaking down the target insulating material as the breakdown voltage of the target insulating material. In this embodiment, after the transformer oil paper insulation system is placed between the first electrode and the second electrode of the electrode device, the electrode device is wrapped by the heating belt and the cooler, the temperature of the oil tank included in the electrode device is directly changed by the heating belt or the cooler, and the temperature of the transformer oil in the oil tank is further controlled, for example, a complete set of temperature control system can be formed by adopting devices such as heating equipment, refrigeration equipment, a contactor, and a temperature sensor, the heating or cooling mode is generally that a plate heat exchanger is used for heat exchange, and the temperature in the oil tank is controlled by the temperature sensor; and after the temperature in the electrode equipment reaches a target temperature value, the high-voltage equipment is utilized to provide voltage for the first electrode and the second electrode until the target insulating material is broken down, and the voltage-resisting capacity of the target insulating material can be determined.
In an alternative embodiment, increasing the voltage provided by the high voltage device until the target insulating material is broken down, the determining the voltage to break down the target insulating material as the breakdown voltage of the target insulating material comprises: increasing the voltage provided by the high voltage device at a predetermined rate, wherein the predetermined rate allows for adjustment, until the target insulating material is broken down, determining the voltage at which the target insulating material is broken down as the breakdown voltage of the target insulating material. In this embodiment, the voltage may be slowly increased at a rate of 2.0kV/s until the target insulation material is broken down to determine the voltage value as the breakdown voltage value of the target insulation material, and in practical applications, the output voltage value of the high voltage device may also be slowly adjusted at other rates.
In an alternative embodiment, the target insulating material comprises: the oil-immersed paperboard is obtained by the following treatment: performing target treatment on original transformer oil to obtain first transformer oil; placing the first transformer oil in air for moisture absorption treatment to obtain second transformer oil; placing an original insulating paperboard with a preset size in a vacuum drying box to dry the original insulating paperboard to obtain a first insulating paperboard; heating the second transformer oil to a target temperature, and standing the first insulation paper board in the heated second transformer oil for a target time to obtain the oil-immersed paper board. In this embodiment, 25# transformer oil may be adopted, and the vacuum oil filter is used to dehydrate, degas, filter and remove impurities from the transformer oil to meet the industrial oil standard, and then a part of the oil sample is sealed and stored for use as the first transformer oil, and the other part of the oil sample is placed in the air for moisture absorption treatment to obtain the humidified transformer oil as the second transformer oil; the method comprises the steps of cutting an insulating paperboard with the thickness of 0.5mm and 1mm to manufacture a round sample (after multiple tests, the diameter of the sample is not 3 times of the diameter of an electrode, edge creepage can be avoided), placing the insulating paperboard in a vacuum drying box, carrying out vacuum drying for a plurality of hours at the temperature of 105 ℃ (the temperature is slightly higher than 100 ℃, fully vaporizing moisture in the paperboard and preventing aging of the paperboard), heating filtered transformer oil to 90 ℃ (heating the transformer oil after moisture absorption treatment, directly heating the transformer oil after only filtration treatment, then carrying out oil immersion treatment on the insulating paperboard at 90 ℃, standing for 3-4 hours, fully immersing the paperboard in oil and reducing air bubbles remained in the paperboard, thus obtaining an oil paper sample, and finally placing the oil paper sample into a drying dish for storage for later use.
It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
In this embodiment, a system for determining a breakdown voltage of a transformer paper-oil insulation system is further provided, and fig. 3 is a block diagram of a system for determining a breakdown voltage of a transformer paper-oil insulation system according to an embodiment of the present invention, as shown in fig. 3, the system includes:
an electrode device 302, wherein the electrode device comprises a first electrode, a second electrode and a fuel tank, the first electrode and the second electrode are used for placing target insulating materials included in a transformer oil paper insulating system therebetween, the first electrode and the second electrode are placed in the fuel tank, a first lead wire of the first electrode is configured to be connected with a first end of a high-voltage device located outside the fuel tank, and a second lead wire of the second electrode is configured to be connected with a second end of the high-voltage device;
a temperature control device 304, wherein the temperature control device is configured to regulate a temperature within the electrode device;
a high voltage device 306, wherein the high voltage device provides a voltage within a predetermined voltage range through the first terminal and the second terminal;
a measuring device 308 for measuring a state of the target insulating material and determining a voltage to break down the target insulating material as a breakdown voltage of the target insulating material.
