CN104020363B - Measuring method of three-dimensional measuring device of charges on surface of basin-type insulator - Google Patents
Measuring method of three-dimensional measuring device of charges on surface of basin-type insulator Download PDFInfo
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- CN104020363B CN104020363B CN201410242953.9A CN201410242953A CN104020363B CN 104020363 B CN104020363 B CN 104020363B CN 201410242953 A CN201410242953 A CN 201410242953A CN 104020363 B CN104020363 B CN 104020363B
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Abstract
The invention belongs to the technical field of high-voltage equipment and electrostatic measuring, and discloses a three-dimensional measuring device and method of charges on the surface of a basin-type insulator. The device comprises an arc surface and inclined surface measuring probe, a probe support guide rail, a probe radial motion control mechanism, a link mechanism, a 360-degree rotation control disk, a reading mechanism, a lifting control lead screw, a control mechanism, a sealed through-connection cavity, a main shaft for controlling motion, a coupler and an operation platform base. The whole set of mechanisms is in sealed connection with a GIS testing cavity. The three-dimensional measuring device can realize three-dimensional control over charge measuring on the surface of the actual basin-type insulator; air impermeability of a testing device is guaranteed, therefore, the purpose that all-direction and totally-radial three-dimensional measuring is conducted on the charges on the surface of the basin-type insulator in voltage equipment or high-air-pressure environment is realized, and high charge resolution and spatial resolution is achieved in measuring the surfaces of various basin-type insulators. Meanwhile, the three-dimensional measuring device and method can be used for environments with high requirements for air impermeability and the measuring process can be observed.
Description
Technical field
The invention belongs to high voltage and insulation measurement technical field, three-dimensional particularly to a kind of disc insulator surface charge
Measurement apparatus and method.
Background technology
Gas insulated combined electrical equipment (gis) has that dielectric strength is high, audible noise is low, no fire hazard, time between overhauls(TBO) length,
Save floor occupying area and the advantage such as maintenance is few, be increasingly becoming the representative of modern substation equipment, be low-maintenance, even exempt to tie up
Shield, high reliability, the symbol of high security.
At present adopting gas-insulated switchgear device the built or newly-built 330kv and 500kv transformer station of China more.However,
Raising with gis electric pressure and input coefficient run increasing of number of units, and the internal fault of gis equipment also increases therewith.Greatly
Quantity research shows, when insulator surface has gathered substantial amounts of electric charge, the electric field that these electric charges will change insulator surface divides
Cloth, if accumulating electric charge always in the dielectric surface long period, can make edge flashing voltage decline, the even meeting of some occasions
Reduce 30% about, therefore surface Charge is to cause insulator edge flashing, lead to the weight that gis operational reliability reduces
Want factor.Because Chinese scholars shortage is ground to disc insulator surface charge accumulation characteristic in actual 252kvgis before
Study carefully, the object studied is most of to be spool insulator or insulation film, and the result of gained may not reflect reality exactly
The distribution situation of border operating gis disc insulator surface charge is it is therefore necessary to actual 252kvgis disc insulator
Surface charge accumulation characteristic is studied.
The measurement of surface Charge belongs to the category of electrostatic measurement it is impossible to be measured with traditional electrical instrument.
At present, the measuring method of surface charge mainly includes dust figure method, and the measuring method based on pockels effect and electrostatic are visited
Head method.Dust figure method is initially proposed in 1778 by lichtenberg, and its principle is using some powered colored solid (such as
The pb3o4 of the redness of positively charged, the s of electronegative white yellow), with the electric charge of insulator surface, adsorption effect can occur, such as
Negative electrical charge can adsorb the pb3o4 of positively charged, and positive charge can adsorb electronegative s.When these special pressed powders are sprayed at
During dielectric surface, can be judged according to the distribution of color of these pressed powders of dielectric surface dielectric surface charge polarity and
Distribution of charges.Its advantage is convenient, directly perceived, and shortcoming is to be unable to quantitatively characterizing surface charge, and during spraying dust, can
The distribution of charges of dielectric surface can be changed.Pockels effect measuring method is linear electro-optic effect method, right for not having
For the crystal at title center, Dang Qichu in the electric field when, its refractive index change proportional with added electric-field intensity,
That is, obviously rendered when electric field is less strong, thus can be by measuring the change of crystal refractive index under electric field action
Change and to reflect the change of electric field, but the method is only applicable to transparent membrane, and the disc insulator surface of solids is not appropriate for.
