CN106291122B - A kind of test method and system of oil immersed type condenser bushing watered and wetting defect - Google Patents
A kind of test method and system of oil immersed type condenser bushing watered and wetting defect Download PDFInfo
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- 230000007547 defect Effects 0.000 title claims abstract description 26
- 238000009736 wetting Methods 0.000 title claims abstract description 25
- 238000010998 test method Methods 0.000 title claims abstract description 22
- 238000005259 measurement Methods 0.000 claims abstract description 40
- 238000012360 testing method Methods 0.000 claims abstract description 31
- 238000001514 detection method Methods 0.000 claims description 21
- 239000003990 capacitor Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 230000002265 prevention Effects 0.000 abstract description 5
- 230000002542 deteriorative effect Effects 0.000 abstract description 3
- 230000004069 differentiation Effects 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000005030 aluminium foil Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2617—Measuring dielectric properties, e.g. constants
- G01R27/2623—Measuring-systems or electronic circuits
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
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- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
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Abstract
The invention discloses a kind of test methods of oil immersed type condenser bushing watered and wetting defect, based on true type bushing shell for transformer, under different moisture content and different temperatures, the parameters such as the dielectric loss of casing, capacitance, local discharge signal, absorptance are detected, to obtain measurement result.The measurement result can be used as the reference data for analyzing its changing rule.The test method provides help for the fault signature of follow-up study casing, differentiation and deteriorating course；Prevention and raising transformer safety operation for bushing shell for transformer watered and wetting defect have very important practical significance.In addition, invention additionally discloses a kind of test macros of oil immersed type condenser bushing watered and wetting defect.
Description
Technical field
The present invention relates to technical field of electric power, more particularly to a kind of survey of oil immersed type condenser bushing watered and wetting defect
Method for testing and system.
Background technique
Bushing shell for transformer (hereinafter referred to as casing) is the outgoing line device guided to the high-voltage line of inside transformer outside fuel tank,
It is the important accessory of transformer.110kV and the above bushing shell for transformer, usually oilpaper is capacitive.It by insulator, capacitor core,
The part such as center copper pipe, the oil conservater on head, the mounting flange at middle part and voltage equalizing ball of tail portion forms.Casing integrally uses head
Brute spring is pressed by center copper pipe string, and capacitor core therein is alternately rolled up at center by insulating paper and aluminium foil plus-pressure
It is molding on copper pipe.Aluminium foil is formed and center copper pipe concentric cylinder capacitance plate arranged side by side, and screen number can be 10-60 layers.Oilpaper electricity
Holding molded cannula is made of being rolled according to principle of capacitive divider, and for capacitor core as major insulation, outside is porcelain insulating, the inside injection
Transformer oil.
Main accessories of the casing as transformer, operating status whether well for transformer-supplied reliability to close weight
It wants.Statistical data shows that casing failure accounts for 20-30% of Accident of Transformer or so, failure ratio caused by middle sleeve humidified insulation
Example occupies first place, and moisture is an important factor for causing paper oil insulation to deteriorate, therefore passes through experimental study oil immersed type capacitor jacket
Water inlet tube dampness defect is of great significance.
Summary of the invention
The object of the present invention is to provide the test macros and method of a kind of oil immersed type condenser bushing watered and wetting defect.
In order to solve the above technical problems, the present invention provides a kind of test system of oil immersed type condenser bushing watered and wetting defect
System, including on-Line Monitor Device and instrument for measuring partial discharge, further includes: the pressure regulator connecting with AC power source is surveyed for adjusting
Examination working voltage used, the transformer being connect with the pressure regulator, the protection electricity being connect with the secondary windings of the transformer
Resistance, the first test product capacitor and the second test product capacitor being connect with the protective resistance, the with the first test product capacitance connection
One detection impedance, the instrument for measuring partial discharge connect with the first detection impedance for detecting the first detection impedance two
The local discharge signal at end detects impedance with the second of the second test product capacitance connection, the on-Line Monitor Device with it is described
Second detection impedance connection is for detecting the electric signal at the second detection impedance；
Wherein, the transformer includes casing to be measured, the other end of the first detection impedance and the second detection resistance
Anti- other end ground connection.
