CN103399259B - Based on the input signal recognition methods of single-end suspension simulation model - Google Patents
Based on the input signal recognition methods of single-end suspension simulation model Download PDFInfo
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- CN103399259B CN103399259B CN201310359242.5A CN201310359242A CN103399259B CN 103399259 B CN103399259 B CN 103399259B CN 201310359242 A CN201310359242 A CN 201310359242A CN 103399259 B CN103399259 B CN 103399259B
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- 238000004088 simulation Methods 0.000 title claims abstract description 20
- 239000000725 suspension Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000007547 defect Effects 0.000 claims abstract description 18
- 230000017105 transposition Effects 0.000 claims abstract description 8
- 238000005086 pumping Methods 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000006378 damage Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 241000531891 Alburnus alburnus Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 206010063900 Steal syndrome Diseases 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The present invention relates to a kind of input signal recognition methods based on single-end suspension simulation model, described single-end suspension simulation model comprises the cable body that multistage is connected successively, concentric cable is serially connected with between two between adjacent segment cable body, first paragraph cable body and final stage cable body are all connected to grounding box, wherein except the concentric cable at existing defects place, all the other concentric cable two ends are all parallel with transposition case, the concentric cable two ends at described existing defects place are provided with the first voltage table and the second voltage table, described input signal recognition methods comprises the following steps: 1) add pumping signal at the input end of single-end suspension simulation model, 2) controller reads the induced voltage data of the first voltage table and the second voltage table respectively, calculates average induced voltage data, 3) controller judges the type of input signal according to average induced voltage data.Compared with prior art, the present invention has and effectively improves the advantage such as scene detection efficiency and accuracy of detection.
Description
Technical field
The present invention relates to a kind of cables simulation technology, especially relate to a kind of input signal recognition methods based on single-end suspension simulation model.
Background technology
The mode that District of Shanghai high-tension cable mainly takes comb to lay, middle transposition case and grounding box all adopt the fiberglass double door console mode of Uniting, are mostly arranged on the walkway near work well, greenery patches.Adopt transposition case, the grounding box of ground vertical, have the convenient advantage of installing, running, overhauling and detect, but also easily destroyed simultaneously.Shanghai Power Network 110kV and above cable sheath earthed system defect main Types are divided into: municipal works are transformed; Outside destroy; Steal; Operational defect.
Added up by the defect number of times occurred 110kV in 2009,2010 and above cable sheath earthed system, result is as following table 1:
Table 1
1) municipal works transformation: due to the composite demand of urban development, town road needs reconstruction and widens, so the transposition case be placed on road surface needs displacement.Need to cut-off concentric cable in shift operation process, temporarily destroy cable sheath earthed system.
2) outside destroy: outside destroy is car hit case mainly, illegal excavation and barbarous construction cause earthed system to damage.Outside destroy is a significant problem of cable sheath earthed system defect always, and the outside destroy number of times of 09,10 year remains basically stable, and maintains a high level.
3) steal: the annex adopted due to cable sheath earthed system, as concentric cable, transposition (ground connection) row etc. are copper product, price is high.In these 2 years, steal phenomenon all occurs in region, Songjiang, and residing area is comparatively remote bleak and desolate, as SS1167/1169.Although the proportion that pilferage situation accounts for all defects count is comparatively large, and the earthed system damaged condition that pilferage causes is very serious, and even also encountered three continuous shifting sections and all destroy, serious harm cable body runs.Carry out repair difficulty greatly to the earthed system after stealing, hot line job jeopardizes staff's life security, also lacks correlation experience and concrete code, can only adopt power failure operation.
4) operational defect: the defect found in routine test, such as sheath protector insulation resistance is lower than setting, needs to change; Or stake resistance is excessive, ground connection etc. be reinstalled.
Therefore how the input signal of cable system is identified effectively, thus determine the origin cause of formation that defect causes further, thus improve overhaul efficiency further and prevent defect from occurring.
