CN108254662A - Shelf depreciation simulator - Google Patents

Shelf depreciation simulator Download PDF

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Publication number
CN108254662A
CN108254662A CN201810215109.5A CN201810215109A CN108254662A CN 108254662 A CN108254662 A CN 108254662A CN 201810215109 A CN201810215109 A CN 201810215109A CN 108254662 A CN108254662 A CN 108254662A
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CN
China
Prior art keywords
shelf depreciation
signal
plate electrode
power supply
voltage signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810215109.5A
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Chinese (zh)
Inventor
薛峰
魏东亮
王植
李通
阙伟平
刘珂
刘勤锋
何俊达
林伯琴
张雅洁
张熙
胡岳
黄洪逸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Jiaotong University
Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Original Assignee
Shanghai Jiaotong University
Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Jiaotong University, Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd filed Critical Shanghai Jiaotong University
Priority to CN201810215109.5A priority Critical patent/CN108254662A/en
Publication of CN108254662A publication Critical patent/CN108254662A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing 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

Abstract

The present invention provides a kind of shelf depreciation simulator, including:Power supply:Voltage signal needed for generating;Shelf depreciation physical model:The power supply is electrically connected to obtain the voltage signal, physical simulation partial discharge phenomenon;Local discharge signal output section:It receives the shelf depreciation physical model and the detectable signal generated during partial discharge phenomenon occurs.The present invention is small, easy to carry, multiple types shelf depreciation scene that can be under real simulation multiple power sources voltage form, and simple and practicable, and low to External Test Equipment condition depended degree, operability is strong.

