CN105761913A - Electromagnetic shielding structure of GIS electronic mutual inductor - Google Patents
Electromagnetic shielding structure of GIS electronic mutual inductor Download PDFInfo
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- CN105761913A CN105761913A CN201610074497.0A CN201610074497A CN105761913A CN 105761913 A CN105761913 A CN 105761913A CN 201610074497 A CN201610074497 A CN 201610074497A CN 105761913 A CN105761913 A CN 105761913A
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- gis
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/24—Voltage transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
An electromagnetic shielding structure of a GIS electronic mutual inductor comprises an electromagnetic shielding unit in a primary body, an electromagnetic shielding unit of a secondary acquisition circuit and a sensor signal line grounding shielding unit. The electromagnetic shielding unit in the primary body comprises a shielding wiring ring, a coil shielding cylinder and a voltage sensor shielding cylinder. The electromagnetic shielding unit of the secondary acquisition circuit comprises a shielding wiring terminal strip, a wire outlet box and a collector shell. The sensor signal line grounding shielding unit comprises a secondary signal line and grounding modes of the secondary signal line. The structure can effectively inhibit interference of an electric field generated by conductor current flow in the primary body on the sensor signal line, it is guaranteed that signal transmission precision is not affected, meanwhile influences of a complex electromagnetic environment of a substation on an acquisition circuit are avoided, and it is guaranteed that the electronic mutual inductor does not generate malfunction signals under electromagnetic interference.
Description
Technical field
The invention belongs to high voltage electrical apparatus technical field, be specifically related to the electromangnetic spectrum of a kind of GIS electronic transformer.
Technical background
Along with advancing of intelligent grid concept, electronic mutual inductor is increasingly subject to pay attention to, electric mutual inductor is compared with routine transformer, there is fast response time, long transmission distance, without advantages such as magnetic saturation, in the practical application of power system, electric mutual inductor just progressively be replaced with traditional current-voltage transformer.
Along with the spread overwide areas of electric mutual inductor, the reliability of its signal transmission causes the great attention in industry.The electrical signal voltage of existing electric mutual inductor transmission is less, and capacity of resisting disturbance is more weak, and therefore, the technical scheme designing an effective lifting electric mutual inductor signal electromagnetism interference is extremely urgent.
Summary of the invention
For solving the technical problem of electric mutual inductor signal anti-electromagnetic interference capability difference, the present invention proposes the electromagnetic armouring structure of a kind of GIS electronic transformer, effectively can shield by the through-flow electromagnetic interference caused with transformer station's complex environment of conducting rod a body interior, it is ensured that the reliability of signal transmission.Simultaneously frame for movement is simple, it is ensured that electric mutual inductor Practical Project longtime running stability, effectively prevent the probability producing fault in complex environment.
The present invention is concrete by the following technical solutions:
The electromagnetic armouring structure of a kind of GIS electronic transformer, including the electromagnetic shielding system of the electromagnetic shielding system of a body interior and secondary acquisition circuit；It is characterized in that:
The electromagnetic shielding system of body interior includes shielding and walks wire loop 2, coil shielding cylinder 4, voltage sensor shielding cylinder 6；
Coil shielding cylinder 4, voltage sensor shielding cylinder 6 are all coaxial with major loop conducting rod 5 and GIS shell 10, and major loop conducting rod 5 is enclosed in inside, wherein, the outside tight set current sense coil 1 of described coil shielding cylinder 4, voltage sensor shielding cylinder 6 is arranged on the offside of coil shielding cylinder 4, leaves gap in the middle of voltage sensor shielding cylinder 6 and coil shielding cylinder 4；
Shielding is walked wire loop 2 and is arranged on the inner side of GIS shell 10, and holding wire 3 punching of current sense coil is placed on shielding and walks wire loop 2 inside, is connected on shield terminal row 7 after walking, through multiple shieldings, the passage that wire loop 2 is formed；
The electromagnetic shielding system of described secondary acquisition circuit includes shield terminal row 7, outlet box 8 and harvester shell 9；Shield terminal row 7 is for being transferred to the holding wire 3 of the current sense coil within GIS in the outlet box 8 outside GIS shell 10, and ultimately leads on the collection port of harvester；Outlet box 8 is all-metal closed box, is fixed together with GIS shell 10 and passes through its reliable ground, and outlet box 8 is used for installing harvester, is placed through the holding wire 3 of the current sense coil of shield terminal row 7 switching；Harvester shell 9 by GIS shell 10 ground connection for all-metal construction, is used for placing the circuit board of harvester, forms double layer screen with outlet box 8.
