CN100580458C - Voltage check device for gas insulation apparatus - Google Patents
Voltage check device for gas insulation apparatus Download PDFInfo
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- CN100580458C CN100580458C CN 200610077816 CN200610077816A CN100580458C CN 100580458 C CN100580458 C CN 100580458C CN 200610077816 CN200610077816 CN 200610077816 CN 200610077816 A CN200610077816 A CN 200610077816A CN 100580458 C CN100580458 C CN 100580458C
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/0356—Mounting of monitoring devices, e.g. current transformers
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Abstract
This invention posts a voltage detection device which can reduce the voltage shares ratio of the lower voltage of middle electrode in the voltage detection of air isolation device and prevent the overvoltage in order to avoid isolation attaint. The device is applied to the earth metal container 1 and the first capacitor which is composed with the middle electrode 3 coaxially cylindrical disposed, formed with the electrode which has specific distance with the generatrix 2, and the earth metal container 1 and the second capacitor 10 applied to voltage detection. By throwing the partial voltage between the mentioned first and second capacitor to the sensor 12 you can detect the voltage of generatrix 2. Further more, the ring sustained conductor 31 is placed in the outside circle of the middle electrode 3 by the dint of ring insulation 5 and in the inner surface of the earth metal container 1 by the sustained conductor joining component 31a, so it can falls the voltage between middle electrode 3 and earth metal container 1 and reduce the voltage shares ratio.
Description
Technical field
The present invention relates to the voltage check device of air insulating device, particularly the counter-measure of surge voltage.
Background technology
The existing voltage check device that is used for air insulating device as described below.Figure 15 is the cut-open view of the formation of the existing voltage check device of expression.
As shown in figure 15, has the grounded metal container 1 as the electric conductivity container of conductive member, the cylindrical outer casing of air insulating devices such as formation gas-insulated switch.As the bus 2 of high-voltage conductor, be configured in the inside of grounded metal container 1 coaxially.The target 3 of tubular and grounded metal container 1 are configured between grounded metal container 1 and the bus 2 coaxially, and are mounted to respectively and grounded metal container 1 and bus 2 each self-sustaining electric insulation.Target 3 is held in the inside surface of grounded metal container 1 by insulation support member 5 insulation twelve Earthly Branches.
In the inner space 9 of grounded metal container 1, between target 3 and bus 2, become the capacitor C 1 of the 1st capacitor.The bonding conductor 6 that extraction voltage is used is installed on the target 3, and bonding conductor 6 passes insulation insulating element 8 and is connected with the high-pressure side of the 2nd capacitor 10.The low-pressure side of the 2nd capacitor 10 connects the outer container 11 that is in earthing potential.
Below, action describes to voltage detecting.Utilization is formed in the electrostatic capacitance of capacitor C 2 of the capacitor C 1 of conduct the 1st capacitor between bus 2 and the target 3 and the 2nd capacitor 10 than the intrinsic standoff ratio that produces, and decision is applied to the voltage on the photoelectric pressure transducer 12.And the detection corresponding with voltage on being applied to photoelectric pressure transducer 12 output, cause signal processing part 14 by fiber optic cables 15, thereby detect voltage as the bus 2 of high-voltage conductor.
In the voltage check device that constitutes like this, when high-frequency percussion voltage is applied to bus 2, in the closed-loop path that comprises the 2nd capacitor 10 and photoelectric pressure transducer 12 resonance phenomena takes place, voltage that produces at the two ends of the 2nd capacitor 10 and the voltage that produces at the two ends of photoelectric pressure transducer 12 become big.Therefore, connect the 2nd capacitor 10 and photoelectric pressure transducer 12, when preventing the surge voltage that is added on the photoelectric pressure transducer 12, also shorten shock duration (for example with reference to Japanese documentation 1) with the influence electricity resistance body.
The flat 11-202001 communique of patent documentation 1: Te Open
The voltage check device of above-mentioned existing air insulating device, though corresponding braking measure has been taked in the closed-loop path that comprises the 2nd capacitor 10 and photoelectric pressure transducer 12, but when high-frequency percussion voltage is applied on the bus 2, it is big that the voltage that target 3 low-pressure sides are shared becomes, and produces superpotential sometimes on the each several part in voltage check device until insulation damages.
