CN103123381A - Cable wire system for high voltage cable oscillation wave partial discharge detection system - Google Patents
Cable wire system for high voltage cable oscillation wave partial discharge detection system Download PDFInfo
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- CN103123381A CN103123381A CN2012105903640A CN201210590364A CN103123381A CN 103123381 A CN103123381 A CN 103123381A CN 2012105903640 A CN2012105903640 A CN 2012105903640A CN 201210590364 A CN201210590364 A CN 201210590364A CN 103123381 A CN103123381 A CN 103123381A
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Abstract
The cable wire system for high voltage cable oscillation wave partial discharge detection system comprises a side connection mechanism of units under test, a side connection mechanism of solid switches and high voltage connecting lines, wherein the side connection mechanism of units under test includes a connecting piece of units under test and a first cable connector and the connecting piece of units under test is connected with the units under test. The side connection mechanism of solid switches includes a solid switch connecting piece and a second cable connector and the solid switch connecting piece is connected with the solid switch. The two ends of high voltage connecting line are respectively connected with the first cable connector of the side connection mechanism of units under test and the second cable connector of the side connection mechanism of solid switches. The system is simple in structure. Further, the cable wire system is not easy to generate corona and to discharge through the design which the cable wire part has a large distance from cable oscillation wave testing device, so that the system is stable and reliable in connection, capable of no partial discharge and beneficial to site test.
Description
Technical field
The present invention relates to cable outlet structure in a kind of 10kv wave of oscillation system, specifically a kind of cable outlet system for high-tension cable oscillation wave partial discharge detection system, belong to cable oscillation wave partial discharge detection technique field.
Background technology
The detection method of cable local discharge mainly contains following three kinds: 1, under power-frequency voltage, cable local discharge detects; 2, under Ultra-low Frenquency Voltage, cable local discharge detects; 3, under the DC Damping oscillating voltage, cable local discharge detects; Method 1 wherein, because the electric capacity of power cable is large, be difficult to carry out at the scene the Partial Discharge Detection under power-frequency voltage; Method 2 wherein requires test period long, larger to the cable insulation damage, can cause the new defect in cable; Method 3 wherein, due to XLPE(crosslinked polyethylene, crosslinked polyethylene) insulation resistance of power cable is higher, and under AC and DC, the voltage difference in distribution is larger, after carrying out DC voltage withstand test, in XLPE cable, particularly residual a large amount of space charges are understood at the electric cable stoppage place, after cable puts into operation, these space charges often cause the dielectric breakdown accident of cable.Therefore said method all is not suitable for the Partial Discharge Detection to the extrusion molding power cable.
Wave of oscillation test macro (OWTS, English full name is Oscillating Waveform Test System), utilize the series resonance principle of cable equivalent capacitance and inductance insulated conductor, make oscillating voltage electric cable stoppage place in repeatedly reversal process can inspire local discharge signal, thereby measure the quality of this signal judgement cable by high-frequency coupler.Adopt OWTS wave of oscillation cable local discharge to detect and location technology is tested the 10kV distribution cable, detection and diagnosing latency shelf depreciation defect and can not damaging cable, can improve power supply reliability greatly in time.Chinese patent literature CN102565637A discloses a kind of cable oscillation wave partial discharge detection system of measuring based on asynchronous double-end, specifically shown in Figure 1, this system comprises cable under test and the wave of oscillation generating means and the signals collecting subsystem that connect respectively at cable under test, program control wide journey shelf depreciation prover, host computer.Wherein, wave of oscillation generating means produces damp oscillatory wave under the control of host computer, the signals collecting subsystem at cable two ends is transferred to upper computer analyzing software by the waveform that collects and data and is focused on, analyzes, obtain having or not shelf depreciation to occur and the judgement of partial discharge quantity, thereby realize the test of cable local discharge.
