CN104198902A - Method for improving local discharge ultrahigh frequency detection effect of 110kV cable joint - Google Patents
Method for improving local discharge ultrahigh frequency detection effect of 110kV cable joint Download PDFInfo
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- CN104198902A CN104198902A CN201410412717.7A CN201410412717A CN104198902A CN 104198902 A CN104198902 A CN 104198902A CN 201410412717 A CN201410412717 A CN 201410412717A CN 104198902 A CN104198902 A CN 104198902A
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Abstract
Disclosed is a method for improving a local discharge ultrahigh frequency detection effect of a 110kV cable joint. Firstly, a three-dimensional simulation model of the cable joint is established by means of a high frequency structure simulator (HFSS), strength and distribution characteristics of ultrahigh frequency signals which are radiated from disconnecting positions of a shielding layer are analyzed when local discharge occurs in the cable joint, feasibility of usage of an external sensor is verified, and the optimal sensor arranging position with the strongest signal can be obtained. Then according to a microstrip patch antenna theory, an external sensor ultrahigh frequency sensor is manufactured for field detection. Finally, the ultrahigh frequency sensor is used for performing field detection analysis, and a simulation result is verified. The method for improving the local discharge ultrahigh frequency detection effect of the 110kV cable joint has the advantages of convenient operation, high detection accuracy and wide application range.
Description
Technical field
The present invention relates to power information technical field, particularly, relate to a kind of method that improves 110kV cable splice local discharge superhigh frequency detection effect by HFSS Electromagnetic Simulation.
Background technology
Crosslinked polyethylene (be called for short XLPE) power cable with its superior electric property, lay easily, operation maintenance is simple etc., and advantage is widely used in the transmission line of electricity of each electric pressure of electric system.But along with the growth of working time, the electric power accident that XLPE cable and joint thereof cause constantly increases, cable intermediate joint weak link and the typical operation troubles position of high-voltage cable insulating especially wherein.Therefore, the insulating property of cable intermediate joint have been subject to paying close attention to.Along with the successful Application of local discharge superhigh frequency detection method on power transformer and GIS, the insulating property of intermediate joint of electric cable detect and adopt more and more the method.Ultrahigh frequency detection method sensor used has external and built-in two kinds.Built-in sensor need to be inserted sensor in cable intermediate joint, and this need to install realization when cabling, and is difficult to implement for the cable having put into operation.And sensor is inserted in cable intermediate joint, the Electric Field Distribution of cable intermediate joint can be affected, if the improper cable intermediate joint that can make on the contrary in installation site breaks down.Hence one can see that, and built-in sensor rig-site utilization has significant limitation.
Therefore, necessary employing has more the external sensor of general applicability.And for the use of external sensor, because the screen layer of the cross interconnected cable intermediate joint of three-phase disconnects, so electromagnetic signal may be radiated by external sensor and be received by screen layer gap.But when ultra-high frequency signal is propagated in air, rapidly, the size that sensor riding position difference receives signal has a great difference in decay.If sensor riding position is not good, can, because of the aerial attenuation of signal, can't detect signal or signal gets too small, the easy like this error detection that causes.Therefore, how according to the design feature of cable intermediate joint and Characteristics of Partial Discharge, the characteristic distributions of the electromagnetic field signal that joint external radiation goes out is described, determine and be applicable to the strength of joint external signal that sensor lays, improving and detect effect, is to need at present the problem of solution.
Summary of the invention
For overcoming the defect of art methods, the object of the present invention is to provide a kind of method that improves 110kV cable intermediate joint local discharge superhigh frequency detection effect by HFSS Electromagnetic Simulation, the method can help to determine and be applicable to the position that external sensor is laid, well improve cable intermediate joint local discharge superhigh frequency and detected effect.