The present invention proposes for addressing the above problem, and its purpose is to reduce the voltage that target low pressure is shared on surveying when having surge voltage to apply, and prevents that each several part produces superpotential in the voltage check device, avoids insulation damages.
Summary of the invention
The voltage check device of the 1st air insulating device that the present invention is correlated with, this air insulating device is made of following parts: the tubular electric conductivity container of enclosing insulating gas and ground connection; Be configured in the high-voltage conductor in this electric conductivity container coaxially; And in described electric conductivity container, separate predetermined distance and be the target that tubular ground forms coaxially with described high-voltage conductor, as the voltage detecting object part, the voltage check device of this air insulating device comprises: be connected in the 2nd capacitor between described target and the described electric conductivity container with the described high-voltage conductor of this air insulating device; And the voltage sensor that is connected in parallel with the 2nd capacitor, the bonding conductor that extraction voltage is used is installed on the described target, described bonding conductor passes the insulation insulating element of the gas in the gas inside space of separating described electric conductivity container and the outside, the high-pressure side that connects described the 2nd capacitor is by the 1st capacitor and described the 2nd capacitor dividing potential drop that will be formed by described high-voltage conductor and described target and be applied to described voltage sensor outward by the branch pressure voltage that described the 2nd capacitor is shared and carry out voltage detecting.And, being included in the support member of supporting described target in the described electric conductivity container, this support member comprises: the 1st annular that is arranged on by annular insulation course on the excircle of described tubular target is supported conductor; And the 1st bonding conductor that the 1st annular support conductor is connected to described electric conductivity container.
The voltage check device of the 2nd air insulating device that the present invention is correlated with, this air insulating device is made of following parts: the tubular electric conductivity container of enclosing insulating gas and ground connection; Be configured in the high-voltage conductor in this electric conductivity container coaxially; And in described electric conductivity container, separate predetermined distance and be the target that tubular ground forms coaxially with described high-voltage conductor, as the voltage detecting object part, the voltage check device of this air insulating device comprises: be connected in the 2nd capacitor between described target and the described electric conductivity container with the described high-voltage conductor of this air insulating device; And the voltage sensor that is connected in parallel with the 2nd capacitor, be applied to described voltage sensor outward by the 1st capacitor that will form by described high-voltage conductor and described target and the branch pressure voltage between described the 2nd capacitor and carry out voltage detecting.And, also comprise: the ground wire conductor that the low-pressure side and the described electric conductivity container of described the 2nd capacitor is electrically connected; And described target is connected electrically to the bonding conductor of described the 2nd capacitor, and described ground wire conductor arrangement is become to surround described bonding conductor.
Voltage check device according to the 1st air insulating device of the present invention, have the support member of supporting target in the electric conductivity container, this support member is supported conductor owing to have the 1st annular that is arranged on the excircle of target of tubular by annular insulation course; And the 1st annular support the 1st bonding conductor that conductor is connected with described electric conductivity container, so, can reduce the impedance of the electric capacity generation between target and the electric conductivity container.Therefore, can reduce the voltage of sharing of target low-pressure side when adding high-frequency percussion voltage, prevent from voltage check device, to produce superpotential on the each several part, avoid insulation damages.
Voltage check device according to the 2nd air insulating device of the present invention has: the ground wire conductor that the low-pressure side of the 2nd capacitor and electric conductivity container are electrically connected; And, and above-mentioned ground wire conductor arrangement become to surround above-mentioned bonding conductor with target and the electric bonding conductor that is connected of above-mentioned the 2nd capacitor, so, impedance can be reduced from the low-pressure side of the 2nd capacitor to earthing potential.Therefore, can reduce the voltage of sharing of target low-pressure side when adding high-frequency percussion voltage, prevent from voltage check device, to produce superpotential on the each several part, avoid insulation damages.
Description of drawings
Fig. 1 is the cut-open view of the voltage check device formation of the air insulating device of expression embodiment of the present invention 1.
Fig. 2 is the equivalent circuit diagram of the voltage check device shown in Fig. 1.
Fig. 3 is the voltage share ratio of expression embodiment of the present invention 1 and the figure that concerns usefulness between the impressed voltage frequency characteristic.
Fig. 4 changes the figure that the relations of dependence are used between voltage share ratio and impressed voltage frequency for the value that makes C3 of expression embodiment of the present invention 1.
