CN112363098A - Programmable cable partial discharge calibration simulation device and calibration method - Google Patents
Programmable cable partial discharge calibration simulation device and calibration method Download PDFInfo
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- 238000004891 communication Methods 0.000 claims abstract description 9
- 239000013307 optical fiber Substances 0.000 claims abstract description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052802 copper Inorganic materials 0.000 claims description 12
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Abstract
The invention discloses a programmable cable partial discharge calibration simulation device and a calibration method, wherein the device comprises a cable, a plurality of partial discharge pulse signal sources are connected to the cable, and the partial discharge pulse signal sources are connected with a PC (personal computer) through a first photoelectric conversion module, a communication optical fiber and a second photoelectric conversion module which are sequentially connected; the PC is used for controlling whether each partial discharge pulse signal source generates a partial discharge pulse signal or not and the magnitude of the partial discharge pulse signal. The PC is matched with the partial discharge pulse signal source to realize the program control adjustment of the size of the partial discharge pulse signal and the position of the partial discharge pulse signal connected into the cable, and when a high-voltage cable partial discharge measurement system is calibrated, the performance calibration of partial discharge position positioning and partial discharge measurement can be realized at one time, so that the efficiency is high, and the device has the advantages of multipoint partial discharge simulation, good repeatability and convenience in implementation.
Description
Technical Field
The invention relates to the technical field of electric power safety, in particular to a program-controllable cable partial discharge calibration simulation device and a calibration method.
Background
The partial discharge measuring system for high voltage cable is one new field nondestructive detection and evaluation system for high voltage cable defect and can detect the partial discharge signal size and position of high voltage cable quantitatively.
At present, the power industry standard DL/T1576-20166 kV-35 kV cable oscillatory wave partial discharge testing method is applied and implemented, high-voltage cable partial discharge measuring systems are increasingly applied, and after long-term use, partial discharge measurement and positioning performance of the measuring system needs to be verified urgently.
At present, the partial discharge position positioning and the partial discharge quantity measurement performance calibration of a measurement system are carried out separately, the measurement error calibration is carried out under the condition that no test voltage is applied, a standard calibrator is directly used for outputting a signal with a specific charge quantity, and the positioning precision calibration is mainly carried out by arranging a defect point on an actual cable.
The existing checking method and device can not complete positioning and partial discharge measurement performance checking at one time when partial discharge measurement performance checking is carried out. Meanwhile, based on the actual cable, the physical defects are set to carry out cable partial discharge simulation, the partial discharge amount is not controllable, an accumulative effect is achieved, and the partial discharge amount further deviates from an initial set value along with the development of a verification test.
Disclosure of Invention
The invention provides a program-controllable cable partial discharge calibration simulation device and a program-controllable cable partial discharge calibration method, which aim to solve the problem of low calibration efficiency of a high-voltage cable partial discharge measurement system in the prior art.
In a first aspect, a programmable cable partial discharge calibration simulation device is provided, which comprises a cable, wherein a plurality of partial discharge pulse signal sources are connected to the cable, and are connected with a PC (personal computer) through a first photoelectric conversion module, a communication optical fiber and a second photoelectric conversion module which are sequentially connected; the PC is used for controlling whether each partial discharge pulse signal source generates a partial discharge pulse signal or not and the magnitude of the partial discharge pulse signal.
The device realizes the size of the partial discharge pulse signal and the position program control adjustability of the cable access thereof by the cooperation of the PC and the partial discharge pulse signal source, realizes the performance verification of partial discharge position positioning and partial discharge measurement once when the device is used for calibrating a high-voltage cable partial discharge measurement system, has high efficiency, has the advantages of multipoint partial discharge simulation, good repeatability and convenient implementation
Furthermore, the cable includes two copper lines that are formed by a plurality of inductance series connection, two all parallelly connected a electric capacity before every symmetric position's inductance on the copper line.