The present invention farther includes following preferred version:
The cylindrical drum bottom surface of described coil shielding cylinder 4 and voltage sensor shielding cylinder 6 is turnup structure, and flange part is fixed on GIS shell 10, by GIS shell 10 and ground reliable contacts.
The cylindrical drum bottom surface of described coil shielding cylinder 4 and voltage sensor shielding cylinder 6 is that flange part passes through antioxidation bolt presses on the GIS shell of ground connection.
Shielding is walked wire loop 8, coil shielding cylinder 4, voltage sensor shielding cylinder 6 and is all adopted shielding trap design, forms 0 potential areas between two discontiguous metallic shields.
GIS shell 10 is full-closed structure.
Shield terminal row 7 comprises some binding posts, is both provided with a metallic shield ring closed outside each binding post, and described metallic shield ring passes through GIS shell 10 ground connection.
Shield terminal row 7 employing aviation socket design, jack connector post is that copper is silver-plated, adopts the design of double-level-metal armor.
The holding wire 3 of current sense coil and be transferred to the holding wire within outlet box 8 and adopt double-deck twisted-pair shielded wire, screen layer adopts single-point grounding mode, on the earth point of leading-out wire box 8.
Outlet box 8 adopts high-strength aluminum alloy material, harvester shell 9 to adopt stainless steel surfaces drawing process, and all passes through grounding copper bar and be directly connected with earth mat.
The present invention has following useful technique effect:
In the present invention, electric mutual inductor is directly reliably connected with grounded screen, relatively independent with other equipment on GIS loop, it is to avoid due to the impact that the transmission of electric mutual inductor signal is produced by local overvoltage.
Accompanying drawing explanation
Fig. 1 is the electromagnetic armouring structure schematic diagram of the GIS electronic transformer of the present invention；
Wherein: wire loop, the holding wire of 3-current sense coil, 4-coil shielding cylinder, 5-major loop conducting rod, 6-voltage sensor shielding cylinder, 7-shield terminal row, 8-outlet box, 9-harvester shell, 10-GIS shell are walked in 1-current sense coil, 2-shielding.
Detailed description of the invention
Below in conjunction with Figure of description, technical scheme is further described in detail.
It is illustrated in figure 1 the electromagnetic armouring structure schematic diagram of the GIS electronic transformer of the present invention.The electromagnetic armouring structure of described GIS electronic transformer includes the electromagnetic shielding system of a body interior and the electromagnetic shielding system of secondary acquisition circuit.The electromagnetic shielding system of body interior includes shielding and walks wire loop 2, coil shielding cylinder 4, voltage sensor shielding cylinder 6, and wire loop 2, coil shielding cylinder 4, voltage sensor shielding cylinder 6 are walked in shielding.Coil shielding cylinder 4 is metal material, and outside tight set current sense coil 1, cylindrical drum bottom surface turnup structure, shell portion is coaxial with major loop conducting rod 5 and GIS shell 10, and conducting rod is enclosed in inside；Bottom surface flange part is fixed on GIS shell 10 by bolt presses, by GIS shell 10 and ground reliable contacts.Voltage sensor shielding 6 is metal material, and cylindrical drum bottom surface turnup structure, shell portion is coaxial with major loop conducting rod 5 and GIS shell 10, and conducting rod is enclosed in inside；Bottom surface flange part is fixed on GIS shell 10 by bolt presses, by GIS shell 10 and ground reliable contacts；It is identical with coil shielding cylinder 4 that voltage sensor shields 6 cylinder internal diameters, and installation site is at the offside of coil shielding cylinder 4, and a less gap is left in centre, is kept apart by the holding wire 3 of most electromagnetic fields that major loop conducting rod 5 produces with current sense coil.The metal material that wire loop 2 is identical with housing employing is walked in shielding, placement location is as shown in Figure 1, it is placed on GIS housing 10 internal, on the straight line of shield terminal row, holding wire 3 punching of current sense coil is placed therein, is connected on shield terminal row 7 after the passage being formed therethrough which.Shielding is walked wire loop 2 and is formed shielding trap, the electromagnetic interference that shielding spills from coil shielding cylinder 4 and voltage sensor shielding cylinder 6 intermediate air gap by adjusting suitable interval.
