CN105093073B - A kind of method of testing of generator manually wound insulation above earth potential - Google Patents
A kind of method of testing of generator manually wound insulation above earth potential Download PDFInfo
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- CN105093073B CN105093073B CN201410223727.6A CN201410223727A CN105093073B CN 105093073 B CN105093073 B CN 105093073B CN 201410223727 A CN201410223727 A CN 201410223727A CN 105093073 B CN105093073 B CN 105093073B
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- voltage
- manually wound
- wound insulation
- connection conductor
- earth potential
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Abstract
The invention provides a kind of generator manually wound insulation above earth potential method of testing based on generator manually wound insulation above earth potential test device, this method includes：S1. generator unit stator manually wound insulation end is wrapped up with tinfoil；S2., sharp-point conductor, test generator unit stator manually wound insulation end above earth potential are installed on the connection conductor of the high-voltage isulation supporting bar top；S3. generator unit stator manually wound insulation end above earth potential is judged whether in default scope, if in default scope, performing S4；Otherwise, the spherical voltage sensor is installed on the connection conductor of the high-voltage isulation supporting bar top or cylindric voltage sensor carries out localization of fault；S4. in the connection conductor upper mounting plate shape voltage sensor of the high-voltage isulation supporting bar top, test involute part manually wound insulation above earth potential.The present invention solves the problem of existing measuring technology can not be tested end involute part manually wound insulation above earth potential.
Description
Technical field
The present invention relates to technical field of electricity, and in particular to a kind of method of testing of generator manually wound insulation above earth potential.
Background technology
Generator is one of visual plant in power network, and its safe operation is related to the safety of whole power network.To generator
It is to detect the Insulation test side of manually wound insulation defect that manually wound insulation, which will carry out moving measuring technology outside above earth potential test, existing current potential,
Method, by the density and opposing insulation intensity that detect end manually wound insulation.It can make up equipment AC and DC pressure test institute
The deficiency for the overhang insulation defect that can't find；It can be found that lead bag defective insulation, coil nose insulating wrapping defect, insulation
The filling of box filled mud is discontented, and colligation washs glass rope and solidifies that stator hollow copper wire welding quality at bad and end-fitting is bad to be caused
The defects such as infiltration.But existing method of testing can not be surveyed mainly for manually wound insulation defect for end involute part
, there is testing blind zone in examination.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of method of testing of generator manually wound insulation above earth potential, solution
The problem of existing measuring technology of having determined can not be tested end involute part manually wound insulation above earth potential.
To achieve the above object, the present invention is achieved by the following technical programs：
A kind of test of the generator manually wound insulation above earth potential based on generator manually wound insulation above earth potential test device
Method, connection conductor, high-voltage isulation support bar, measuring resistance, the voltage that described device includes high-voltage isulation supporting bar top is surveyed
Measuring resistance is installed in quantity display apparatus and earthed system, the high-voltage isulation support bar；One end of the measuring resistance with
High-voltage isulation support bar is electrically connected by metallic conductor, and the other end is electrically connected with voltage measurement display device by metallic conductor；
The voltage measurement display device, high-voltage isulation support bar bottom are connected with earthed system；Detachable electrical pressure sensor passes through height
The connection conductor on pressure insulating support rod top is connected with high-voltage isulation support bar；The detachable electrical pressure sensor is tabular voltage
One kind in sensor, spherical voltage sensor and cylindric voltage sensor, this method includes：
S1. generator unit stator manually wound insulation end, including stator coil manually wound insulation end, High voltage output are wrapped up with tinfoil
Hold manually wound insulation end and neutral terminal manually wound insulation end；
S2. dismounting is connected to the detachable electrical pressure sensor on the connection conductor of the high-voltage isulation supporting bar top, and
Sharp-point conductor, test generator unit stator manually wound insulation end pair are installed on the connection conductor of the high-voltage isulation supporting bar top
Ground potential；
S3. generator unit stator manually wound insulation end above earth potential is judged whether in default scope, if in default model
In enclosing, S4 is performed；Otherwise, remove and install the high-voltage isulation supporting bar top connection conductor on sharp-point conductor, and
The spherical voltage sensor is installed on the connection conductor of the high-voltage isulation supporting bar top or cylindric voltage sensor enters
Row localization of fault；
S4. the sharp-point conductor on the connection conductor of the high-voltage isulation supporting bar top is removed and installed, and in the height
The connection conductor upper mounting plate shape voltage sensor on insulating support rod top is pressed, test involute part manually wound insulation is electric over the ground
Position；
S5. involute part manually wound insulation above earth potential is judged whether in default scope, if in default scope,
Terminate test；Otherwise, the tabular voltage sensor on the connection conductor of the high-voltage isulation supporting bar top is removed and installed, and
Spherical voltage sensor is installed on the connection conductor of the high-voltage isulation supporting bar top or cylindric voltage sensor is carried out
Localization of fault.