Summary of the invention
Object of the present invention be exactly in order to overcome above-mentioned prior art exist defect and a kind of input signal recognition methods based on single-end suspension simulation model is provided.
Object of the present invention can be achieved through the following technical solutions:
A kind of input signal recognition methods based on single-end suspension simulation model, described single-end suspension simulation model comprises the cable body that multistage is connected successively, concentric cable is serially connected with between two between adjacent segment cable body, first paragraph cable body and final stage cable body are all connected to grounding box, wherein except the concentric cable at existing defects place, all the other concentric cable two ends are all parallel with transposition case, the concentric cable two ends at described existing defects place are provided with the first voltage table and the second voltage table, it is characterized in that, described input signal recognition methods comprises the following steps:
1) pumping signal is added at the input end of single-end suspension simulation model;
2) controller reads the induced voltage data of the first voltage table and the second voltage table respectively, calculates average induced voltage data;
3) controller judges the type of input signal according to average induced voltage data.
According to induced voltage data, described controller judges that the type of input signal is specially:
31) if average induced voltage data exceed setting first threshold, then judge that input signal is lightning surge signal;
32) if average induced voltage data are between Second Threshold and first threshold, then judge that input signal is switching overvoltage signal;
33) if average induced voltage data are lower than Second Threshold, then judge that input signal is normal operation signal.
If cable adopts 110kV cross section to be 800mm
2cable, described first threshold is 230 to 280KV, and described Second Threshold is 100 to 150KV.
Described first threshold is 250KV, and described Second Threshold is 130KV.
Compared with prior art, the present invention has the multiple electric cable stoppage of emulation, establishes the database of electric cable stoppage type and induced voltage, for Site Detection provides data basis, thus effectively improves scene detection efficiency and accuracy of detection.
Accompanying drawing explanation
Fig. 1 is one end of the present invention suspension simulation model schematic diagram;
First voltage table induced voltage curve map when Fig. 2 is lightning surge signal;
Second voltage table induced voltage curve map when Fig. 3 is lightning surge signal;
First voltage table induced voltage curve map when Fig. 4 is switching overvoltage signal;
Second voltage table induced voltage curve map when Fig. 5 is switching overvoltage signal.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
A kind of input signal recognition methods based on single-end suspension simulation model, as shown in Figure 1, described one end suspension simulation model comprises the cable body 1 that multistage is connected successively, concentric cable 2 is serially connected with between two between adjacent segment cable body 1, first paragraph cable body 1 and final stage cable body 1 are all connected to grounding box 4, and wherein except the concentric cable at existing defects place, all the other concentric cable two ends are all parallel with transposition case 3.The concentric cable two ends at described existing defects place are provided with the first voltage table 5 and the second voltage table 6.
Described input signal recognition methods comprises the following steps:
1) pumping signal is added at the input end of single-end suspension simulation model;
2) controller reads the induced voltage data of the first voltage table and the second voltage table respectively, calculates average induced voltage data;
3) controller judges the type of input signal according to average induced voltage data.
According to induced voltage data, described controller judges that the type of input signal is specially:
31) if average induced voltage data exceed setting first threshold, then judge that input signal is lightning surge signal;
32) if average induced voltage data are between Second Threshold and first threshold, then judge that input signal is switching overvoltage signal;
33) if average induced voltage data are lower than Second Threshold, then judge that input signal is normal operation signal.
If cable adopts 110kV cross section to be 800mm
2cable, described first threshold is 250KV, and described Second Threshold is 130KV.
One, normal operation signal:
First voltage table 5, second voltage table 6 measurement data is as shown in table 2.
from table 2, can find out, during displacement, cause the impact of mode on the induced voltage of metallic sheath to be single-end earthed very serious.
Two, lightning surge signal
When lightning surge, the induction voltage waveform of the first voltage table and the second voltage table as shown in Figures 2 and 3.
Draw from figure, the maximal value at the first voltage table place is: A (331.5kV), B (336.2kV), C (321.7kV); The maximal value at the second voltage table place is: A (382.1kV), B (369.2kV), C (298.7kV).
