CN107064756A - The device of suspension electrode in a kind of Simulated GlS - Google Patents
The device of suspension electrode in a kind of Simulated GlS Download PDFInfo
- Publication number
- CN107064756A CN107064756A CN201710210633.9A CN201710210633A CN107064756A CN 107064756 A CN107064756 A CN 107064756A CN 201710210633 A CN201710210633 A CN 201710210633A CN 107064756 A CN107064756 A CN 107064756A
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- hole
- flange
- gis
- suspension electrode
- adjusting rod
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1254—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of gas-insulated power appliances or vacuum gaps
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Abstract
The embodiment of the present invention provides a kind of device of suspension electrode in Simulated GlS, it is related to high-tension electricity experimental technique field, solve in the prior art when studying suspension electrode electric discharge phenomena, it is necessary to which the operating efficiency for opening the experiment that GIS housings adjustment suspension electrode position occurs is low and the problem of result of the test poor reliability.The device includes：The flange for being provided with and being fixedly connected with GIS housings at opening, opening is provided with GIS housings, high voltage bus and suspension electrode positioned at GIS enclosure interiors, GIS housings, flange cooperatively forms the sealing structure for sealing opening with blind flange, and device also includes：GIS housings are stretched into adjustment portion, the bottom of adjustment portion through the first through hole on blind flange, are connected with suspension electrode, and the top of adjustment portion is located at the outside of GIS housings.
Description
Technical field
The present invention relates to a kind of device of suspension electrode in high-tension electricity experimental technique field, more particularly to Simulated GlS.
Background technology
Gas insulated switchgear (English：GAS Insulated SWITCHGEAR, referred to as：GIS) it is internal filled with
The sulfur hexafluoride of certain pressure is (referred to as：SF6) gas is as dielectric, with good insulating properties, by more and more extensive
Ground is used in power system.Due to SF6Gas just has stronger insulating properties when field uniformity is preferable, therefore in engineering
GIS is generally designed as concentric cylinder structure, it is ensured that inside is slightly uneven electric field.
Radome is generally widely used in controlling GIS internal electric intensities, usually using connected structure connection, bonding strength
It is not high, if Rig up error, suspension electrode defect is will appear from, causes internal field too high so that non-uniform electric, so that
Obtain SF6The insulating properties of gas are greatly reduced.When in GIS runnings by voltge surge, usually lacked by this kind of insulation
Fall into and trigger insulation fault.Therefore, it is necessary to design it is a kind of can truly in Simulated GlS suspension electrode defect model, to study
Suspension electrode electric discharge phenomena in GIS.The defect model of suspension electrode electric discharge phenomena is required to open GIS in research GIS at this stage
Housing adjusts suspension electrode position, and multiple adjustment suspension electrode position is usually required during suspended discharge phenomenon is studied
Put, be adjusted if opening housing every time, can make it that the operating efficiency of experiment is low, but because experiment needs strict sealing knot
, by multiple opening and closing, there is component wear so that sealing effectiveness is deteriorated, so as to cause the reliability of result of the test in structure
Difference.
The content of the invention
Embodiments of the invention provide a kind of device of suspension electrode in Simulated GlS, solve outstanding in research in the prior art
During floating electrode discharge phenomenon, it is necessary to the operating efficiency for opening the experiment that GIS housings adjustment suspension electrode position occurs it is low and
The problem of result of the test poor reliability.
To reach above-mentioned purpose, embodiments of the invention are adopted the following technical scheme that：
The embodiment of the present invention provides a kind of device of suspension electrode in Simulated GlS, including：GIS housings, positioned at the GIS
It is provided with opening, opening and is provided with and the GIS shells on the high voltage bus and suspension electrode of enclosure interior, the GIS housings
The flange that body is fixedly connected, the flange cooperatively forms the sealing structure for sealing the opening, described device with blind flange
Also include：The GIS housings are stretched into adjustment portion, the bottom of the adjustment portion through the first through hole on the blind flange, with institute
Suspension electrode connection is stated, the top of the adjustment portion is located at the outside of the GIS housings.
Exemplary, the adjustment portion includes：Adjusting rod and regulation handle, the top of the adjusting rod and the regulation hand
Handle is connected, and the GIS housings are stretched into the bottom of the adjusting rod by the first through hole on the blind flange, with the electricity that suspends
Pole is connected, and the blind flange is provided with the first spacing of mutual cooperation at the first through hole position and on the adjusting rod
Part, to limit the position that the adjusting rod is moved along the first through hole.
Exemplary, the first through hole is to be provided with to close with the corresponding threaded holes on screwed hole, the adjusting rod
Screw thread, to form first locating part.
