CN101236809A - Raceway equalized voltage ring dual-connection DC compound insulator - Google Patents
Raceway equalized voltage ring dual-connection DC compound insulator Download PDFInfo
- Publication number
- CN101236809A CN101236809A CNA2008100468073A CN200810046807A CN101236809A CN 101236809 A CN101236809 A CN 101236809A CN A2008100468073 A CNA2008100468073 A CN A2008100468073A CN 200810046807 A CN200810046807 A CN 200810046807A CN 101236809 A CN101236809 A CN 101236809A
- Authority
- CN
- China
- Prior art keywords
- ring
- grading ring
- insulator
- strings
- grading
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Insulators (AREA)
Abstract
The invention relates to a track grading ring type duplex direct-current composite insulator, which comprises round grading rings and umbrella skirt strings, wherein, low pressure ends of two umbrella skirt strings are respectively provided with a round grading ring. The invention is characterized in that: high pressure ends of the two umbrella skirt strings are respectively provided with a track grading ring which consists of a ring body and a connecting piece; two straight ring bodies are connected between two separated semicircular ring bodies. Ideal distribution voltage can be obtained on the end part of the composite insulator; the electric potential distribution on umbrella skirts near the end part of the insulator is reduced; the accident of brittle failure of a mandrel due to corrosion wear of electric arcs on the mandrel is reduced; safety operation of electric networks is guaranteed.
Description
Technical field
The present invention relates to the DC power transmission line duplex DC compound insulator that has the runway grading ring.
Background technology
The assembly technology of China's organic composite insulator develops into present integral die from full skirt suit, segmentation mold pressing, end-fitting technology develops into whole compression joint type from early stage internally wedged, outer wedge-type, inside and outside wedge-type, plug quality and sealing property improved more greatly, made its mechanical performance obtain bigger improvement.The raising of the umbrella cover material hydrophobicity used of composite insulator and umbellate form develop into present big two umbellules, big optimized Measures such as two umbellules from isometrical umbrella, small one and large one umbrella in addition, have improved its electric property to a certain extent.At present, in the domestic direct current 500kV transmission line, use the good composite insulator of hydrophobicity performance and anti-fouling flashover performance in a large number, and used insulator is all installed pressure-equalizing device at two ends.Its objective is and improve composite insulator two ends electric-field intensity distribution, reduce the spread voltage near the full skirt in end, reduce electric arc that the galvanic corrosion of insulator end is decreased and cause the possibility of insulator end seal decreased performance, greatly reduce insulator falls string because of the plug corrosion accident rate.But from ruuning situation, the domestic insulator that still took place the string accident owing to what reasons such as core brittle fracture caused.Though it is very low that composite insulator falls the probability of string, in a single day the harmfulness of falling to go here and there is quite big.Therefore should adopt pair connection in series-parallel hangs for ± 500kV circuit, this falls the guarantee that provides of string accident for the reduction composite insulator, and its mechanical performance satisfies service requirement.But two connection in series-parallel operational modes are owing to proximity effect, and electric-field intensity distribution is different with single string around the insulator, thereby makes Potential distribution rule and single string there are differences, and pressure-equalizing device is particularly important to the effect that improves the insulator Potential distribution.The Potential distribution rule of direct current duplex composite insulator and the optimized choice of grading ring assembling mode are carried out detailed research,, provide safeguard useful life for prolonging insulator to obtain optimal Potential distribution rule.
Summary of the invention
The purpose of this invention is to provide a kind of raceway equalized voltage ring dual-connection DC compound insulator, improve the Potential distribution of duplex insulator, reduce the Potential distribution near the full skirt in insulator end, minimizing guarantees the safe operation of electrical network because of electric arc acts on the generation that causes the core brittle fracture accident to deteriorating of its.
