CN106054098A - Partial discharge on-site calibration method for high-voltage cable line GIS terminal - Google Patents
Partial discharge on-site calibration method for high-voltage cable line GIS terminal Download PDFInfo
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- CN106054098A CN106054098A CN201610679366.5A CN201610679366A CN106054098A CN 106054098 A CN106054098 A CN 106054098A CN 201610679366 A CN201610679366 A CN 201610679366A CN 106054098 A CN106054098 A CN 106054098A
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- grounding
- partial discharge
- gis terminal
- switch
- disconnecting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention relates to a partial discharge on-site calibration method for a high-voltage cable line GIS terminal, and the technical characteristics of the method are that the method comprises the following steps: switching off a circuit breaker, a first disconnecting switch and a second disconnecting switch, and switching on a first grounding knife switch and a second knife switch; switching on a rapid grounding knife switch, and switching off an external grounding connection piece of the rapid grounding knife switch; enabling a partial discharge standard pulse generator to be connected to the external grounding connection piece of the rapid grounding knife switch; enabling a high-frequency current sensor to be clamped on a protection layer grounding line of a GIS terminal direct grounding box; connecting the high-frequency current sensor and a partial discharge measurement device through a coaxial signal line; transmitting a standard partial discharge pulse pC through the partial discharge standard pulse generator, measuring a detection value mV of the partial discharge measurement device, and achieving the on-site calibration of the partial discharge of the GIS terminal. The method is reasonable in design, achieves the on-site calibration function of the partial discharge of the GIS terminal, is high in accuracy, is simple in operation, and is convenient to use.
Description
Technical field
The invention belongs to Voltage Cable Lines Construction Partial Discharge Detecting Technology field, especially a kind of Voltage Cable Lines Construction GIS
Terminal shelf depreciation field calibration method.
Background technology
110kV and above Voltage Cable Lines Construction mainly include cable body and cable accessory, and wherein cable is attached
Part (including cable termination and transition joint) is the weak link of high pressure stub cable circuit, the particularly quality problems of adnexa itself
And the insulation defect caused during site operation is the main cause of cable line fault.According to statistics, cable line fault
95% be above causing due to cable accessory.For the Voltage Cable Lines Construction run, high frequency electric shelf depreciation band electric-examination
Survey is the effective ways of detection insulation hidden danger.By on cable termination earth lead and the company of the cross interconnected case of insulation intermediate connector
High frequency partial discharge pulse current signal in High Frequency Current Sensor detection earth current is installed on sheet, evaluates cable termination
Running status.
But in actual test process, the numerical value unit that live detection obtains is usually mV, it is impossible to be directly changed into local
Discharge capacity pC, it is impossible to directly reflect the order of severity of shelf depreciation, and repetitive measurement can only be passed through, carry out Long-term change trend and carry out
Judging, its accuracy is poor.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that one is reasonable in design, accuracy is high and user
Just Voltage Cable Lines Construction GIS terminal shelf depreciation field calibration method.
The present invention solves it and technical problem is that and take techniques below scheme to realize:
A kind of Voltage Cable Lines Construction GIS terminal shelf depreciation field calibration method, comprises the following steps:
Step 1, Voltage Cable Lines Construction GIS terminal cable outlet is sequentially connected with the first disconnecting switch, chopper, second every
Leaving pass on bus, the common point of this chopper and the first disconnecting switch passes through the first grounding switch ground connection, this chopper and
The common point of the second disconnecting switch passes through the second grounding switch ground connection, and this cable outlet is by rapid grounding disconnecting link, other places ground connection
Ground connection in flakes；
Step 2, successively chopper, the first disconnecting switch and the second disconnecting switch are pulled open, and first grounding switch that closes
With the second grounding switch；
Step 3, rapid grounding disconnecting link is closed, disconnect the external ground of rapid grounding disconnecting link in flakes；
Step 4, office is put basic pulse generator it is connected to the external ground of rapid grounding disconnecting link and goes up in flakes；
Step 5, High Frequency Current Sensor is stuck in GIS terminal it is directly grounded on the sheath earth lead of case；
Step 6, High Frequency Current Sensor is connected with one end of coaxial signal line；
Step 7, the other end of coaxial signal line is connected to partial-discharge measuring device；
Step 8, office put basic pulse generator and send a Bureau of Standards and put pulse pC, measure partial-discharge measuring device
Detected value mV, obtains the ratio between detected value mV and calibration pulse pC, thus realizes the field calibration of GIS terminal shelf depreciation
Function.
Advantages of the present invention and good effect be:
The present invention is before cable run puts into operation, by chopper, disconnecting switch and the cooperation of grounding switch, it is achieved to GIS
The field calibration of terminal shelf depreciation so that the detected value that the shelf depreciation live detection that cable run is carried out after putting into operation obtains is just
Can be directly changed into partial discharge quantity pC, thus directly reflect the order of severity of shelf depreciation, this method is simple to operate, just
Apply in scene.
