CN106597147A - State monitoring system and method of lightning arrester with series gap based on residual voltage monitoring - Google Patents
State monitoring system and method of lightning arrester with series gap based on residual voltage monitoring Download PDFInfo
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- CN106597147A CN106597147A CN201611052963.1A CN201611052963A CN106597147A CN 106597147 A CN106597147 A CN 106597147A CN 201611052963 A CN201611052963 A CN 201611052963A CN 106597147 A CN106597147 A CN 106597147A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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Abstract
The invention relates to a state monitoring system and method of a lightning arrester with a series gap based on residual voltage monitoring. The system comprises the lightning arrester, a ceramic capacitor insulator, a residual voltage monitoring device and a background lightning arrester state monitoring center, a certain gap is arranged between one side of the lightning arrester and a high-voltage transmission line, the other side of the lightning arrester is electrically connected with a ground wire, the ceramic capacitor insulator comprises a high-voltage arm and a low-voltage arm electrically connected in sequence, the high-voltage arm is electrically connected to the high-voltage transmission line, the low-voltage arm is electrically connected with the ground wire, the residual voltage monitoring device is fixed to a tower, and the residual voltage monitoring device is connected to two ends of the low-voltage arm of the ceramic capacitor insulator. By employing the monitoring system, the operation state of the lightning arrester can be determined by employing the residual voltage waveform of the lightning arrester, and the monitoring efficiency and the precision of the state of the lightning arrester are effectively improved.
Description
Technical field
The present invention relates to power system spark gap monitoring technical field, more particularly to a kind of band series connection monitored based on residual voltage
Clearance type spark gap condition monitoring system and method.
Background technology
At present, in power system, spark gap state monitoring method is based on leakage current monitoring, it is proposed that as leaked electricity
The methods such as stream method, penalty method, triple-frequency harmonics method (zero sequence drying method) and fundamental harmonic resistant leakage current method are detected.But, these
Method is only applicable to the spark gap of not series gap, for the spark gap of band gap, because spark gap is not directly contacted with system,
Cause to may not apply to the spark gap of band gap using the method for the Leakage Current under monitoring running status.
In recent years, domestic many grid companies cause circuit breaker trip to reduce transmission line lightning stroke overvoltage, defeated
Band gap type leakage conductor is mounted with electric line, the use of band gap type electric transmission line lightning arrester considerably reduces damage to crops caused by thunder
The generation of accident, is widely used.But because band gap type spark gap is not directly contacted with transmission line of electricity, spark gap is being grown
Protection feature is caused to decline in phase operation, operation of power networks unit cannot be visually known, it is necessary to which have a power failure test inspection, therefore for
The online status monitoring of clearance type leakage conductor is significant.
The content of the invention
To overcome problem present in correlation technique, the present invention to provide a kind of series gap type monitored based on residual voltage and keep away
Thunder device condition monitoring system and method.
A kind of first aspect according to embodiments of the present invention, there is provided series gap type spark gap shape monitored based on residual voltage
State monitoring system, including spark gap, ceramic condenser insulator, residual voltage monitoring device and backstage spark gap status monitoring center,
Wherein：
The side of the spark gap has certain interval, opposite side and is electrically connected to ground with ultra-high-tension power transmission line；
The ceramic condenser insulator includes high-voltage arm and the low-voltage arm being sequentially connected electrically, and the high-voltage arm electrical connection is paramount
Pressure transmission line, the low-voltage arm be electrically connected to ground；
The residual voltage monitoring device is fixed on shaft tower, and the residual voltage monitoring device is connected to the ceramic condenser insulator
Low-voltage arm two ends, the residual voltage monitoring device is used to measuring the residual voltage Data Concurrent of spark gap delivers to the backstage spark gap
Status monitoring center.
Preferably, the residual voltage monitoring device includes electricity-fetching module, digital sampling and processing and transport module, described to take
Electric module is respectively electrically connected to the digital sampling and processing and transport module, the digital sampling and processing and the biography
Defeated module electrical connection, and the electricity-fetching module is connected to the two ends of the ceramic condenser insulator low-voltage arm.
Preferably, the transport module is set to GPRS module or WIFI module.