The cable is used for simulating partial discharge based on the lumped parameter electronic components, the actual cable is simulated through the lumped parameter electronic components, the actual cable occupying a large amount of space is replaced by the small-size integrated module, and particularly, the advantage is more obvious when the partial discharge at a remote position is simulated. In addition, the cable for the partial discharge simulation can avoid the problems that the partial discharge quantity and other parameter performances have discrete type and poor repeatability and stability, the partial discharge defects have accumulative effect and signals are unstable and the like in the partial discharge simulation process based on the physical defects set by the actual cable.
Furthermore, the cable also comprises two insulating tubes, and the two copper wires are uniformly wound outside the two insulating tubes respectively. The two insulating pipes play a supporting role.
Further, the cable increases the length of the simulated actual cable by increasing the number of inductors connected in series and the number of capacitors connected in parallel on the two copper wires. The length of the actual cable can be controlled and simulated by setting the number of the inductors and the capacitors, the implementation is convenient, and the adjustment can be conveniently carried out at any time according to the requirement.
Further, the inductor is an air-core inductor.
Furthermore, a plurality of partial discharge pulse signal access ends are preset on the cable.
Furthermore, the multiple partial discharge pulse signal sources are multiple single-path partial discharge pulse signal sources or one multi-path partial discharge pulse signal source.
Furthermore, 2-4 partial discharge pulse signal sources are connected to the cable.
In a second aspect, a calibration method for a partial discharge measurement system of a high-voltage cable is provided, where calibration is performed by using the programmable cable partial discharge calibration simulation apparatus, and the calibration method includes the following steps:
connecting a high-voltage cable partial discharge measurement system to be calibrated to the initial end of the cable;
the PC sends out an instruction to control the multiple partial discharge pulse signal sources to generate partial discharge pulse signals required by calibration and transmit the partial discharge pulse signals to the cable;
a high-voltage cable partial discharge measurement system to be calibrated receives a partial discharge pulse signal and a reflection pulse signal transmitted to the initial end of a cable; measuring the magnitude of the partial discharge pulse signal and the position of the partial discharge pulse signal;
and comparing the magnitude and the position of the partial discharge pulse signal measured by the high-voltage cable partial discharge measurement system to be calibrated with the magnitude and the position of the partial discharge pulse signal source access cable, so as to realize the calibration of the high-voltage cable partial discharge measurement system to be calibrated.
Advantageous effects
The invention provides a programmable cable partial discharge calibration simulation device and a calibration method, wherein the size of a partial discharge pulse signal and the position programmable adjustment of an access cable can be realized by matching a PC (personal computer) with a partial discharge pulse signal source, and when a high-voltage cable partial discharge measurement system is calibrated, two types of performance calibration of partial discharge position positioning and partial discharge measurement are realized at one time, so that the efficiency is high, and the device has the advantages of multipoint partial discharge simulation, good repeatability and convenience in implementation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a programmable cable partial discharge calibration simulation apparatus according to an embodiment of the present invention;
fig. 2 is a schematic diagram of the structure of the cable in the embodiment provided in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
It is noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not intended to indicate or imply relative importance or order. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
Example 1
As shown in fig. 1, the present embodiment provides a programmable cable partial discharge calibration simulation apparatus, including a cable 1, where a plurality of partial discharge pulse signal sources 2 are connected to the cable 1, and the plurality of partial discharge pulse signal sources 2 are connected to a PC 6 through a first photoelectric conversion module 3, a communication optical fiber 4, and a second photoelectric conversion module 5 that are connected in sequence; the PC 6 is configured to control whether each partial discharge pulse signal source 2 generates a partial discharge pulse signal and the magnitude of the partial discharge pulse signal.
The PC 6 is matched with the partial discharge pulse signal source 2 to realize the size of a partial discharge pulse signal and the program-controlled adjustability of the position of the partial discharge pulse signal connected to a cable, and when the device is used for calibrating a high-voltage cable partial discharge measurement system, the partial discharge position positioning and partial discharge measurement performance calibration can be realized at one time, so that the efficiency is high, and the device has the advantages of multipoint partial discharge simulation, good repeatability and convenience in implementation. In addition, the communication optical fiber is made of an electrical insulation material, so that the safe electrical isolation between the PC and the cable 1 and between the PC and the plurality of partial discharge pulse signal sources 2 is completed, and the control signal transmission between the PC and the cable is realized; the PC can not be directly connected with the communication optical fiber and needs to be realized through the photoelectric conversion module, and the calibration simulation device can not be directly connected with the communication optical fiber and needs to be realized through the photoelectric conversion module.