Three, switching overvoltage signal
When switching overvoltage, the induction voltage waveform of the first voltage table and the second voltage table as shown in Figures 4 and 5.
Can find out in figure, during switching overvoltage, the maximal value at the first voltage table place is: A (151.5kV), B (157.3kV), C (164.9kV); The maximal value at the second voltage table place is: A (189.6kV), B (199.6kV), C (212.0kV).
Claims (3)
1. the input signal recognition methods based on single-end suspension simulation model, described single-end suspension simulation model comprises the cable body that multistage is connected successively, concentric cable is serially connected with between two between adjacent segment cable body, first paragraph cable body and final stage cable body are all connected to grounding box, wherein except the concentric cable at existing defects place, all the other concentric cable two ends are all parallel with transposition case, the concentric cable two ends at described existing defects place are provided with the first voltage table and the second voltage table, it is characterized in that, described input signal recognition methods comprises the following steps:
1) pumping signal is added at the input end of single-end suspension simulation model;
2) controller reads the induced voltage data of the first voltage table and the second voltage table respectively, calculates average induced voltage data;
3) controller judges the type of input signal according to average induced voltage data;
According to average induced voltage data, described controller judges that the type of input signal is specially:
31) if average induced voltage data exceed setting first threshold, then judge that input signal is lightning surge signal;
32) if average induced voltage data are between Second Threshold and first threshold, then judge that input signal is switching overvoltage signal;
33) if average induced voltage data are lower than Second Threshold, then judge that input signal is normal operation signal.
2. a kind of input signal recognition methods based on single-end suspension simulation model according to claim 1, is characterized in that, if cable adopts 110kV cross section to be 800mm
2cable, described first threshold is 230 to 280KV, and described Second Threshold is 100 to 150KV.
3. a kind of input signal recognition methods based on single-end suspension simulation model according to claim 2, it is characterized in that, described first threshold is 250KV, and described Second Threshold is 130KV.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201607479U (en) * | 2009-12-18 | 2010-10-13 | 广东电网公司电力科学研究院 | Over-voltage non-contact on-line monitoring and identifying integrated device for power grid |
| CN102735947A (en) * | 2012-06-05 | 2012-10-17 | 贵州电力试验研究院 | Power grid overvoltage identification method by adopting multi-parameter ratio codes |
| CN103076545A (en) * | 2012-12-31 | 2013-05-01 | 广州供电局有限公司 | Electrified length measurement and local discharge detection and positioning simulation system for high voltage cable |
-
2013
- 2013-08-16 CN CN201310359242.5A patent/CN103399259B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201607479U (en) * | 2009-12-18 | 2010-10-13 | 广东电网公司电力科学研究院 | Over-voltage non-contact on-line monitoring and identifying integrated device for power grid |
| CN102735947A (en) * | 2012-06-05 | 2012-10-17 | 贵州电力试验研究院 | Power grid overvoltage identification method by adopting multi-parameter ratio codes |
| CN103076545A (en) * | 2012-12-31 | 2013-05-01 | 广州供电局有限公司 | Electrified length measurement and local discharge detection and positioning simulation system for high voltage cable |
Non-Patent Citations (4)
| Title |
|---|
| 110kV及以上XLPE电缆局放信号的识别方法;蒋晓娟 等;《华东电力》;20130630;第41卷(第6期);第1287-1288，图1-2 * |
| A Smart On-line Over-voltage Layered Identification System;Du lin 等;《2012 IEEE International Conference on Condition Monitoring and Diagnosis》;20121231;第874-877页 * |
| Estimation of the Maximal Voltage Induced on an Overhead Line Due to the Nearby Lightning;Voislav Jankov;《IEEE Transactions on Power Delivery》;19970131;第12卷(第1期);第315-324页 * |
| 冲击过电压引起的电缆护层感应电压及其改造;贾寿松;《赤峰学院学报（自然科学版）》;20091231;第25卷(第12期);第138页第2节 * |
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