Accompanying drawing explanation
Fig. 1 is Voltage Cable Lines Construction GIS terminal cable outlet schematic diagram；
Fig. 2 is the connection diagram that basic pulse generator is put in shelf depreciation scene Voltage Cable Lines Construction GIS terminal and office；
Fig. 3 is shelf depreciation scene Voltage Cable Lines Construction GIS terminal and High Frequency Current Sensor, coaxial signal line, locally
The connection diagram of discharge measuring device；
Wherein, 1-external ground is in flakes；Basic pulse generator is put in 2-office；3-High Frequency Current Sensor；4-is coaxial
Holding wire；5-partial-discharge measuring device.
Detailed description of the invention
Below in conjunction with accompanying drawing, the embodiment of the present invention is further described:
A kind of Voltage Cable Lines Construction GIS terminal shelf depreciation field calibration method, as shown in Figure 1 to Figure 3, including following step
Rapid:
Step 1, as shown in Figure 1, Voltage Cable Lines Construction GIS terminal cable outlet is sequentially connected with the first disconnecting switch (-
2), in chopper, the second disconnecting switch (-4) to bus, the common point of chopper and the first disconnecting switch (-2) connects by first
Ground disconnecting link (-27) ground connection, the common point of chopper and the second disconnecting switch (-4) passes through the second grounding switch (-47) ground connection, should
Cable outlet is by rapid grounding disconnecting link (-17), other places ground connection ground connection in flakes.
Step 2, successively chopper, the first disconnecting switch (-2) and the second disconnecting switch (-4) are pulled open, and close first
Grounding switch (-27) and the second grounding switch (-47)；
Step 3, rapid grounding disconnecting link (-17) in Fig. 1 is closed, disconnect the external ground of rapid grounding disconnecting link (-17)
In flakes 1；
Step 4, office is put basic pulse generator 2 it is connected to the external ground of rapid grounding disconnecting link (-17) in flakes on 1,
As shown in Figure 2；
Step 5, High Frequency Current Sensor 3 is stuck in GIS terminal it is directly grounded on the sheath earth lead of case；
Step 6, High Frequency Current Sensor 3 is connected with coaxial signal line 4 one end；
Step 7, coaxial signal line 4 other end is connected to partial-discharge measuring device 5；
Step 8, office put basic pulse generator 2 and send a Bureau of Standards and put pulse pC, measure partial-discharge measuring device 5
Detected value mV, obtain the ratio between detected value mV and calibration pulse pC, thus realize the on-the-spot mark of GIS terminal shelf depreciation
Determine function.
It is emphasized that embodiment of the present invention is illustrative rather than determinate, bag the most of the present invention
Include the embodiment being not limited to described in detailed description of the invention, every by those skilled in the art according to technical scheme
Other embodiments drawn, also belong to the scope of protection of the invention.
Claims (1)
1. a Voltage Cable Lines Construction GIS terminal shelf depreciation field calibration method, it is characterised in that comprise the following steps:
Step 1, Voltage Cable Lines Construction GIS terminal cable outlet is sequentially connected with the first disconnecting switch, chopper, second keeps apart
Closing to bus, the common point of this chopper and the first disconnecting switch passes through the first grounding switch ground connection, this chopper and second
The common point of disconnecting switch passes through the second grounding switch ground connection, and this cable outlet is by rapid grounding disconnecting link, other places ground connection in flakes
Ground connection；
Step 2, successively chopper, the first disconnecting switch and the second disconnecting switch are pulled open, and the first grounding switch and that closes
Two grounding switchs；
Step 3, rapid grounding disconnecting link is closed, disconnect the external ground of rapid grounding disconnecting link in flakes；
Step 4, office is put basic pulse generator it is connected to the external ground of rapid grounding disconnecting link and goes up in flakes；
Step 5, High Frequency Current Sensor is stuck in GIS terminal it is directly grounded on the sheath earth lead of case；
Step 6, High Frequency Current Sensor is connected with one end of coaxial signal line；
Step 7, the other end of coaxial signal line is connected to partial-discharge measuring device；
Step 8, office put basic pulse generator and send a Bureau of Standards and put pulse pC, measure the detection of partial-discharge measuring device
Value mV, obtains the ratio between detected value mV and calibration pulse pC, thus realizes the field calibration merit of GIS terminal shelf depreciation
Energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610679366.5A CN106054098B (en) | 2016-08-16 | 2016-08-16 | Voltage Cable Lines Construction GIS terminal shelf depreciation field calibration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610679366.5A CN106054098B (en) | 2016-08-16 | 2016-08-16 | Voltage Cable Lines Construction GIS terminal shelf depreciation field calibration method |
Publications (2)
| Publication Number | Publication Date |
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| CN106054098A true CN106054098A (en) | 2016-10-26 |
| CN106054098B CN106054098B (en) | 2019-01-15 |
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| CN201610679366.5A Active CN106054098B (en) | 2016-08-16 | 2016-08-16 | Voltage Cable Lines Construction GIS terminal shelf depreciation field calibration method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110196402A (en) * | 2019-07-05 | 2019-09-03 | 杭州西湖电子研究所 | A kind of method of multi-point calibration shelf depreciation Apparent discharge magnitude |
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| CN106054098B (en) | 2019-01-15 |
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