As shown in fig. 2, in this embodiment, the cable 1 includes two copper wires 11 formed by serially connecting a plurality of inductors 12, and a capacitor 13 is connected in parallel in front of each inductor 12 at a symmetrical position on the two copper wires 11.
The cable 1 is used for simulating partial discharge based on the lumped parameter electronic components, an actual cable is simulated through the lumped parameter electronic components, a small-size integrated module replaces the actual cable occupying a large amount of space, and the advantage is more obvious particularly when the partial discharge at a remote position is simulated. In addition, the cable 1 of the structure can avoid the problems that the partial discharge quantity and other parameter performances have discrete type, repeatability and poor stability, the partial discharge defect has an accumulative effect, signals are unstable and the like in the partial discharge simulation process based on the physical defect set by an actual cable, and the cable 1 of the structure has the advantages of real simulation effect, accurate data, good repeatability, good simulation effect and convenience in implementation.
Preferably, the cable 1 further comprises two insulating tubes, and the two copper wires 11 are respectively and uniformly wound outside the two insulating tubes. The two insulating pipes play a supporting role.
The cable 1 increases the length of the simulated actual cable by increasing the number of inductors 12 connected in series and the number of capacitors 13 connected in parallel on two copper wires 11. The length of the actual cable can be controlled and simulated by setting the number of the inductors 12 and the number of the capacitors 13, the implementation is convenient, and the adjustment can be conveniently carried out at any time according to the requirement. Of course, the parameters of the inductor 12 and the capacitor 13 can be adjusted according to the requirement, so as to adjust the length of the simulated actual cable. In this embodiment, the inductor 12 is an air core inductor.
In this embodiment, a plurality of local discharge pulse signal access ends with known positions are preset on the cable 1.
In this embodiment, the multiple partial discharge pulse signal sources 2 are multiple single-path partial discharge pulse signal sources. Of course, in other embodiments, one multi-channel partial discharge pulse signal source may be used as an option.
Based on actual needs, 2-4 partial discharge pulse signal sources 2 are connected to the cable 1, and as shown in fig. 1, 3 partial discharge pulse signal sources 2 are connected to the cable 1 in this embodiment.
Example 2
The embodiment provides a calibration method for a high-voltage cable partial discharge measurement system, which is calibrated by using the programmable cable partial discharge calibration simulation device according to the embodiment, and comprises the following steps:
connecting a high-voltage cable partial discharge measurement system to be calibrated to the initial end of the cable;
the PC sends out an instruction to control the multiple partial discharge pulse signal sources to generate partial discharge pulse signals required by calibration and transmit the partial discharge pulse signals to the cable;
a high-voltage cable partial discharge measurement system to be calibrated receives a partial discharge pulse signal and a reflection pulse signal transmitted to the initial end of a cable; measuring the magnitude of the partial discharge pulse signal and the position of the partial discharge pulse signal;
and comparing the magnitude and the position of the partial discharge pulse signal measured by the high-voltage cable partial discharge measurement system to be calibrated with the magnitude and the position of the partial discharge pulse signal source access cable, so as to realize the calibration of the high-voltage cable partial discharge measurement system to be calibrated.