Preferably, the residual voltage monitoring device also includes build-out resistor, described build-out resistor one end and the ceramic condenser
The low-voltage arm electrical connection of insulator, the other end is electrically connected with the digital sampling and processing.
Preferably, the ceramic condenser insulator is set to pin insulator, pillar insulator, suspension insulator or porcelain horizontal stroke
Load formula insulator.
Preferably, the intrinsic standoff ratio between the high-voltage arm and low-voltage arm is 500-3000.
Preferably, the capacitance of the high-voltage arm is 10pF-10nF, and the capacitance of the low-voltage arm is 10nF-10uF.
A kind of second aspect according to embodiments of the present invention, there is provided series gap type spark gap shape monitored based on residual voltage
State monitoring method, including：
The low-voltage arm of the ceramic condenser insulator that the digital sampling and processing in residual voltage monitoring device is gathered is obtained in real time
On voltage；
Over-voltage waveform in 20-100ms is recorded according to the voltage starting over-voltage monitoring device；
The over-voltage waveform of record is sent to backstage spark gap status monitoring center, to surpass when Overvoltage Amplitude
When crossing 0.5 times of the specified residual voltage amplitude of spark gap, backstage spark gap status monitoring center analysis process over-voltage waveform, calculate
Residual voltage value, the rise time of residual voltage waveform, hemiwave time, are contrasted to judge the state of spark gap with standard residual voltage waveform.
Preferably, the over-voltage waveform recorded according to the voltage starting over-voltage monitoring device in 20-100ms,
Including：
Judge that whether the voltage be 1.2 times or 1.5 times of system voltage, or whether the voltage includes 500Hz-
The high-frequency signal of 2000Hz；
When the voltage includes the high frequency of 500Hz-2000Hz for 1.2 times or 1.5 times of system voltage, or the voltage
During signal, start the over-voltage waveform in over-voltage monitoring device record 20-100ms.
Preferably, it is described when Overvoltage Amplitude exceedes 0.5 times of the specified residual voltage amplitude of spark gap, backstage spark gap state
Monitoring center analyzes and processes over-voltage waveform, calculates residual voltage value, the rise time of residual voltage waveform, hemiwave time, residual with standard
Corrugating is contrasted to judge the state of spark gap, including：
When Overvoltage Amplitude exceedes 0.5 times of the specified residual voltage amplitude of spark gap, in the backstage spark gap status monitoring
The heart calculates residual voltage value, the rise time of residual voltage waveform and hemiwave time according to the over-voltage waveform；
Judge the residual voltage value, the rise time of residual voltage waveform and hemiwave time whether beyond preset value；
When the residual voltage value, the rise time of residual voltage waveform and hemiwave time exceed preset value, the spark gap is determined
Generation is abnormal.
The technical scheme that embodiments of the invention are provided can include following beneficial effect：
Spark gap condition monitoring system provided in an embodiment of the present invention includes spark gap, ceramic condenser insulator, residual voltage prison
Device and backstage spark gap status monitoring center are surveyed, wherein：The side of the spark gap has certain with ultra-high-tension power transmission line
Gap, opposite side and it is electrically connected to ground；The ceramic condenser insulator includes high-voltage arm and the low-voltage arm being sequentially connected electrically, described
High-voltage arm is electrically connected to ultra-high-tension power transmission line, the low-voltage arm be electrically connected to ground；The residual voltage monitoring device is fixed on shaft tower
On, the residual voltage monitoring device is connected to the two ends of the low-voltage arm of the ceramic condenser insulator, and the residual voltage monitoring device is used
The backstage spark gap status monitoring center is delivered in the residual voltage Data Concurrent for measuring spark gap.By adopting the embodiment of the present invention
The partial pressure unit that the monitoring system of offer can be constituted according to the high-voltage arm of ceramic condenser insulator and low-voltage arm, monitors spark gap
The residual voltage at two ends, and by residual voltage monitoring device direct detection residual voltage of arrester, so as to be supervised in real time to the state of spark gap
Control, so as to com-parison and analysis judge the running status of spark gap.Meanwhile, using higfh-tension ceramics capacitive isolator dielectric strength height, machine
Tool performance is good, low price the advantages of, directly hang over and constitute on transmission line of electricity partial pressure unit, and power taking and potentiometer effect, energy
Enough complete and accurate ground record residual voltage of arrester waveforms, using the operation of the online spark gap of real-time judge by residual voltage of arrester waveform
State, can greatly reduce the loss for needing power-off monitoring to cause, and effectively improve monitoring efficiency and essence to spark gap state
Accuracy.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not
The present invention can be limited.
