CN109507548A - 10kV route on-pole switch charges partial discharge test method - Google Patents
10kV route on-pole switch charges partial discharge test method Download PDFInfo
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- CN109507548A CN109507548A CN201811324360.1A CN201811324360A CN109507548A CN 109507548 A CN109507548 A CN 109507548A CN 201811324360 A CN201811324360 A CN 201811324360A CN 109507548 A CN109507548 A CN 109507548A
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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
Abstract
The invention discloses a kind of 10kV route on-pole switch to charge partial discharge test method, includes the following steps: S1, tests environment amplitude using partial discharge test equipment；S2 carries out transient state voltage-to-ground to 10kV on-pole switch using partial discharge test equipment and detects；S3 carries out ultrasound examination to 10kV on-pole switch using partial discharge test equipment；Carry out when S4, discovery are to transient state voltage-to-ground or excessively high ultrasonic wave and is accurately positioned；S5 analyzes test data, determines equipment state.The present invention solves the problems, such as that 10kV on-pole switch can not carry out live detection, it is determined that the state in switch charging operation.
Description
Technical field
The present invention relates to the local discharge measuring method of the livewire work in middle pressure field, especially a kind of middle compression leg upper switch
Charge local discharge measuring method.
Background technique
10kV on-pole switch equipment significance level is higher, and 10kV on-pole switch is segmented generally as main line, contact or big
The incoming switch of load user, failure or the influence more normal power supply for possibly even influencing whole route of user that has a power failure.Hair
The reliable power supply that user is influenced when raw failure, to user's production and the power supply of power supply enterprise at greater loss.
10kV on-pole switch installation site and device are special: 1), liftoff height, make an inspection tour, maintenance it is difficult: 10kV on-pole switch peace
Loaded on outdoor aerial route cement pole, installation site is higher, general liftoff in 9m or more, State Grid Corporation of China's " distribution fortune
Professional etiquette journey " Q/GDW519-2010 require overhead transmission line column on electrical equipment the densely populated areas such as urban district installation site must not
Lower than 9m.Personnel can not clearly check the state of on-pole switch equipment with naked eyes on the ground when tour, make an inspection tour relatively difficult.Together
When due to installation site it is higher, it is closer from electrical body, when maintenance route and equipment must have a power failure, personnel must upper boom operation, it is difficult
It spends larger.2), 10kV on-pole switch equipment is small, and operating mechanism gap is small inside equipment, and only 10cm~20cm is unsatisfactory for 10kV
Electrical safety required distance, it is necessary to effectively be insulated using the vacuum or SF6 gas of sealing.And due to 10kV on-pole switch
It is generally loaded on field, site environment is complicated, it is necessary to be sealed to equipment, cause only can not effectively judge equipment shape with naked eyes
State.10kV on-pole switch must have side to charge always generally as overhead transmission line breaking operation, and equipment is caused to be in electrification always
State, personnel must not directly touch equipment.
The existing detection of 10kV on-pole switch, judgment method are single: only interruption maintenance can not carry out live detection.It is existing
For 10kV on-pole switch since installation site is higher, is constantly in electriferous state, existing detection means is more single, existing no electrification
Detection means only uses interruption maintenance.Simultaneously because being located at field, installation site height, part place is without needed for detecting instrument
220V power supply causes detection difficulty larger.
It does traditional power failure detection to be limited by place: if scene is without 220V power supply, then needing to carry out dismounting replacement；As scene has
Power supply, then the necessary upper boom operation of tester, work difficulty are big.
Do traditional power failure and detect on trial batch of conditionality: necessary pre- first to file has a power failure, and carries out examination & approval, could replace and open
It closes.Existing electricity consumption reliability requirement is high, and the examination & approval that have a power failure are difficult, and the method exists uncertain.
Summary of the invention
Present invention is generally directed under existing maintenance model, the repair time is long, interruption maintenance is needed to cause power off time long,
The disadvantage of maintenance process complexity provides a kind of 10kV route on-pole switch electrification partial discharge test method.