For achieving the above object, the invention provides a kind of method that the 110kV of raising cable splice local discharge superhigh frequency detects effect, comprise the following steps:
Step 1: utilize three-dimensional structure electromagnetic field simulation software HFSS to carry out modeling, carry out the drafting of three-dimensional picture by the cable found and the specification of intermediate head thereof, build cable intermediate joint three-dimensional simulation model;
Step 2: the material characteristic parameter that model is set;
Step 3: carry out the interpolation of driving source, the setting of the setting of grid, electromagnetic field preservation and the setting of surveying line;
Step 4: until step 3 and after step is carried out completely before, carry out validity check, guarantee that all check results are all correct, then analyze all, move realistic model;
Step 5: after simulation run finishes, observe Electric Field Distribution situation, Distribution of Magnetic Field situation by field pattern; By changing the set of time under built-in variable, observe the distribution situation under different time, by the growth of time, observe electromagnetic field and whether can radiate by cable intermediate joint screen layer gap; "Yes" carry out step 6 if, and "No" carry out step 7 if;
Step 6: under result, report by generating electric field and Distribution of Magnetic Field, observe the time domain curve of field distribution of surveying on line, the time dependent characteristic of comparative analysis signal amplitude size, finds the position that signal is the strongest;
Step 7: theoretical according to micro-strip paster antenna, make external uhf sensor;
Step 8: the sensor of utilize making carries out field measurement, if the result of step 5 is "Yes", sensor is placed on the best riding position that obtains and position around, then measured data is carried out numeric ratio and is analyzed; If the result of step 5 is "No", near sensor is placed on outside cable splice, observe the data that measure;
Step 9: analyze by measured data, contrast actual measurement and simulation result, obtain being applicable to the optimum position that external sensor is laid.
The method that detects effect according to the raising 110kV cable splice local discharge superhigh frequency described in preferred embodiment of the present invention, step 2 specifically comprises the material characteristic parameter that metal joint sleeve, rubber stress cone and silicon rubber major insulation are set.
According to the raising 110kV cable splice local discharge superhigh frequency described in preferred embodiment of the present invention, detect the method for effect, material characteristic parameter described in step 2 comprises relative dielectric constant and relative permeability, wherein, metal joint sleeve is set to copper, and relative dielectric constant is 1, relative permeability is 0.99991; Rubber stress cone is set to rubber, and relative dielectric constant is that 2.4-3.7, relative permeability are 1; Silicon rubber major insulation is set to silicon rubber, and relative dielectric constant is that 3.2-9.8, relative permeability are 1.
The method that detects effect according to the raising 110kV cable intermediate joint local discharge superhigh frequency described in preferred embodiment of the present invention, described step 3 further comprises:
On XLPE insulation and intermediate head inner silicone interface, add driving source, and driving source pulse width is set is 1ns, the peak value of pulse is 10mA; Carry out grid setting, be set to limit the mode of greastest element prime number; Choose the structure division that need to preserve electromagnetic field, added list, then preserving a list object that middle interpolation setting is set; The position that needs observation field to change outward at joint, adds and surveys line.
The method that detects effect according to the raising 110kV cable splice local discharge superhigh frequency described in preferred embodiment of the present invention, described step 4 further comprises:
First carry out validity check, while guaranteeing that all check results are all correct, carry out Analyze All and analyze all, if three-dimensional simulation model inspection reports an error, remodify the three-dimensional simulation model of structure.
The method that detects effect according to the raising 110kV cable splice local discharge superhigh frequency described in preferred embodiment of the present invention, described step 6 further comprises:
By generating the generation field distribution of plotting of the lower rectangular coordinate point of field distribution report, report.Wherein solid is selected the detection line that step arranges; By electric field intensity map and the magnetic chart of choosing under observed quantity, obtain respectively time domain Electric Field Distribution curve and the magnetic field profile on difference, by contrasting the amplitude size of several curves under time domain, find that of amplitude maximum wherein, the position of this curve representative is the position that signal is the strongest.
The method that detects effect according to the raising 110kV cable splice local discharge superhigh frequency described in preferred embodiment of the present invention, step 8 is specially:
Utilize the sensor of making to carry out field measurement, if the result of step 5 is "Yes", sensor is placed on the best riding position that obtains and position around, then relatively and analyze, whether checking records signal to the amplitude magnitude numerical value that best riding position place and position obtains measured data is recorded to signal around at best riding position place stronger than the signal that around position obtains; If the result of step 5 is "No", near sensor is placed on outside cable splice, observe the data that measure;
The method that detects effect according to the raising 110kV cable splice local discharge superhigh frequency described in preferred embodiment of the present invention, step 9 is specially:
If the result of step 5 is "Yes", verify that whether the strength of the signal that obtains in emulation is consistent with field measurement, the signal recording, than other position signalling amplitudes are large, after checking is consistent, obtains being applicable to the optimum position that external sensor is laid around; If the result of step 5 is "No", answer verificating sensor to be placed on cable splice and do not detect Partial discharge signal outward, the emulation conclusion while being "No", electromagnetic field cannot radiate by cable intermediate joint screen layer gap.