Electrostatic probe method is using wide method in current surface charge measurement field in the world at present.Electrostatic is popped one's head in
Mainly it is made up of induced inside conductor, internal support insulator and external ground screen layer.Surface Charge is surveyed
During amount, by probe vertical in testing medium surface and constant distance, surface Charge can excite sensing on sensor conductor
Voltage, can measure to output induced voltage.Although the surface charge of dielectric is accurately measured, using tradition
Scale Method can there is error, but, when the regularity of distribution and the influence factor of simply investigating surface charge, under different condition
Experimental result when carrying out lateral comparison, it is feasible for calculating surface Charge using traditional lineal scale method.
In sum, for solid insulation surface, conventional measuring method is electrostatic capacitance probe method, but due to basin
Formula insulator surface is complex-shaped, and is generally filled with the sf6 gas of 4-5 atmospheric pressure inside gis, and electrostatic probe is right
Disc insulator surface charge measures more complicated it is therefore necessary to measure surface Charge according to electrostatic capacitance method
Principle, develop a set of device that can be used for actual 252kvgis disc insulator surface charge measurement.
Content of the invention
It is an object of the invention to provide a kind of disc insulator surface charge three-dimensional measuring apparatus and method, this device includes
Cambered surface as electrostatic measurement probe and inclined-plane measuring probe, probe bracket guide rail, probe radial motion controlling organization, connecting rod machine
Structure, 360 degree of rotation control panels, reading mechanism, liftings control leading screw and controlling organization, sealing adaptor cavity, control the master moving
Axle, shaft coupling and operating platform base, and sleeve mechanism is tightly connected with gis test cavity；It is characterized in that, gis tests
Cavity covers on disc insulator basin side, and cambered surface measuring probe is fixed on cambered surface measuring probe support guide lower end, and inclined-plane measures
Probe is fixed on inclined-plane measuring probe support guide lower end；Cambered surface measuring probe support guide and inclined-plane measuring probe support guide
Upper end be symmetrically fixed on the conical support outside including the main shaft of interior axle and outer shaft, with main shaft rotation；Taper outside main shaft
Bidirectional rotation controller is coaxially fixed with main shaft, linkage connects bidirectional rotation controller and two measuring probes below support
Support guide, main shaft upper end is fixed on gis test cavity end face center, and gis test cavity is fixed on by sealing adaptor cavity
On operating platform base；Probe radial motion controlling organization is fixed with operating platform base；Probe radial motion controlling organization side
360 degree of rotation control mechanisms and probe movement reading mechanism are arranged in face；In probe radial motion controlling organization end face center is fixing
Outer shaft shaft coupling and lifting control leading screw, and lifting control leading screw is passed through feed screw nut and is connected with lifting controlling organization；Interior outer shaft connection
Axial organ is connected with main shaft.
Described probe radial motion controlling organization top surface setting patchboard, rear end metering computer is connected on patchboard,
Nanovoltmeter and rear end metering computer connect.
Described 360 degree of rotation control mechanisms are engaged with main shaft by the control gear of main shaft, control main shaft to carry out 360 degree of rotations
Turn.
Described probe radial motion controlling organization, by engaging with the control gear of main shaft, controls two probes on guide rail
Mobile, and mobile location information is shown in probe movement reading mechanism.
Described linkage and bidirectional rotation controller, by being engaged with the control gear of main shaft, are worked in coordination and are realized inclined-plane
Probe and the alternately control of cambered surface probe.
Described lifting controls the cooperation by feed screw nut for the leading screw, fixes with the interior axle of main shaft, controls the lifting of main shaft.
The invention has the beneficial effects as follows the disc insulator surface charge three-dimensional measuring apparatus proposing have the advantage that
1st, measurement apparatus can carry out surface charge measurement to actual 252kvgis disc insulator, ensure that experimental rig
Air-tightness, by wiring ring flange, power supply and measurement signal line are drawn, and when not measuring electric charge, mechanism integrally rise
Rise, the field strength distribution in cavity when the equipment that can not affect normally runs, therefore thus realizing in high voltage installation and hyperbar ring
In border, full angle is carried out to disc insulator surface charge, overall diameter to three-dimensional measurement.
2nd, three-dimensional operating-controlling mechanism, it is possible to achieve measuring probe is lifted, rotation, the motion of three kinds of dimensions of creeping, and only leads to
Cross to provide for simple replacement of probe bracket guide rail and can achieve and charge measurement is carried out to arbitrary shape insulator surface, there is higher electricity
Lotus resolution ratio and spatial resolution.
3rd, probe is constant with the holding of the distance between tested insulating part surface, by probe bracket guide rail and lifting control machine
Structure, this device can remain that probe is vertical to disc insulator surface point and apart from constant in the measurements, and moving back
Impact will not be produced during dynamic, thereby ensure that the reliability accuracy of test measurement.