Description

Shelf depreciation simulator
Technical field
The present invention relates to technical field of electric power, and in particular, to a kind of shelf depreciation simulator.
Background technology
Shelf depreciation is to cause the major reason of Electric Power Equipment Insulation failure, furthers investigate partial discharge phenomenon, probes into office Portion's discharge detection method, it is to ensure power equipment safety, reliable, stable operation to implement shelf depreciation live detection and on-line monitoring Important means.Because the practical shelf depreciation occurred has randomness and uncontrollability, shelf depreciation mould in power equipment Intending device becomes a kind of important tool of shelf depreciation research, particularly experimental study.
The simulation of shelf depreciation is tried in laboratory using all kinds of true type shelf depreciations of high-potting system cooperation at present The emulation that model carries out electric discharge collection of illustrative plates is tested, it is irremovable there are bulky, it can only be tried in specific environments such as high pressure halls It tests, the problems such as testing equipment builds difficulty, and the test period is long, and experiment power supply is the single form such as power frequency or DC voltage.
In addition one kind is then the form of similar static gun, can generate instantaneous high pressure pulse, but be unable to simulating realistic The shelf depreciation collection of illustrative plates synchronous with the high voltage power supply being applied on test product.
Also one kind is then the Digital Simulation shelf depreciation collection of illustrative plates sequence by way of programming, then to the arteries and veins of Digital Simulation Row enhanced processing is rushed in, often there are one on time-frequency characteristic with practical partial discharge pulse for the partial discharge pulse of this kind of emulation Fixed gap can not react true partial discharge pulse's characteristic, be typically used as the calibration of local discharge signal completely.
Invention content
For the defects in the prior art, the object of the present invention is to provide a kind of shelf depreciation simulators.
According to a kind of Portable PD On-Line simulator provided by the invention, including:
Power supply:Voltage signal needed for generating;
Shelf depreciation physical model:The power supply is electrically connected to obtain the voltage signal, physical simulation shelf depreciation Phenomenon;
Local discharge signal output section:Receive that the shelf depreciation physical model occurs to generate during partial discharge phenomenon can Detect signal.
Preferably, the power supply includes:
Waveform generator:Generate the voltage signal;
Power amplifier:The waveform generator is connected, receive the voltage-type and amplifies the power of the voltage signal;
High-tension transformer:The voltage signal by amplification is received, and promotes the signal amplitude of the voltage signal by amplification, And it exports to the shelf depreciation physical model.
Preferably, the voltage signal includes:Power frequency component, oscillation wave signal, square-wave signal or triangular signal.
Preferably, the shelf depreciation physical model includes creeping discharge model, bubble-discharge model and corona discharge Model.
Preferably, the shelf depreciation physical model further includes the protective resistance of series connection.
Preferably, the corona discharge model includes iron probe and copper rivet, the iron probe connects the power supply, institute State copper rivet ground connection, potential 0.
Preferably, the creeping discharge model includes iron screw, aluminium plate electrode and is arranged on the iron screw and institute State the acrylic board between aluminium plate electrode, power supply described in the iron screw connection, the aluminium plate electrode ground connection, potential 0.
Preferably, the bubble-discharge model includes small iron plate electrode, big iron plate electrode and is set to described small Poly (methyl methacrylate) plate between iron plate electrode and the big iron plate electrode, the poly (methyl methacrylate) plate centre position are stayed there are one filling out The circular aperture of air is filled, the small iron plate electrode connects the power supply, the big iron plate electrode ground connection, potential 0.
Preferably, the local discharge signal output section includes:Detect serial interfaces, the detection high-frequency pulse current of impedance Pincerlike or non-open-type current detecting cable port and electromagnetic wave signal, the test position of ultrasonic signal.
Compared with prior art, the present invention has following advantageous effect:
Shelf depreciation simulator provided by the invention is small, easy to carry, can real simulation multiple power sources voltage shape Multiple types shelf depreciation scene under formula, and simple and practicable, operability low to External Test Equipment condition depended degree By force.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention, Objects and advantages will become more apparent upon:
Fig. 1 is the structural diagram of the present invention;
Fig. 2 is the schematic diagram of power supply of the present invention;
Fig. 3 is the schematic diagram of corona discharge model;
Fig. 4 is the schematic diagram of creeping discharge model;
Fig. 5 is the schematic diagram of bubble-discharge model;
Fig. 6 is corona discharge wave sequence figure;
Fig. 7 is PRPD collection of illustrative plates;
Fig. 8 is PRPS collection of illustrative plates;
Fig. 9 is flame gray-scale map.
Specific embodiment
With reference to specific embodiment, the present invention is described in detail.Following embodiment will be helpful to the technology of this field Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this field For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention Protection domain.
As shown in Figure 1, a kind of Portable PD On-Line simulator provided by the invention, including:Power supply 1, shelf depreciation Physical model 2 and the part of local discharge signal output section 3 three.
Power supply 1 is applied to the required various forms of high voltage signals of shelf depreciation physical model for generating.
Shelf depreciation physical model 2 is electrically connected power supply 1 to obtain the voltage signal generated, and truly physical simulation is various The partial discharge phenomenon of type, shelf depreciation physical model 2 as test product, are connected to 1 both ends of power supply in the present invention, apply With high voltage.
What local discharge signal output section 3 received that local discharge physics model 2 occurs to generate during partial discharge phenomenon examines Signal is surveyed, output preserves to treat further to analyze and process.
As shown in Fig. 2, power supply 1 includes:Waveform generator 101, power amplifier 102 and high-tension transformer 103.
For generating the voltage signal being applied on shelf depreciation physical model 2, voltage signal can be compiled waveform generator 101 Journey is set, and signal magnitude is adjusted, and can be power frequency component, oscillation wave signal, square-wave signal, triangular signal etc., and waveform is sent out The voltage signal that raw device 101 exports is connected to power amplifier 102.
Power amplifier 102 is used to receive voltage signal caused by waveform amplification generator 101 and amplify its power, with When meeting voltage signal and being applied on shelf depreciation physical model 2, sufficiently large pulse current of PD, power can be generated Amplifier 102 does not adjust the voltage of voltage signal, mainly improves the carrying load ability of voltage signal, while its maximum output Power also functions to protective effect, and the voltage signal that power amplifier 102 exports is connected to high-tension transformer 103.