The present invention improves 110kV cable splice local discharge superhigh frequency by HFSS Electromagnetic Simulation and detects effect, can help to determine to be applicable to the position that external sensor is laid, and has well improved cable intermediate joint local discharge superhigh frequency and has detected effect.Compared with prior art, the present invention has following beneficial effect:
The first, the present invention can help judgement in cable intermediate joint Partial Discharge Detection, adopts the feasibility of external sensor, make to detect the limitation that not brought by built-in sensor, overcome the limitation of built-in sensor rig-site utilization, easy to operate, applied widely.
The second, the present invention has obtained the best riding position of external sensor, has effectively reduced impact ultra-high frequency signal attenuation being brought measurement because of air, has greatly improved the accuracy of testing result.
The 3rd, the present invention realizes simply, accuracy of detection is high, is easy to apply in Practical Project.
Accompanying drawing explanation
Fig. 1 is that the present invention improves the process flow diagram that 110kV cable splice local discharge superhigh frequency detects the method for effect;
Fig. 2 is the three-dimensional simulation model figure that the embodiment of the present invention one utilizes HFSS to build;
Fig. 3 for adding driving source and the position view of surveying line in the three-dimensional simulation model of Fig. 2;
Fig. 4 is the Gauss pulse function type excitation waveform figure of the embodiment of the present invention one;
Fig. 5 is three-dimensional simulation model distribution map of the electric field during t=1000ps in embodiment mono-;
Fig. 6 is three-dimensional simulation model Distribution of Magnetic Field figure during t=1000ps in embodiment mono-;
Fig. 7 is three-dimensional simulation model distribution map of the electric field during t=2000ps in embodiment mono-;
Fig. 8 is three-dimensional simulation model Distribution of Magnetic Field figure during t=2000ps in embodiment mono-;
Fig. 9 is electric field change curve in embodiment mono-;
Figure 10 is changes of magnetic field curve in embodiment mono-.
Embodiment
Below with reference to accompanying drawing of the present invention; technical scheme in the embodiment of the present invention is carried out to clear, complete description and discussion; obviously; as described herein is only a part of example of the present invention; it is not whole examples; embodiment based in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to protection scope of the present invention.
For the ease of the understanding to the embodiment of the present invention, below in conjunction with accompanying drawing, take specific embodiment and be further explained as example, and each embodiment does not form the restriction to the embodiment of the present invention.
Inventive concept of the present invention is: first, utilize high-frequency structure emulator HFSS to set up the three-dimensional simulation model of cable splice, analyzed when the inner generation of cable splice shelf depreciation, the intensity that ultra-high frequency signal radiates by screen layer gap and characteristic distributions thereof, verify the feasibility that adopts external sensor, obtained the strongest best riding position of sensor of signal.Then, theoretical according to micro-strip paster antenna, made external uhf sensor, for Site Detection.Finally, utilize the uhf sensor of development to carry out field measurement analysis, checking simulation result.
Improve the method that 110kV cable splice local discharge superhigh frequency detects effect, comprise the following steps:
Step 1: utilize three-dimensional structure electromagnetic field simulation software HFSS to carry out modeling, carry out the drafting of three-dimensional picture by the cable found and the specification of intermediate head thereof, build cable intermediate joint three-dimensional simulation model.
General cable core is comprised of copper conductor, interior outer semiconducting layer, insulation, protective metal shell, and cable intermediate joint mainly comprises metal joint sleeve, semi-conductive screen, rubber stress cone, silicon rubber major insulation etc.As shown in Figure 2, the cable intermediate joint three-dimensional simulation model that the present invention builds comprises metal joint sleeve 1, rubber stress cone 2 and silicon rubber major insulation 3, metal joint sleeve 1 is arranged in silicon rubber major insulation 3 and two ends are connected with cable core respectively, and stress cone 2 is connected to silicon rubber major insulation 3 two ends.
Step 2: the material characteristic parameter that model is set.
The material of using has air, aluminium, copper, PVC, XLPE, silicon rubber etc.The parameter arranging has relative dielectric constant, relative permeability etc.