The electromagnetic shielding system of secondary acquisition circuit includes shield terminal row 7, outlet box 8 and harvester shell 9；Shield terminal row 7 is mainly used in being transferred in the outlet box 8 outside GIS shell 10 holding wire 3 of the current sense coil within GIS shell 10, and ultimately lead on the collection port of harvester, comprise some binding posts, have a metallic shield ring closed outside each binding post by GIS shell 10 ground connection.Outlet box 8 is all-metal closed box, being fixed together with GIS shell 10 and pass through its reliable ground, outlet box 8 is used for installing harvester, is placed through the holding wire 3 of current sense coil of shield terminal row 7 switching, shielding by the electromagnetic interference produced in environment.Harvester shell 9 is all-metal construction, by GIS shell 10 ground connection, is used for placing the circuit board of harvester and shielding the electromagnetic interference produced in environment, forms double layer screen with outlet box 8.
Shielding is walked wire loop 2 and is fixed on the upside of housing by the mode of welding or mechanical fasteners, is equally spaced；It selects the material identical with GIS shell 10, other metal material such as aluminum or steel；This kind of mode, under the premise facilitating holding wire cabling, installation, forms shielding trap, effectively suppresses a small amount of electromagnetic interference revealed interference to current mutual inductor coil holding wire from coil shielding cylinder 4, voltage sensor shielding cylinder 6.
Coil shielding cylinder and housing concentric, be bolted and be fixed on enclosure interior, and coil is placed on outside.Staggered relatively with voltage sensor shielding cylinder, a little gap is left in centre, and two shielding cylinders of both sides, gap have the fillet of R3, forms a shielding trap.
Voltage sensor shielding cylinder and housing concentric, be bolted and be fixed on enclosure interior, material selection aluminum alloy materials.
Voltage sensor shielding cylinder, current sense coil and coil shielding cylinder are by novel oxidation-resistant bolt presses on GIS shell, and GIS shell and earth mat are joined directly together.According to circumstances bolt is applied moment, it is ensured that between voltage sensor shielding cylinder, coil shielding cylinder and major loop conducting rod, keep enough insulation distances, distance change will not be produced because of vibration.
Voltage sensor shielding cylinder and electricity sensor coil between, shielding cabling interannular shielding trap be designed with maxwell equation group principle, width according to electric-field intensity distribution and the angle-determining shielding trap facilitating machining, i.e. voltage sensor shielding cylinder and fax sense winding space, cabling boxing is connected on the spacing on GIS shell.
Maxwell equation group is as follows: wherein× for curl,Is divergence, and H is magnetic field intensity, and J is conduction current density vector,For displacement current density, D is electric flux density, and E is electric field intensity, and B is magnetic induction, and ρ is electric charge volume density.According to maxwell equation group, under the premise of the given through-flow voltage of major loop conducting rod, electric current and structural model, Finite element arithmetic can be utilized to go out electric field and the Distribution of Magnetic Field of electric mutual inductor interior point, and adjusts structural model as criterion.
Outlet box is joined directly together by bolt and GIS shell 10, adopts high-strength aluminum alloy material, is fixed on the seam above hull outside, is linked together with the earth by shell., in secondary acquisition circuit package and harvester shell 9, harvester shell adopts stainless steel surfaces drawing process, and by being bolted directly on the internal connector of outlet box 8, bottom surface directly contacts with outlet box inwall, and it is firm to install.Also it is connected to earth lead inside harvester shell and outlet box, makes harvester effective grounding.Double layer screen is anti-interference, and structural strength is high, appearance looks elegant, and all pass through grounding copper bar and be directly connected with earth mat, and earth point contact area is greatly, isolated with GIS body, and reliably, shield effectiveness is good for ground connection.
Secondary singal line adopts double-deck twisted-pair shielded wire, and screen layer adopts single-point grounding mode, and earth point is on outlet box 8, and ground connection is reliable, simple to operate, and is avoided that to produce circulation on screen layer, signal transmission is produced interference when transient overvoltage.
Shield terminal row 7 employing aviation socket design, jack connector post is that copper is silver-plated, and the minimum conductive effect of resistance is good, adopts the design of double-level-metal armor, and effectiveness is good, it is ensured that internal signal transmission is interference-free；Adopt connect-disconnect structure, install simple and convenient.