Cable oscillation wave partial discharge detection system belongs to a kind of form of offline inspection, when using cable wave of oscillation detection system detection streamer shelf depreciation situation, the general employing passed through clamp, the mode that screw even welds is connected the cable outgoing line part with cable wave of oscillation checkout equipment, what have even uses insulating tape to be fixed and to realize insulation in cable outlet part and cable wave of oscillation checkout equipment junction, this mode is very coarse, the cable outlet part is connected near distance with cable wave of oscillation checkout equipment, field intensity is more concentrated, easily cause corona, electric discharge, can cause and puncture when serious, and it is not fixing firm, connect unstable, very inconvenient when installation and removal, and very easily cable is caused to unnecessary injury.The most important thing is, adopt existing connected mode, can cause when the shelf depreciation situation with cable wave of oscillation detection system detection streamer, because cable outlet part and cable wave of oscillation checkout equipment are fixing insecure, shelf depreciation partly occurs at cable outlet, and cause the result of detection inaccurate.In order to address the above problem, the present invention proposes a kind of cable outlet structure, that the present invention designs is small and exquisite, without shelf depreciation and be easy to cable is connected with cable oscillation wave partial discharge checkout equipment, can improve the accuracy of cable oscillation wave partial discharge detection system.
Summary of the invention
Technical matters to be solved by this invention is that in prior art, existing connected mode cable outlet part is connected with the cable wave of oscillation checkout equipment technical matters that near distance easily causes corona, electric discharge, thereby a kind of safe and reliable cable outlet system for high-tension cable oscillation wave partial discharge detection system is provided.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of cable outlet system for high-tension cable oscillation wave partial discharge detection system, comprise,
UUT side bindiny mechanism, comprise UUT web member and the first cable web member, and described UUT web member is connected with UUT;
Solid switch side bindiny mechanism, comprise solid switch web member and the second cable web member, and described solid switch web member is connected with solid switch;
The high-tension cable connecting line, its two ends are connected with the described second cable web member of described solid switch side bindiny mechanism with the described first cable web member of described UUT side bindiny mechanism respectively.
The described cable outlet system for high-tension cable oscillation wave partial discharge detection system, described UUT web member is hook, described the first cable web member is the UUT lateral electrode; The articulated end of described hook is affiliated on described UUT, and the stiff end of described hook is connected with the first end of described UUT lateral electrode, and the second end of described UUT lateral electrode is connected with described high-tension cable connecting line.
The described cable outlet system for high-tension cable oscillation wave partial discharge detection system, the first end of the stiff end of described hook and described UUT lateral electrode is fixed by screw.
The described cable outlet system for high-tension cable oscillation wave partial discharge detection system, described the second cable web member is the cable lateral electrode, described solid switch web member is described solid switch lateral electrode, the first end of described cable lateral electrode is connected with described high-tension cable connecting line, the second end of described cable lateral electrode is connected with the first end of described solid switch lateral electrode, and the second end of described solid switch lateral electrode is connected with described solid switch.
The described cable outlet system for high-tension cable oscillation wave partial discharge detection system, the second end of described cable lateral electrode and the first end of described solid switch lateral electrode are fixed by screw.
The described cable outlet system for high-tension cable oscillation wave partial discharge detection system, the second end on described UUT lateral electrode and the first end of described cable lateral electrode overlap respectively insulating sleeve are arranged.
The described cable outlet system for high-tension cable oscillation wave partial discharge detection system, copper electrode or silver electrode that described UUT side bindiny mechanism and described solid switch side bindiny mechanism are withstand voltage 60kV, the cable that described high-tension cable connecting line is withstand voltage 100kV and sustained ceiling current 100A.
The described cable outlet system for high-tension cable oscillation wave partial discharge detection system, the corners processing is carried out in the end of described hook, described UUT lateral electrode, described cable lateral electrode and described solid switch lateral electrode.
The described cable outlet system for high-tension cable oscillation wave partial discharge detection system, the length of described UUT lateral electrode and described cable lateral electrode is not less than 50mm, and external diameter is not less than 20mm.