Particularly, comprise the material characteristic parameter that metal joint sleeve, rubber stress cone and silicon rubber major insulation are set.Material characteristic parameter comprises relative dielectric constant and relative permeability, and wherein, metal joint sleeve is set to copper, and relative dielectric constant is 1, relative permeability is 0.99991; Rubber stress cone is set to rubber, and relative dielectric constant span is 2.4-3.7, and relative permeability is 1; Silicon rubber major insulation is set to silicon rubber, and relative dielectric constant span is 3.2-9.8, and relative permeability is 1.
Step 3: carry out the interpolation of driving source, the setting of the setting of grid, electromagnetic field preservation and the setting of surveying line.
Step 4: until step 3 and after step is carried out completely before, carry out validity check, guarantee that all check results are all correct, then analyze all, move realistic model.
First carry out validation check (validity check), while guaranteeing that all check results are all correct, carry out Analyze All (analyzing all), if three-dimensional simulation model inspection reports an error, remodify the three-dimensional simulation model of structure.
Step 5: after simulation run finishes, observe Electric Field Distribution situation, Distribution of Magnetic Field situation by Field Overlays (field pattern); By changing the set of time under intrinsic variables (built-in variable), observe the distribution situation under different time, by the growth of time, observe electromagnetic field and whether can radiate by cable intermediate joint screen layer gap; "Yes" carry out step 6 if, and "No" carry out step 7 if.
Step 6: under results (result), report by generating electric field and Distribution of Magnetic Field, observe the time domain curve of field distribution of surveying on line, the time dependent characteristic of comparative analysis signal amplitude size, finds the position that signal is the strongest.
By the rectangular plot (rectangular coordinate point plots) under create fields report (generating field distribution report), generate field distribution report.Wherein geometry (solid) selects the detection line that step arranges; By Mag-E-t (electric field intensity map) and the Mag-H-t (magnetic chart) choosing under quantity (observed quantity), obtain respectively time domain Electric Field Distribution curve and the magnetic field profile on difference, by contrasting the amplitude size of several curves under time domain, find that of amplitude maximum wherein, the position of this curve representative is the position that signal is the strongest.
Step 7: theoretical according to micro-strip paster antenna, make external uhf sensor.
Step 8: the sensor of utilize making carries out field measurement, if the result of step 5 is "Yes", sensor is placed on the best riding position (being the position that signal is the strongest) that obtains and position around, then measured data is carried out numeric ratio and is analyzed; If the result of step 5 is "No", near sensor is placed on outside cable splice, observe the data that measure.
Utilize the sensor of making to carry out field measurement, if the result of step 5 is "Yes", sensor is placed on the best riding position that obtains and position around, then relatively and analyze, whether checking records signal to the amplitude magnitude numerical value that best riding position place and position obtains measured data is recorded to signal around at best riding position place stronger than the signal that around position obtains; If the result of step 5 is "No", near sensor is placed on outside cable splice, observe the data that measure.
Step 9: analyze by measured data, contrast actual measurement and simulation result, obtain being applicable to the optimum position that external sensor is laid.
If the result of step 5 is "Yes", verify that whether the strength of the signal that obtains in emulation is consistent with field measurement, the signal recording, than other position signalling amplitudes are large, after checking is consistent, obtains being applicable to the optimum position that external sensor is laid around; If the result of step 5 is "No", answer verificating sensor to be placed on cable splice and do not detect Partial discharge signal outward, the emulation conclusion while being "No", electromagnetic field cannot radiate by cable intermediate joint screen layer gap.
Below in conjunction with specific embodiment, the present invention is further described.
Embodiment mono-
The cable intermediate joint that domestic certain cable factory produces of take is example, a kind ofly improves the method that 110kV cable splice local discharge superhigh frequency detects effect, comprises the following steps:
Step 1: utilize three-dimensional structure electromagnetic field simulation software HFSS to carry out modeling, carry out the drafting of three-dimensional picture by the cable found and the specification of intermediate head thereof, build cable intermediate joint three-dimensional simulation model.
The three-dimensional simulation model of structure as shown in Figure 2, three-dimensional simulation model comprises metal joint sleeve 1, rubber stress cone 2 and silicon rubber major insulation 3, metal joint sleeve 1 is arranged in silicon rubber major insulation 3 and two ends are connected with cable core respectively, and stress cone 2 is connected to silicon rubber major insulation 3 two ends.
Step 2: the material characteristic parameter that model is set.