In order to solve the above technical problems, the present invention adopts the following technical scheme: 10kV route on-pole switch electrification partial discharge is surveyed
Method for testing includes the following steps:；
S1 tests environment amplitude using partial discharge test equipment；
S2 carries out transient state voltage-to-ground to 10kV on-pole switch using partial discharge test equipment and detects；
S3 carries out ultrasound examination to 10kV on-pole switch using partial discharge test equipment；
Carry out when S4, discovery are to transient state voltage-to-ground or excessively high ultrasonic wave and is accurately positioned；
S5 analyzes test data, determines equipment state.
Preferably, the accurate positioning method of step S4 are as follows: the located lateral of first switchgear, when two detectors trigger simultaneously
When, illustrating discharge position on the middle line of two detectors, the then longitudinal register of switchgear equally determines a middle line, two
The intersection point of root middle line is exactly the specific location of shelf depreciation.
Preferably, when two detector triggerings are unstable, when can not judge, any one mobile detector, positioning
It is which detector is first triggered that system, which separates,.
Preferably, when there is many places point of discharge, the channel instruction of two detectors in some particular detection region is found
Lamp is all bright, and detector once gone out this region can significantly extraction of signal it is successive, it is exactly to discharge that this specific region is logical
The distribution of point.
Preferably, the analysis method of step S5 includes horizontal analysis: switchgear in the same switch gear room is assumed in the analysis
Apparent difference is not present in apparatus insulated level, by analyzing the average level of homogeneous measurement result, and measures individual and deviates always
The degree of body average level judges the equipment with the presence or absence of insulation defect.
Preferably, the analysis method of step S5 includes trend analysis: the analysis assumes that the dielectric level of equipment will not occur
Sudden deterioration, successional partial discharge test data are not in big difference, i.e., variable quantity keeps stablizing, and surrounds zero point wave
It is dynamic, the test result of same switchgear different time is analyzed, so that comparative analysis obtains the operation conditions of switchgear.
Preferably, the analysis method of step S5 includes statistical analysis: to each substation's different voltages level switch cabinet one
The overall operation situation fixed time in section is for statistical analysis, calculates its typical statistic parameters, and combine and assume certain probability
Distributed model calculates discharge level corresponding with probability of malfunction value.
Preferably, the analysis method of step S5 includes threshold value comparison: calculating the discharge level obtained judgement to statistically analyze
The likelihood of failure of equipment provides three threshold values Q1, Q2, Q3, which is obtained by above-mentioned statistical analysis, by the inspection of certain switchgear
It surveys result Ve and these three threshold values is compared, obtain the operating status of the current switchgear, operating status includes: normal, pass
Note, early warning and maintenance,
Preferably, tester and partial discharge test equipment are sent to close to the position on-pole switch 1m using Live working Aerial Device.
The present invention solves the problems, such as that 10kV on-pole switch can not carry out live detection, it is determined that in switch charging operation
State.It has the following beneficial effects:
1, operation has the characteristics that convenience, feasibility.Flexibly, flexibly personnel can be sent to open country using Live working Aerial Device
Equipment on column on outer cement pole utilizes electrification partial discharge test philosophy and effective knot of 10kV on-pole switch construction and operation characteristic
It closes, feasibility is high, and data are directly read, and analyzes result simple, intuitive.
2, monitoring time is short.10kV on-pole switch charges partial discharge maintenance in experimental tests, when one switch of general test
Between be 20 minutes or so.
Detailed description of the invention
Present invention will be further described below with reference to the accompanying drawings and specific embodiments:
Fig. 1 is the structural schematic diagram of piezoelectric type detector of sound；
Fig. 2 is inside switch cabinet discharge examination positioning schematic.
Specific embodiment
10kV route on-pole switch electrification partial discharge test method of the present invention is specifically described below, includes the following steps:；
S1 tests environment amplitude using partial discharge test equipment；
S2 carries out transient state voltage-to-ground to 10kV on-pole switch using partial discharge test equipment and detects；
S3 carries out ultrasound examination to 10kV on-pole switch using partial discharge test equipment；
Carry out when S4, discovery are to transient state voltage-to-ground or excessively high ultrasonic wave and is accurately positioned；
S5 analyzes test data, determines equipment state.