The described cable outlet system for high-tension cable oscillation wave partial discharge detection system, described UUT lateral electrode is the electrode that structure is identical with described cable lateral electrode.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) the cable outlet system for high-tension cable oscillation wave partial discharge detection system of the present invention, comprise UUT side bindiny mechanism, solid switch side bindiny mechanism and high-tension cable connecting line, wherein, UUT side bindiny mechanism comprises UUT web member and the first cable web member, and described UUT web member is connected with UUT; Solid switch side bindiny mechanism comprises solid switch web member and the second cable web member, and described solid switch web member is connected with solid switch; The two ends of high-tension cable connecting line are connected with the described second cable web member of described solid switch side bindiny mechanism with the described first cable web member of described UUT side bindiny mechanism respectively.Said system is simple in structure, by the high-tension cable connecting line, make the cable outlet part be connected distance with cable wave of oscillation checkout equipment larger, be difficult for producing corona, electric discharge, this system stable connection is reliable, without shelf depreciation, volume is small and exquisite, nothing office puts, is easy to connect, good portability, very favourable to on-the-spot test.
(2) the cable outlet system for high-tension cable oscillation wave partial discharge detection system of the present invention, described UUT web member is hook, hook is demountable parts, this design flexible structure, easily dismounting, hook can be connected on cable or relevant high-tension apparatus very easily simultaneously, and it is firm to connect, without manually carrying out adhesive tape winding and the extra work such as fixing, can significantly improve work efficiency.
(3) the cable outlet system for high-tension cable oscillation wave partial discharge detection system of the present invention, the first end of the stiff end of described hook and described UUT lateral electrode is fixed by screw, the second end of described cable lateral electrode and the first end of described solid switch lateral electrode are fixed by screw, this mode both had been convenient to be fixedly connected with, be convenient to again dismounting, it is firm to connect, and without manually carrying out the adhesive tape winding, can significantly improve work efficiency.
(4) the cable outlet system for high-tension cable oscillation wave partial discharge detection system of the present invention, the second end on described UUT lateral electrode and the first end of described cable lateral electrode overlap respectively insulating sleeve are arranged, for stopping the generation of electric discharge.
(5) the cable outlet system for high-tension cable oscillation wave partial discharge detection system of the present invention, the corners processing is carried out in the end of described hook, described UUT lateral electrode, described cable lateral electrode and described solid switch lateral electrode, reduces the possibility of electric discharge.
(6) the cable outlet system for high-tension cable oscillation wave partial discharge detection system of the present invention, described UUT lateral electrode is the electrode that structure is identical with described cable lateral electrode, actual test is when being connected, without differentiation, improved the versatility of using, be convenient to connect, be simple and easy to use, fool proof.
(7) the cable outlet system for high-tension cable oscillation wave partial discharge detection system of the present invention, the length of described UUT lateral electrode and described cable lateral electrode is not less than 50mm, external diameter is not less than 20mm, and it is firm that this set makes to connect, and reduces electromagnetic interference (EMI).
The accompanying drawing explanation
For content of the present invention is more likely to be clearly understood, below in conjunction with accompanying drawing, the present invention is further detailed explanation, wherein,
Fig. 1 is the structural representation of the cable outlet system for high-tension cable oscillation wave partial discharge detection system of the present invention;
Fig. 2 is the front elevation of solid switch lateral electrode described in the system shown in Fig. 1;
Fig. 3 is the side view of the described solid switch lateral electrode of the system shown in Fig. 1
Fig. 4 is the schematic diagram of described UUT lateral electrode when identical with described cable side electrode structure.
In figure, Reference numeral is expressed as: 1-UUT, 2-UUT side bindiny mechanism, 21-UUT web member, 22-the first cable web member, 3-solid switch side bindiny mechanism, 31-the second cable web member, 32-solid switch web member, 321-solid switch lateral electrode, 4-high-tension cable connecting line, 5-solid switch, 6-round platform ring, the 7-cylindrical rod, 8-round platform, 9-disk.
Embodiment
The structure of a kind of cable outlet system for high-tension cable oscillation wave partial discharge detection system of the present invention as shown in Figure 1, it comprises UUT side bindiny mechanism 2, solid switch side bindiny mechanism 3 and high-tension cable connecting line 4, wherein, UUT side bindiny mechanism 2 comprises UUT web member 21 and the first cable web member 22, and described UUT web member 21 is connected with UUT 1; Solid switch side bindiny mechanism 3 comprises solid switch web member 32 and the second cable web member 31, and described solid switch web member 32 is connected with solid switch 5; The two ends of high-tension cable connecting line 4 are connected with the described second cable web member 31 of described solid switch side bindiny mechanism 3 with the described first cable web member 22 of described UUT side bindiny mechanism 2 respectively, in the present embodiment, the cable that described high-tension cable connecting line 4 is withstand voltage 100kV and sustained ceiling current 100A.