In the present embodiment, metal joint sleeve is set to copper, and relative dielectric constant is 1, relative permeability is 0.99991; Rubber stress cone is set to rubber, and relative dielectric constant is 3, relative permeability is 1; Silicon rubber major insulation is set to silicon rubber, and relative dielectric constant is 7, and relative permeability is 1.
Step 3: carry out the interpolation of driving source, the setting of the setting of grid, electromagnetic field preservation and the setting of surveying line.
As shown in Figure 3, on XLPE insulation and intermediate head inner silicone interface, add driving source 4, and driving source pulse width is set is 1ns, the peak value of pulse is 10mA; Carry out grid setting, be set to limit the mode of greastest element prime number; Choose the structure division that need to preserve electromagnetic field, added list (list), then preserving an objectlist (list object) that middle interpolation setting is set; The position that needs observation field to change outward at joint, adds and surveys line 5.Particularly, driving source is the excitation of pulse Gaussian function type, and the oscillogram of excitation as shown in Figure 4.
Step 4: until step 3 and after step is carried out completely before, carry out validity check, guarantee that all check results are all correct, then analyze all, move realistic model.
First carry out validation check (validity check), while guaranteeing that all check results are all correct, carry out Analyze All (analyzing all), if three-dimensional simulation model inspection reports an error, remodify the three-dimensional simulation model of structure.
Step 5: after simulation run finishes, observe Electric Field Distribution situation, Distribution of Magnetic Field situation by Field Overlays (field pattern); By changing the set of time under intrinsic variables (built-in variable), observe the distribution situation under different time, by the growth of time, observe electromagnetic field and whether can radiate by cable intermediate joint screen layer gap; "Yes" carry out step 6 if, and "No" carry out step 7 if.
Emulation finishes in rear step 5, when t equals 1000ps, in cable splice and distribution map of the electric field around as Fig. 5, Distribution of Magnetic Field figure is as Fig. 6.The electromagnetic field that visible now driving source excites has just started to propagate, and does not propagate into outside cable splice, and near electromagnetic field joint underexcitation source is larger.When t equals 2000ps, in cable splice and distribution map of the electric field around as Fig. 7, Distribution of Magnetic Field figure is as Fig. 8.Now electromagnetic field is radiated outside cable splice by metal level gap.
Step 6: under results (result), report by generating electric field and Distribution of Magnetic Field, observe the time domain curve of field distribution of surveying on line, the time dependent characteristic of comparative analysis signal amplitude size, finds the position that signal is the strongest.
By the rectangular plot (rectangular coordinate point plots) under create fields report (generating field distribution report), generate field distribution report.Wherein geometry (solid) selects the detection line that step arranges; By Mag-E-t (electric field intensity map) and the Mag-H-t (magnetic chart) choosing under quantity (observed quantity), obtain respectively time domain Electric Field Distribution curve and the magnetic field profile on difference, by contrasting the amplitude size of several curves under time domain, find that of amplitude maximum wherein, the position of this curve representative is the position that signal is the strongest.
The detection line arranging by step 3, can obtain the electromagnetic field change curve at diverse location place on this line.When arranging, get uniform 5 points on this line, the electric field obtaining, changes of magnetic field curve are respectively as Fig. 9 and Figure 10.As seen from the figure, the point that the dashed curve of normalized Distance=0 represents is all stronger than the electric field of other positions, Distribution of Magnetic Field, is desirable sensor riding position.By the normalized Distance=0 wherein showing, known this position is a side of screen layer gap, close ground wire, surveys the most left place of line.
Step 7: theoretical according to micro-strip paster antenna, make external uhf sensor.
Step 8: the sensor of utilize making carries out field measurement, if the result of step 5 is "Yes", sensor is placed on the best riding position (being the position that signal is the strongest) that obtains and position around, then measured data is carried out numeric ratio and is analyzed; If the result of step 5 is "No", near sensor is placed on outside cable splice, observe the data that measure.
Carry out field measurement.Data acquisition is carried out in the desirable installation site that installation of sensors is obtained in step 6, and the peak-to-peak value of the Partial discharge signal recording is 53.8mV; Then data acquisition is carried out in mobile uhf sensor to other positions around, and the Partial discharge signal recording is all than a little less than before movement, and being fixed on the peak-to-peak value that a place records is 26.9mV.
Step 9: analyze by measured data, contrast actual measurement and simulation result, obtain being applicable to the optimum position that external sensor is laid.
Contrast actual measurement and simulation result, the best riding position obtaining by this kind of method is stronger than the signal that around other positions record, and has improved cable intermediate joint local discharge superhigh frequency and has detected effect.