Optionally, described device also includes：Top cover, the top cover is fixedly connected with the flange and the blind flange, institute
State and the second through hole is provided with top cover, the regulation handle passes through second through hole, and the top cover is in second through hole
The second locating part of mutual cooperation is provided with position and in the regulation handle, it is logical along second to limit the regulation handle
The position of hole movement.
Exemplary, second through hole is to be provided with to coordinate with the screwed hole in screwed hole, the regulation handle
Screw thread, to form second locating part.
Optionally, there is projection at the opening of the GIS housings, it is described raised to be fixedly connected with the flange.
Optionally, at least one seal groove, the sealing are provided with the hole wall of the first through hole on the blind flange
Sealing ring is provided with groove, the adjustment portion passes through the sealing ring, and is tightly connected with the first through hole.
Optionally, two seal grooves, described two seal grooves are set on the hole wall of the first through hole on the blind flange
Sealing ring is inside provided with, the adjustment portion is tightly connected also cross two sealing rings, and with the first through hole.
Optionally, the inside edge of the flange is arc-shaped and surface is smooth.
Optionally, it is provided with sealing ring between the flange and the blind flange.
The device of suspension electrode in Simulated GlS provided in an embodiment of the present invention, including：GIS housings, in GIS housings
It is provided with the high voltage bus and suspension electrode in portion, the GIS housings and is provided with what is be fixedly connected with GIS housings at opening, opening
Flange, the flange cooperatively forms the sealing structure for sealing opening with blind flange, and above-mentioned device also includes：Adjustment portion, is adjusted
GIS housings are stretched into the bottom in section portion through the first through hole on blind flange, are connected with suspension electrode, the top of adjustment portion is located at
The outside of GIS housings.Compared to prior art, in the Simulated GlS that this programme is provided in the device of suspension electrode adjusting rod bottom
End connection suspension electrode, the top of adjusting rod is located at the outside of GIS housings, therefore, it is possible to by using adjusting rod in GIS housings
Outside adjusts the position of suspension electrode, without opening GIS housings.So as to avoid in the prior art in research suspension electrode
, it is necessary to which the operating efficiency for opening the experiment that GIS housings adjustment suspension electrode position occurs is low and experiment is tied during electric discharge phenomena
The problem of fruit poor reliability.
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 only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the structural representation of the device of suspension electrode in a kind of Simulated GlS provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
For the ease of clearly describing the technical scheme of the embodiment of the present invention, in an embodiment of the present invention, employ " the
One ", the printed words such as " second " make a distinction to function or the essentially identical identical entry of effect or similar item, and those skilled in the art can
To understand that the printed words such as " first ", " second " are not defined to quantity and execution order.
The embodiment of the present invention provides a kind of device of suspension electrode in Simulated GlS, the profile that reference picture 1 is provided, the dress
Put including：Opening is provided with GIS housings 1, high voltage bus 2 and suspension electrode 8 positioned at GIS enclosure interiors, the GIS housings 1,
The flange 3 being fixedly connected with GIS housings is provided with opening, the flange 3 is cooperatively formed for sealing the close of opening with blind flange 4
Seal structure, the device also includes：Adjustment portion (5 and 7 composition adjustment portions in Fig. 1), the bottom of adjustment portion is passed through on blind flange
First through hole stretches into GIS housings 1, is connected with suspension electrode 8, and the top of adjustment portion is located at the outside of GIS housings 1.
Exemplary, what is provided in above-mentioned Fig. 1 is the sectional view of the device of suspension electrode in Simulated GlS, in solid knot
In structure, above-mentioned GIS housings 1 can be the cylinder kept flat, be equipped with the interposition of the cylinder kept flat at opening, opening
The flange 3 being fixedly connected with cylinder is provided with, the flange 3 cooperatively forms the sealing structure for sealing opening with blind flange 4,
Also include in the three-dimensional structure diagram：Adjustment portion, the bottom of adjustment portion is extend into cylinder through the first through hole on blind flange,
It is connected with suspension electrode 8, the top of adjustment portion is external positioned at cylinder.Above-mentioned stereochemical structure is splitted from centre position,
It can be obtained by the sectional view in above-mentioned Fig. 1.Following content illustrates the present invention's by taking the sectional view that Fig. 1 is provided as an example
Embodiment.
Exemplary, in order to ensure air-tightness during adjustment portion movement in GIS housings, first on above-mentioned blind flange
At least one seal groove is provided with the hole wall of through hole, sealing ring is provided with the seal groove, the adjustment portion passes through sealing ring, and
It is tightly connected with first through hole.