Before testing, Live working Aerial Device is unfolded near 10kV on-pole switch installation point cement pole, tester's wearing is exhausted
Edge clothes, insulating glove carry instrument and enter insulation bucket arm, carry out detection and prepare.Specifically utilize Live working Aerial Device by tester
Member send to on-pole switch side 1m left-right position.
Switchgear interior insulation defect will lead to the generation of partial discharge phenomenon, switchgear generate shelf depreciation can occur sound,
The physical and chemical changes such as light, electricity, heat.These features all can be used as the sensing objects of Partial Discharge Detection signal.
Surface-discharge, which generates sound wave, has scattering in each frequency range.Audible acoustic detection depends on personal hearing.
It is advantageous using ultrasonic wave part in instrument detection sound spectrum.Instrument is more ear-sensitive than people, independent of operator, detection
Most efficient method is using a ultrasonic sensor, and main frequency is about in 40kHz.This method is carrying out surface-discharge
Detection when be very successfully.
When internal discharge and corona discharge occur for switchgear insulating part, electromagnetic wave will be generated, these electromagnetic waves pass through
Channel between switchgear metal shell blazes abroad, these channels may be interval, liner or the other insulation between metal shell
Component when electromagnetic wave spreads out of metal cabinet, while generating a transient state voltage-to-ground on the metal cabinet of switchgear
(TEV), transient state voltage-to-ground (TEV) only has several volts and can only maintain several nanoseconds (ns).It can be set by switch in operation
The internal discharge and corona discharge situation for placing a TEV detector in the outer box shell of standby metal to test in switchgear.
The most successful detection method of surface-discharge is using ultrasonic technology, and the TEV signal that surface-discharge issues is than interior
It discharges much smaller in portion.In addition, electromagnetic wave signal frequency caused by surface-discharge is also than the detection frequency of TEV equipment
It is low, this is because caused by the different reason of flash-over characteristic, in many cases, it will not detected by TEV sensor, because
It is lower than background value for this electromagnetic signal.
1, TEV testing principle: inside switchgear solid insulating material, due to some small gaps of extraneous factor insulating part.
In use, insulator one end is grounded, a terminated high voltage, so that these small gaps are equally charged as small capacitances, when being charged to
When to a certain degree, they just discharge, while generating various physics, chemical phenomenon, such as the exchange of charge, emit electromagnetic wave, fever,
Decomposition product carbon etc. is generated, increasing carbon will lead to gap conducting, and the electric pressure by increasing action in adjacent gap repeats
The above process finally results in insulation breakdown.It is passed by the metal product that the electromagnetic impulse that electric discharge generates largely passes through surrounding
Output is gone, while generating a transient voltage, these voltage pulses are transient state voltage-to-ground (TEV).Studied this TEV letter
Number directly to same model, same position measurement the insulation status of insulator of equipment it is directly proportional.According to this principle, come
Realization detects the internal discharge situation of equipment.
2, ultrasonic wave (Ultrasonic) testing principle: insulating materials surface can be in insulation material because of reasons such as dust humidities
Expect that surface forms surface-discharge, it is electric energy with sound that from the perspective of energy, electric discharge, which is the process of an energy prompt explosion,
The process that the forms such as energy, luminous energy, thermal energy, electromagnetic energy discharge, when electrical breakdown occurring in the air gap, electric discharge is instantaneous complete
At electric energy instantaneous conversion is the expansion of thermal energy guiding discharge center gas, and this result instantaneously expanded is in the form of a sound wave
It blazes abroad, is exactly initial sound source, with initial Acoustic Wave Propagation, the gas in propagation regions is heated, and forms one etc.