Description of the drawings
Accompanying drawing herein is merged in description and constitutes the part of this specification, shows the enforcement for meeting the present invention
Example, and be used to explain the principle of the present invention together with description.
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is a kind of structural representation of spark gap condition monitoring system provided in an embodiment of the present invention；
Fig. 2 is the theory structure schematic diagram of spark gap condition monitoring system provided in an embodiment of the present invention；
Fig. 3 is a kind of schematic flow sheet of spark gap state monitoring method provided in an embodiment of the present invention；
Fig. 4 is the schematic flow sheet of another kind of spark gap state monitoring method provided in an embodiment of the present invention.
Specific embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Explained below is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.Conversely, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects described in detail in claims, the present invention.
Fig. 1 is a kind of structural representation of the spark gap condition monitoring system according to an exemplary embodiment.
As shown in figure 1, the spark gap condition monitoring system includes spark gap 1, ceramic condenser insulator, residual voltage monitoring device
2nd, ultra-high-tension power transmission line, shaft tower and backstage spark gap status monitoring center 3.Wherein,
The side of the spark gap 1 with ultra-high-tension power transmission line there is certain interval, the opposite side of spark gap 1 and ground wire to be electrically connected
Connect, the ceramic condenser insulator includes high-voltage arm C1 and low-voltage arm C2 being sequentially connected electrically, the high-voltage arm C1 is electrically connected to
Ultra-high-tension power transmission line, low-voltage arm C2 be electrically connected to ground so that high-voltage arm C1 and low-voltage arm C2 constitute partial pressure unit, its
In, the intrinsic standoff ratio between the high-voltage arm C1 and low-voltage arm C2 is 500-3000, and the capacitance of the high-voltage arm C1 is 10pF-
10nF, the capacitance of low-voltage arm C2 is 10nF-10uF；The ceramic condenser insulator can be to pour higfh-tension ceramics electric capacity
Fill in epoxy resin or be directly packaged in the ceramic condenser insulator of the high insulation resistance inside ceramic insulator, the ceramics
Capacitive isolator includes pin insulator, pillar insulator, suspension insulator or porcelain pole arm formula insulator, in Ceramics electric capacity
Pin insulator, pillar insulator, the suspension insulator that can be matched with infield according to field condition selection during insulator
Son and porcelain pole arm formula insulator one kind therein, or, two or more combination.The residual voltage monitoring device 2 and pottery
Porcelain capacitive isolator connects, wherein, the residual voltage monitoring device 2 is fixed on shaft tower, and the residual voltage monitoring device 2 is connected to institute
State between low-voltage arm C2 of ceramic condenser insulator and high-voltage arm C1, the residual voltage monitoring device 2 is supervised with backstage spark gap state
Measured center 3 is communicated to connect.So as to the voltage waveform of collection is sent to backstage spark gap status monitoring by residual voltage monitoring device 2
Center 3, so that backstage spark gap status monitoring center 3 determines whether spark gap 1 is abnormal according to the change of the over-voltage waveform.
In embodiments of the present invention, there is certain interval between one end of the spark gap 1 and ultra-high-tension power transmission line, it is another
End is connected with ground wire, so as to form between clearance type leakage conductor, and the spark gap 1 and ground wire and connect current transformer；
The ceramic condenser insulator includes the partial pressure unit being made up of high-voltage arm C1 and low-voltage arm C2, wherein, the low-voltage arm C2 bag
Multiple electric capacity being connected in parallel are included, so that capacitance of the capacitance of low-voltage arm C2 less than high-voltage arm C1, wherein, at this
In bright embodiment, the capacitance of the high-voltage arm C1 can be 10pF-10nF, and the capacitance of low-voltage arm C2 can be
10nF-10uF。
Wherein, in specific implementation process, the theory structure of spark gap condition monitoring system shown in Figure 2 is illustrated
Figure, as shown in Fig. 2 the residual voltage monitoring device 2 includes electricity-fetching module 21, digital sampling and processing 22 and transport module 23,
The electricity-fetching module 21 is respectively electrically connected to the digital sampling and processing 22 and transport module 23, the data acquisition process
Module 22 is electrically connected with the transport module 23, and the electricity-fetching module 21 is connected to ceramic condenser insulator low-voltage arm C2
Two ends, so as to be powered for electricity-fetching module 21 by spark gap 1, by electricity-fetching module 21 be the digital sampling and processing 22 and pass
Defeated module 23 is powered, meanwhile, the electricity at ceramic condenser insulator low-voltage arm C2 two ends is gathered by the digital sampling and processing 22
Pressure.The transport module 23 is communicated to connect with backstage spark gap status monitoring center 3, in specific implementation process, the transmission
Module 23 is set to GPRS module or WIFI module.