It is preferred that, two seal grooves, two seal grooves are set on the hole wall of the first through hole on above-mentioned blind flange
Sealing ring is inside provided with, the adjustment portion is tightly connected also cross two sealing rings, and with first through hole.
Exemplary, above-mentioned GIS housings and high voltage bus can be preferably using the design of 550kV GIS standards, material
Aluminium, the internal diameter of housing is preferably 550mm, and thickness is preferably 8mm, and high voltage bus diameter is preferably 160mm.Above-mentioned suspension electrode
Material is preferably aluminium.
Exemplary, bottom and the suspension electrode of above-mentioned adjustment portion can be that to be fixedly connected can also be that on-fixed connects
Connect, wherein, it can be that threaded connection or mucilage binding mode are connected to be fixedly connected.It is preferred that, for accurate and easily adjustment suspension
The position of electrode, the bottom of above-mentioned adjustment portion is fixedly connected with suspension electrode.Bottom and the electricity that suspends when above-mentioned adjustment portion
When pole is using threaded connection, the screw thread of above-mentioned adjustment portion bottom is preferably M6.
It is preferred that, in order to avoid there is the problem of electric field in corner discharge, caused GIS housings is uneven, it is necessary to will
The inside edge of flange carries out fillet processing and grinding process, and the radius of the fillet is preferably 5mm.So that the inner side of flange
Edge is arc-shaped and surface is smooth.
Exemplary, as shown in figure 1, above-mentioned adjustment portion includes：Adjusting rod 5 and regulation handle 7, the top of the adjusting rod 5
End is connected with regulation handle 7, and GIS housings 1 are stretched into the bottom of the adjusting rod 5 by the first through hole on blind flange, with the electricity that suspends
Pole 8 is connected, and blind flange is provided with the first locating part of mutual cooperation at first through hole position and on adjusting rod 5, to limit
The position that adjusting rod is moved along first through hole.
Optionally, for the ease of adjusting the position of suspension electrode using adjusting rod, above-mentioned first through hole is screwed hole,
The screw thread closed with corresponding threaded holes is provided with the adjusting rod, to form the first locating part.So, rotation adjusting lever can be passed through
To carry out adjusting the position for connecing suspension electrode.
Exemplary, the top of above-mentioned adjusting rod is fixedly connected with regulation handle, the bottom of adjusting rod and suspension electrode
It is fixedly connected, wherein, it can be that threaded connection or mucilage binding mode are connected to be fixedly connected.Bottom and suspension electrode spiral shell when adjusting rod
, it is necessary to be threaded in adjusting rod bottom when line is connected, and setting and the screw thread matching of adjusting rod bottom on suspension electrode
The screwed hole of conjunction.Or set raised on suspension electrode, screw thread is provided with the projection, is set and suspension electrode on adjusting rod
On the screwed hole that matches of raised screw thread, so as to realize that the bottom of adjusting rod is threadedly coupled with suspension electrode；Work as adjusting rod
Top when being connected with regulation handle mucilage binding, preferably set diameter to be slightly larger than the circle of adjusting rod in the bottom of regulation handle
Groove, it is ensured that regulation handle bottom and adjusting rod top mucilage binding are firm.The top of adjusting rod and the tool of the threaded connection of regulation handle
Bottom and suspension electrode screwing process of the body description with reference to above-mentioned adjusting rod, and the bottom of adjusting rod and suspension electrode glue
Dress mode connects the description process being connected with reference to the top of above-mentioned adjusting rod with regulation handle mucilage binding, repeats no more here.
Exemplary, the material of above-mentioned regulation handle is preferably aluminium, and regulation handle length is preferably 83mm.And it is above-mentioned
Adjusting rod be preferably epoxy rods diameter preferably 12mm, length is preferably 275mm.The top of above-mentioned regulation handle is side
Shape, to fix handwheel.
It is exemplary, there is projection at the opening of above-mentioned GIS housings, projection is fixedly connected with flange, is so being made
Make in technique, just without flange and GIS housing integrally connecteds are manufactured, after the long period has been used, in order to ensure device
Sealing, can also regularly change flange.
Exemplary, it is gas due to what is filled in the device of suspension electrode in Simulated GlS, so it is possible that air pressure mistake
Greatly, regulation handle may be flown out, is made troubles for regulation suspension electrode position.Therefore, in order to avoid occurring above-mentioned the problem of,
Optionally, as shown in figure 1, above-mentioned device also includes：Top cover 6, the top cover 6 is fixedly connected with flange 3 and blind flange 4, top cover 6
On be provided with the second through hole, regulation handle 7 passes through the second through hole, and top cover 6 is set at the second lead to the hole site and in regulation handle 7
The second locating part of mutual cooperation is equipped with, to limit the position that regulation handle 7 is moved along the second through hole.