Technical scheme of the present invention is: a kind of raceway equalized voltage ring dual-connection DC compound insulator, it comprises circular grading ring and full skirt string, the low-pressure end of two full skirt strings is installed a circular grading ring respectively, it is characterized in that: the high-pressure side at two full skirt strings is installed a runway grading ring; Described runway grading ring, it has ring body and connector, connects two straight way ring bodies between two semi-circular ring of separation.
Aforesaid raceway equalized voltage ring dual-connection DC compound insulator is characterized in that: the high-pressure side at two full skirt strings also is separately installed with a circular grading ring.
The invention has the beneficial effects as follows: can obtain more satisfactory spread voltage in the composite insulator end by adopting said structure, reduce the Potential distribution near the full skirt in insulator end, minimizing guarantees the safe operation of electrical network because of electric arc acts on the generation that causes the core brittle fracture accident to deteriorating of its.
Description of drawings
Fig. 1 a is the structural representation of the grading ring of existing circular ring body.
Fig. 1 b is the end view of Fig. 1 a.
Fig. 2 is the existing structural representation that has the duplex composite insulator of circular ring body grading ring.
Fig. 3 a, the runway grading ring front view of the embodiment of the invention.
Fig. 3 b, the vertical view of Fig. 3 a runway grading ring.
Fig. 3 c, the left view of Fig. 3 a runway grading ring.
Fig. 4 a is the vertical view of #1 runway grading ring of the present invention.
Fig. 4 b is the vertical view of #2 runway grading ring of the present invention.
Fig. 4 c is the vertical view of #3 runway grading ring of the present invention.
Fig. 5 a is the duplex composite insulator structural representation of the embodiment of the invention 1.
Fig. 5 b is the duplex composite insulator structural representation of the embodiment of the invention 2.
Fig. 5 c is the duplex composite insulator structural representation of the embodiment of the invention 3.
Fig. 6 a is the duplex composite insulator structural representation of the embodiment of the invention 4.
Fig. 6 b is the duplex composite insulator structural representation of the embodiment of the invention 5.
Fig. 6 c is the duplex composite insulator structural representation of the embodiment of the invention 6.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in detail.
The explanation of mark among Fig. 1: 1-ring body; The 2-connector; The 3-hex nut; The 4-hex nut; The 5-packing ring; The 6-hex nut; The circular grading ring of 7-.
The explanation of mark among Fig. 2: 8-locking pin; The 9-ball-and-socket; 10-full skirt string; 11-rod core; The 12-bulb, the 13-yoke plate.
The explanation of mark among Fig. 3: 14-runway grading ring, 15-straight way ring body; The 16-connector; The 17-semi-circular ring.
The duplex composite insulator can be divided into two string and two V strings of dangling, and its pressure-equalizing device has following several assembling mode:
1. high-pressure side and low-pressure end are only installed little pressure-equalizing device (prior art)
2. high-pressure side is installed the runway grading ring, and low-pressure end is installed circular grading ring;
3. high-pressure side is installed runway, circular grading ring simultaneously, and low-pressure end is installed circular grading ring.
Runway grading ring in the embodiment of the invention is divided into #1, #2, #3, and the line of apsides is 1300 * 700cm, the height of #1 connector 16 be 400cm (see Fig. 4 a), the height of #2 connector is that the height of 500cm (seeing Fig. 4 b), #3 connector is 600cm (seeing Fig. 4 c); Circular grading ring is Φ 400cm.
The different assembling modes of grading ring are to improving the effect difference of composite insulator Potential distribution.At 7 kinds of operating modes of above 3 kinds of modes, carried out the lot of data measurement, data are analyzed contrast, grasp the characteristic of two I strings and two V strings Potential distribution under different pressure-equalizing device assembling modes, select best pressure-equalizing device assembling mode, improve the Potential distribution of duplex insulator as far as possible, reduce the Potential distribution near the full skirt in insulator end, minimizing guarantees the safe operation of electrical network because of electric arc acts on the generation that causes the core brittle fracture accident to deteriorating of its.
