CN107677939A - A kind of localization method of electric power GIS Partial Discharge Sources - Google Patents
A kind of localization method of electric power GIS Partial Discharge Sources Download PDFInfo
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- CN107677939A CN107677939A CN201710673397.4A CN201710673397A CN107677939A CN 107677939 A CN107677939 A CN 107677939A CN 201710673397 A CN201710673397 A CN 201710673397A CN 107677939 A CN107677939 A CN 107677939A
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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
- G01R31/1209—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 using acoustic measurements
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- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
- Gas-Insulated Switchgears (AREA)
- Locating Faults (AREA)
Abstract
The present invention relates to a kind of localization method of electric power GIS Partial Discharge Sources, comprise the following steps：1. carrying out general survey to GIS with superfrequency logging, the approximate region of discharge source is primarily determined that according to the wave character and signal intensity that detect；2. carrying out positioning using TDOA using superfrequency positioning mode, the smaller region of discharge of discharge source is determined, further reduces the scope of discharge source region；3. the particular location of point of discharge is determined in described region of discharge using ultrasonic wave positioning mode.The present invention combines superfrequency detection technique and ultrasonic detection technology and carries out alignment by union to discharge source, the point of discharge in GIS can quickly and accurately be positioned, it is easy to carry out relevant treatment early, equipment fault is developed into so as to be reduced or avoided, improves GIS operational reliability.
Description
Technical field
The present invention relates to power domain, more particularly to a kind of localization method of electric power GIS Partial Discharge Sources.
Background technology
Sulfur hexafluoride (SF6) because of its stable physicochemical property, excellent electric insulation and arc extinction performance, in power system
It is used widely in the totally enclosed type combined electrical apparatus (Gas Insulated Switchgear, GIS) of each voltage class.Although
GIS reliability is better than open type electrical equipment, but failure still occurs in it in operation.GIS may be because of manufacture, erector
The latency insulation defect that occurs in skill or longtime running and cause different degrees of shelf depreciation, long-standing shelf depreciation
Make insulation degradation, cause the failures such as final insulation breakdown and edge flashing.
GIS safe operation is most important to stablizing for whole power system, once breaking down, will cause administrative office
Portion is regional or even all area has a power failure.Thus it must as early as possible find by various technological means and handle GIS defects and hidden danger,
It is reduced or avoided and develops into equipment fault, improves GIS operational reliability.
From cause failure to occur the defects of from the point of view of species, insulation class defect mainly includes：Free conductive particle, metal tip
End, defects of insulator and floating potential, these defects often inspire the frequency electromagnetic waves that frequency range is up to Gigahertz,
But due to the structure and signal attenuation characteristic that GIS device is complicated, quickly and accurately position the point of discharge in GIS and also exist a lot
It is difficult.
The content of the invention
The present invention is in order to solve the above-mentioned technical problem, there is provided a kind of localization method of electric power GIS Partial Discharge Sources, it can be fast
Speed, the exactly point of discharge in positioning GIS, are easy to carry out relevant treatment early, equipment fault are developed into so as to be reduced or avoided,
Improve GIS operational reliability.
The above-mentioned technical problem of the present invention is mainly what is be addressed by following technical proposals：The electric power GIS of the present invention
The localization method of Partial Discharge Sources, comprises the following steps：
1. carrying out general survey to GIS with superfrequency logging, primarily determined that according to the wave character and signal intensity that detect
The approximate region of discharge source；
2. carrying out positioning using TDOA using superfrequency positioning mode, the smaller region of discharge of discharge source is determined；
3. the particular location of point of discharge is determined in described region of discharge using ultrasonic wave positioning mode.
The present invention combines superfrequency detection technique and ultrasonic detection technology and carries out alignment by union to discharge source, can it is quick,
The point of discharge in GIS is positioned exactly, is easy to carry out relevant treatment early, is developed into equipment fault so as to be reduced or avoided, carry
High GIS operational reliability.
Preferably, described superfrequency positioning mode is：Two spies being monitored to ultra-high frequency signal are set in GIS
High frequency sensors, with high-speed oscilloscope to two superfrequency Sensor monitorings to the waveform of ultra-high frequency signal synchronize note
Record, using the time difference for two waveforms that recorded, by the smaller region of discharge for calculating determination discharge source.Further reduce and put
The scope of power supply region.
Preferably, the circular of described region of discharge is：
Wherein, L is the distance between two described extra-high video sensors, and x is discharge source extra-high to be kept pouring in one of them
The distance of sensor, from described high-speed oscilloscope obtain two superfrequency Sensor monitorings to two ultra-high frequency signal waveforms
Time difference is Δ t, and c is the equivalent spread speed of electromagnetic wave in GIS, and c value is 3 × 108m/s。
Extra-high video sensor realizes fault detection of local discharge, avoids the interference of corona discharge in air, detection efficiency
It is high.