The figure that Fig. 5 uses for the relations of dependence between expression voltage share ratio of embodiment of the present invention 1 and C3.
Fig. 6 changes the figure that the relations of dependence are used between voltage share ratio and C3 for the value that makes L3 of expression embodiment of the present invention 1.
Fig. 7 is the cut-open view of the voltage check device formation of the air insulating device of other example of expression embodiment of the present invention 1.
Fig. 8 is the cut-open view of the voltage check device formation of the air insulating device of other example of expression embodiment of the present invention 1.
Fig. 9 is the sectional view of the structure of the support member of supporting target on the grounded metal inner surface of container of expression embodiment of the present invention 2.
Figure 10 is the sectional elevation of the structure of the support member of supporting target on the grounded metal inner surface of container of expression embodiment of the present invention 2.
Figure 11 is the phantom view of the voltage check device formation of the air insulating device of expression embodiment of the present invention 3.
Figure 12 depends on the figure that characteristic is used for the value that makes L2 of expression embodiment of the present invention 3 changes between voltage share ratio and impressed voltage frequency.
Figure 13 is the cut-open view of the voltage check device formation of the air insulating device of other example of expression embodiment of the present invention 3.
Figure 14 is the cut-open view of the voltage check device formation of the air insulating device of other example of expression embodiment of the present invention 3.
Figure 15 is the summary pie graph of the voltage check device formation of the existing air insulating device of expression.
Label declaration
1 grounded metal container as the electric conductivity container, 2 buses as high-voltage conductor, 3 targets, 6 bonding conductors, 8 insulation insulating elements, 10 the 2nd capacitors, 12 voltage sensors, 15 annular insulation courses as the insulation support member, 22 ground wires (ground wire conductor), 22a ground wire line material, 22b, 22c tubular conductor (ground wire conductor), 24 target side bonding conductors as the 2nd bonding conductor, 24a supports the target side ring shape of conductor to support conductor as the 2nd annular, 25 annular insulation courses as the insulation support member, 26 container one side bonding conductors as the 1st bonding conductor, 26 container one side support conductors as the 1st annular support conductor, 31 the 1st annulars are supported conductor, 31a, 31b is as the support conductor connecting elements of the 1st bonding conductor, the AR lightning arrester
Embodiment
Fig. 1 is the cut-open view of the voltage check device formation of the air insulating device of expression embodiment of the present invention 1.Fig. 1 (a) is that sectional view, Fig. 1 (b) are partial cross sectional view.
As shown in Figure 1,, constitute the cylindrical outer casing of air insulating device such as gas-insulated switch, and charge into insulating gas such as SF6 as the grounded metal container 1 of the electric conductivity container of forming by conductive member.
As the bus 2 of the high-voltage conductor of voltage detecting object part, be configured in the inside of grounded metal container 1 coaxially, the target 3 and the grounded metal container 1 of tubular are configured between grounded metal container 1 and the bus 2 coaxially.Grounded metal container 1 and bus 2 each self-sustaining electric insulation are installed.
In the internal gas space of grounded metal container 1, between target 3 and bus 2, become the capacitor C 1 of the 1st capacitor.The bonding conductor 6 that extraction voltage is used is installed on the target 3, and bonding conductor 6 passes the insulation insulating element 8 of the gas of separating grounded metal container 1 internal gas space and the outside, connects the high-pressure side of the 2nd capacitor 10.The low-pressure side of the 2nd capacitor 10 connects the outer container 11 that is positioned at earthing potential.The 22nd, the ground wire of connection outer container 11 and grounded metal container 1.
The 2nd capacitor 10 is connected in parallel with voltage sensor 12, and the 2nd capacitor 10 and voltage sensor 12 are contained in outer container 11.Unshowned signal processing part in the efferent connection layout of voltage sensor 12.
Below, action describes to voltage detecting.According to the intrinsic standoff ratio of 2 of the capacitor C of the capacitor C 1 of conduct the 1st capacitor that constitutes between bus 2 and the target 3 and the 2nd capacitor 10, decision is applied to the impressed voltage of voltage sensor 12.And derive the detection corresponding with the impressed voltage that is applied to voltage sensor 12 to signal processing part and export, detect the voltage of the bus of using as high-voltage conductor 2 by signal Processing.Voltage sensor 12 for example can adopt the analog voltage signal after will being shared by the 2nd capacitor 10 voltages to be transformed into the A/D transducer of numeral or the device of detected current integration being exported as voltage by resistance.Or has a photoelectric pressure transducer of photovoltage element.