Warm area, temperature are higher than environment temperature, and when these gas coolings, gas starts to shrink again, and the result of contraction is exactly compared with low frequency
The subsequent wave of rate and intensity, it can be audible sound wave or ultrasonic wave.Ultrasonic wave refers to that vibration frequency is greater than 20KHz or more,
The sound wave that people can not hear and experience in a natural environment.Then heterodyne method (Heterodyning) is utilized, by what is be received
Signal be converted into a human ear can differentiate, audible voice signal, and will discharge caused by ultrasonic wave size with voltage (dB
μ V) form show, user by analysis earphone in transmit electric discharge sound and display screen on acoustic pressure size come
Judge inside switch cabinet with the presence or absence of surface discharge phenomena.
Heterodyne method principle is like radio, ultrasonic signal accurately can be converted into sound, people is allowed easily to distinguish
Recognize and understands.Sensor receives ultrasonic signal, after host frequency-selecting, selects and wants received ultrasonic signal.Meanwhile
In host, there is a local oscillator, generates one with receiving the much the same local oscillation signal of frequency, it is mixed with receiving signal,
Difference frequency is generated, this difference frequency is exactly intermediate-freuqncy signal.Intermediate-freuqncy signal is amplified using frequency-selecting of intermediate frequency, and then detection again, just obtains
Audio signal originally.Audio signal passes through after power amplification, so that it may send to earphone sounding.
Since the size of acoustic monitoring method and acoustical signal has much relations, it is therefore necessary to have very high sensitivity, ability
The faint acoustical signal for starting to generate when electric discharge is captured, while false alarm cannot be caused by the interference of noise again.In order to reach
To the purpose that do not interfered by outside noise, the frequency range taken must avoid the frequency range of audible sound, i.e. 20Hz -20kHz,
So the acoustical signal that frequency should be taken to be greater than 20kHz, i.e. ultrasonic wave.
Existing research achievement shows that its frequency spectrum is very since the discharge time each time of surface-discharge is all very short
Width, the acoustical signal spectrum that corresponding electric discharge generates is also very wide, and spectral range is from hundreds of hertz to several megahertzs.The test having from oneself
As a result from the point of view of, the spectrum component of acoustic emission signal is concentrated mainly between 20kHz -150kHz, in order to improve sensitivity, Ying Xuan
The maximum frequency of spectrum component is selected, so frequency should consider further that signal frequency is higher, in air in 20kHz -150kHz
Decaying when middle propagation is bigger, and this technology has selected centre frequency of this frequency of 40kHz as sensor.
Ultrasonic sensor uses piezoelectric type sonic transducer in the present invention, and the vibration mode of piezo-electric crystal uses bending vibration
Dynamic, because the structure of bending vibration PZT (piezoelectric transducer) is simple, size is small, light-weight, electromechanical coupling factor is high, and Q value is high, be easy to
Air matching.
Refering to what is shown in Fig. 1,10kV on-pole switch electrification partial discharge test piezoelectric type detector of sound, including it is piezoelectric element, solid
Reservation 6, shell 2, the fixing seat and piezoelectric element are set in shell, and the piezoelectric element includes the two piezoelectricity potteries being stacked
Porcelain chip 5 and the glued sheet metal 4 being fixed between two piezoelectric ceramic wafers, the sheet metal extend to piezoelectric ceramics
Other than chip, the surface of the piezoelectric ceramic wafer is coated with layer of surface electrode, and the surface electrode is through conducting wire and output electrode 7
Connection is connected in the center portion combined axis of piezoelectric element with coniform cone 3 of pushing to, and the piezoelectric element is with freely-supported
The form on side is fixed on fixed pedestal, and the top of the metal shell is equipped with chain link fence 1.
Wherein, the sheet metal is fixed with piezoelectric ceramic wafer using Low-temperature epoxy resinoid bond.The surface electrode
Piezoelectric ceramic wafer surface is incorporated in using the method for surface evaporation plated film.The centre frequency of the piezoelectric type detector of sound is
40kHz, sensitivity about -65dB.
