CN105301361B - The method of transmission line insulator resistance is measured under strong jamming state - Google Patents
The method of transmission line insulator resistance is measured under strong jamming state Download PDFInfo
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- CN105301361B CN105301361B CN201510589552.5A CN201510589552A CN105301361B CN 105301361 B CN105301361 B CN 105301361B CN 201510589552 A CN201510589552 A CN 201510589552A CN 105301361 B CN105301361 B CN 105301361B
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000005540 biological transmission Effects 0.000 title claims abstract description 11
- 239000012212 insulator Substances 0.000 title claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 31
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 10
- 239000010703 silicon Substances 0.000 claims abstract description 10
- 230000005611 electricity Effects 0.000 claims description 7
- 238000009413 insulation Methods 0.000 abstract description 18
- 238000005259 measurement Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
A method of measuring transmission line insulator resistance under strong jamming state, it is characterized in that: the low-pressure side voltage of booster B is adjusted by pressure regulator T, booster B low-pressure side voltage value is read by voltmeter V, booster B high side voltage value is determined according to booster B no-load voltage ratio；The terminal open circuit of test line Cz is read Leakage Current value i by microampere meter μ A, be exactly the insulating resistance value of test line Cz by the calculated value that formula R=u/i is obtained by high voltage silicon rectifier stack D in 30,000~50,000 volts of the application of test line Cz head end of DC voltage.The method that the present invention takes measurement leakage current, apply the much higher DC voltage of the output voltage of an insulativity table on test line, read leakage current, calculate insulating resistance value by formula, prevent due to its induced voltage and induced current are very big and the electric current of insulation resistance meter output is smaller and causes to be unable to measure out insulation resistance even insulation resistance meter is burnt.
Description
Technical field
The method that the present invention relates to a kind of to measure transmission line insulator resistance under strong jamming state.
Background technique
Newly-built ultra-high-tension power transmission line is in the insulation situation that before putting into operation, should check route, usually using insulation resistance meter
Measure insulation resistance.But in 500kV substation, when measuring 220kV and the above transmission line of electricity, due to parallel lines on same tower or power transformation
Electromagnetic coupling and electrostatic coupling in standing between adjacent working line and test line, the induced voltage generated on test line
And induced current, when the p-wire of insulation resistance meter is connected on test line, since its induced voltage and induced current are very big,
And smaller can will result in of electric current of insulation resistance meter output is unable to measure out insulation resistance or even insulation resistance meter is burnt.
Summary of the invention
The present invention is to solve insulation resistance is unable to measure in the case of live strong jamming, one kind is provided in strong jamming
The method of transmission line insulator resistance is measured under state.
The technical solution of the invention is as follows:
The method that transmission line insulator resistance is measured under strong jamming state, is characterized in that:
1,220V AC power source, pressure regulator T output end are terminated using the input of pressure regulator T, booster B, the pressure regulator T
It is connect with booster B low-pressure side, in booster B low-pressure side shunt voltage Table V, the high-pressure side booster B passes through high voltage silicon rectifier stack D, micro-
Peace table μ A is connect with the head end of test line Cz；
2, the low-pressure side voltage that booster B is adjusted by the pressure regulator T connecting with 220V AC power source, is risen by being connected in parallel on
The voltmeter V of depressor B low-pressure side reads booster B low-pressure side voltage value, determines the high-pressure side booster B according to booster B no-load voltage ratio
Voltage value；
3, by the terminal open circuit of test line Cz, booster B high side voltage is converted to by direct current by high voltage silicon rectifier stack D
Pressure applies 30,000~50,000 volts of DC voltage in test line Cz head end, first by being connected to high voltage silicon rectifier stack D and test line Cz
The microampere meter μ A at end reads Leakage Current value i, is booster B high side voltage value, obtained calculating by formula R=u/i, u
Value is exactly the insulating resistance value of test line Cz.
The beneficial effects of the present invention are: the method that the present invention takes measurement leakage current, applies one on test line
The much higher DC voltage of the output voltage of insulativity table reads leakage current, calculates insulating resistance value by formula,
Prevent due to its induced voltage and induced current are very big and the electric current of insulation resistance meter output is smaller and causes to be unable to measure out absolutely
Edge resistance even burns insulation resistance meter.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention.