High-tension transformer 103 is used to receive the voltage signal of the output of power amplifier 102, and waveform generator 101 is sent out Raw voltage signal magnitude be increased to enough generate shelf depreciation high-voltage state, high-tension transformer 103 as power supply 1 most Output section afterwards, the voltage signal generated are connected to shelf depreciation physical model 2.
Shelf depreciation physical model 2 includes corona discharge model, creeping discharge model and bubble-discharge model,
Concrete type can carry out simulation setting according to the form of different power equipment shelf depreciations, set according to specific needs Count carry out simulation test customized, the model of simulation test is true model in scaled down version physically, to be reduced to office Portion discharge physics model generates the voltage applied required for shelf depreciation, so as to opposite voltage than it is relatively low in the case of truly The various types of partial discharge phenomenons of physical simulation;Shelf depreciation physical model 2 includes the protective resistance of series connection, is generated with limiting The safety of maximum current during shelf depreciation, protection power source 1 and user.
Local discharge signal output section 3, the serial interfaces including common detection impedance, the pincer for detecting high-frequency pulse current Or the test positions such as non-open-type current detecting cable port and electromagnetic wave signal, ultrasonic signal.
In the examples below, customized using FPA as signal amplifier and voluntarily 1:1000 former secondary coil turn ratios Transformer is illustrated as high-tension transformer.
Waveform generator:So that output voltage is positive and negative 5V in this example by adjusting resistance ratio, discharge waveform signal can Square wave, triangular wave and sine wave are selected, separately there is output signal frequency regulatory function, to realize that frequency, amplitude, waveform are all adjustable Signal output, herein frequency be 50H.
Power amplifier:FPA1000 is chosen as power amplifier, carries output overcurrent protection, internal temperature is protected extremely It protects, output power is 20W in this example.Its specific performance parameter is as follows:(1) input characteristics:Full power bandwidth 100KHz, input resistance Anti- 10k Ω (2) output characteristics:Maximum output current 2A, maximum output voltage 50V, peak power output 30W.
High-tension transformer:The generation of shelf depreciation needs higher voltage class, so with high-tension transformer by power Amplified waveform signal boosts, and 10V is boosted to 10kV, to meet the voltage requirements that shelf depreciation occurs.It considers The design volume lower weight of this equipment is lighter, therefore selects a single-phase two-winding transformer customized with meet demand.Its performance Parameter is as follows:(1) former secondary coil turn ratio:1/1000;(2) frequency characteristic:Working frequency 50Hz, working frequency section are low frequency Section;(3) moisture-proof mode:Epoxy sealing;(4) appearance and size:125mm*96mm*75m.
Space electric field distribution and electrode shape when type and generation partial discharge that shelf depreciation occurs is in close relations.Want Simulate required shelf depreciation type, it is necessary to build rational partial discharge model.Corona discharge is designed in this example, along face Electric discharge, the partial discharge model of bubble-discharge.
(1) corona discharge model
The geometry emulation of the corona discharge model of this example design such as Fig. 3, left end is iron probe 202, and right end is copper riveting Nail 203, surrounding fill air, the made insulation crust 201 of surrounding acrylic, and iron probe 202 connects frequency as 50Hz, amplitude 7kV Power supply 1, right end rivet ground connection, potential zero.
(2) creeping discharge model
With reference to figure 4, creeping discharge model left end is the iron screw 212 of a diameter of 3mm, and one piece of thickness of sandwich is 5mm Acrylic board 214;Right end is aluminium plate electrode 213, and surrounding is the insulation crust 211 of acrylic material.Iron screw 212 connects frequency The power supply 1 that rate is 50Hz, amplitude is 7.5KV, 213 ground potential of aluminium plate electrode is zero.Contact surface does fillet chamfered.
(3) bubble-discharge model
Such as design drawing 5, the bubble-discharge model left side is one small iron plate electrode 222, and the right is one big iron tablet electricity Pole 223;Centre is one piece of poly (methyl methacrylate) plate 224, and the centre position of poly (methyl methacrylate) plate 224 stays that there are one the diameters of filling air The circular aperture 225 of 2mm, surrounding are the insulation crust 221 of acrylic material.Small iron plate electrode 222 connects amplitude as 5kV, frequency The power supply 1 of rate 50Hz, big 223 ground potential of iron plate electrode on the right is zero.Chamfered is done to contact surface.
Power supply 1, shelf depreciation physical model 2 and the part of local discharge signal output section 3 three are integrated in In Pelican1500 safety boxs, model safety box external dimensions (the long * wide * high) 47*35.7*17.6cm, inside dimension (long * Wide * high) 42.5*28.4*15.5cm, case lid depth 4.6cm, cabinet depth 10.9cm.In safety box with three width be 2cm, Thickness is that the bending aluminum strip of 3mm builds a frame like structure, load-bearing and fixation as entire simulation shelf depreciation equipment platform Fulcrum, the epoxy resin board of the bottom 2mm thickness of aluminium frame is as dielectric substrate, after epoxy resin board is screwed in punching On aluminum strip, in this, as the fixed support body system of each section component.
The 50Hz alternating voltages that waveform generator adds up to 7kV outside corona discharge model are adjusted, are put down by simulating partial discharge Platform obtains 1000 discharge pulse data, and filtering process obtains corona discharge wave sequence shown in Fig. 6, and PRPD can be obtained by being further processed Collection of illustrative plates, PRPS collection of illustrative plates and flame gray-scale map are as shown in Figure 7 to 9.Corona discharge occurs over just negative the half of test voltage first At all peak values, and discharging time point is symmetrical on peak point both sides.Only when test voltage is excessively high, second group of tool is just had The electric discharge for having similar distribution characteristics is appeared near test voltage positive half cycle peak value.The corona discharge characteristic pattern for comparing this example can be with Find out, distribution characteristics is closed preferably with above-mentioned typical corona discharge character symbol.In corona discharge PRPD figures and flame gray-scale map, The generation moment of most point of discharges is at the both sides of 270 ° of phases, and distribution is more uniform, and amplitude is also not much different.This Illustrate, corona discharge model can accurately simulate the generation of corona discharge, and adjoint interference is less and discharge characteristic is bright It is aobvious.
In the description of the present application, it is to be understood that term " on ", " under ", "front", "rear", "left", "right", " perpendicular Directly ", the orientation of the instructions such as " level ", " top ", " bottom ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position Relationship is put, be for only for ease of description the application and simplifies description rather than instruction or implies that signified device or element are necessary With specific orientation, with specific azimuth configuration and operation, therefore it is not intended that limitation to the application.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited in above-mentioned Particular implementation, those skilled in the art can make a variety of changes or change within the scope of the claims, this not shadow Ring the substantive content of the present invention.In the absence of conflict, the feature in embodiments herein and embodiment can arbitrary phase Mutually combination.