Generally there are three types of forms for the processing on piezo-electric crystal boundary: A, folder is aided the border areas, and boundary rigidly fixes；B, simple supported edge, side
It is clamped with blade on boundary；C, free margins, boundary are under no restraint.It is extremely low to press from both sides the electromechanical lotus root conjunction aided the border areas, the spirit of sensor can be reduced
Sensitivity, therefore not use；The installation of free margins structure is inconvenient, can not use；It is simple supported edge portable construction, solid, and fill
The loss set is reduced to minimum level, is supported by most commonly used boundary.What is used in this technique is also simple supported edge structure.
After the boundary of piezo-electric crystal and piezo-electric crystal has been determined, it is also necessary to design the overall structure of sensor.For connecing
The sensor of receipts always expects to have lower impedance value, to receive weaker acoustical signal and to export biggish voltage signal.
The overall structure types of sensor are very big on receptivity influence, by test of many times and comparison, devise sensor.Sensor
Structure is open type, have many advantages, such as high sensitivity, it is small in size, be easy to make.
In order to improve sensor mechanical performance and mechanical-electric coupling and structure installation convenience, between two potsherds
Glued piece of metal thin slice.For the ease of supporting and being electrically connected, sheet metal is extended to other than piezoelectric ceramic piece.Once piezoelectricity
Any sliding of appearance between layers of ceramics and sheet metal, it will significantly reduce the performance of sensor, therefore cementing layer wants non-
It is often thin, firm and stable.Gluing between metal and ceramics, using Low-temperature epoxy resin, since the thickness of cementing layer is to sensing
The frequency of device can have an impact, and must apply in Curing Process of Epoxy with pressure appropriate, make cementing layer uniformly, in conjunction with tight
It is close.The surface of piezoelectric ceramics is coated with one layer of metallic conductor, that is, electrode.When acoustic pressure acts on piezoelectric ceramics, in piezoelectricity
The charge that ceramic surface generates is bound charge, cannot be read by circuit, bound charge is changed into free electricity by the effect of electrode
Lotus, to be read by circuit.Metal electrode must be closely linked with piezoelectric ceramics, so using surface evaporation plated film
Method.Surface electrode is connect through conducting wire with output electrode.Piezoelectric element is fixed in the form of simple supported edge on the base, in piezoelectricity
The center portion combined axis of component is connected with coniform cone of pushing to, and pushing cone to can effectively concentrate on pressing by acoustic pressure
The receiving sensitivity of sensor is improved at the center of transistor.Above-mentioned component is all placed in metal shell, metal shell
Front end with groups of metal filaments at protective net replace, so that sound wave is incident on piezoelectric ceramics.
The exclusion of positioning and the interference of partial discharge.
Refering to what is shown in Fig. 2, positioning determines the position of discharge activities according to TEV signal elapsed time, principle is to adopt
The time required for each sensor is arrived separately at TEV signal is compared, positioning system indicates which sensor is first triggered, into
And show that this sensor is closer from the electrical distance of point of discharge.
The accurate positioning method of step S4 are as follows: the located lateral of first switchgear, when two sensors trigger simultaneously, say
Bright discharge position is on the middle line of two sensors, and similarly, we position in the longitudinal direction of switchgear, same to determine in one
Line, the intersection point of two middle lines are exactly the specific location of shelf depreciation.But we are it is noted that the following in the detection process:
Sometimes two sensor-triggereds are unstable, make us not judge.Occur such case the reason of first is that two
The time phase difference very little that signal on sensor arrives at, has been more than the resolution ratio of positioning system.It is also likely to be since two sense
Caused by being equidistant of device and point of discharge.As long as slightly moving any one sensor, positioning system can be separated
It is which sensor is first triggered.
It is remotely the presence of strong discharge activities from measurement position there are also a kind of situation.Due to declining for signal high fdrequency component
Subtract, signal is distorted in the forward position of waveform after the transmission of relatively long distance.And the because speed that signal different frequency component is propagated
It spends slightly different, causes the forward position of waveform further to distort, positioning system is made to be difficult to differentiate between which sensor is first triggered.Noise
Interference also results in positioning system judgement and randomness occurs, has especially decayed after multiple reflections in signal energy very much
In the case of.