The following illustrates the specific functions of each part:
fig. 4 is a structural diagram of a preferred electrode device according to an embodiment of the present invention, wherein the numbers in fig. 4 refer to the following: 1-an outgoing line; 2-an insulating sleeve; 3-oil tank cover; a 4-conductive band; 5-edge support; 6-a conductive sleeve; 7-a test electrode; 8-a nut; 9-oil tank. As shown in fig. 4, the electrode apparatus includes a first electrode, a second electrode, and a tank, between which a target insulation material included in a transformer paper oil insulation system is placed, the first electrode and the second electrode being placed in the tank, and a first lead line of the first electrode being configured to be connected to a first end of a high voltage apparatus located outside the tank, and a second lead line of the second electrode being configured to be connected to a second end of the high voltage apparatus.
For a clearer explanation of the electrode device, the electrode device is specifically described in conjunction with a physical diagram of the electrode device, and fig. 5 is a physical diagram of a preferred electrode device according to an embodiment of the present invention. The whole electrode equipment comprises a copper electrode and an oil tank, wherein the copper electrode is fixed on an oil tank top cover, the target insulating material is fixed between the two copper electrodes, an electrode lead-out wire is connected with external high-voltage equipment through a sleeve for a withstand voltage test, and the copper electrode and the target insulating material are both immersed in transformer oil.
The temperature control device 304 is used for adjusting the temperature inside the electrode device, and optionally, in practical applications, a programmable high-low temperature damp-heat test chamber may be used, the temperature control range of the temperature control chamber is-70 ℃ to +150 ℃, and the internal volume of the temperature control chamber is 1m × 1m × 1m, for the purpose of more clearly describing the temperature control device, the temperature control device is specifically described in conjunction with a physical diagram of the temperature control device, as shown in fig. 6, a preferred physical diagram of the temperature control device according to an embodiment of the present invention, and a programmable device is provided outside the temperature control device for adjusting the temperature inside the temperature control device.
A high voltage device 306 for providing a voltage in a predetermined voltage range through the first and second terminals, and a measuring device 308 for measuring a state of the target insulating material and determining a voltage for breaking down the target insulating material as a breakdown voltage of the target insulating material. Alternatively, in practical applications, the high voltage device and the measuring device may be integrated together to form a voltage withstand test device, which can both provide the high voltage and display the measurement results to determine the breakdown voltage value. In order to more clearly illustrate the high voltage device, the measuring device or the voltage withstand test device integrating the high voltage and the measuring function, particularly in combination with the physical diagram of the device, fig. 7 is a physical diagram of a preferred voltage withstand test device according to an embodiment of the present invention, wherein the first and second terminals of the device are connected to the first and second outgoing lines of the aforementioned electrode device by slow adjustment to achieve a voltage within a predetermined voltage range.
In an optional embodiment, the temperature control device comprises a first through hole and a second through hole, wherein the first through hole is configured to lead the first lead-out wire out of the temperature control device after the electrode device with the target insulating material placed therein is placed in the temperature control device; the second through hole is configured to lead out the second lead-out wire to the outside of the temperature control device after the electrode device on which the target insulating material is placed in the temperature control device. In this embodiment, the first through hole and the second through hole may be disposed at a side wall of the temperature control device, and optionally, in practical applications, the first through hole and the second through hole may be two independent through holes or may be the same through hole, but in applications, if one through hole is shared, attention needs to be paid to the insulation problem between the first outgoing line and the second outgoing line to ensure safety.
Embodiments of the present invention also provide a computer-readable storage medium having a computer program stored thereon, wherein the computer program is arranged to perform the steps of any of the above-mentioned method embodiments when executed.
In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.
In an exemplary embodiment, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary embodiments, and details of this embodiment are not repeated herein.
The method and the system for determining the breakdown voltage of the transformer oil paper insulation system can more accurately reflect the actual working state of the transformer insulation system, solve the problem that the test method in the related technology cannot reflect the actual running state of the transformer, and further achieve the effect of effectively evaluating the insulation state of the transformer.
It will be apparent to those skilled in the art that the various modules or steps of the invention described above may be implemented using a general purpose computing device, they may be centralized on a single computing device or distributed across a network of computing devices, and they may be implemented using program code executable by the computing devices, such that they may be stored in a memory device and executed by the computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into various integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for determining the breakdown voltage of a transformer oilpaper insulation system is characterized by comprising the following steps:
placing a target insulating material included in a transformer oil paper insulating system between a first electrode and a second electrode included in an electrode device, wherein the electrode device includes the first electrode, the second electrode, and an oil tank, the first electrode and the second electrode are placed in the oil tank, and a first lead line of the first electrode is configured to be connected to a first end of a high voltage device located outside the oil tank, a second lead line of the second electrode is configured to be connected to a second end of the high voltage device, and the high voltage device supplies a voltage within a predetermined voltage range through the first end and the second end;
placing the electrode device with the target insulating material in a temperature control device, and adjusting the temperature in the electrode device by using the temperature control device;
connecting the first lead wire with the first end and the second lead wire with the second end under the condition that the temperature in the electrode equipment is determined to reach a target temperature value, and providing voltage between the first electrode and the second electrode by utilizing the high-voltage equipment;
increasing the voltage provided by the high voltage device until the target insulating material is broken down, determining the voltage for breaking down the target insulating material as the breakdown voltage of the target insulating material.