Disclosed is above only several specific embodiment of the present invention, but the present invention is not limited thereto, and the changes that any person skilled in the art can think of, all should drop in protection scope of the present invention.
Claims (8)
1. improve the method that 110kV cable splice local discharge superhigh frequency detects effect, it is characterized in that, comprise the following steps:
Step 1: utilize three-dimensional structure electromagnetic field simulation software HFSS to carry out modeling, carry out the drafting of three-dimensional picture by the cable found and the specification of intermediate head thereof, build cable intermediate joint three-dimensional simulation model;
Step 2: the material characteristic parameter that model is set;
Step 3: carry out the interpolation of driving source, the setting of the setting of grid, electromagnetic field preservation and the setting of surveying line;
Step 4: until step 3 and after step is carried out completely before, carry out validity check, guarantee that all check results are all correct, then analyze all, move realistic model;
Step 5: after simulation run finishes, observe Electric Field Distribution situation, Distribution of Magnetic Field situation by field pattern; By changing the set of time under built-in variable, observe the distribution situation under different time, by the growth of time, observe electromagnetic field and whether can radiate by cable intermediate joint screen layer gap; "Yes" carry out step 6 if, and "No" carry out step 7 if;
Step 6: under result, report by generating electric field and Distribution of Magnetic Field, observe the time domain curve of field distribution of surveying on line, the time dependent characteristic of comparative analysis signal amplitude size, finds the position that signal is the strongest;
Step 7: theoretical according to micro-strip paster antenna, make external uhf sensor;
Step 8: the sensor of utilize making carries out field measurement, if the result of step 5 is "Yes", sensor is placed on the best riding position that obtains and position around, then measured data is carried out numeric ratio and is analyzed; If the result of step 5 is "No", near sensor is placed on outside cable splice, observe the data that measure;
Step 9: analyze by measured data, contrast actual measurement and simulation result, obtain being applicable to the optimum position that external sensor is laid.
2. raising 110kV cable splice local discharge superhigh frequency according to claim 1 detects the method for effect, it is characterized in that, step 2 specifically comprises the material characteristic parameter that metal joint sleeve, rubber stress cone and silicon rubber major insulation are set.
3. raising 110kV cable splice local discharge superhigh frequency according to claim 2 detects the method for effect, it is characterized in that, material characteristic parameter described in step 2 comprises relative dielectric constant and relative permeability, wherein, metal joint sleeve is set to copper, and relative dielectric constant is 1, relative permeability is 0.99991; Rubber stress cone is set to rubber, and relative dielectric constant is that 2.4-3.7, relative permeability are 1; Silicon rubber major insulation is set to silicon rubber, and relative dielectric constant is that 3.2-9.8, relative permeability are 1.
4. raising 110kV cable splice local discharge superhigh frequency according to claim 1 detects the method for effect, it is characterized in that, described step 3 further comprises:
On XLPE insulation and intermediate head inner silicone interface, add driving source, and driving source pulse width is set is 1ns, the peak value of pulse is 10mA; Carry out grid setting, be set to limit the mode of greastest element prime number; Choose the structure division that need to preserve electromagnetic field, added list, then preserving a list object that middle interpolation setting is set; The position that needs observation field to change outward at joint, adds and surveys line.
5. raising 110kV cable splice local discharge superhigh frequency according to claim 1 detects the method for effect, it is characterized in that, described step 4 further comprises:
First carry out validity check, while guaranteeing that all check results are all correct, carry out Analyze All and analyze all, if three-dimensional simulation model inspection reports an error, remodify the three-dimensional simulation model of structure.
6. raising 110kV cable splice local discharge superhigh frequency according to claim 1 detects the method for effect, it is characterized in that, described step 6 further comprises:
By generating the generation field distribution of plotting of the lower rectangular coordinate point of field distribution report, report.Wherein solid is selected the detection line that step arranges; By electric field intensity map and the magnetic chart of choosing under observed quantity, obtain respectively time domain Electric Field Distribution curve and the magnetic field profile on difference, by contrasting the amplitude size of several curves under time domain, find that of amplitude maximum wherein, the position of this curve representative is the position that signal is the strongest.