Exemplary, the second above-mentioned through hole is that the screw thread coordinated with screwed hole is provided with screwed hole, the regulation handle,
To form the second above-mentioned locating part.
Optionally, above-mentioned top cover is fixedly connected between flange and blind flange, can be connected by mucilage binding mode, can also
It is attached by bolt.It is exemplary, when being attached between above-mentioned top cover and flange and blind flange by bolt, it is necessary to
Hole is threaded at the edge of top cover, flange and blind flange, by the cooperation of bolt and screwed hole, by top cover, flange and flange
These three parts are covered to fix.
Exemplary, above-mentioned flange, blind flange and cap diameter is preferably 120mm.Above-mentioned top cover, flange and
The screwed hole that the edge of blind flange is set is preferably M10, and the number of above-mentioned screwed hole is 6, the number of corresponding bolt
For 6.The material of above-mentioned flange, blind flange and top cover is preferably aluminium.The second above-mentioned through hole is screwed hole, the screwed hole
Preferably M20, above-mentioned the highly preferred of top cover is 76mm.
Optionally, in order to which the gas in ensureing in GIS housings is not revealed, it is provided between above-mentioned flange and blind flange
Sealing ring.So cause the better tightness of the device of suspension electrode in Simulated GlS, be not in gas leak phenomenon.
Exemplary, in order to which the gas in ensureing in GIS housings is not revealed, it can be set in the sealing surface of above-mentioned flange
Seal groove, the seal groove is used to place sealing ring.Wherein, the sealing surface of the flange is the face that flange is connected with blind flange.
The device of suspension electrode in Simulated GlS provided in an embodiment of the present invention, including：GIS housings, in GIS housings
It is provided with the high voltage bus and suspension electrode in portion, the GIS housings and is provided with what is be fixedly connected with GIS housings at opening, opening
Flange, the flange cooperatively forms the sealing structure for sealing opening with blind flange, and above-mentioned device also includes：Adjustment portion, is adjusted
GIS housings are stretched into the bottom in section portion through the first through hole on blind flange, are connected with suspension electrode, the top of adjustment portion is located at
The outside of GIS housings.Compared to prior art, in the Simulated GlS that this programme is provided in the device of suspension electrode adjusting rod bottom
End connection suspension electrode, the top of adjusting rod is located at the outside of GIS housings, therefore, it is possible to by using adjusting rod in GIS housings
Outside adjusts the position of suspension electrode, without opening GIS housings.So as to avoid in the prior art in research suspension electrode
, it is necessary to which the operating efficiency for opening the experiment that GIS housings adjustment suspension electrode position occurs is low and experiment is tied during electric discharge phenomena
The problem of fruit poor reliability.
In addition, adjusting the position of suspension electrode from GIS hull outsides by using adjustment portion, measurement suspension electrode is located at not
The Characteristics of Partial Discharge and breakdown characteristics of GIS housings during with position, so as to the influence of further research suspension electrode.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. the device of suspension electrode in a kind of Simulated GlS, including：GIS housings, the high voltage bus positioned at the GIS enclosure interiors
And suspension electrode, it is characterised in that it is provided with opening, opening to be provided with the GIS housings and fixes company with the GIS housings
The flange connect, the flange cooperatively forms the sealing structure for sealing the opening with blind flange, and described device also includes：Adjust
The GIS housings are stretched into section portion, the bottom of the adjustment portion through the first through hole on the blind flange, with the suspension electrode
Connection, the top of the adjustment portion is located at the outside of the GIS housings.
2. device according to claim 1, it is characterised in that the adjustment portion includes：Adjusting rod and regulation handle, it is described
The top of adjusting rod is connected with the regulation handle, and the bottom of the adjusting rod is stretched into by the first through hole on the blind flange
The GIS housings, are connected with the suspension electrode, and the blind flange is at the first through hole position and on the adjusting rod
The first locating part of mutual cooperation is provided with, to limit the position that the adjusting rod is moved along the first through hole.
3. device according to claim 2, it is characterised in that the first through hole is to be set on screwed hole, the adjusting rod
The screw thread closed with the corresponding threaded holes is equipped with, to form first locating part.
4. device according to claim 2, it is characterised in that also include：Top cover, the top cover and the flange and described
Blind flange is fixedly connected, and the second through hole is provided with the top cover, and the regulation handle passes through second through hole, and the top
The second locating part that mutual cooperation is provided with second lead to the hole site and in the regulation handle is covered, it is described to limit
The position that regulation handle is moved along the second through hole.