If the electrical centre point position between two sensors is between two (or multiple) point of discharges, and center position
Right side in the right point of discharge, then the detector on the left side will be triggered first always, vice versa.Therefore, when there is many places electric discharge
When point, it can be found that the channel indicator light of two detectors is all bright in some particular detection region, and sensor once goes out
This region can significantly extraction of signal it is successive.This specific region is usually exactly the distribution of point of discharge.
The exclusion of interference:
Distinguishing interference, there are many methods.The electric discharge triggered time interval detected shows distinctive randomness.Due to electricity
The interference triggering of gas or electronic equipment is distinguishable to be come out, because it is regular or with certain periodically just as radio
Signal transmitting, electric drill, the phone of during dialing, process automobile issue signal it is the same.
Usual pot life difference technology finds out signal propagation direction to determine and interfere with equipment under test electric discharge apart from each other
Source.The interference signal of distant place can also be distinguished from comparator probe in the signal intensity that different location measures.If at some
Position measures very strong signal and the signal that slightly moves to another place just weakens much immediately, this explanation nearby nearby has electric discharge work
It is dynamic.And the equal difference of reading that each position measures in equipment is little, illustrate the position of point of discharge (activity may relatively strong) from
Farther out.
The analysis method of step S5 includes horizontal analysis:
The analysis assumes that apparent difference is not present in the apparatus insulated level of switchgear in the same switch gear room, can pass through
The average level of homogeneous measurement result is analyzed, and measures individual and deviates the degree of overall average level to judge that equipment whether there is
Insulation defect.For the above analysis, lateral comparison is carried out to the test result of switchgear in the same switch gear room, when a certain switch
The test result of cabinet individual than other switchgears test result and big background scene value when, then tentatively it is considered that this equipment
A possibility that existing defects, is larger.
The analysis method of step S5 includes trend analysis:
Analysis assumes that sudden deterioration will not occur for the dielectric level of equipment, and successional partial discharge test data is not in
Big difference, i.e. variable quantity keep stablizing, and fluctuate around zero point.The test result of same switchgear different time is divided
Analysis, so that comparative analysis obtains the operation conditions of switchgear.It needs periodically to detect switch cubicle switch cabinet, and will
The result archive backups detected every time, in order to analyze the variation of apparatus local discharge state in different time, so that judgement is set
Standby operation conditions.
The analysis method of step S5 includes statistical analysis:
Overall operation situation in each substation's different voltages level switch cabinet certain period of time can be counted
Analysis calculates its typical statistic parameters, and combines and assume certain probability Distribution Model, calculates put corresponding with probability of malfunction value
It is electric horizontal.
The analysis method of step S5 includes threshold value comparison:
With statistically analyze calculate obtain discharge level judge the likelihood of failure of equipment, and provide " normal ", " concern ",
A variety of aid decision suggestions such as " early warning " and " maintenance ".
Three threshold values Q1, Q2, Q3 are provided, which is obtained by above-mentioned statistical analysis.By the testing result Ve of certain switchgear
It is compared with these three threshold values, the operating status of the available switchgear at present, operating status includes: normally, pays close attention to, is pre-
Alert and maintenance.
10kV on-pole switch charges partial discharge inspection, and benefit is evident
1, solve the problems, such as that 10kV on-pole switch can not carry out live detection, it is determined that the shape in switch charging operation
State；
2, it saves the time, be restricted less
Traditional power failure detection is done to be limited by place:
If scene is without 220V power supply, then need to carry out dismounting replacement；If there is power supply at scene, then tester must upper boom work
Industry, work difficulty are big.
It does traditional power failure and detects on trial batch of conditionality:
Necessary pre- first to file has a power failure, and carries out examination & approval, could replace switch.Existing electricity consumption reliability requirement is high, and have a power failure examination & approval
Difficulty, the method exist uncertain.
3, the comparison of the test of 10kV on-pole switch electrification partial discharge and tradition power failure detection, electrification partial discharge test are with the obvious advantage.