A kind of test method of oil immersed type condenser bushing watered and wetting defect, for test macro described above, packet
It includes:
S10: in the initial state, measurement obtain in normal temperature environment micro-water content in the oil of each casing to be measured, ontology dielectric loss,
Capacitance, insulating resistance value and absorptance；
S11: in temperature-rise period, the casing to be measured 10kV dielectric loss corresponding under each temperature value and electricity are successively measured
Capacity obtains the casing to be measured 10kV corresponding under each temperature value by on-Line Monitor Device and is situated between in temperature-fall period
Damage, capacitance, high voltage dielectric loss and Leakage Current value；
S12: after the water of the casing injection predetermined amount to be measured, in temperature-rise period, the casing to be measured is measured each
Corresponding 10kV dielectric loss and capacitance under temperature value measure casing to be measured institute under each temperature value in temperature-fall period
Corresponding 10kV dielectric loss, capacitor, high voltage dielectric loss and Leakage Current；
S13: in normal temperature environment, the 10kV dielectric loss and electricity of each casing to be measured are obtained by the on-Line Monitor Device
Capacity, while the local discharge signal of the casing to be measured is obtained by instrument for measuring partial discharge；
S14: when reaching the predetermined time, judge current measurement and the 10kV dielectric loss in step S13, capacitance drawn game
Whether portion's discharge signal changes, if so, return step S12, otherwise controls pressure regulator and continue pressure regulation, while periodically
The dielectric loss and capacitance of the casing to be measured are measured, until the casing to be measured leakage of oil, crackle occurs or is more than in step S13
Until 5% or more capacitance.
Preferably, the quantity of the casing to be measured is 3.
Preferably, in the step S11, the starting point of the temperature-rise period is room temperature, and maximum temperature values are 90 DEG C.
Preferably, in the step S11, the starting point of the temperature-fall period is 90 DEG C, and terminal is room temperature.
Preferably, the step S11, in the temperature-rise period, each increasing extent of temperature is 10 DEG C, and keeps the temperature 3 hours.
Preferably, in the step S12 for the first time to the water of the casing to be measured injection predetermined amount be respectively 10ml, 20ml,
30ml, subsequent is 30ml.
Preferably, the step S12 is before temperature-rise period further include: the casing to be measured is being placed in the feelings in drying chamber
Under condition, micro-water content and 10kV dielectric loss in the oil of the casing to be measured are periodically measured, until measurement result does not change and is
Only.
Preferably, the step S12, in the temperature-rise period, each increasing extent of temperature is 10 DEG C, and keeps the temperature 3 hours.
Preferably, in the step S14, the predetermined time was 3 weeks.
The test method and system of oil immersed type condenser bushing watered and wetting defect provided by the present invention are become based on true type
Depressor casing joins the dielectric loss of casing, capacitance, local discharge signal, absorptance etc. under different moisture content and different temperatures
Number is detected, to obtain measurement result.The measurement result can be used as the reference data for analyzing its changing rule.The test side
Method provides help for the fault signature of follow-up study casing, differentiation and deteriorating course；For bushing shell for transformer watered and wetting
The prevention and raising transformer safety operation of defect have very important practical significance.
Detailed description of the invention
In order to illustrate the embodiments of the present invention more clearly, attached drawing needed in the embodiment will be done simply below
It introduces, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ordinary skill people
For member, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structure chart of the test macro of oil immersed type condenser bushing watered and wetting defect provided by the invention；
Fig. 2 is a kind of flow chart of the test method of oil immersed type condenser bushing watered and wetting defect provided by the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, those of ordinary skill in the art are without making creative work, obtained every other
Embodiment belongs to the scope of the present invention.
Core of the invention is to provide the test method and system of a kind of oil immersed type condenser bushing watered and wetting defect.
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Fig. 1 is a kind of structure chart of the test macro of oil immersed type condenser bushing watered and wetting defect provided by the invention.
As shown in Figure 1, the test macro (hereinafter referred to as system) of oil immersed type condenser bushing watered and wetting defect, including on-line monitoring dress
Set 10 and instrument for measuring partial discharge 11, further includes: the pressure regulator T1 being connect with AC power source AC, for adjusting test fortune used
Row voltage, the transformer T2 being connect with pressure regulator T1, the protective resistance Zf being connect with the secondary windings of transformer T2, with protection electricity
The the first test product capacitor Ck and the second test product capacitor Cx for hindering Zf connection, the first detection impedance being connect with the first test product capacitor Ck
Z1, instrument for measuring partial discharge 11 believe with the shelf depreciation that the first detection impedance Z 1 is connect for detecting the first detection 1 both ends of impedance Z
Number, the second detection impedance Z 2 connecting with the second test product capacitor Cx, on-Line Monitor Device 10 connect use with the second detection impedance Z 2
The electric signal at impedance Z 2 is detected in detection second；
Wherein, transformer T2 includes casing to be measured, and the other end and second of the first detection impedance Z 1 detects the another of impedance Z 2
One end ground connection.