4th, measuring mechanism can manual control it is ensured that need measured zone or measurement request under carry out insulator surface electricity
Lotus measures.
Brief description
Fig. 1 is disc insulator surface charge three-dimensional measuring apparatus overall structure diagram.
Fig. 2 is the a-a view of Fig. 1.
Specific embodiment
The invention provides a kind of disc insulator surface charge three-dimensional measuring apparatus and method.With reference to embodiment pair
Invention is described in further detail.
Disc insulator surface charge three-dimensional measuring apparatus proposed by the present invention, as shown in Figure 1, 2, gis tests its structure
Cavity 7 covers on disc insulator 21 basin side, as electrostatic measurement probe cambered surface measuring probe 1 and 3 points of inclined-plane measuring probe
It is not fixed on cambered surface measuring probe support guide 2 lower end and inclined-plane measuring probe support guide 4 lower end；Cambered surface measuring probe support
The upper end of guide rail 2 and inclined-plane measuring probe support guide 4 is symmetrically fixed on the conical support outside including the main shaft 8 of interior axle and outer shaft
On, rotate with main shaft 8；It is coaxially to fix bidirectional rotation controller 5 and main shaft with main shaft 8 below the conical support outside main shaft 8
Radial direction control cluster parachute gear 8.2, linkage 6 connects bidirectional rotation controller 5 and two measuring probe support guides, connecting rod
Mechanism 6 and bidirectional rotation controller 5, by controlling cluster parachute gear 8.2 to engage with the radial direction of main shaft, are worked in coordination and are realized inclined-plane spy
Head and the alternately control of cambered surface probe；Main shaft 8 upper end is fixed on gis test cavity 7 end face center, and gis test cavity 7 passes through close
Envelope switching cavity 9 is fixed on operating platform base 11；Probe radial motion controlling organization 12 is fixing with operating platform base 11；
Probe radial motion controlling organization 360 degree of rotation control mechanisms 10 of 12 side arrangement and probe movement reading mechanism 13；360 degree of rotations
Turn controlling organization 10 to engage with main shaft 8 by mainshaft gear, control main shaft 8 to carry out 360 degree of rotations.Probe radial motion control machine
In structure 12 end face center is fixing, outer shaft shaft coupling 14 and lifting control leading screw 15, lifting control leading screw 15 pass through feed screw nut 16 with
Lifting controlling organization 17 connects；And by the cooperation of feed screw nut 16, fix with the interior axle of main shaft 8, control the lifting of main shaft 8；
Interior outer shaft shaft coupling 14 is connected with main shaft 8.Probe radial motion controlling organization 12, by being engaged with the control gear of main shaft, is controlled
Two probes move on guide rail, and mobile location information is shown in probe movement reading mechanism 13.
Described probe radial motion controlling organization 12 top surface setting patchboard 18, rear end metering computer 20 is connected to wiring
On disk 18, nanovoltmeter 19 and rear end metering computer 20 connect；Patchboard 18 is realized being interlinked to the outside in power supply and holding wire, it is possible to provide
Power supply and output measurement signal.
The three-dimensional surface charge detecting device of the present invention, by electrostatic measurement probe measurement corresponding position voltage signal,
It is converted into data signal in transmission line input nanovoltmeter, then pc is machine-readable to take record measurement data by interconnecting.
Away from insulator surface 2mm during the measurement apparatus electrostatic measurement probe measurement of the present invention,；Described nanovoltmeter adopts
The multi-functional nanovoltmeter of keithley2182a, it is possible to provide 1nv certainty of measurement.
Concrete measuring process is as follows:
1st, after test pressurization finishes, 360 ° of rotation control mechanisms 10 are returned to zero point, will using lifting controlling organization 17
Three-dimensional operating-controlling mechanism falls, and makes rotation on main shaft 8 control gear 8.1 to engage with rotation control mechanism.
2nd, three-dimensional operating-controlling mechanism continues to fall makes radially to control cluster parachute gear 8.2 to control with probe radial motion on main shaft 8
Mechanism engages, and when reaching at the scale of 2mm position, fixes lifting controlling organization 17 and 360 ° of rotation control mechanisms 10, makes electrostatic
Measuring probe carries out apart from insulator 2mm and at 0 radial direction measurement.