Claims (9)

1. a kind of shelf depreciation simulator, which is characterized in that including:
Power supply:Voltage signal needed for generating;
Shelf depreciation physical model:The power supply is electrically connected to obtain the voltage signal, physical simulation partial discharge phenomenon;
Local discharge signal output section:Receive the shelf depreciation physical model occur to generate during partial discharge phenomenon it is detectable Signal.
2. shelf depreciation simulator according to claim 1, which is characterized in that the power supply includes:
Waveform generator:Generate the voltage signal;
Power amplifier:The waveform generator is connected, receive the voltage-type and amplifies the power of the voltage signal;
High-tension transformer:The voltage signal by amplification is received, and promotes the signal amplitude of the voltage signal by amplification, and defeated Go out to the shelf depreciation physical model.
3. shelf depreciation simulator according to claim 2, which is characterized in that the voltage signal includes:Power frequency is believed Number, oscillation wave signal, square-wave signal or triangular signal.
4. shelf depreciation simulator according to claim 1, which is characterized in that the shelf depreciation physical model includes Creeping discharge model, bubble-discharge model and corona discharge model.
5. shelf depreciation simulator according to claim 4, which is characterized in that the shelf depreciation physical model also wraps Include the protective resistance of series connection.
6. shelf depreciation simulator according to claim 4, which is characterized in that the corona discharge model is visited including iron Needle and copper rivet, the iron probe connect the power supply, the copper rivet ground connection, potential 0.
7. shelf depreciation simulator according to claim 4, which is characterized in that the creeping discharge model includes iron spiral shell Silk, aluminium plate electrode and the acrylic board being arranged between the iron screw and the aluminium plate electrode, the iron screw connect Connect the power supply, the aluminium plate electrode ground connection, potential 0.
8. shelf depreciation simulator according to claim 4, which is characterized in that the bubble-discharge model includes small iron It plate electrode, big iron plate electrode and is set to organic between the small iron plate electrode and the big iron plate electrode Glass plate, the poly (methyl methacrylate) plate centre position are stayed there are one the circular aperture of filling air, and the small iron plate electrode connects The power supply, the big iron plate electrode ground connection, potential 0.
9. shelf depreciation simulator according to claim 1, which is characterized in that the local discharge signal output section packet It includes:Detect impedance serial interfaces, detect high-frequency pulse current pincerlike or non-open-type current detecting cable port and The test position of electromagnetic wave signal, ultrasonic signal.
CN201810215109.5A 2018-03-15 2018-03-15 Shelf depreciation simulator Pending CN108254662A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108983054A (en) * 2018-08-06 2018-12-11 国网上海市电力公司 A kind of regulating transformer partial discharge simulator
CN110542842A (en) * 2019-09-29 2019-12-06 广东电网有限责任公司 10kV switch cabinet partial discharge simulation device and method
CN110675712A (en) * 2019-08-27 2020-01-10 西安电子科技大学 Power cable oscillatory wave partial discharge detection practical training system
CN111610414A (en) * 2020-05-19 2020-09-01 保定天威新域科技发展有限公司 Combined type discharging generation device for simulating multiple kinds of discharging in transformer
CN111722169A (en) * 2020-06-10 2020-09-29 深圳供电局有限公司 Anti-interference performance detection device and method of high-frequency partial discharge detector
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

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Publication number Priority date Publication date Assignee Title
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CN110675712A (en) * 2019-08-27 2020-01-10 西安电子科技大学 Power cable oscillatory wave partial discharge detection practical training system
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CN110542842A (en) * 2019-09-29 2019-12-06 广东电网有限责任公司 10kV switch cabinet partial discharge simulation device and method
CN111610414A (en) * 2020-05-19 2020-09-01 保定天威新域科技发展有限公司 Combined type discharging generation device for simulating multiple kinds of discharging in transformer
CN111722169A (en) * 2020-06-10 2020-09-29 深圳供电局有限公司 Anti-interference performance detection device and method of high-frequency partial discharge detector
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

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