Electrification partial discharge test tradition relatively have a power failure more be exchanged with experiment include it is time-consuming it is short, have a power failure without user, staff
Less, it is limited less without power supply bureau's internal communication coordination, equipment and special instrument, 1/4 that expense is traditional power failure testing cost, together
When power supply enterprise do not lose, user is without power failure.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, is familiar with
The those skilled in the art should be understood that the present invention includes but is not limited to attached drawing and interior described in specific embodiment above
Hold.Any modification without departing from function and structure principle of the invention is intended to be included in the range of claims.
Claims (9)
1.10kV route on-pole switch charges partial discharge test method, it is characterised in that includes the following steps:；
S1 tests environment amplitude using partial discharge test equipment；
S2 carries out transient state voltage-to-ground to 10kV on-pole switch using partial discharge test equipment and detects；
S3 carries out ultrasound examination to 10kV on-pole switch using partial discharge test equipment；
Carry out when S4, discovery are to transient state voltage-to-ground or excessively high ultrasonic wave and is accurately positioned；
S5 analyzes test data, determines equipment state.
2. 10kV route on-pole switch according to claim 1 charges partial discharge test method, which is characterized in that step S4's
Accurate positioning method are as follows: the located lateral of first switchgear illustrates that discharge position is visited at two when two detectors trigger simultaneously
It surveys on the middle line of device, then the longitudinal register of switchgear, equally determines that a middle line, the intersection point of two middle lines, exactly part are put
The specific location of electricity.
3. 10kV route on-pole switch according to claim 1 charges partial discharge test method, which is characterized in that visited when two
It is unstable to survey device triggering, when can not judge, any one mobile detector, it is that positioning system separates for which detector elder generation quilt
Triggering.
4. 10kV route on-pole switch according to claim 1 charges partial discharge test method, which is characterized in that when there is many places
When point of discharge, discovery channel indicator light of two detectors in some particular detection region is all bright, and detector once goes out
This region can significantly extraction of signal it is successive, this specific region is logical be exactly point of discharge distribution.
5. 10kV route on-pole switch according to claim 1 charges partial discharge test method, which is characterized in that step S5's
Analysis method includes horizontal analysis: it is apparent that the analysis assumes that the apparatus insulated level of switchgear in the same switch gear room is not present
Difference by analyzing the average level of homogeneous measurement result, and measures individual and deviates the degree of overall average level to judge to set
It is standby to whether there is insulation defect.
6. 10kV route on-pole switch according to claim 1 charges partial discharge test method, which is characterized in that step S5's
Analysis method includes trend analysis: the analysis assumes that sudden deterioration, successional partial discharge will not occur for the dielectric level of equipment
Test data is not in big difference, i.e., variable quantity keeps stablizing, and fluctuates around zero point, to same switchgear different time
Test result analyzed, so that comparative analysis obtains the operation conditions of switchgear.
7. 10kV route on-pole switch according to claim 1 charges partial discharge test method, which is characterized in that step S5's
Analysis method includes statistical analysis: to the overall operation situation in each substation's different voltages level switch cabinet certain period of time
It is for statistical analysis, its typical statistic parameters is calculated, and combine and assume certain probability Distribution Model, calculated and probability of malfunction value
Corresponding discharge level.
8. 10kV route on-pole switch according to claim 7 charges partial discharge test method, which is characterized in that step S5's
Analysis method includes threshold value comparison: to statistically analyze the likelihood of failure that the discharge level for calculating and obtaining judges equipment, providing three
A threshold value Q1, Q2, Q3, the threshold value are obtained by above-mentioned statistical analysis, by the testing result Ve of certain switchgear and these three threshold values into
Row compares, and obtains the operating status of the current switchgear, and operating status includes: normal, concern, early warning and maintenance,
Ve < Q1 operating status: normal
Q1≤Ve≤Q2 operating status: concern
Q2≤Ve≤Q3 operating status: early warning
Q3 < Ve operating status: maintenance.