In specific implementation, the parameter of transformer T2 can select according to the actual situation, such as can be concrete application ring
Actual parameter used in border.Pressure regulator T1 for the voltage of power supply AC to be adjusted, such as by voltage have it is small reach adjusting,
Or descending adjusting, whole voltage values within the scope of voltage max can be obtained.It include casing to be measured in transformer,
Casing to be measured can obtain corresponding measurement result under normal circumstances, by instrument for measuring partial discharge and on-Line Monitor Device,
But in the abnormal situation of casing to be measured, also phase can be obtained by instrument for measuring partial discharge and on-Line Monitor Device
The measurement result answered, only the measurement result with it is normal when obtained measurement result be different.In normal condition and not just
The measurement result obtained in normal situation can reflect which kind of measurement result corresponds to which kind of state casing to be measured is in, so as to
Whether the casing for estimating the transformer in use breaks down.
In the present invention, corresponding each measurement result after casing dampness to be measured is mainly obtained, these measurement results are passed through
Changing rule is analyzed, provides reliable data for prevention transformer fault.
Test device provided in this embodiment provides necessary hardware testing basis for test method, can obtain to be measured
Corresponding measurement result when casing works online, to the characteristic parameter for extracting characterization failure evolution process in follow-up work, analysis
Its changing rule and prevention and raising transformer safety operation have very important practical significance.
Fig. 2 is a kind of flow chart of the test method of oil immersed type condenser bushing watered and wetting defect provided by the invention.
As shown in Figure 2, comprising:
S10: in the initial state, measurement obtain in normal temperature environment micro-water content in the oil of each casing to be measured, ontology dielectric loss,
Capacitance, insulating resistance value and absorptance.
In the present invention, original state refers to the case where each casing to be measured does not make moist, and room temperature refers to 25 DEG C.?
In this step, the initial parameter of each casing to be measured is obtained by corresponding test equipment in normal temperature environment, for example, in oil it is micro-
Water content, ontology dielectric loss, capacitance, insulating resistance value and absorptance.Since the instrument that measurement above-mentioned parameter is used is existing
There is technology, therefore, this embodiment is not repeated.It should be noted that this step does not need oil immersed type in the above-described embodiments
It is carried out in the test macro of condenser bushing watered and wetting defect.
As a preferred embodiment, the quantity of casing to be measured is 3.Be understood that but, casing to be measured
Quantity can arbitrarily be chosen, but if quantity is very few, such as if one, measurement result do not have it is comparative, if quantity mistake
More, then test process is relatively complicated.
S11: in temperature-rise period, casing to be measured 10kV dielectric loss corresponding under each temperature value and capacitor are successively measured
Amount obtains casing to be measured 10kV dielectric loss corresponding under each temperature value, capacitor by on-Line Monitor Device in temperature-fall period
Amount, high voltage dielectric loss and Leakage Current value.
This step carries out heating measurement and temperature measurement to the casing to be measured in step S10.In temperature-rise period, successively
Obtain 10kV dielectric loss and capacitance of each casing to be measured under different temperatures value.Here the meaning successively, can be to it is each to
Survey casing heats up one by one obtains a series of measurements, can also obtain whole casings to be measured at this under the same temperature value
Corresponding measurement result when temperature value.The preferably corresponding embodiment of the latter.
As a preferred embodiment, the starting point of temperature-rise period is room temperature, i.e., 25 DEG C, maximum temperature values are 90 DEG C,
That is 90 DEG C of terminal.The implementation being understood that, maximum temperature values may be set according to actual conditions, for example, in order to which process is more simple
Single, it is 50C that maximum temperature values, which can also be arranged,.
As a preferred embodiment, the starting point of temperature-fall period is 90 DEG C, terminal is room temperature.The reality being understood that
It applies, the maximum temperature values of temperature-fall period are exactly the maximum temperature values of temperature-rise period.
As a preferred embodiment, increasing extent of temperature is 10 DEG C every time, and keep the temperature 3 hours.
In the above-described embodiments, the initial range of temperature value is merely defined, there is no the amplitudes for the cooling for limiting heating.It can
With understanding, may be set according to actual conditions using more heatings of amplitude on a large scale or cooling, but it is more preferable in order to reach
Measurement result, preferably increasing extent of temperature is 10 DEG C in the present embodiment, and the heating just progress that finishes and then keep the temperature 3 hours every time
Corresponding measurement.The purpose done so is that it is possible to so that the temperature of casing to be measured is more nearly the temperature value of setting.
S12: after the water of casing to be measured injection predetermined amount, in temperature-rise period, casing to be measured is measured under each temperature value
Corresponding 10kV dielectric loss and capacitance measure casing to be measured 10kV corresponding under each temperature value and are situated between in temperature-fall period
Damage, capacitor, high voltage dielectric loss and Leakage Current.