Preferably, described ultrasonic wave positioning mode is：Laid in the region of discharge 2. obtained by described step
Ultrasonic sensor, mesh generation is carried out using the gridding method gas chamber shell bigger than normal to ultrasonic signal, each grid is carried out
The ultrasonic signal strength that discharges is detected, and the electric discharge ultrasonic signal strength maximum point measured is positioned as into specific point of discharge.Using
Ultrasonic sensor is detected, and overcomes electromagnetic interference influence, and signal attenuation is fast, can be accurately positioned point of discharge.
Preferably, two described extra-high video sensors are arranged on GIS both ends, the high frequency of two extra-high video sensors
Response characteristic is identical, and the connection signal line length between described high-speed oscilloscope and two extra-high video sensors is also identical.
The beneficial effects of the invention are as follows：Discharge source is combined with reference to superfrequency detection technique and ultrasonic detection technology
Positioning, can quickly and accurately position the point of discharge in GIS, be easy to carry out relevant treatment early, developed into so as to be reduced or avoided
Equipment fault, improve GIS operational reliability.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of extra-high video sensor and discharge source position relationship in GIS of the present invention.
Fig. 2 is a kind of mesh generation schematic diagram of gridding method in the present invention.
61. extra-high video sensor in figure, 62. discharge sources, 63. grids, 64. disconnecting switch and earthed switch, 65. rheologies,
66. disc insulator, 67. bucklings, 68. arresters.
Embodiment
Below by embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.
Embodiment：A kind of localization method of electric power GIS Partial Discharge Sources of the present embodiment, comprises the following steps：
1. general survey is carried out to GIS with superfrequency logging, to assay intervals in GIS or the disc insulator in region, interior
Put the extra-high video sensor of formula and carry out general survey, the substantially area of discharge source is primarily determined that according to the wave character and signal intensity that detect
Domain；
2. carrying out positioning using TDOA using superfrequency positioning mode, the smaller region of discharge of discharge source, superfrequency positioning mode are determined
For：Two extra-high video sensors being monitored to ultra-high frequency signal are set in GIS, and two extra-high video sensors are arranged on
GIS both ends, the high frequency response characteristic of two extra-high video sensors is identical, two superfrequencies sensing respectively with high-speed oscilloscope phase
Even, the connection signal line length between high-speed oscilloscope and two extra-high video sensors is identical, with high-speed oscilloscope to two spies
The waveform for the ultra-high frequency signal that high frequency sensors monitor synchronizes record, using the time difference for two waveforms that recorded,
As shown in figure 1, determining the smaller region of discharge of discharge source by calculating, the circular of region of discharge is：
Wherein, L is the distance between two described extra-high video sensors 61, and x is that discharge source 62 is extra-high to one of them
The distance of video sensor, from high-speed oscilloscope obtain two superfrequency Sensor monitorings to two ultra-high frequency signal waveforms when
Between difference be Δ t, c is the equivalent spread speed of electromagnetic wave in GIS, and c value is 3 × 108m/s；
3. determining the particular location of point of discharge in region of discharge using ultrasonic wave positioning mode, ultrasonic wave positioning mode is：
Ultrasonic sensor is laid in the region of discharge 2. obtained by step, uses the gridding method air chamber shell bigger than normal to ultrasonic signal
Body carries out mesh generation, and opposite side, the upper side and lower side in housing also carry out mesh generation, as shown in Fig. 2 housing mid-section point
For disconnecting switch and earthed switch 64, housing left side is disc insulator 66 and rheology 65, is disc insulator 66 on the upside of housing
With buckling 67, housing downside is disc insulator 66 and arrester 68, inserts data at each grid 63, each grid is entered
Row electric discharge ultrasonic signal strength detection, the tool of point of discharge is determined with the diagram of the Processing of Partial Discharge Ultrasonic Signals intensity in grid
Body position, the electric discharge ultrasonic signal strength maximum point measured is positioned as specific point of discharge.
The present invention combines superfrequency detection technique and ultrasonic detection technology and carries out alignment by union to discharge source, can it is quick,
The point of discharge in GIS is positioned exactly, is easy to carry out relevant treatment early, is developed into equipment fault so as to be reduced or avoided, carry
High GIS operational reliability.
Claims (5)
1. a kind of localization method of electric power GIS Partial Discharge Sources, it is characterised in that comprise the following steps：
1. carrying out general survey to GIS with superfrequency logging, electric discharge is primarily determined that according to the wave character and signal intensity that detect
The approximate region in source；
2. carrying out positioning using TDOA using superfrequency positioning mode, the smaller region of discharge of discharge source is determined；
3. the particular location of point of discharge is determined in described region of discharge using ultrasonic wave positioning mode.