2. The method of claim 1, wherein connecting the first lead to the first terminal, connecting the second lead to the second terminal, and providing a voltage between the first electrode and the second electrode using the high voltage device upon determining that the temperature within the electrode device reaches a target temperature value comprises:
taking the electrode equipment out of the temperature control equipment under the condition that the temperature in the electrode equipment is determined to reach a target temperature value;
connecting the first lead line to the first end and the second lead line to the second end, and providing a voltage between the first electrode and the second electrode using the high voltage device.
3. The method of claim 1, wherein after placing the electrode apparatus with the target insulating material placed therein in a temperature-controlled apparatus, the method further comprises:
leading the first leading-out wire out of the temperature control equipment through a first through hole arranged in the temperature control equipment, and leading the second leading-out wire out of the temperature control equipment through a second through hole arranged in the temperature control equipment;
connecting the first outgoing line to the first end and the second outgoing line to the second end;
adjusting the temperature within the electrode apparatus with the temperature control apparatus;
providing a voltage between the first electrode and the second electrode with the high voltage device upon determining that the temperature within the electrode device reaches a target temperature value;
increasing the voltage provided by the high voltage device until the target insulating material is broken down, determining the voltage for breaking down the target insulating material as the breakdown voltage of the target insulating material.
4. The method of claim 1, wherein after placing the target insulation material included in the transformer oilpaper insulation system between a first electrode and a second electrode included in an electrode apparatus, the method further comprises:
wrapping a heating tape and a cooler on the electrode device, and connecting the first outgoing line with the first end and the second outgoing line with the second end;
adjusting a temperature within the electrode apparatus by the heating belt or the cooler;
providing a voltage between the first electrode and the second electrode with the high voltage device upon determining that the temperature within the electrode device reaches a target temperature value;
increasing the voltage provided by the high voltage device until the target insulating material is broken down, determining the voltage for breaking down the target insulating material as the breakdown voltage of the target insulating material.
5. The method of claim 1, wherein increasing the voltage provided by the high voltage device until the target insulating material is broken down, the determining the voltage to break down the target insulating material as the breakdown voltage of the target insulating material comprises:
increasing the voltage provided by the high voltage device at a predetermined rate, wherein the predetermined rate allows for adjustment, until the target insulating material is broken down, determining the voltage at which the target insulating material is broken down as the breakdown voltage of the target insulating material.
6. The method of any one of claims 1 to 5, wherein the target insulating material comprises: the oil-immersed paperboard is obtained by the following treatment:
performing target treatment on original transformer oil to obtain first transformer oil;
placing the first transformer oil in air for moisture absorption treatment to obtain second transformer oil;
placing an original insulating paperboard with a preset size in a vacuum drying box to dry the original insulating paperboard to obtain a first insulating paperboard;
heating the second transformer oil to a target temperature, and standing the first insulation paper board in the heated second transformer oil for a target time to obtain the oil-immersed paper board.
7. A system for determining the breakdown voltage of a transformer paper oil insulation system, comprising:
an electrode device, wherein the electrode device comprises a first electrode, a second electrode and an oil tank, a target insulating material included in a transformer oil paper insulating system is placed between the first electrode and the second electrode, the first electrode and the second electrode are placed in the oil tank, a first leading-out wire of the first electrode is configured to be connected with a first end of a high-voltage device located outside the oil tank, and a second leading-out wire of the second electrode is configured to be connected with a second end of the high-voltage device;
a temperature control device, wherein the temperature control device is configured to regulate a temperature within the electrode device;
the high voltage device, wherein the high voltage device provides a voltage within a predetermined voltage range through the first terminal and the second terminal;
a measuring device, wherein the measuring device is configured to measure a state of the target insulating material and determine a voltage to break down the target insulating material as a breakdown voltage of the target insulating material.
8. The system of claim 7, wherein the temperature control device comprises a first through hole and a second through hole, wherein,
the first through hole is configured to lead out the first lead-out wire to the outside of a temperature control device after the electrode device on which the target insulating material is placed in the temperature control device;
the second through hole is configured to lead out the second lead-out wire to the outside of the temperature control device after the electrode device on which the target insulating material is placed in the temperature control device.
9. A computer-readable storage medium, in which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method as claimed in any of claims 1 to 6 are implemented when the computer program is executed by the processor.
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