It is the measurement carried out in the case that casing to be measured does not make moist in step S10 and step S11, and in this step
In, it to be measured in the case where casing to be measured makes moist.First to the water of each casing injection predetermined amount to be measured, then risen
The measurement of mild temperature-fall period.Since the method for the parameters of this step acquisition is skill well-known to those skilled in the art
Art, this embodiment is not repeated.
Since casing to be measured has made moist, obtained measurement result is different from the measurement result that step S11 is obtained.It is logical
Crossing can obtain temperature value is corresponding with each measurement result under different temperatures, the change procedure of parameters.
As a preferred embodiment, for the first time to casing to be measured injection predetermined amount water be respectively 10ml, 20ml,
30ml.It is understood that the embodiment is the embodiment for 3 casings to be measured, if it is 5 casings to be measured, then
It can be 10ml, 15ml, 20ml, 35ml, 30ml.It may be set according to actual conditions as to casing to be measured injection how much water,
It is not a kind of mode of only above-mentioned magnitude.
As a preferred embodiment, step S12 is before temperature-rise period further include: casing to be measured is being placed in baking
In the case where in room, micro-water content and 10kV dielectric loss in the oil of casing to be measured are periodically measured, until measurement result does not become
It turns to only.
Why plus the step for, be that the casing to be measured of dampness can be allowed more uniform, and be more in line with actual motion
Situation, such as at a time, the casing of the transformer in use makes moist, but over time, the casing of dampness
Can slowly it dry out.By the step for we it may determine that go out dampness to dry out during, if the influence to transformer
It is larger, whether being capable of normal use after exsiccation.
As a preferred embodiment, each increasing extent of temperature is 10 DEG C, and keeps the temperature 3 hours in temperature-rise period.
S13: in normal temperature environment, the 10kV dielectric loss and capacitance of each casing to be measured are obtained by on-Line Monitor Device, together
When the local discharge signal of casing to be measured obtained by instrument for measuring partial discharge.
After each casing dampness to be measured, the process for heating up and cooling down has been carried out respectively, the casing to be measured to make moist at this time is
Tend to be steady state, is installed in transformer, runs device shown in FIG. 1, obtains 10kV dielectric loss and capacitance and office
Portion's discharge signal.
It should be noted that needing the oil immersed type described in above-described embodiment capacitive in this step, in temperature-fall period
It is carried out in the test macro of casing watered and wetting defect.
S14: when reaching the predetermined time, judge current measurement and the 10kV dielectric loss in step S13, capacitance drawn game
Whether portion's discharge signal changes, if so, return step S12, otherwise enters step S15；
S15: control pressure regulator continues pressure regulation, while periodically measuring the dielectric loss and capacitance of casing to be measured, until to
Casing is surveyed leakage of oil, crackle occur or be more than in step S13 until 5% or more capacitance.
Predetermined time in the present invention may be set according to actual conditions, such as on the basis of the above embodiments, as
A kind of preferred embodiment, predetermined time were 3 weeks.When reaching the predetermined time, such as at 3 weeks, measure again it is each to
Casing 10kV dielectric loss and capacitance and local discharge signal are surveyed, if this measurement result does not have with the measurement result in step S13
It changes, then continues to control pressure regulator adjustment output voltage, and periodically measure above-mentioned parameter, until casing to be measured goes out
Existing leakage of oil, crackle are more than in step S13 until 5% or more capacitance；If there is a change, then illustrate casing dampness to be measured
It is not that very seriously, it can further be allowed to make moist, i.e. return step S12 continues to execute S12-S14.If it is second or the
Three it is inferior to casing to be measured fill the water, then injection rate be 30ml.
In the above-described embodiments, casing to be measured can be obtained under various varying environments by each step, such as different
Temperature, the measurement result of different wetness can be obtained by the performance of casing to be measured by analyzing these measurement results.Using inverse
To analysis, after the performance of measuring transformer, so that it may anti-to release, whether the casing of the transformer there is the problem of dampness, with
And whether dampness is serious.
The test method of oil immersed type condenser bushing watered and wetting defect provided in this embodiment is based on true type transformer set
Pipe carries out the parameters such as the dielectric loss of casing, capacitance, local discharge signal, absorptance under different moisture content and different temperatures
Detection, to obtain measurement result.The measurement result can be used as the reference data for analyzing its changing rule.The test method for
Fault signature, differentiation and the deteriorating course of follow-up study casing provide help；For bushing shell for transformer watered and wetting defect
Prevention and raising transformer safety operation have very important practical significance.
