Anti-pollution flashover method for high-voltage line insulator
A technology of high-voltage lines and insulators, applied in the field of insulators, can solve problems such as difficult to completely eliminate pollution flashover faults, and achieve the effects of ensuring safety, increasing creepage distance, and reducing voltage levels
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Embodiment 1
[0033] During the maintenance of this line, the number of insulators in the single-phase insulator string is increased to 10. No Replacement Insulated Pendant Clips. No anti-pollution flashover cover was pasted, and no insulating sheath was installed on the high-voltage side wires. The line resumed power transmission operation, and the zero-value tester was used to conduct a voltage test on 10 pieces of insulators. After confirming that the insulators were not damaged, the test results As shown in table 2:
[0034] Table 2
[0035] farewell
[0036] It can be seen from the data in the table that the actual leakage distance on the surface of the insulator is increased by adopting this improvement measure. Although the surface pollution problem of the insulator string is not solved, the overall voltage level of the insulator string is effectively reduced by increasing the number of insulators, and the insulator string is improved. Its own anti-pollution flashover abi...
Embodiment 2
[0038] During the maintenance of this line, the number of insulators in the single-phase insulator string was increased to 10 pieces, and the suspension clamps were replaced with insulated suspension clamps. No anti-pollution flashover cover was pasted, and no insulating sheath was installed on the high-voltage side wires. The line resumed power transmission operation, and the zero-value tester was used to conduct a voltage test on 10 pieces of insulators. After confirming that the insulators were not damaged, the test The results are shown in Table 3:
[0039] table 3
[0040] farewell
first piece
second piece
third piece
fourth piece
fifth piece
sixth piece
seventh piece
eighth piece
ninth piece
tenth piece
Phase A
2.7
2.3
1.8
1.9
1.7
2.1
2.6
3.2
3.7
5.4
Phase B
2.9
2.5
2.0
2.1
1.7
2.1
2.8
3.8
4.0
5.5
Phase C
2.8
2.7
2.1
2.0
1.8
...
Embodiment 3
[0044] During the maintenance of this line, the number of insulators in the single-phase insulator string was increased to 10 pieces, and the suspension clamps were replaced with insulated suspension clamps. On the edge of the second, sixth and ninth insulators, a circle of anti-pollution flashover covers were pasted, and no insulating sheath was installed on the high-voltage side wires. Three months after the line resumed power transmission and operation, the surface of the insulators had been polluted by salt, alkali, and flying dust. 10 pieces of insulators were tested with a zero value tester. On the premise of confirming that the insulators are not damaged, the test results are shown in Table 4:
[0045] Table 4
[0046] farewell
[0047]Note: The three-phase distributed voltage is measured sequentially from top to bottom by the insulator string, and the measurement unit is KV. The second, sixth, and ninth can not be measured after adding anti-pollution flashove...
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