9. 10kV route on-pole switch according to claim 1 charges partial discharge test method, which is characterized in that utilize electrification
Operation Van send tester and partial discharge test equipment to close to the position on-pole switch 1m.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110347717A (en) * | 2019-05-28 | 2019-10-18 | 国家电网有限公司 | A kind of big data storage method based on urban electric power equipment monitoring |
| CN117630612A (en) * | 2024-01-25 | 2024-03-01 | 国网辽宁省电力有限公司电力科学研究院 | Discharge detection device and method for mixed gas insulation substation equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520326A (en) * | 2012-01-09 | 2012-06-27 | 云南电力试验研究院（集团）有限公司电力研究院 | Partial discharge charged detection comprehensive diagnosis method of GIS (Gas Insulated Switchgear) for electric power |
| CN102692588A (en) * | 2012-06-08 | 2012-09-26 | 华北电力大学（保定） | Partial discharge detecting and positioning system and method of high-tension switch cabinet |
| KR101303082B1 (en) * | 2012-03-15 | 2013-09-03 | 오피전력기술 주식회사 | Apparatus for detecting partial discharge of portable |
| CN103364698A (en) * | 2013-07-23 | 2013-10-23 | 国家电网公司 | Detection method for rapidly positioning local discharge of GIS (geographic information system) by using ultrasonic testing technology |
| CN104808124A (en) * | 2015-04-30 | 2015-07-29 | 国家电网公司 | Acoustic-electric combined positioning method of switch cabinet local discharge fault positions |
| CN106291149A (en) * | 2015-05-22 | 2017-01-04 | 中国电力科学研究院 | A kind of live detection method of 10kV switch cubicle |
| CN108535617A (en) * | 2018-07-09 | 2018-09-14 | 闽江学院 | A kind of partial discharge positioning method and positioning system of switchgear |
-
2018
- 2018-11-08 CN CN201811324360.1A patent/CN109507548A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520326A (en) * | 2012-01-09 | 2012-06-27 | 云南电力试验研究院（集团）有限公司电力研究院 | Partial discharge charged detection comprehensive diagnosis method of GIS (Gas Insulated Switchgear) for electric power |
| KR101303082B1 (en) * | 2012-03-15 | 2013-09-03 | 오피전력기술 주식회사 | Apparatus for detecting partial discharge of portable |
| CN102692588A (en) * | 2012-06-08 | 2012-09-26 | 华北电力大学（保定） | Partial discharge detecting and positioning system and method of high-tension switch cabinet |
| CN103364698A (en) * | 2013-07-23 | 2013-10-23 | 国家电网公司 | Detection method for rapidly positioning local discharge of GIS (geographic information system) by using ultrasonic testing technology |
| CN104808124A (en) * | 2015-04-30 | 2015-07-29 | 国家电网公司 | Acoustic-electric combined positioning method of switch cabinet local discharge fault positions |
| CN106291149A (en) * | 2015-05-22 | 2017-01-04 | 中国电力科学研究院 | A kind of live detection method of 10kV switch cubicle |
| CN108535617A (en) * | 2018-07-09 | 2018-09-14 | 闽江学院 | A kind of partial discharge positioning method and positioning system of switchgear |
Non-Patent Citations (4)
| Title |
|---|
| 李永祥 等: "基于多种检测技术的高压开关柜内部局部放电检测与分析", 《高压电器》 * |
| 林俊浩: "开关柜局放的超声波及地电波检测技术研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 陈南: "高开开关柜局部放电检测技术的应用研究", 《电脑知识与技术》 * |
| 高佳琦 等: "暂态对地电压测试技术在高压开关柜局部放电检测定位中的应用", 《电气时代》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110347717A (en) * | 2019-05-28 | 2019-10-18 | 国家电网有限公司 | A kind of big data storage method based on urban electric power equipment monitoring |
| CN117630612A (en) * | 2024-01-25 | 2024-03-01 | 国网辽宁省电力有限公司电力科学研究院 | Discharge detection device and method for mixed gas insulation substation equipment |
| CN117630612B (en) * | 2024-01-25 | 2024-04-16 | 国网辽宁省电力有限公司电力科学研究院 | Discharge detection device and method for mixed gas insulation substation equipment |
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