The equivalent circuit diagram of the voltage check device shown in Fig. 2 presentation graphs 1.
In Fig. 2, C1～C4, L1～L4 and R1 are defined as follows.
C1: the electric capacity between bus 2 and the target 3 (electric capacity of the 1st capacitor 10).
C2: the electric capacity of the 2nd capacitor 10.
C3: the electric capacity of insulation support member (annular insulation course) 15.
C4: the electric capacity of voltage sensor 12.
L1; The inductance that connects the lead-in wire of voltage sensor 12.
L2: the inductance from the 2nd capacitor 10 to the ground connection position (comprising the inductance that the 2nd capacitor 10 has).
L3 is from insulation support member (annular insulation course) 15 inductance to the ground connection position.
L4: the inductance of bonding conductor 6.
R1: discharge resistance
Below, on the voltage check device to the voltage that is applied to bus 2 in detection, the voltage of sharing that target 3 low-pressure sides are shared describes.
Voltage share ratio (intrinsic standoff ratio) among Fig. 2 is decided by the ratio of the resulting impedance of the impedance of the C1 in the voltage check device and C1 low-pressure side.The voltage share ratio of this moment is because the impedance of the capacitor C 4 of voltage sensor 12 is very big, so become the ratio of the impedance of Z1 to the superimposed impedance of Z2, Z3.Here, Z1 is the impedance of C1, and Z2 is the impedance of L4, C2 and L2.Z3 is the impedance of C3 and L3.
As long as be added in voltage waveform on the bus 2 and be the low frequency component smaller or equal to 100kHz, then in common formation, the impedance of impedance L2, L3, L4, R2 of comparing C2 is enough little, and the impedance of C3 is enough big.Therefore, the voltage share ratio is shared decision by the impedance of C1 and C2.
On the other hand, since the voltage that the impact of actions such as isolating switch or switch generation has above the high fdrequency component of 100kHz be applied under the situation of bus 2, L2, L3, L4, C3 be not owing to can not slightly disregarding than just with the impedance phase of C2, so the voltage share ratio changes.When high-frequency percussion voltage was applied to bus 2, the voltage of sharing of target 3 low-pressure sides became big, but this rising of sharing voltage reduces to be suppressed owing to the voltage share ratio of low-pressure side.
Fig. 3 is the figure of the relation between expression voltage share ratio and impressed voltage frequency characteristic.Utilize the curve A of the voltage share ratio of prior art according to expression, when Z2 is reduced, just can shown in curve B, reduce the voltage share ratio, when Z3 is reduced, can shown in curve C, reduce the voltage share ratio again.
Fig. 4 changes for expression makes the value of C3, depends on the figure that characteristic is used between voltage share ratio and impressed voltage frequency.Among the figure,, establish L2=0.1 μ H, L3=0.1 μ H, L4=0.1 μ H, C1=10pF, C2=10000pF, with this calculating voltage share ratio as example.The value one of C3 is big, and the Z3 voltage share ratio that just diminishes diminishes, and can suppress each superpotential that partly takes place in the voltage check device.
Fig. 5, Fig. 6 represent the voltage share ratio of frequency 100MHZ of impressed voltage and the relations of dependence between C3.Particularly Fig. 6 represents to make the value of L3 to change.As shown in FIG., the value of C3 is from 10pF to 20pF, and for the value (smaller or equal to 0.1PF) of existing C 3, the voltage share ratio is about half.Though also depend on the value of L or C2, if C3, then can suppress the superpotential that each several part takes place in the voltage check device fully more than or equal to 10pF.In addition, the small voltage share ratio also can be more little more for the value of L3.
In this embodiment 1, as mentioned above, support conductor 31 and support conductor connecting elements 31a with annular insulation course 15, annular, constitute 3 support member that are held in grounded metal container 1 inside surface of target.By like this, can make annular insulation course 15 attenuates that become the insulation support member, and strengthen the formation area.Therefore, increase support member (annular insulation course) 15 the capacitor C 3 that insulate in the equivalent electrical circuit shown in Fig. 2 and reduce the impedance of Z3.By like this, the voltage share ratio of voltage check device low-pressure side diminishes, and can prevent the superpotential that each several part produces in the voltage check device.Therefore can prevent insulating component, the insulation damages at support member that particularly insulate (annular insulation course) 15 or insulation insulating element 8 places.