The Potential distribution measuring instrument of duplex DC compound insulator adopts DC potential distribution measuring table, and its measuring principle is the dynamic condenser mensuration.So-called dynamic condenser mensuration is meant that the capacitor that can change by a capacitance is converted to the method that ac electric is measured then to tested direct current measurement.
Spacing between two probes of Potential distribution meter is got 9cm, can measure the spread voltage between a full skirt unit (comprising a gamp two umbellules).Begin to move to earth terminal from the sheath of high-pressure side junction, probe should contact sheath well, makes probe vertical with tested insulator sheath as far as possible.For guarantee measuring accurately, should guarantee that the following contact point of next spacing is identical with the last contact point of a last spacing, during measurement elder generation from high-pressure side to earth terminal, the double back and forth survey measurements from earth terminal to high-pressure side again, measurement result is got its mean value.Test method is carried out with reference to the method for testing of DL/T487-2000 " 330kV and 500kV exchange the spread voltage of aerial power transmission line insulator string " defined.
High-pressure side is installed the runway grading ring, and low-pressure end is installed the embodiment of circular grading ring referring to Fig. 5 a-Fig. 5 c.High-pressure side is installed runway grading ring, circular grading ring simultaneously, and low-pressure end is installed circular grading ring referring to Fig. 6 a-Fig. 6 c.
The result of the test of above-mentioned 7 kinds of operating modes shows, after high-pressure side had been installed certain cover and gone into the runway grading ring of the degree of depth, the Potential distribution situation of umbrella sheath unit was more satisfactory near its high-pressure side.Wherein when high-pressure side was installed a #2 or #3 runway grading ring, the spread voltage on first full skirt unit of high-pressure side accounted for 2.31% and 2.12% of test voltage; When high-pressure side adopts the aggregate erection of #2 and #4, #3 and two grading rings of #4, account for 2.27% and 2.1% of test voltage near the spread voltage on first full skirt unit of high-pressure side, with being installed, a #2 or #3 grading ring compare, and difference is also not obvious.From the economic technology angle, right ± 500kV duplex is dangled composite insulator suggestion employing at #2 grading ring of high-pressure side installation.
For ± the duplex-joint V-shaped composite insulator of 500kV, carried out the Potential distribution experimental study of above 7 kinds of operating modes equally, the analytical test result, as can be known when high-pressure side is only installed a runway grading ring, it is better that #2, #3 grading ring improve the Potential distribution effect of high pressure end, and its spread voltage is respectively 3.47% and 3.32% of test voltage; When high-pressure side is installed #2 and #4, #3 and two grading rings of #4, can reduce the spread voltage of high pressure end largely equally, only account for 2.72% and 2.45% of test voltage respectively, with a #2 only is installed, the #3 grading ring is compared, and has reduced by 0.75% and 0.87%.If only from the Potential distribution angle, #3 is best with two grading ring effects of #4 in the high-pressure side assembling, but that the arcing distance of composite insulator can reduce because the degree of depth gone into by the excessive cover of grading ring is more, its lightning withstand level possibility so and descend.Therefore take all factors into consideration, for ± the duplex-joint V-shaped composite insulator of 500kV, high-pressure side should adopt the assembling mode of #2 and two grading rings of #4.
Claims (2)
1, a kind of raceway equalized voltage ring dual-connection DC compound insulator, it comprises circular grading ring and full skirt string, the low-pressure end of two full skirt strings is installed a circular grading ring respectively, it is characterized in that: the high-pressure side at two full skirt strings is installed a runway grading ring; Described runway grading ring, it has ring body and connector, connects two straight way ring bodies between two semi-circular ring of separation.