Wherein, install spherical on the connection conductor of the high-voltage isulation supporting bar top in the step S3 or step S5
Voltage sensor or cylindric voltage sensor, which carry out localization of fault, to be included：
Various sizes of spherical voltage sensor or circle are installed on the connection conductor of the high-voltage isulation supporting bar top
Column voltage sensor is repeatedly tested, and is accurately positioned trouble point.
Wherein, the resistance of the detachable electrical pressure sensor is less than the resistance of the measuring resistance.
Wherein, the resistance of the measuring resistance is 100M Ω.
The present invention at least has following beneficial effect：
The method of the invention can be simply straight in production scene using generator manually wound insulation above earth potential test device
Ground connection is tested generator unit stator manually wound insulation above earth potential, and not only end involute part can be tested, also
Trouble point can be accurately positioned.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is the method flow diagram tested generator manually wound insulation above earth potential in the embodiment of the present invention；
Fig. 2 be generator manually wound insulation above earth potential is tested in the embodiment of the present invention used in test device
Structural representation；
Fig. 3 is the schematic diagram tested generator manually wound insulation above earth potential in the embodiment of the present invention；
Fig. 4 is tabular voltage sensor structural representation in the embodiment of the present invention；
Fig. 5 is spherical voltage sensor structural representation in the embodiment of the present invention；
Fig. 6 is cylindric voltage sensor structural representation in the embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, clear, complete description is carried out to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Referring to Fig. 1 and Fig. 2, the embodiment of the present invention proposes a kind of based on generator manually wound insulation above earth potential test device
Generator manually wound insulation above earth potential method of testing, it is the connection conductor 2 of described device including high-voltage isulation supporting bar top, high
Press in insulating support rod 3, measuring resistance 4, voltage measurement display device 5 and earthed system 6, the high-voltage isulation support bar 3 and pacify
Equipped with measuring resistance 4；One end of the measuring resistance 4 is electrically connected with high-voltage isulation support bar 3 by metallic conductor, the other end with
Voltage measurement display device 5 is electrically connected by metallic conductor；The voltage measurement display device 5, the bottom of high-voltage isulation support bar 3
It is connected with earthed system 6；Connection conductor 2 and high-voltage isulation of the detachable electrical pressure sensor 1 by the top of high-voltage isulation support bar 3
Support bar 3 is connected；The detachable electrical pressure sensor 1 is tabular voltage sensor, spherical voltage sensor and cylindric voltage
One kind in sensor, this method comprises the following steps：
Step 101：It is high with tinfoil parcel generator unit stator manually wound insulation end, including stator coil manually wound insulation end
Press output end manually wound insulation end and neutral terminal manually wound insulation end.
Step 102：Dismounting is connected to the removable voltage sensor on the connection conductor of the high-voltage isulation supporting bar top
Device, and sharp-point conductor is installed on the connection conductor of the high-voltage isulation supporting bar top, test generator unit stator manually wound insulation
End above earth potential.
Step 103：Generator unit stator manually wound insulation end above earth potential is judged whether in default scope, if default
In the range of, perform step 104；Otherwise, the tip on the connection conductor of the high-voltage isulation supporting bar top is removed and installed
Conductor, and the spherical voltage sensor or cylindric voltage are installed on the connection conductor of the high-voltage isulation supporting bar top
Sensor carries out localization of fault.Wherein, above earth potential preset range is 0 to 2000V.