Fig. 7 is the part section portion of the voltage check device formation of the air insulating device of other example of expression embodiment of the present invention 1, and Fig. 7 (a) represents sectional view, and Fig. 7 (b) represents sectional elevation.In this example, in the voltage check device shown in Fig. 1, between the ground connection position of target 3 and grounded metal container 1, be connected to become discharger (lightning arrester) AR that impacts the inhibition means.Like this, just be connected discharger (lightning arrester) AR in parallel, and then suppress annular insulation course 15 places generation superpotential, can positively prevent the insulation damages of annular insulation course 15 with the capacitor C 3 of annular insulation course 15.
Fig. 8 is the phantom view of the voltage check device formation of the air insulating device of another other example of expression embodiment of the present invention 1.Fig. 8 (a) expression sectional view, Fig. 8 (b) represent sectional elevation.Identical with the voltage check device shown in Fig. 1, annular supports that conductor 31 is arranged on target 3 excircles by annular insulation course 15, simultaneously, by be fixed in the inside surface of grounded metal container 1 as the support conductor connecting elements 31b of the 1st bonding conductor, though be electrically connected with grounded metal container 1, but in this embodiment, support conductor connecting elements 31b to form ring-type along the inner peripheral surface of grounded metal container 1.Therefore, similarly can obtain to increase the effect of C3, simultaneously, can also reduce inductance L 3 from insulation support member (annular insulation course) 15 to the ground connection position with above-mentioned embodiment 1.By like this, can reduce the impedance of Z3 once again, further reduce the voltage share ratio of voltage check device low-pressure side, improve superpotential inhibition effect.
Also have, in above-mentioned embodiment 1, joining as the excircle of the annular insulation course 15 of insulation support member and target 3 is configured, but also can constitute 3 support member that are held in grounded metal container 1 inside surface of target as Fig. 9, shown in Figure 10.Fig. 9 and Figure 10 are the sectional view and the sectional elevation of the structure of the support member that 3 of targets is held in grounded metal container 1 inside surface of expression embodiment of the present invention 2.Also have, the structure beyond the support member shown in the figure is identical with above-mentioned embodiment 1.
As Fig. 9, shown in Figure 10, support the vessel side annular of conductor to support conductor 26a, reach as the 2nd annular and support the target side ring shape of conductor to support the annular insulation course 25 of conductor 24a as the 1st annular, constitute the CS of fit structure portion that works in coordination by formation insulation support member.The vessel side annular supports conductor 26a to utilize the vessel side bonding conductor 26 as the 1st bonding conductor to be connected with grounded metal container 1.In addition, target side ring shape supports conductor 24a to utilize the target side bonding conductor 24 as the 2nd bonding conductor to be connected with target 3.In addition, as shown in Figure 9, target side ring shape is supported conductor 24a and vessel side annular to support conductor 26a to each have recess by annular insulation course 25 these recesses to be worked in coordination with protuberance with protuberance to be in the same place.In the present embodiment, for the protuberance of the axial protrusion of grounded metal container 1 from conductor 24a to target side ring shape that support and recess that the vessel side annular is supported conductor 26a by work in coordination together state of the annular insulation course 25 of thickness G.
By like this, the annular insulation course 25 that constitutes 1 insulation of target 3 and grounded metal container support member can be done thinlyyer than the insulation support member (annular insulation course 15) of embodiment 1, form bigger area, can further increase the capacitor C 3 of insulation support member (annular insulation course).By like this, reduce the impedance voltage of Z3 once again, the voltage share ratio of pick-up unit low-pressure side reduces, and can further prevent the superpotential that each several part takes place in the voltage check device.
Also have, in above-mentioned embodiment 1,2, with the shape of annular insulation course 15,25 that constitutes the insulation support member of 1 in target 3 and grounded metal container do thin, do big, increase capacitor C 3, but if can increase C3 more effectively with 15,25 of material looping insulation courses with high-dielectric coefficient.Usually the insulating material that is widely used for the C3 part is that specific inductive capacity is 4 based on the epoxy resin or the FRP of use earth silicon material, and this place uses aluminum oxide epoxy resin high dielectric constant materials such as (specific inductive capacity 6).