Secondary singal line adopts double-deck twisted-pair shielded wire, screen layer adopts single-point grounding mode, and earth point is on the preset earthing block of the outlet box 8 being reliably connected with big earthing bar, and ground connection is reliable, simple to operate, and it is avoided that screen layer to produce circulation, signal transmission is produced interference when transient overvoltage.
The anti-interference energy of the GIS electronic transformer that employing principles above is designed is strong; meet " GBT20840.7-2007 transformer the 7th part: electronic type voltage transformer ", " GBT20840.8-2007 transformer the 8th part: electronic current mutual inductor " standard; may be directly applied in intelligent gas insulated metal closed switch equipment; realize on-line monitoring, quickly the function of protection and metering.
Embodiments of the invention are described in detail in conjunction with Figure of description and describe by applicant; but those skilled in the art should understand that; above example is only the preferred embodiments of the invention; detailed explanation is intended merely to help reader and is more fully understood that spirit of the present invention; and it is not limiting the scope of the invention; on the contrary, any any improvement made based on the spirit of the present invention or modify all should drop within protection scope of the present invention.
Claims (9)
1. an electromagnetic armouring structure for GIS electronic transformer, including the electromagnetic shielding system of the electromagnetic shielding system of a body interior and secondary acquisition circuit；It is characterized in that:
The electromagnetic shielding system of body interior includes shielding and walks wire loop (2), coil shielding cylinder (4), voltage sensor shielding cylinder (6)；
Coil shielding cylinder (4), voltage sensor shielding cylinder (6) are all coaxial with major loop conducting rod (5) and GIS shell (10), and major loop conducting rod (5) is enclosed in inside, wherein, outside tight set current sense coil (1) of described coil shielding cylinder (4), voltage sensor shielding cylinder (6) is arranged on the offside of coil shielding cylinder 4, leaves gap in the middle of voltage sensor shielding cylinder (6) and coil shielding cylinder (4)；
Shielding is walked wire loop (2) and is arranged on the inner side of GIS shell (10), holding wire (3) punching of current sense coil is placed on shielding and walks wire loop (2) inside, is connected on shield terminal row (7) after walking, through multiple shieldings, the passage that wire loop (2) is formed；
The electromagnetic shielding system of described secondary acquisition circuit includes shield terminal row (7), outlet box (8) and harvester shell (9)；Shield terminal row (7) is for being transferred to the holding wire (3) of the current sense coil within GIS in the outlet box (8) that GIS shell (10) is outside, and ultimately leads on the collection port of harvester；Outlet box (8) is all-metal closed box, being fixed together with GIS shell (10) and by its reliable ground, outlet box (8) is used for the holding wire (3) installed harvester, be placed through the current sense coil that shield terminal row (7) is transferred；Harvester shell (9) by GIS shell (10) ground connection for all-metal construction, is used for placing the circuit board of harvester, forms double layer screen with outlet box (8).
2. the electromagnetic armouring structure of GIS electronic transformer according to claim 1, it is characterised in that:
The cylindrical drum bottom surface of described coil shielding cylinder (4) and voltage sensor shielding cylinder (6) is turnup structure, and flange part is fixed on GIS shell (10), by GIS shell (10) and ground reliable contacts.
3. the electromagnetic armouring structure of GIS electronic transformer according to claim 2, it is characterised in that:
The cylindrical drum bottom surface of described coil shielding cylinder (4) and voltage sensor shielding cylinder (6) is that flange part passes through antioxidation bolt presses on the GIS shell of ground connection.
4. the electromagnetic armouring structure of the GIS electronic transformer according to claim 1 or 3, it is characterised in that:
Shielding is walked wire loop (8), coil shielding cylinder (4), voltage sensor shielding cylinder (6) and is all adopted shielding trap design, forms 0 potential areas between two discontiguous metallic shields.
5. the electromagnetic armouring structure of GIS electronic transformer according to claim 1, it is characterised in that:
GIS shell (10) is full-closed structure.
6. the electromagnetic armouring structure of GIS electronic transformer according to claim 1, it is characterised in that:
Shield terminal row (7) comprises some binding posts, is both provided with a metallic shield ring closed outside each binding post, and described metallic shield ring passes through GIS shell (10) ground connection.
7. the electromagnetic armouring structure of the GIS electronic transformer according to claim 1 or 7, it is characterised in that:
Shield terminal row (7) adopts aviation socket design, and jack connector post is that copper is silver-plated, adopts the design of double-level-metal armor.