7. raising 110kV cable splice local discharge superhigh frequency according to claim 1 detects the method for effect, it is characterized in that, step 8 is specially:
Utilize the sensor of making to carry out field measurement, if the result of step 5 is "Yes", sensor is placed on the best riding position that obtains and position around, then relatively and analyze, whether checking records signal to the amplitude magnitude numerical value that best riding position place and position obtains measured data is recorded to signal around at best riding position place stronger than the signal that around position obtains; If the result of step 5 is "No", near sensor is placed on outside cable splice, observe the data that measure.
8. raising 110kV cable splice local discharge superhigh frequency according to claim 1 detects the method for effect, it is characterized in that, step 9 is specially:
If the result of step 5 is "Yes", verify that whether the strength of the signal that obtains in emulation is consistent with field measurement, the signal recording, than other position signalling amplitudes are large, after checking is consistent, obtains being applicable to the optimum position that external sensor is laid around; If the result of step 5 is "No", answer verificating sensor to be placed on cable splice and do not detect Partial discharge signal outward, the emulation conclusion while being "No", electromagnetic field cannot radiate by cable intermediate joint screen layer gap.
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| CN107831408A (en) * | 2017-09-15 | 2018-03-23 | 河北省电力建设调整试验所 | A kind of universal design of ultra high-frequency partial discharge sensor, optimization and method of testing |
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| CN114114960A (en) * | 2022-01-06 | 2022-03-01 | 国网辽宁省电力有限公司沈阳供电公司 | Solid-oil mixture type high-voltage cable-GIS terminal internal discharge high-frequency electromagnetic field distribution characteristic simulation method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040263179A1 (en) * | 1998-10-16 | 2004-12-30 | Nezar Ahmed | On-line detection of partial discharge in electrical power systems |
| CN102707211A (en) * | 2012-07-03 | 2012-10-03 | 广州供电局有限公司 | Method and system for simulating ultrahigh-frequency radiation characteristic of cable straight joint |
| CN102721909A (en) * | 2012-07-03 | 2012-10-10 | 广州供电局有限公司 | Ultrahigh frequency radiation characteristic simulation method and system for cable body |
| CN103149507A (en) * | 2013-01-30 | 2013-06-12 | 西安电子科技大学 | Externally arranged ultrahigh frequency partial discharge detection sensor |
-
2014
- 2014-08-20 CN CN201410412717.7A patent/CN104198902A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040263179A1 (en) * | 1998-10-16 | 2004-12-30 | Nezar Ahmed | On-line detection of partial discharge in electrical power systems |
| CN102707211A (en) * | 2012-07-03 | 2012-10-03 | 广州供电局有限公司 | Method and system for simulating ultrahigh-frequency radiation characteristic of cable straight joint |
| CN102721909A (en) * | 2012-07-03 | 2012-10-10 | 广州供电局有限公司 | Ultrahigh frequency radiation characteristic simulation method and system for cable body |
| CN103149507A (en) * | 2013-01-30 | 2013-06-12 | 西安电子科技大学 | Externally arranged ultrahigh frequency partial discharge detection sensor |
Non-Patent Citations (2)
| Title |
|---|
| 付婷婷: "电缆附件局部放电监测超高频传感器电磁特性仿真及设计", 《中国优秀硕士学位论文全文数据库 信息科技II辑》 * |
| 付婷婷等: "电缆局放超高频传感器的应用与传播特性仿真", 《传感器与微系统》 * |
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| CN105319524A (en) * | 2015-11-16 | 2016-02-10 | 国家电网公司 | A high tension switchgear partial discharge live detection effectiveness judgment method |
| CN106950477A (en) * | 2017-04-07 | 2017-07-14 | 浙江新图维电子科技有限公司 | A kind of built-in very high frequency(VHF) partial discharge detection device and method |
| CN107831408A (en) * | 2017-09-15 | 2018-03-23 | 河北省电力建设调整试验所 | A kind of universal design of ultra high-frequency partial discharge sensor, optimization and method of testing |
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| CN114114960A (en) * | 2022-01-06 | 2022-03-01 | 国网辽宁省电力有限公司沈阳供电公司 | Solid-oil mixture type high-voltage cable-GIS terminal internal discharge high-frequency electromagnetic field distribution characteristic simulation method |
| CN114114960B (en) * | 2022-01-06 | 2024-04-09 | 国网辽宁省电力有限公司沈阳供电公司 | Solid-oil mixed high-voltage cable-GIS terminal internal discharge high-frequency electromagnetic field distribution characteristic simulation method |
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