Copper electrode or silver electrode that described UUT side bindiny mechanism 2 and described solid switch side bindiny mechanism 3 are withstand voltage 60kV.In the present embodiment, the copper electrode that described UUT side bindiny mechanism 2 and described solid switch side bindiny mechanism 2 are withstand voltage 60kV, for guaranteeing the generation of corona free.
Described UUT 1 comprises high-tension cable and high-voltage capacitance, and in the present embodiment, described UUT 1 is high-voltage capacitance.
In the present embodiment, described UUT web member 21 is hook, and described the first cable web member 22 is the UUT lateral electrode; The articulated end of described hook is affiliated on described high-voltage capacitance, and the stiff end of described hook is connected with the first end of described UUT lateral electrode, and the second end of described UUT lateral electrode is connected with described high-tension cable connecting line 4.
Described hook is demountable parts, this design flexible structure, easily dismounting, hook can be connected on cable or relevant high-tension apparatus very easily simultaneously, it is firm to connect, without manually carrying out adhesive tape winding and the extra work such as fixing, can significantly improve work efficiency.
The length of described UUT lateral electrode is not less than 50mm, and external diameter is not less than 20mm, specifically requires to determine size with making according to actual needs; In the present embodiment, the length of described UUT lateral electrode is 100mm, and external diameter is 50mm.
In the present embodiment, described UUT lateral electrode inside is hollow, the stiff end port of described hook is provided with groove, the outside surface of described groove is provided with screw, the outside surface of the first end port of described UUT lateral electrode is provided with screw, the first end of described UUT lateral electrode is put into the groove of described hook, and the screw of the screw on described groove and described UUT lateral electrode is fixed by screw.
As other embodiments, described hook and described UUT lateral electrode can be integrated design.
As other embodiments, the articulated end of described hook is affiliated on described high-voltage capacitance, the stiff end of described hook directly is connected with described high-tension cable connecting line 4, and the cable core of described high-tension cable connecting line 4 directly is connected to the groove of the stiff end of described hook.
In the present embodiment, described the second cable web member 31 is the cable lateral electrode, described solid switch web member 32 is described solid switch lateral electrode 321, the first end of described cable lateral electrode is connected with described high-tension cable connecting line 4, the second end of described cable lateral electrode is connected with the first end of described solid switch lateral electrode 321, and the second end of described solid switch lateral electrode 321 is connected with the electrode of described solid switch.
The length of described cable lateral electrode is not less than 50mm, and external diameter is not less than 20mm; In the present embodiment, the length of described cable lateral electrode is 100mm, and external diameter is 50mm.
In the present embodiment, the corners processing is carried out in the end of described hook, described UUT lateral electrode, described cable lateral electrode and described solid switch lateral electrode 321, reduces the possibility of electric discharge.
In the present embodiment, described cable lateral electrode inside is hollow; The outside surface of the second end of described cable lateral electrode is provided with screw, shown in Fig. 2, Fig. 3, the round platform ring 6 caved in centered by described solid switch lateral electrode 321 belows, 6 fixations of described round platform ring, cylindrical rod 7 with the concentric setting of described round platform ring 6 is arranged in described round platform ring 6, the described cylindrical rod 7 of described solid switch lateral electrode 321 is put into the second end inside of described cable lateral electrode, and the screw that passes the second end outside surface of described cable lateral electrode by screw is fastenedly connected.
For the part of non-electricity, adopt the electric insulation material to carry out embedding, in the present embodiment, adopt epoxy resin to carry out embedding, shown in Fig. 2, Fig. 3, round platform adopts round platform 8 and the disk 9 of two of epoxy resin encapsulateds and the concentric setting of described round platform ring 6 outward.
In the present embodiment, the second end on described UUT lateral electrode and the first end of described cable lateral electrode overlap respectively insulating sleeve are arranged, for stopping the generation of electric discharge.