In addition, also can increase capacitor C 3 by disposing capacitor in parallel with C3.
Figure 11 is the phantom view of the voltage check device formation of the air insulating device of this embodiment 3 of expression, and Figure 11 (a) represents sectional view, the cut-open view of XI (b)-XI (b) line among Figure 11 (b) expression Figure 11 (a).
In addition, convenient among Figure 11 for statement, only represent target 3 low-pressure sides, also omit the diagram in the outer container 11, but institute's abridged part is all identical with the above-mentioned embodiment 1 shown in Fig. 1.
As shown in FIG., target 3 is held in surface within the grounded metal container 1 by 5 of support member of insulation.Insulation support member 5 herein is pillars identical with existing member.The bonding conductor 6 that extraction voltage is used is installed on the target 3, and bonding conductor 6 passes the insulation insulating element 8 of the internal gas space of separating grounded metal container 1 and the gas of surveying outward, is connected with the 2nd capacitor 10 high-pressure sides.The 2nd capacitor 10 low-pressure sides connect the outer container 11 that is positioned at earthing potential.Insulation insulating element 8 is anchored on the flange part 1b of grounded metal container 1 by bolt component BL.Also have 1a to be formed at container one side of flange part 1b and the tubular bonding conductor that outer container one side surrounds bonding conductor, container one 1b of side flange portion connects grounded metal container 1, and outer container one 1b of side flange portion connects outer container 11.The 22nd, the ground wire conductor is used for being electrically connected with the grounded metal container 1 that not shown the 2nd capacitor 10 low-pressure side terminals and outer container 11 are remained on earthing potential.
In this case, use many ground wire line material 22a that extend in parallel along the length direction of bonding conductor 6 to constitute, should be configured to round bonding conductor 6 by many ground wire line material 22a.By so constituting the inductance that ground wire conductor 22 can reduce ground wire conductor 22, can reduce the inductance L 2 shown in the equivalent electrical circuit of Fig. 2 from the 2nd capacitor 10 to the ground connection position.Can reduce thus L4, C2, and the impedance that produces of L2 be Z2.
As previously discussed, by reducing the voltage share ratio that Z2 can reduce voltage check device.Figure 12 represents to make the value of L2 to change the relations of dependence between voltage share ratio and impressed voltage frequency.
When the value of L2 diminished, the Z2 voltage share ratio that diminishes also diminished, and can prevent the superpotential that takes place on the each several part in the voltage check device.Therefore, can prevent insulating component, the insulation damages at support member that especially insulate (annular insulation course) and insulation insulating element 8 places.
Figure 13 is the phantom view of the voltage check device formation of the air insulating device of other example of expression embodiment of the present invention 3.Figure 13 (a) represents sectional view, the cut-open view of XIII (b)-XIII (b) line among Figure 13 (b) expression Figure 13 (a).
As shown in figure 13, ground wire conductor 22 usefulness tubular conductor 22b constitute, and this tubular conductor 22b is configurable around bonding conductor 6.Also can reduce the inductance of ground wire conductor 22 in this case, obtain the effect identical with above-mentioned embodiment 3.
Figure 14 is the phantom view of the voltage check device formation of the air insulating device of another other example of expression embodiment of the present invention 3.Figure 14 (a) represents sectional view, the cut-open view of XIV (b)-XIV (b) line among Figure 14 (b) expression Figure 14 (a).
As shown in figure 14, the tubular conductor 22c that ground wire conductor 22 usefulness are configured to cover insulation insulating element 8 outer circumference surfaces constitutes, and container one side of the grounded metal container 1 by insulation insulating element 8 subtends and the flange part 1b of outer container one side are electrically connected mutually.This situation also can reduce the inductance of ground wire conductor 22, obtains the effect same with above-mentioned embodiment 3.
Also have, the structure of the ground wire conductor 22 shown in this embodiment 3 is also applicable to the insulate voltage check device of support member of annular insulation course 15,25 is used to shown in the above-mentioned embodiment 1,2.In this case,,, and then reduce the voltage share ratio, improve superpotential inhibition effect so the impedance of Z2 and Z3 can reduce because can increase capacitor C 3.
Also have, the voltage check device of the air insulating device shown in the above-mentioned embodiment 1～3 also can be applicable to the voltage check device of three-phase, gas insulated switchgear (GIS) usefulness.For example, be applicable to a phase one 3 voltage check devices that separate mutually respectively.