In embodiments of the present invention, the residual voltage monitoring device 2 also includes build-out resistor R, one end of build-out resistor R
Electrically connect with low-voltage arm C2 of the ceramic condenser insulator, the other end of build-out resistor R is electric with the electricity-fetching module 21
Connection, so as to ensure the power supply to electricity-fetching module 21.
By the way that using spark gap condition monitoring system provided in an embodiment of the present invention, high voltage ceramic capacitor is with dielectric pottery
Porcelain for the epoxy resin encapsulated of core material capacitor, it has dielectric strength high, and small volume and frequency characteristic wait well spy
Point, has been widely used as the sectional pressure element of distribution switch cabinet electricity detection equipment.Therefore the feature can be utilized, is encapsulated in insulation
Post inside is manufactured into the various transmission line of electricity ceramic condenser insulator of high insulation resistance, is joined directly together with transmission line of electricity or in parallel
At leakage conductor two ends, partial pressure unit is constituted, the residual voltage monitoring of power system spark gap is realized, using the residual voltage ripple of spark gap
Shape judges the state of spark gap, can effectively solving leakage conductor monitoring a difficult problem.
Meanwhile, the advantages of using higfh-tension ceramics capacitive isolator dielectric strength height, good mechanical property, low price, directly
Hang over and constitute on transmission line of electricity partial pressure unit, and power taking and potentiometer effect, being capable of complete and accurate ground record residual voltage of arrester ripple
Shape and action frequency, using residual voltage of arrester waveform the running status of spark gap is can determine whether, so as to effectively improve to spark gap
The monitoring efficiency and precision of state.
It is shown in Figure 3, it is the schematic flow sheet of spark gap state monitoring method provided in an embodiment of the present invention, such as Fig. 3
Shown, the method may comprise steps of.
In step S101, in real time the ceramic condenser of the digital sampling and processing collection in acquisition residual voltage monitoring device is exhausted
Voltage in the low-voltage arm of edge.
When voltage is got, in step s 102,20- is recorded according to the voltage starting over-voltage monitoring device
Over-voltage waveform in 100ms.
In specific implementation process, over-voltage monitoring device pair can be started by the frequency of the size of voltage and voltage
Over-voltage waveform is recorded, wherein it is possible to pass through to judge that whether the voltage be 1.2 times or 1.5 times of system voltage, or institute
State whether voltage includes the high-frequency signal of 500Hz-2000Hz to determine whether to start over-voltage monitoring device record 20-
Over-voltage waveform in 100ms.
In embodiments of the present invention, for system with effectively earthed neutral judges whether the voltage is system voltage
1.2 times, for system with non effectively earth ed neutral judges that whether the voltage be 1.5 times of system voltage, wherein, 1.2 times or
Also referred to as there is the voltage threshold size of residual voltage in 1.5 times of system voltage, so as to according to the size for judging magnitude of voltage and divide
In analysis voltage whether the high-frequency signal comprising 500Hz-2000Hz starting over-voltage monitoring device.Therefore, when the voltage is
1.2 times of system voltage or 1.5 times, or the voltage is when including the high-frequency signal of 500Hz-2000Hz, starts described excessively electric
Over-voltage waveform in pressure monitoring device record 20-100ms.
In step s 103, the over-voltage waveform of record is sent to backstage spark gap status monitoring center, so as to
Judge the state of spark gap.