As other embodiments, described cable lateral electrode and described solid switch lateral electrode 321 are integrated design.
As other embodiments, shown in Figure 4, described UUT lateral electrode is the electrode that structure is identical with described cable lateral electrode, and actual test when being connected, without differentiation, has improved the versatility of using, and is convenient to connection, is simple and easy to use, fool proof.
Obviously, above-described embodiment is only for example clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.And the apparent variation of being extended out thus or change are still among the protection domain in the invention
.
Claims (10)
1. the cable outlet system for high-tension cable oscillation wave partial discharge detection system, is characterized in that, comprise,
UUT side bindiny mechanism, comprise UUT web member and the first cable web member, and described UUT web member is connected with UUT;
Solid switch side bindiny mechanism, comprise solid switch web member and the second cable web member, and described solid switch web member is connected with solid switch;
The high-tension cable connecting line, its two ends are connected with the described second cable web member of described solid switch side bindiny mechanism with the described first cable web member of described UUT side bindiny mechanism respectively.
2. the cable outlet system for high-tension cable oscillation wave partial discharge detection system according to claim 1, is characterized in that, described UUT web member is hook, and described the first cable web member is the UUT lateral electrode; The articulated end of described hook is affiliated on described UUT, and the stiff end of described hook is connected with the first end of described UUT lateral electrode, and the second end of described UUT lateral electrode is connected with described high-tension cable connecting line.
3. the cable outlet system for high-tension cable oscillation wave partial discharge detection system according to claim 2, is characterized in that, the first end of the stiff end of described hook and described UUT lateral electrode is fixed by screw.
4. according to the arbitrary described cable outlet system for high-tension cable oscillation wave partial discharge detection system of claim 1-3, it is characterized in that, described the second cable web member is the cable lateral electrode, described solid switch web member is described solid switch lateral electrode, the first end of described cable lateral electrode is connected with described high-tension cable connecting line, the second end of described cable lateral electrode is connected with the first end of described solid switch lateral electrode, and the second end of described solid switch lateral electrode is connected with described solid switch.
5. the cable outlet system for high-tension cable oscillation wave partial discharge detection system according to claim 4, is characterized in that, the second end of described cable lateral electrode and the first end of described solid switch lateral electrode are fixed by screw.
6. according to the described cable outlet system for high-tension cable oscillation wave partial discharge detection system of claim 4 or 5, it is characterized in that, the second end on described UUT lateral electrode and the first end of described cable lateral electrode overlap respectively insulating sleeve are arranged.
7. according to the arbitrary described cable outlet system for high-tension cable oscillation wave partial discharge detection system of claim 1-6, it is characterized in that, copper electrode or silver electrode that described UUT side bindiny mechanism and described solid switch side bindiny mechanism are withstand voltage 60kV, the cable that described high-tension cable connecting line is withstand voltage 100kV and sustained ceiling current 100A.
8. according to the arbitrary described cable outlet system for high-tension cable oscillation wave partial discharge detection system of claim 2-7, it is characterized in that, the corners processing is carried out in the end of described hook, described UUT lateral electrode, described cable lateral electrode and described solid switch lateral electrode.
9. according to the arbitrary described cable outlet system for high-tension cable oscillation wave partial discharge detection system of claim 1-9, it is characterized in that, the length of described UUT lateral electrode and described cable lateral electrode is not less than 50mm, and external diameter is not less than 20mm.
10. according to the arbitrary described cable outlet system for high-tension cable oscillation wave partial discharge detection system of claim 1-9, it is characterized in that, described UUT lateral electrode is the electrode that structure is identical with described cable lateral electrode.
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| CN201210590364.0A CN103123381B (en) | 2012-12-31 | 2012-12-31 | For the cable outlet system of high-tension cable oscillation wave partial discharge detection system |
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| CN106443090A (en) * | 2016-12-01 | 2017-02-22 | 广州供电局有限公司 | Segmental conductor resistance test auxiliary tool and test device |
| CN110208627A (en) * | 2019-06-20 | 2019-09-06 | 应急管理部四川消防研究所 | A kind of overcurrent ignition source prevention and control device fire prevention and control aptitude tests method |
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| CN103123381B (en) | 2015-11-04 |
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