Step 104：The sharp-point conductor on the connection conductor of the high-voltage isulation supporting bar top is removed and installed, and in institute
The connection conductor upper mounting plate shape voltage sensor of high-voltage isulation supporting bar top is stated, test involute part manually wound insulation is over the ground
Current potential.
In this step, according to electricity generator stator coil involute part installation situation, such as distance between manually wound insulation, dredge
The information such as close, length, can also select to install spherical voltage biography on the connection conductor in the high-voltage isulation supporting bar top
Sensor or cylindric voltage sensor carry out the test of involute part manually wound insulation above earth potential.
Step 105：Involute part manually wound insulation above earth potential is judged whether in default scope, if in default model
In enclosing, step 106 is performed；Otherwise, the tabular voltage on the connection conductor of the high-voltage isulation supporting bar top is removed and installed
Sensor, and spherical voltage sensor is installed on the connection conductor of the high-voltage isulation supporting bar top or cylindric voltage is passed
Sensor carries out localization of fault.Wherein, above earth potential preset range is 0 to 2000V.
In this step, involute part manually wound insulation above earth potential is judged whether in default scope, if default
In the range of, then remaining involute part manually wound insulation above earth potential measurement is carried out until terminating test.
Step 106：Remaining involute part manually wound insulation above earth potential measurement is carried out until terminating test.
Wherein, ball is installed on the connection conductor of the high-voltage isulation supporting bar top in the step 103 or step 105
Shape voltage sensor or cylindric voltage sensor, which carry out localization of fault, to be included：
Various sizes of spherical voltage sensor or circle are installed on the connection conductor of the high-voltage isulation supporting bar top
Column voltage sensor is repeatedly tested, and is accurately positioned trouble point.
Wherein, the detachable electrical pressure sensor is the voltage sensor made using flexible conducting material, and the material is expired
Sufficient condition：First, resistance value is small, the voltage sensor resistance very little made relative to the resistance of the measuring resistance, the material,
Almost can be ignored, secondary sexual character is variable, when sensor is extruded by external force, its character can occur respective change with
The detection under the conditions of different spaces is adapted to, and too big change will not occur for resistance.Wherein, the resistance of the measuring resistance can be
100MΩ.The detachable electrical pressure sensor includes tabular, spherical and cylindric, to adapt to measure electricity generator stator coil handbag
The requirement that the different parts above earth potential that insulate is measured.
The other end of the connection conductor of high-voltage isulation supporting bar top described in the embodiment of the present invention in device is provided with spiral shell
Pit, is connected by bolt with detachable electrical pressure sensor.High-voltage isulation support bar bottom in described device passes through grounding copper
Line is connected with earthed system.
The detection principle diagram of the embodiment of the present invention is as shown in figure 3, including manually wound insulation resistance 11, measuring resistance 22, milliampere
Table 33, sound-producing device 44 and earthed system 55.Wherein manually wound insulation resistance 11 is electricity generator stator coil manually wound insulation equivalent electric
Resistance, such as manually wound insulation are good, and its resistance is much larger than the resistance of measuring resistance 22；If manually wound insulation punctures or defective, its resistance
Decline with measuring resistance 22 with the order of magnitude even far smaller than measuring resistance 22.Moved partially and generating means according to the pointer of milliammeter
Whether sounding judges whether manually wound insulation is good together.
The structure of tabular voltage sensor, spherical voltage sensor and cylindric voltage sensor described in the embodiment of the present invention is such as
Shown in Fig. 4,5,6.
As shown in figure 4, for a kind of tabular voltage sensor, including removable compliant conductive plate 1a, metal connecting piece
2a and fixture 3a, wherein, metal connecting piece 2a one end is electrically connected by fixture 3a with compliant conductive plate 1；
When the removable compliant conductive plate 1a is squeezed, respective change can occur for its shape；
When the removable compliant conductive plate 1a is squeezed, the resistance of tabular sensor is maintained at 0.1~50 Europe
In Standard resistance range, resistance relative standard resistance can be neglected, thus not interfere with overall test result, but lead flexibility
The making of electroplax is easier, the requirement reduction to material.