In specific implementation process, backstage spark gap status monitoring center is exceeding the specified residual voltage of spark gap when Overvoltage Amplitude
When 0.5 times of amplitude, backstage spark gap status monitoring center analysis process over-voltage waveform, calculate residual voltage value, residual voltage waveform
Rise time, hemiwave time, contrasted with standard residual voltage waveform, so as to judge the state of spark gap, such as residual voltage value exceeds
Rated value, hemiwave time are extremely short, waveform exception etc. occurs and then thinks that spark gap has exception.
In embodiments of the present invention, the schematic flow sheet of another kind of spark gap state monitoring method shown in Fig. 4 is can be found in,
As shown in figure 4, step S103 can include following detailed step：
In step S1031, judge whether the Overvoltage Amplitude in over-voltage waveform exceedes the specified residual voltage amplitude of spark gap
0.5 times.
When Overvoltage Amplitude exceedes 0.5 times of the specified residual voltage amplitude of spark gap, in step S1032, the backstage is kept away
Thunder device status monitoring center calculates residual voltage value, the rise time of residual voltage waveform and hemiwave time according to the over-voltage waveform.
Otherwise, step S1031 is continued executing with.
Residual voltage waveform and action current waveform that backstage spark gap status monitoring center 3 passes through analysis 20-100ms, calculate
Go out residual voltage value, the rise time of residual voltage waveform and hemiwave time, wherein action current peak value, action current can also be calculated
The parameters such as rise time, hemiwave time, the numerical value and calculated value obtained with test is compared analysis, and such as residual voltage value exceeds
Rated value, hemiwave time are extremely short, voltage waveform and current waveform exception etc. occur and then think that spark gap 1 has exception.
In step S1033, judge the residual voltage value, the rise time of residual voltage waveform and hemiwave time whether beyond default
Value.
In embodiment of the present invention, residual voltage threshold value, the rising of residual voltage waveform that spark gap 1 produces residual voltage can be pre-set
The hemiwave time threshold value of time threshold and residual voltage waveform, and the residual voltage threshold value, the rise time threshold value of residual voltage waveform and residual voltage
The hemiwave time threshold value of waveform is when producing exception according to spark gap 1 for a long time there is the empirical value that residual voltage waveform draws.
When the residual voltage value, the rise time of residual voltage waveform and hemiwave time exceed preset value, in step S1034,
Determine that the spark gap occurs abnormal.Otherwise continue executing with step S101.
Between the related embodiment of above-mentioned method can mutually referring to, it may be necessary to according to based on residual voltage monitoring
The embodiment of series gap type spark gap condition monitoring system is illustrated, and here is not elaborated.
Those skilled in the art will readily occur to its of the present invention after considering description and putting into practice disclosure of the invention here
Its embodiment.The application is intended to any modification of the present invention, purposes or adaptations, these modifications, purposes or
Person's adaptations follow the general principle of the present invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the precision architecture for being described above and being shown in the drawings is the invention is not limited in, and
And can without departing from the scope carry out various modifications and changes.The scope of the present invention is only limited by appended claim.
Claims (10)
1. it is a kind of based on residual voltage monitor series gap type spark gap condition monitoring system, it is characterised in that including spark gap,
Ceramic condenser insulator, residual voltage monitoring device and backstage spark gap status monitoring center, wherein：
The side of the spark gap has certain interval, opposite side and is electrically connected to ground with ultra-high-tension power transmission line；
The ceramic condenser insulator includes high-voltage arm and the low-voltage arm being sequentially connected electrically, and it is defeated that the high-voltage arm is electrically connected to high pressure
Electric line, the low-voltage arm be electrically connected to ground；
The residual voltage monitoring device is fixed on shaft tower, and the residual voltage monitoring device is connected to the low of the ceramic condenser insulator
The two ends of pressure arm, the residual voltage monitoring device is used to measure the residual voltage Data Concurrent of spark gap and delivers to the backstage spark gap state
Monitoring center.
2. system according to claim 1, it is characterised in that the residual voltage monitoring device includes that electricity-fetching module, data are adopted
Collection processing module and transport module, the electricity-fetching module is respectively electrically connected to the digital sampling and processing and transport module,
The digital sampling and processing is electrically connected with the transport module, and the electricity-fetching module is connected to the ceramic condenser insulation
The two ends of sub- low-voltage arm.