3rd, start bidirectional rotation device 5 during radial motion measurement, during inclined-plane measurement, probe radial motion controlling organization 12 is pressed suitable
Hour hands rotate, by (the direction of rotation of the bidirectional rotation device 5 direction of rotation phase actual with main shaft interior axle counterclockwise during cambered surface measurement
Instead).In cambered surface measuring probe 1 and inclined-plane measuring probe 3 motion process, by the rotation of main shaft interior axle, 360 ° is a cycle；Work as master
When axle interior axle rotates clockwise 0-180 °, cambered surface measuring probe 1 moves along cambered surface 0-30mm；When main shaft interior axle presses counterclockwise rotation
When turning 0-180 °, inclined-plane measuring probe 3 moves along inclined-plane 0-60mm.When main shaft interior axle turns 360 °, cambered surface measuring probe 1 and tiltedly
Planar survey probe 3 is returned to zero point, returns fully to after zero point after operating-controlling mechanism, carries out the rotary motion of integrated model.
4th, unclamp lifting controlling organization 17, fixed screw, rotate lifting controlling organization 17, controlling organization lifting will be lifted,
Treat radially to control cluster parachute gear 8.2 separately, but when the gear of 360 ° of rotation control mechanisms still fastens intact, unclamp rotation control
Fixed screw, a certain angle of 360 ° of rotation control mechanisms 10 of rotation to angle position to be measured, then repeat 2-4 step, until
Measurement terminates.
5th, after measurement finishes, now probe movement reading mechanism 13 has been returned to zero point, and integrated model is risen to completely
Top, can continue applied voltage test.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, institute
Any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (1)
1. a kind of surface charge method for three-dimensional measurement of disc insulator surface charge three-dimensional measuring apparatus, this disc insulator table
Surface charge three-dimensional measuring apparatus include cambered surface and inclined-plane measuring probe, probe bracket guide rail, probe as electrostatic measurement probe
Radial motion controlling organization, linkage, 360 degree of rotation control panels, reading mechanism, lifting control leading screw and controlling organization, close
Main shaft, shaft coupling and the operating platform base seal switching cavity, controlling motion, and sleeve mechanism is tested cavity sealing with gis
Connect；It is characterized in that, concrete measuring process is as follows:
1), after test pressurization finishes, 360 ° of rotation control mechanisms (10) are returned to zero point, will using lifting controlling organization (17)
Three-dimensional operating-controlling mechanism falls, and makes the upper rotation of main shaft (8) control gear (8.1) to engage with rotation control mechanism；
2) three-dimensional operating-controlling mechanism continues to fall makes upper radially control cluster parachute gear (8.2) of main shaft (8) control with probe radial motion
Mechanism engages, and when reaching at the scale of 2mm position, fixes lifting controlling organization (17) and 360 ° of rotation control mechanisms (10), makes
Electrostatic measurement probe distance insulator 2mm simultaneously carries out radial direction measurement at 0；
3) start bidirectional rotation device (5) during radial motion measurement, during inclined-plane measurement, probe radial motion controlling organization (12) is pressed suitable
Hour hands rotate, and press rotate counterclockwise, the direction of rotation of bidirectional rotation device (5) the rotation side actual with main shaft interior axle during cambered surface measurement
To contrary；In cambered surface measuring probe (1) and inclined-plane measuring probe (3) motion process, by the rotation of main shaft interior axle, 360 ° is one week
Phase；When main shaft interior axle rotates clockwise 0-180 °, cambered surface measuring probe (1) moves along cambered surface 0-30mm；When main shaft interior axle
During by rotate counterclockwise 0-180 °, inclined-plane measuring probe (3) moves along inclined-plane 0-60mm；When main shaft interior axle turns 360 °, cambered surface
Measuring probe (1) and inclined-plane measuring probe (3) are returned to zero point, return fully to after zero point after operating-controlling mechanism, carry out overall rotation
The rotary motion of rotation mechanism；
4) unclamp lifting controlling organization (17), fixed screw, rotate lifting controlling organization (17), controlling organization lifting will be lifted,
Treat radially to control cluster parachute gear (8.2) separately, but when the gear of 360 ° of rotation control mechanisms still fastens intact, unclamp rotation control
Fixed screw processed, a certain angle of 360 ° of rotation control mechanisms (10) of rotation, to angle position to be measured, then repeats 2-4 step
Suddenly, until measurement terminates；
5), after measurement finishes, now probe movement reading mechanism (13) has been returned to zero point, and integral-rotation mechanism is lifted completely
To top, applied voltage test can be continued.
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| CN201410242953.9A CN104020363B (en) | 2014-06-03 | 2014-06-03 | Measuring method of three-dimensional measuring device of charges on surface of basin-type insulator |
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| CN201410242953.9A CN104020363B (en) | 2014-06-03 | 2014-06-03 | Measuring method of three-dimensional measuring device of charges on surface of basin-type insulator |
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| CN104020363B true CN104020363B (en) | 2017-01-18 |
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