The working principle of the invention is illustrated by taking the embodiment provided in fig. 1 as an example:
the PC is provided with a notebook computer for calibration, the second photoelectric conversion module, the communication optical fiber, the first photoelectric conversion module and the three partial discharge pulse signal sources are sequentially connected, the three partial discharge pulse signal sources are respectively connected to three different positions of the cable, and a high-voltage cable partial discharge measurement system to be calibrated is connected to the initial end of the cable. The notebook computer controls the three partial discharge pulse signal sources to generate partial discharge pulse signals required by calibration through the second photoelectric conversion module, the communication optical fiber and the first photoelectric conversion module, the partial discharge pulse signals are transmitted to the initial end and the terminal end of the cable in the cable and can generate reflection pulse signals of the partial discharge pulse signals at the two ends of the cable, the partial discharge measurement system of the high-voltage cable to be calibrated receives the partial discharge pulse signals transmitted to the initial end of the cable and the reflection pulse signals thereof, the magnitude and the occurrence position of the partial discharge pulse signals are measured, and the measurement result is compared with the magnitude and the position of the partial discharge pulse signals of the partial discharge pulse signal sources connected into the cable, so that the calibration of the partial discharge measurement system of the high-voltage cable is realized.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A programmable cable partial discharge calibration simulation device is characterized by comprising a cable, wherein a plurality of partial discharge pulse signal sources are connected to the cable and are connected with a PC (personal computer) through a first photoelectric conversion module, a communication optical fiber and a second photoelectric conversion module which are sequentially connected; the PC is used for controlling whether each partial discharge pulse signal source generates a partial discharge pulse signal or not and the magnitude of the partial discharge pulse signal.
2. The programmable cable partial discharge calibration simulation device according to claim 1, wherein the cable comprises two copper wires formed by serially connecting a plurality of inductors, and a capacitor is connected in parallel in front of each inductor at a symmetrical position on the two copper wires.
3. The programmable cable partial discharge calibration simulation device of claim 2, wherein the cable further comprises two insulating tubes, and the two copper wires are uniformly wound around the two insulating tubes respectively.
4. The programmable cable partial discharge calibration simulation device according to claim 2 or 3, wherein the cable increases the length of the simulated actual cable by increasing the number of inductors connected in series and the number of capacitors connected in parallel on two copper wires.
5. The programmable cable partial discharge calibration simulation device according to claim 2 or 3, wherein the inductor is an air-core inductor.
6. The programmable cable partial discharge calibration simulation device according to any one of claims 1 to 3, wherein a plurality of partial discharge pulse signal access terminals are preset on the cable.
7. The programmable cable partial discharge calibration simulation device according to any one of claims 1 to 3, wherein the plurality of partial discharge pulse signal sources are a plurality of single-path partial discharge pulse signal sources or a plurality of multi-path partial discharge pulse signal sources.
8. The programmable cable partial discharge calibration simulation device according to any one of claims 1 to 3, wherein 2 to 4 partial discharge pulse signal sources are connected to the cable.
9. A calibration method for a partial discharge measurement system of a high-voltage cable, which is performed by using the programmable cable partial discharge calibration simulation device according to any one of claims 1 to 8, and comprises the following steps:
connecting a high-voltage cable partial discharge measurement system to be calibrated to the initial end of the cable;
the PC sends out an instruction to control the multiple partial discharge pulse signal sources to generate partial discharge pulse signals required by calibration and transmit the partial discharge pulse signals to the cable;
a high-voltage cable partial discharge measurement system to be calibrated receives a partial discharge pulse signal and a reflection pulse signal transmitted to the initial end of a cable; measuring the magnitude of the partial discharge pulse signal and the position of the partial discharge pulse signal;
and comparing the magnitude and the position of the partial discharge pulse signal measured by the high-voltage cable partial discharge measurement system to be calibrated with the magnitude and the position of the partial discharge pulse signal source access cable, so as to realize the calibration of the high-voltage cable partial discharge measurement system to be calibrated.
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Cited By (5)
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| CN113433430A (en) * | 2021-05-19 | 2021-09-24 | 深圳供电局有限公司 | Partial discharge detection apparatus and method |
| CN113687201A (en) * | 2021-08-31 | 2021-11-23 | 国网湖南省电力有限公司 | Cable insulation synchronization and pulse integration system and method |
| CN113990160A (en) * | 2021-12-30 | 2022-01-28 | 国网江西省电力有限公司电力科学研究院 | Modular cable simulation and fault simulation system and method |
| CN114002982A (en) * | 2021-10-29 | 2022-02-01 | 广东电网有限责任公司 | Multi-pulse oscillation wave generating device and method |
| CN117805567A (en) * | 2023-12-28 | 2024-04-02 | 北京雄新电力科技有限公司 | FPGA-based cable partial discharge simulation generation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20210212 |