5. device according to claim 4, it is characterised in that second through hole is in screwed hole, the regulation handle
The screw thread coordinated with the screwed hole is provided with, to form second locating part.
6. device according to claim 1, it is characterised in that there is projection, the projection at the opening of the GIS housings
It is fixedly connected with the flange.
7. device according to claim 1, it is characterised in that set on the hole wall of the first through hole on the blind flange
Have and sealing ring is provided with least one seal groove, the seal groove, the adjustment portion passes through the sealing ring, and with described the
One through hole is tightly connected.
8. device according to claim 7, it is characterised in that set on the hole wall of the first through hole on the blind flange
Sealing ring is provided with two seal grooves, described two seal grooves, the adjustment portion also cross two sealing rings, and with institute
First through hole is stated to be tightly connected.
9. device according to claim 1, it is characterised in that the inside edge of the flange is arc-shaped and surface light
It is sliding.
10. device according to claim 1, it is characterised in that sealing is provided between the flange and the blind flange
Circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710210633.9A CN107064756A (en) | 2017-03-31 | 2017-03-31 | The device of suspension electrode in a kind of Simulated GlS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710210633.9A CN107064756A (en) | 2017-03-31 | 2017-03-31 | The device of suspension electrode in a kind of Simulated GlS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107064756A true CN107064756A (en) | 2017-08-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710210633.9A Pending CN107064756A (en) | 2017-03-31 | 2017-03-31 | The device of suspension electrode in a kind of Simulated GlS |
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| Country | Link |
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| CN (1) | CN107064756A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103336232A (en) * | 2013-06-25 | 2013-10-02 | 国家电网公司 | Detection device |
| CN103592588A (en) * | 2013-11-26 | 2014-02-19 | 深圳供电局有限公司 | Simulation device of floating potential flaws inside GIS power equipment |
| CN203572920U (en) * | 2013-11-25 | 2014-04-30 | 国家电网公司 | Parameter-adjustable suspended discharge test model |
| CN105866639A (en) * | 2016-04-12 | 2016-08-17 | 西安交通大学 | Model for simulating spike defect of high-voltage conductor in GIS |
| CN205643609U (en) * | 2016-04-26 | 2016-10-12 | 国网河南省电力公司技能培训中心 | Inside multiple partial discharge's of GIS analogue means |
| CN205826804U (en) * | 2016-07-11 | 2016-12-21 | 国网新疆电力公司电力科学研究院 | The defect model of floating potential discharge in a kind of Simulated GlS |
| CN206627595U (en) * | 2017-03-31 | 2017-11-10 | 中国南方电网有限责任公司电网技术研究中心 | The device of suspension electrode in a kind of Simulated GlS |
-
2017
- 2017-03-31 CN CN201710210633.9A patent/CN107064756A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336232A (en) * | 2013-06-25 | 2013-10-02 | 国家电网公司 | Detection device |
| CN203572920U (en) * | 2013-11-25 | 2014-04-30 | 国家电网公司 | Parameter-adjustable suspended discharge test model |
| CN103592588A (en) * | 2013-11-26 | 2014-02-19 | 深圳供电局有限公司 | Simulation device of floating potential flaws inside GIS power equipment |
| CN105866639A (en) * | 2016-04-12 | 2016-08-17 | 西安交通大学 | Model for simulating spike defect of high-voltage conductor in GIS |
| CN205643609U (en) * | 2016-04-26 | 2016-10-12 | 国网河南省电力公司技能培训中心 | Inside multiple partial discharge's of GIS analogue means |
| CN205826804U (en) * | 2016-07-11 | 2016-12-21 | 国网新疆电力公司电力科学研究院 | The defect model of floating potential discharge in a kind of Simulated GlS |
| CN206627595U (en) * | 2017-03-31 | 2017-11-10 | 中国南方电网有限责任公司电网技术研究中心 | The device of suspension electrode in a kind of Simulated GlS |
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Effective date of registration: 20210804 Address after: 510663 3 building, 3, 4, 5 and J1 building, 11 building, No. 11, Ke Xiang Road, Luogang District Science City, Guangzhou, Guangdong. Applicant after: China Southern Power Grid Research Institute Co.,Ltd. Applicant after: XI'AN JIAOTONG University Address before: Room 505-508, 4th and 5th floor, No.6 Huasui Road, Zhujiang New Town, Tianhe District, Guangzhou, Guangdong 510623 Applicant before: CSG POWER GRID TECHNOLOGY RESEARCH CENTER Applicant before: XI'AN JIAOTONG University |
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