3. system according to claim 2, it is characterised in that the transport module is set to GPRS module or WIFI moulds
Block.
4. system according to claim 2, it is characterised in that the residual voltage monitoring device also includes build-out resistor, described
Build-out resistor one end electrically connects with the low-voltage arm of the ceramic condenser insulator, and the other end and the digital sampling and processing are electric
Connection.
5. system according to claim 1, it is characterised in that the ceramic condenser insulator be set to pin insulator,
Pillar insulator, suspension insulator or porcelain pole arm formula insulator.
6. system according to claim 1, it is characterised in that the intrinsic standoff ratio between the high-voltage arm and low-voltage arm is 500-
3000。
7. system according to claim 1, it is characterised in that the capacitance of the high-voltage arm is 10pF-10nF, described low
The capacitance of pressure arm is 10nF-10uF.
8. it is a kind of based on residual voltage monitor series gap type spark gap state monitoring method, it is characterised in that include：
Obtain in real time in the low-voltage arm of the ceramic condenser insulator that the digital sampling and processing in residual voltage monitoring device is gathered
Voltage；
Over-voltage waveform in 20-100ms is recorded according to the voltage starting over-voltage monitoring device；
By record the over-voltage waveform send to backstage spark gap status monitoring center, so as to work as Overvoltage Amplitude exceed keep away
When 0.5 times of the specified residual voltage amplitude of thunder device, backstage spark gap status monitoring center analysis process over-voltage waveform, calculate residual voltage
Value, the rise time of residual voltage waveform, hemiwave time, are contrasted to judge the state of spark gap with standard residual voltage waveform.
9. method according to claim 8, it is characterised in that described to be remembered according to the voltage starting over-voltage monitoring device
Over-voltage waveform in record 20-100ms, including：
Judge that whether the voltage be 1.2 times or 1.5 times of system voltage, or whether the voltage includes 500Hz-2000Hz
High-frequency signal；
When the voltage includes the high-frequency signal of 500Hz-2000Hz for 1.2 times or 1.5 times of system voltage, or the voltage
When, start the over-voltage waveform in over-voltage monitoring device record 20-100ms.
10. method according to claim 8, it is characterised in that described when Overvoltage Amplitude exceedes the specified residual voltage of spark gap
When 0.5 times of amplitude, backstage spark gap status monitoring center analysis process over-voltage waveform, calculate residual voltage value, residual voltage waveform
Rise time, hemiwave time, contrasted to judge the state of spark gap with standard residual voltage waveform, including：
When Overvoltage Amplitude exceedes 0.5 times of the specified residual voltage amplitude of spark gap, the backstage spark gap status monitoring Central Radical
Residual voltage value, the rise time of residual voltage waveform and hemiwave time are calculated according to the over-voltage waveform；
Judge the residual voltage value, the rise time of residual voltage waveform and hemiwave time whether beyond preset value；
When the residual voltage value, the rise time of residual voltage waveform and hemiwave time exceed preset value, determine that the spark gap occurs
It is abnormal.
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| CN109387745A (en) * | 2018-12-21 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of power distribution network over-voltage sensing device |
| CN112054531A (en) * | 2020-09-24 | 2020-12-08 | 云南电网有限责任公司电力科学研究院 | Voltage-regulating and voltage-dividing ratio design method of hybrid full-compensation system based on fault phase residual voltage |
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| CN112505449A (en) * | 2020-11-20 | 2021-03-16 | 云南电网有限责任公司临沧供电局 | Lightning arrester state diagnosis system and method based on transient residual voltage fingerprint characteristics |
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| CN112054531B (en) * | 2020-09-24 | 2023-11-21 | 云南电网有限责任公司电力科学研究院 | Mixed full compensation system voltage regulating and dividing ratio design method based on fault phase residual voltage |
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| CN112505449B (en) * | 2020-11-20 | 2024-05-14 | 云南电网有限责任公司临沧供电局 | Lightning arrester state diagnosis system and method based on transient residual voltage fingerprint characteristics |
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| CN112730965A (en) * | 2020-12-23 | 2021-04-30 | 国网电力科学研究院武汉南瑞有限责任公司 | DC line arrester over-current full waveform data acquisition device and method |
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