8. the electromagnetic armouring structure of the GIS electronic transformer according to claim 1 or 7, it is characterised in that:
The holding wire (3) of current sense coil and be transferred to the internal holding wire of outlet box (8) and adopt double-deck twisted-pair shielded wire, screen layer adopts single-point grounding mode, on the earth point of leading-out wire box (8).
9. the electromagnetic armouring structure of the GIS electronic transformer according to claim 1 or 9, it is characterised in that:
Outlet box (8) adopts high-strength aluminum alloy material, and harvester shell (9) adopts stainless steel surfaces drawing process, and all passes through grounding copper bar and be directly connected with earth mat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610074497.0A CN105761913B (en) | 2016-02-03 | 2016-02-03 | A kind of electromagnetic armouring structure of GIS electronic transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610074497.0A CN105761913B (en) | 2016-02-03 | 2016-02-03 | A kind of electromagnetic armouring structure of GIS electronic transformer |
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| CN105761913A true CN105761913A (en) | 2016-07-13 |
| CN105761913B CN105761913B (en) | 2017-07-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110850137A (en) * | 2018-08-21 | 2020-02-28 | 西安西电高压开关有限责任公司 | Electronic transformer and data processing method |
| CN112714606A (en) * | 2020-12-29 | 2021-04-27 | 安徽盛世天朗软件科技有限公司 | Data transmission electromagnetic interference prevention device for network equipment and implementation method thereof |
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| JPH11317312A (en) * | 1998-05-06 | 1999-11-16 | Hitachi Ltd | Phase separating type gis directly coupled three phase transformer |
| KR20030042938A (en) * | 2001-11-26 | 2003-06-02 | 김연수 | meter transformer for construction multi contactor from input terminal and plastic operation method thereof |
| CN201918255U (en) * | 2010-11-26 | 2011-08-03 | 江苏思源赫兹互感器有限公司 | Combined type electronic mutual inductor |
| CN202384167U (en) * | 2011-10-31 | 2012-08-15 | 许继集团有限公司 | Single-phase GIS (geographic information system) suspension structure electronic current-voltage combined transformer |
| CN202736729U (en) * | 2012-06-29 | 2013-02-13 | 中国西电电气股份有限公司 | Electronic current and voltage transformer for 126kV GIS (Global Information System) |
| CN203774078U (en) * | 2014-01-02 | 2014-08-13 | 国家电网公司 | Multiple output electronic type current and voltage combined mutual inductor used for GIS (Gas Insulated Switchgear) |
| CN204964597U (en) * | 2015-09-09 | 2016-01-13 | 福州怡辉电力设备有限公司 | Electronic current and voltage combined transformer |
-
2016
- 2016-02-03 CN CN201610074497.0A patent/CN105761913B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11317312A (en) * | 1998-05-06 | 1999-11-16 | Hitachi Ltd | Phase separating type gis directly coupled three phase transformer |
| KR20030042938A (en) * | 2001-11-26 | 2003-06-02 | 김연수 | meter transformer for construction multi contactor from input terminal and plastic operation method thereof |
| CN201918255U (en) * | 2010-11-26 | 2011-08-03 | 江苏思源赫兹互感器有限公司 | Combined type electronic mutual inductor |
| CN202384167U (en) * | 2011-10-31 | 2012-08-15 | 许继集团有限公司 | Single-phase GIS (geographic information system) suspension structure electronic current-voltage combined transformer |
| CN202736729U (en) * | 2012-06-29 | 2013-02-13 | 中国西电电气股份有限公司 | Electronic current and voltage transformer for 126kV GIS (Global Information System) |
| CN203774078U (en) * | 2014-01-02 | 2014-08-13 | 国家电网公司 | Multiple output electronic type current and voltage combined mutual inductor used for GIS (Gas Insulated Switchgear) |
| CN204964597U (en) * | 2015-09-09 | 2016-01-13 | 福州怡辉电力设备有限公司 | Electronic current and voltage combined transformer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110850137A (en) * | 2018-08-21 | 2020-02-28 | 西安西电高压开关有限责任公司 | Electronic transformer and data processing method |
| CN110850137B (en) * | 2018-08-21 | 2022-07-12 | 西安西电高压开关有限责任公司 | Electronic transformer and data processing method |
| CN112714606A (en) * | 2020-12-29 | 2021-04-27 | 安徽盛世天朗软件科技有限公司 | Data transmission electromagnetic interference prevention device for network equipment and implementation method thereof |
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| CN105761913B (en) | 2017-07-18 |
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