The test method to oil immersed type condenser bushing watered and wetting defect provided by the present invention and system carry out above
It is discussed in detail.Each embodiment is described in a progressive manner in specification, the highlights of each of the examples are with its
The difference of his embodiment, the same or similar parts in each embodiment may refer to each other.For being filled disclosed in embodiment
For setting, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is referring to method part
Explanation.It should be pointed out that for those skilled in the art, in the premise for not departing from the principle of the invention
Under, it can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the protection of the claims in the present invention
In range.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
Claims (9)
1. a kind of test method of oil immersed type condenser bushing watered and wetting defect is used for oil immersed type condenser bushing watered and wetting
The test macro of defect, the test macro of the oil immersed type condenser bushing watered and wetting defect, including on-Line Monitor Device and
Instrument for measuring partial discharge, further includes: the pressure regulator being connect with AC power source, for adjusting test working voltage used, with institute
The transformer of pressure regulator connection is stated, the protective resistance connecting with the secondary windings of the transformer is connect with the protective resistance
The first test product capacitor and the second test product capacitor, detect impedance with the first of the first test product capacitance connection, the part is put
Electric tester connect the local discharge signal for detecting first detection impedance both ends with the first detection impedance, with institute
The second detection impedance of the second test product capacitance connection is stated, the on-Line Monitor Device is connect with the second detection impedance for examining
Survey the electric signal at the second detection impedance；
Wherein, the transformer includes casing to be measured, and the other end and described second of the first detection impedance detects impedance
Other end ground connection；
It is characterized in that, this method comprises:
S10: in the initial state, measurement obtains in normal temperature environment micro-water content, ontology dielectric loss, capacitor in the oil of each casing to be measured
Amount, insulating resistance value and absorptance；
S11: in temperature-rise period, the casing to be measured 10kV dielectric loss corresponding under each temperature value and capacitor are successively measured
Amount, in temperature-fall period, by on-Line Monitor Device obtain the casing to be measured 10kV dielectric loss corresponding under each temperature value,
Capacitance, high voltage dielectric loss and Leakage Current value；
S12: after the water of the casing injection predetermined amount to be measured, in temperature-rise period, the casing to be measured is measured in each temperature
It is corresponding under each temperature value to measure the casing to be measured in temperature-fall period for value lower corresponding 10kV dielectric loss and capacitance
10kV dielectric loss, capacitance, high voltage dielectric loss and Leakage Current；
S13: in normal temperature environment, the 10kV dielectric loss and capacitor of each casing to be measured are obtained by the on-Line Monitor Device
Amount, while the local discharge signal of the casing to be measured is obtained by instrument for measuring partial discharge；
S14: when reaching the predetermined time, judge that current measurement is put with 10kV dielectric loss, capacitance and the part in step S13
Whether electric signal changes, if so, return step S12, otherwise controls pressure regulator and continue pressure regulation, while periodically measuring
The 10kV dielectric loss and capacitance of the casing to be measured, until the casing to be measured leakage of oil, crackle occurs or is more than in step S13
Until 5% or more capacitance.
2. test method according to claim 1, which is characterized in that the quantity of the casing to be measured is 3.
3. test method according to claim 2, which is characterized in that in the step S11, the starting point of the temperature-rise period
For room temperature, maximum temperature values are 90 DEG C.
4. test method according to claim 3, which is characterized in that in the step S11, the starting point of the temperature-fall period
It is 90 DEG C, terminal is room temperature.
5. test method according to claim 4, which is characterized in that the step S11, in the temperature-rise period, often
Secondary increasing extent of temperature is 10 DEG C, and keeps the temperature 3 hours.
6. test method according to claim 5, which is characterized in that for the first time to the casing to be measured in the step S12
The water for injecting predetermined amount is respectively 10ml, 20ml, 30ml, and subsequent is 30ml.
7. test method according to claim 6, which is characterized in that the step S12 is before temperature-rise period further include:
In the case where the casing to be measured is placed in drying chamber, periodically measure in the oil of the casing to be measured micro-water content and
10kV dielectric loss, until measurement result does not change.
8. test method according to claim 7, which is characterized in that the step S12, in the temperature-rise period, often
Secondary increasing extent of temperature is 10 DEG C, and keeps the temperature 3 hours.
9. according to test method described in claim 2 to 8 any one, which is characterized in that described pre- in the step S14
It fixes time as 3 week.
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| CN112051311A (en) * | 2020-08-26 | 2020-12-08 | 国网福建省电力有限公司莆田供电公司 | Power transformer bushing damp defect simulation method and device |
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