Claims (7)
1. the voltage check device of an air insulating device, this air insulating device is made of following parts:
Enclose the tubular electric conductivity container of insulating gas and ground connection;
Be configured in the high-voltage conductor in this electric conductivity container coaxially; And
In described electric conductivity container, separate predetermined distance and be the target that tubular ground forms coaxially with described high-voltage conductor,
With the described high-voltage conductor of this air insulating device as the voltage detecting object part,
The voltage check device of this air insulating device comprises:
Be connected in the 2nd capacitor between described target and the described electric conductivity container; And
The voltage sensor that is connected in parallel with the 2nd capacitor,
The bonding conductor that extraction voltage is used is installed on the described target, and described bonding conductor passes the insulation insulating element of the gas in the gas inside space of separating described electric conductivity container and the outside, connects the high-pressure side of described the 2nd capacitor,
By the 1st capacitor and described the 2nd capacitor dividing potential drop that will form by described high-voltage conductor and described target and be applied to described voltage sensor by the branch pressure voltage that described the 2nd capacitor is shared and carry out voltage detecting, it is characterized in that, also comprise:
Support the support member of described target in described electric conductivity container, this support member comprises:
Be formed on the insulation support member on the excircle of target of described tubular annularly;
The 1st annular that is arranged on by this insulation support member on the excircle of described target is supported conductor; And
Support conductor to be connected to the 1st bonding conductor of described electric conductivity container the 1st annular.
2. the voltage check device of air insulating device as claimed in claim 1 is characterized in that,
Along the inner peripheral surface of described electric conductivity container, form annularly described the 1st annular is supported the 1st bonding conductor that conductor is connected with described electric conductivity container.
3. the voltage check device of air insulating device as claimed in claim 1 is characterized in that,
Between described target and described electric conductivity container, have
The 2nd annular is supported conductor; And
The 2nd annular is supported the 2nd bonding conductor that conductor is connected with described target,
Described the 1st annular supports that conductor has recess, and the 2nd annular supports that conductor has protuberance, makes recess and protuberance chimeric mutually by described insulation support member.
4. the voltage check device of air insulating device as claimed in claim 1 is characterized in that,
Between described target and described electric conductivity container, connect lightning arrester.
5. as the voltage check device of each described air insulating device in the claim 1 to 4, it is characterized in that, comprise that also the low-pressure side with described the 2nd capacitor is connected electrically to the ground wire conductor of described electric conductivity container,
And described ground wire conductor arrangement is become to surround described bonding conductor.
6. the voltage check device of air insulating device as claimed in claim 5 is characterized in that,
Many ground wire line material with extending in parallel along described bonding conductor length direction constitute described ground wire conductor, and should be configured to surround described bonding conductor by many ground wire line material.
7. the voltage check device of air insulating device as claimed in claim 5 is characterized in that,
Tubular ground constitutes described ground wire conductor, and is configured in around the described bonding conductor.
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| JP2005133794 | 2005-05-02 | ||
| JP2005133794 | 2005-05-02 |
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| CN1858598A CN1858598A (en) | 2006-11-08 |
| CN100580458C true CN100580458C (en) | 2010-01-13 |
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| CN 200610077816 Expired - Fee Related CN100580458C (en) | 2005-05-02 | 2006-04-29 | Voltage check device for gas insulation apparatus |
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| CN104267235B (en) * | 2014-09-01 | 2017-09-29 | 珠海许继电气有限公司 | A kind of annular voltage sensing device |
| CN109313221B (en) * | 2016-06-23 | 2020-12-29 | 三菱电机株式会社 | Voltage detection device and gas insulated switchgear equipped with voltage detection device |
| CN108732410B (en) * | 2018-06-04 | 2024-02-20 | 清大智能（北京）科技有限公司 | Voltage measuring device for distribution line |
-
2006
- 2006-04-29 CN CN 200610077816 patent/CN100580458C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104781679A (en) * | 2012-12-03 | 2015-07-15 | 三菱电机株式会社 | Voltage detection device |
| CN104781679B (en) * | 2012-12-03 | 2017-03-08 | 三菱电机株式会社 | Voltage check device |
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| Publication number | Publication date |
|---|---|
| CN1858598A (en) | 2006-11-08 |
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