2. the localization method of a kind of electric power GIS Partial Discharge Sources according to claim 1, it is characterised in that described is extra-high
Frequency positioning mode is：Two extra-high video sensors being monitored to ultra-high frequency signal are set in GIS, with high-speed oscilloscope to two
Individual superfrequency Sensor monitoring to the waveform of ultra-high frequency signal synchronize record, utilize the time for two waveforms that recorded
Difference, the smaller region of discharge of discharge source is determined by calculating.
A kind of 3. localization method of electric power GIS Partial Discharge Sources according to claim 2, it is characterised in that described electric discharge
The circular in region is：
Wherein, L is the distance between two described extra-high video sensors, and x is discharge source to one of them extra-high video sensor
Distance, from described high-speed oscilloscope obtain two superfrequency Sensor monitorings to two ultra-high frequency signal waveforms time
Difference is Δ t, and c is the equivalent spread speed of electromagnetic wave in GIS, and c value is 3 × 108m/s。
A kind of 4. localization method of electric power GIS Partial Discharge Sources according to claim 1, it is characterised in that described ultrasound
Ripple positioning mode is：Ultrasonic sensor is laid in the region of discharge 2. obtained by described step, using gridding method to super
Acoustic signals gas chamber shell bigger than normal carries out mesh generation, carries out ultrasonic signal strength detection of discharging to each grid, will survey
The electric discharge ultrasonic signal strength maximum point obtained is positioned as specific point of discharge.
5. the localization method of a kind of electric power GIS Partial Discharge Sources according to Claims 2 or 3, it is characterised in that described
Two extra-high video sensors are arranged on GIS both ends, and the high frequency response characteristic of two extra-high video sensors is identical, described high speed
Connection signal line length between oscillograph and two extra-high video sensors is also identical.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116201A (en) * | 2018-09-07 | 2019-01-01 | 国网宁夏电力有限公司电力科学研究院 | A kind of localization method and system of local discharge of electrical equipment |
| CN110082653A (en) * | 2019-05-08 | 2019-08-02 | 广东锦煜智能科技有限公司 | A kind of partial discharge monitoring system and equipment |
| CN110208667A (en) * | 2019-07-10 | 2019-09-06 | 江苏利得智能监测科技有限公司 | GIS equipment partial discharge localization method based on time switch technology |
| CN110261741A (en) * | 2019-05-24 | 2019-09-20 | 国网河北省电力有限公司电力科学研究院 | Discharge position localization method, device and the terminal device of high-tension switch gear |
| CN110514970A (en) * | 2019-09-03 | 2019-11-29 | 国网湖南省电力有限公司 | A kind of GIS partial discharge source localization method, system and medium based on data-driven |
| CN112904158A (en) * | 2021-01-20 | 2021-06-04 | 云南电网有限责任公司电力科学研究院 | Acoustic-electric joint detection method for determining partial discharge position in GIS |
| CN113917281A (en) * | 2021-09-29 | 2022-01-11 | 国网山东省电力公司电力科学研究院 | Overhead line partial discharge live detection system and method |
| CN114509651A (en) * | 2022-04-15 | 2022-05-17 | 湖北工业大学 | GIS partial discharge external ultrasonic and ultrahigh frequency integrated sensor and detection method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116201A (en) * | 2018-09-07 | 2019-01-01 | 国网宁夏电力有限公司电力科学研究院 | A kind of localization method and system of local discharge of electrical equipment |
| CN110082653A (en) * | 2019-05-08 | 2019-08-02 | 广东锦煜智能科技有限公司 | A kind of partial discharge monitoring system and equipment |
| CN110261741A (en) * | 2019-05-24 | 2019-09-20 | 国网河北省电力有限公司电力科学研究院 | Discharge position localization method, device and the terminal device of high-tension switch gear |
| CN110208667A (en) * | 2019-07-10 | 2019-09-06 | 江苏利得智能监测科技有限公司 | GIS equipment partial discharge localization method based on time switch technology |
| CN110514970A (en) * | 2019-09-03 | 2019-11-29 | 国网湖南省电力有限公司 | A kind of GIS partial discharge source localization method, system and medium based on data-driven |
| CN110514970B (en) * | 2019-09-03 | 2021-11-19 | 国网湖南省电力有限公司 | GIS partial discharge source positioning method, system and medium based on data driving |
| CN112904158A (en) * | 2021-01-20 | 2021-06-04 | 云南电网有限责任公司电力科学研究院 | Acoustic-electric joint detection method for determining partial discharge position in GIS |
| CN113917281A (en) * | 2021-09-29 | 2022-01-11 | 国网山东省电力公司电力科学研究院 | Overhead line partial discharge live detection system and method |
| CN114509651A (en) * | 2022-04-15 | 2022-05-17 | 湖北工业大学 | GIS partial discharge external ultrasonic and ultrahigh frequency integrated sensor and detection method |
| CN114509651B (en) * | 2022-04-15 | 2022-07-19 | 湖北工业大学 | GIS partial discharge external ultrasonic and ultrahigh frequency integrated sensor and detection method |
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Application publication date: 20180209 |