2, raceway equalized voltage ring dual-connection DC compound insulator as claimed in claim 1 is characterized in that: the high-pressure side at two full skirt strings also is separately installed with a circular grading ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100468073A CN101236809A (en) | 2008-01-29 | 2008-01-29 | Raceway equalized voltage ring dual-connection DC compound insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100468073A CN101236809A (en) | 2008-01-29 | 2008-01-29 | Raceway equalized voltage ring dual-connection DC compound insulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101236809A true CN101236809A (en) | 2008-08-06 |
Family
ID=39920349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100468073A Pending CN101236809A (en) | 2008-01-29 | 2008-01-29 | Raceway equalized voltage ring dual-connection DC compound insulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101236809A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531313A (en) * | 2013-06-20 | 2014-01-22 | 国家电网公司 | Composite insulator |
| CN104240865A (en) * | 2014-08-26 | 2014-12-24 | 江东金具设备有限公司 | Composite insulator triple Y-shaped overhung string |
| WO2015078015A1 (en) * | 2013-11-28 | 2015-06-04 | 国家电网公司 | 1,200kv extra-high-voltage bar-shaped suspension type composite insulator |
-
2008
- 2008-01-29 CN CNA2008100468073A patent/CN101236809A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531313A (en) * | 2013-06-20 | 2014-01-22 | 国家电网公司 | Composite insulator |
| WO2015078015A1 (en) * | 2013-11-28 | 2015-06-04 | 国家电网公司 | 1,200kv extra-high-voltage bar-shaped suspension type composite insulator |
| CN104240865A (en) * | 2014-08-26 | 2014-12-24 | 江东金具设备有限公司 | Composite insulator triple Y-shaped overhung string |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206331073U (en) | A kind of electric cable fitting interface flashover test device | |
| CN203616429U (en) | Voltage test apparatus | |
| CN105092380A (en) | Device for testing comprehensive performance of round wire concentric lay overhead electrical stranded conductor | |
| CN101236809A (en) | Raceway equalized voltage ring dual-connection DC compound insulator | |
| CN205791227U (en) | Charged for replacement UHV transmission line insulator chain tool set | |
| CN112771388A (en) | Test point voltage sensor for high voltage separable connector | |
| CN205861841U (en) | A kind of anti-icing anti-thunder insulator assay device | |
| CN201425866Y (en) | Highly bending resistant composite post insulator | |
| CN201174283Y (en) | DC raceway equalized voltage ring and duplex DC combined insulator | |
| CN201663318U (en) | Three-phase cable connector | |
| CN103683269B (en) | A kind of divider grading ring Optimization Design considering external insulation pollution | |
| CN201237973Y (en) | Sulfur hexafluoride current mutual inductor with small-diameter casing tube | |
| CN106054044A (en) | Insulation test device for gas filled tank | |
| CN207217816U (en) | A kind of multi-angle high-voltage grounding wire | |
| CN204204524U (en) | A kind of overhead transmission line combined insulator suspension string | |
| CN1558249A (en) | Charged detection method for insulator of high voltage direct current transmission line | |
| CN204903302U (en) | Concentric turntable hollow wire comprehensive properties testing arrangement of circle line | |
| CN201773679U (en) | Wire inlet sleeve | |
| CN210837426U (en) | Transformer core ground lead structure | |
| CN209607925U (en) | Terminal plate | |
| CN210119999U (en) | Insulator capable of preventing dust accumulation | |
| CN208568967U (en) | Device for measuring voltage distribution of porcelain suspension insulator string | |
| CN201615936U (en) | Online monitoring device for state of insulation of capacitive current transformer | |
| CN2919471Y (en) | Electrical-ageing-proof type supervoltage AC suspension insulator chain | |
| CN201340441Y (en) | Composite insulator leakage current sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE NETWORK ELECTRIC POWER RESEARCH INSTITUTE Free format text: FORMER OWNER: WUHAN HIGH VOLTAGE RESEARCH INSTITUTE OF STATE GRID Effective date: 20091120 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20091120 Address after: Nanjing City, Jiangsu Province, South ruilu No. 8 post encoding: 210003 Applicant after: State Grid Electric Power Research Insititute Address before: Hubei province Wuhan city Hongshan District Luoyu Road No. 143 post encoding: 430074 Applicant before: Guowang Wuhan High Voltage Inst |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080806 |