Specific embodiment
As shown, the method for measuring transmission line insulator resistance under strong jamming state, its step are as follows:
1,220V AC power source, pressure regulator T output end are terminated using the input of pressure regulator T, booster B, the pressure regulator T
It is connect with booster B low-pressure side, in booster B low-pressure side shunt voltage Table V, the high-pressure side booster B passes through high voltage silicon rectifier stack D, micro-
Peace table μ A is connect with the head end of test line Cz；
2, the low-pressure side voltage that booster B is adjusted by the pressure regulator T connecting with 220V AC power source, is risen by being connected in parallel on
The voltmeter V of depressor B low-pressure side reads booster B low-pressure side voltage value, determines the high-pressure side booster B according to booster B no-load voltage ratio
Voltage value；
3, by the terminal open circuit of test line Cz, booster B high side voltage is converted to by direct current by high voltage silicon rectifier stack D
Pressure applies 30,000~50,000 volts of DC voltage in test line Cz head end, and the present embodiment applies 40,000 volts of DC voltages, passes through company
It connects and reads Leakage Current value i in the microampere meter μ A of high voltage silicon rectifier stack D and test line Cz head end, be boosting by formula R=u/i, u
Device B high side voltage value, obtained calculated value are exactly the insulating resistance value of test line Cz.
In Jinzhou, power supply 220kV electricity Dong #1, #2 route carries out Insulation test before putting into operation, and megger test value is that three-phase is equal
For 1000M Ω, after operation 2 years, aerial earth wire transformation is carried out to 220kV electricity Dong's #1 line outage, transmission line of electricity is constant, puts into operation
Preceding requirement carries out Insulation test, due to the induced electricity that in the operation of adjacent 220kV electricity Dong #2 line, electric Dong #2 line generates electric Dong #1 line
Stream burns insulation resistance meter moment, is tested using the method for applying DC voltage, and application voltage is 40000V, micro-
Peace meter reading is 42 μ A, B phase of A phase, 40 μ A, C phase, 41 μ A, is calculated by formula R=u/i, obtains A phase 952M Ω, B phase 1000M
Ω, C phase 976M Ω, are consistent substantially with the insulating resistance value that last time is tested with insulation resistance meter.
After the aerial earth wire of double #1, #2 routes in Jinzhou north power supply 220kV, black #1, #2 route of 220kV water is transformed, carry out
Megger test, in the case where not interfering with before as a result all putting into operation with route test value is essentially identical.
Experiment shows can be complete test line is in strong jamming in 500kV substation or 220kV substation
At test job, solve the problems, such as that Conventional insulation ohmmeter cannot complete test job.
The above is only specific embodiments of the present invention, are not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (1)
1. the method that transmission line insulator resistance is measured under strong jamming state, it is characterized in that steps are as follows:
1), using pressure regulator T, booster B, the pressure regulator T input terminate 220V AC power source, pressure regulator T output end with
The connection of booster B low-pressure side, in booster B low-pressure side shunt voltage Table V, the high-pressure side booster B passes through high voltage silicon rectifier stack D, microampere
Table μ A is connect with the head end of test line Cz；
2) low-pressure side voltage that booster B, is adjusted by the pressure regulator T connecting with 220V AC power source, by being connected in parallel on boosting
The voltmeter V of device B low-pressure side reads booster B low-pressure side voltage value, determines the high-pressure side booster B electricity according to booster B no-load voltage ratio
Pressure value；
3), by the terminal open circuit of test line Cz, booster B high side voltage is converted to by DC voltage by high voltage silicon rectifier stack D,
Apply 30,000~50,000 volts of DC voltage in test line Cz head end, by being connected to high voltage silicon rectifier stack D and test line Cz head end
Microampere meter μ A read Leakage Current value i, by formula R=u/i, u is booster B high side voltage value, obtained calculated value
It is exactly the insulating resistance value of test line Cz.
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| CN201510589552.5A CN105301361B (en) | 2015-09-16 | 2015-09-16 | The method of transmission line insulator resistance is measured under strong jamming state |
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| CN201510589552.5A CN105301361B (en) | 2015-09-16 | 2015-09-16 | The method of transmission line insulator resistance is measured under strong jamming state |
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| CN105301361B true CN105301361B (en) | 2019-01-25 |
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| CN108732425B (en) * | 2018-07-07 | 2020-10-13 | 国网福建省电力有限公司 | Method for monitoring resistance value of power supply line of low-voltage distribution network in real time |
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| CN2206967Y (en) * | 1993-12-13 | 1995-09-06 | 青岛制冷技术研究所 | Electrical property comprehensive test instrument of electrical equipment |
| CN201917638U (en) * | 2010-12-07 | 2011-08-03 | 沈阳洪达橡塑总厂 | Insulation-resistance and withstand-voltage experimental facility |
| CN102253089B (en) * | 2011-04-27 | 2013-01-02 | 西安交通大学 | Method for nondestructively detecting and evaluating mass defect level of high-voltage ceramic capacitors |
| CN103323750B (en) * | 2013-05-30 | 2016-06-01 | 国家电网公司 | For the different sound inspection method of high pressure seal switching cabinet or sealing bus bar and inspection units |
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