Wherein, the other end of the metal connecting piece 2a is connected by screw thread 4a using bolt with other outside devices.
In the present embodiment, the metal connecting piece 2a other end is led by screw thread 4a using the connection of bolt and high-voltage isulation supporting bar top
Body phase connects.
Wherein, the thickness of the removable compliant conductive plate is in the range of 0.1cm~1cm.
Sensor when thickness can meet different space between different generator end manually wound insulations but measurement in the range of this
Only measure and specify manually wound insulation without the requirement that makes to concatenate between manually wound insulation
Wherein, the width of the removable compliant conductive plate is in the range of 2cm~10cm.
Width can meet different generator end manually wound insulation measurement requests of different shapes and measurement in the range of this
Area requirement.
Wherein, the length of the removable compliant conductive plate is in the range of 5cm~20cm.
Length can meet different generator end manually wound insulation measurement requests of different shapes and measurement in the range of this
Area requirement, while meeting the requirement that depth is measured between the manually wound insulation of end.
In actual test, according to test needs, the tabular voltage sensor can be adjusted flexibly its parameter, for example may be used
To change one or more parameters in its length, width or thickness as needed.Such as to accurate measurement involute over the ground
Current potential, then need constantly to change its thickness so that it is properer that it is contacted, so as to be readily available accurate measurement result.
It is a kind of spherical voltage sensor referring to Fig. 5, including removable compliant conductive ball 1b, bearing 2b, connection frame
Frame 3b, fixture 4b and metal connecting piece 5b, wherein, bearing 2b is electrically connected after passing through compliant conductive ball 1b with connection framework 3b,
Metal connecting piece 5b one end is electrically connected by fixture 4b with connection framework 3b；
When the removable compliant conductive ball is squeezed, respective change can occur for its shape；
When the removable compliant conductive ball is squeezed, the resistance of spherical sensor is maintained at the resistance in 0.1~50 Europe
In the range of value.
Wherein, the other end of the metal connecting piece 5b is connected by screw thread 6b using bolt with other outside devices.
In the present embodiment, the metal connecting piece 5b other end is led by screw thread 6b using the connection of bolt and high-voltage isulation supporting bar top
Body phase connects.
Wherein, the diameter of the removable compliant conductive ball is in the range of 1cm~10cm.
Sensor is only when diameter can meet different space between different generator end manually wound insulations but measurement in the range of this
Measurement specifies manually wound insulation without the requirement that makes to concatenate between manually wound insulation, while can meet different generator ends in the range of this
Portion's manually wound insulation measurement request of different shapes and measurement range requirement.
In actual test, according to test needs, the spherical voltage sensor can be adjusted flexibly its parameter, for example may be used
To change its diameter as needed, to meet the requirement of different test environments.Such as to the accurate localization of faults, it is necessary to constantly
Change its diameter so that its contact range is smaller, so as to obtain accurate position of failure point.
It is a kind of cylindric voltage sensor referring to Fig. 6, including removable compliant conductive cylinder 1c, bearing 2c, even
Framework 3c, fixture 4c and metal connecting piece 5c are met, wherein, bearing 2c passes through electric with connection framework 3c after compliant conductive cylinder 1c
Connection, metal connecting piece 5c one end is electrically connected by fixture 4c with connection framework 3c；
When the removable compliant conductive cylinder is squeezed, respective change can occur for its shape；
When the removable compliant conductive cylinder is squeezed, the resistance of cylindric sensor is maintained at 0.1~50 Europe
Standard resistance range in.
Wherein, the other end of the metal connecting piece is connected by screw thread 6c using bolt with other outside devices.
Wherein, the diameter of the removable compliant conductive cylinder is in the range of 1cm~10cm.
Sensor is only when diameter can meet different space between different generator end manually wound insulations but measurement in the range of this
Measurement specifies manually wound insulation without the requirement that makes to concatenate between manually wound insulation, while can meet different generator ends in the range of this
Portion's manually wound insulation measurement request of different shapes and measurement range requirement.
Wherein, the height of the removable compliant conductive cylinder is in the range of 5cm~20cm.
Height can meet different generator end manually wound insulation measurement requests of different shapes and measurement in the range of this
Area requirement, while meeting the requirement that depth is measured between the manually wound insulation of end.
In actual test, according to test needs, its parameter can be adjusted flexibly in the cylindric voltage sensor, for example
One or both of its diameter and height can be changed as needed, such as determine abort situation, it is necessary to constantly to accurate
Change its diameter so that its contact range is smaller, so as to obtain accurate abort situation.
Methods described of the embodiment of the present invention can be using generator manually wound insulation above earth potential test device in production scene
Simply directly generator unit stator manually wound insulation above earth potential is tested, end involute part can not only be surveyed
Examination, can also be accurately positioned trouble point.
Above example only illustrates technical scheme, rather than its limitations；Although with reference to the foregoing embodiments to this
Invention is described in detail, it will be understood by those within the art that：It still can be to foregoing embodiments institute
The technical scheme of record is modified, or carries out equivalent substitution to which part technical characteristic；And these modifications or substitutions, and
The essence of appropriate technical solution is not set to depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (4)
1. a kind of test side of the generator manually wound insulation above earth potential based on generator manually wound insulation above earth potential test device
Method, connection conductor of the described device including high-voltage isulation supporting bar top, high-voltage isulation support bar, measuring resistance, voltage measurement
Measuring resistance is installed in display device and earthed system, the high-voltage isulation support bar；One end of the measuring resistance and height
Pressure insulating support rod is electrically connected by metallic conductor, and the other end is electrically connected with voltage measurement display device by metallic conductor；Institute
Voltage measurement display device, high-voltage isulation support bar bottom is stated with earthed system to be connected；Detachable electrical pressure sensor passes through high pressure
The connection conductor on insulating support rod top is connected with high-voltage isulation support bar；The detachable electrical pressure sensor passes for tabular voltage
One kind in sensor, spherical voltage sensor and cylindric voltage sensor, it is characterised in that this method includes：
S1. generator unit stator manually wound insulation end, including stator coil manually wound insulation end, high-voltage output end hand are wrapped up with tinfoil
Bag insulated end portions and neutral terminal manually wound insulation end；
S2. dismounting is connected to the detachable electrical pressure sensor on the connection conductor of the high-voltage isulation supporting bar top, and in institute
State and sharp-point conductor is installed on the connection conductor of high-voltage isulation supporting bar top, test generator unit stator manually wound insulation end is electric over the ground
Position；
S3. generator unit stator manually wound insulation end above earth potential is judged whether in default scope, if in default scope,
Perform S4；Otherwise, the sharp-point conductor on the connection conductor of the high-voltage isulation supporting bar top is removed and installed, and in the height
The spherical voltage sensor is installed on the connection conductor on pressure insulating support rod top or cylindric voltage sensor carries out failure
Point location；
S4. the sharp-point conductor on the connection conductor of the high-voltage isulation supporting bar top is removed and installed, and it is exhausted in the high pressure
The connection conductor upper mounting plate shape voltage sensor of edge supporting bar top, test involute part manually wound insulation above earth potential；
S5. involute part manually wound insulation above earth potential is judged whether in default scope, if in default scope, terminating
Test；Otherwise, the tabular voltage sensor on the connection conductor of the high-voltage isulation supporting bar top is removed and installed, and in institute
State and spherical voltage sensor or cylindric voltage sensor progress failure are installed on the connection conductor of high-voltage isulation supporting bar top
Point location.
2. according to the method described in claim 1, it is characterised in that in the high-voltage isulation branch in the step S3 or step S5
Spherical voltage sensor is installed on the connection conductor on strut top or cylindric voltage sensor carries out localization of fault and included：
Various sizes of spherical voltage sensor or cylindric is installed on the connection conductor of the high-voltage isulation supporting bar top
Voltage sensor is repeatedly tested, and is accurately positioned trouble point.
3. according to the method described in claim 1, it is characterised in that the resistance of the detachable electrical pressure sensor is less than the mark
The resistance of quasi- resistance.
4. according to the method described in claim 1, it is characterised in that the resistance of the measuring resistance is 100M Ω.
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| CN105093073B true CN105093073B (en) | 2017-08-29 |
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