CN201812668U - Electronic type current and voltage combined mutual inductor of three-phase enclosed GIS (Geographic Information System) - Google Patents
Electronic type current and voltage combined mutual inductor of three-phase enclosed GIS (Geographic Information System) Download PDFInfo
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- CN201812668U CN201812668U CN2010205351533U CN201020535153U CN201812668U CN 201812668 U CN201812668 U CN 201812668U CN 2010205351533 U CN2010205351533 U CN 2010205351533U CN 201020535153 U CN201020535153 U CN 201020535153U CN 201812668 U CN201812668 U CN 201812668U
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Abstract
The utility model discloses an electronic type current and voltage combined mutual inductor of a three-phase enclosed GIS (Geographic Information System), which comprises a tank body, bobbinless coils, low-power current transformers, capacitance potential-dividing rings, shielding cylinders, a sealing terminal board, a remote end module, a basic insulator, primary conductors and a box body, wherein an air chamber is formed inside the tank body, and the top of the tank body is provided with an opening; the three shielding cylinders are arranged in the air chamber in an equilateral triangle shape, and the middle section of each shielding cylinder is formed with a bulge ring; the three primary conductors respectively pass through the axes of the three shielding cylinders; the three capacitance potential-dividing rings are respectively fixed at the inner sides of the bulge rings of the three shielding cylinders, and the three bobbinless coils and the three low-power current transformers are respectively fixed on the outer sides of the three shielding cylinders; the sealing terminal board with a plug covers the opening of the tank body, and the remote module is arranged above the sealing terminal board and respectively connected with the signal output lines of the bobbinless coils, the low-power current transformers and the capacitance potential-dividing rings. The electronic type current and voltage combined mutual inductor combines the functions of the three-phase current/voltage transformer together, and has high measurement precision.
Description
Technical field
The utility model belongs to power transmission and transforming equipment High-Voltage Electrical Appliances field; relate to a kind of electronic current voltage combination transformer; relate in particular to a kind of electronic current voltage combination transformer that is used for three-phase combined type gas insulated switch (GIS), it is applicable to electric energy metrical, relaying protection and the electric quantity monitoring that adopts three-phase combined type gas insulated switch transformer station.
Background technology
GIS (Gas Insulated Switchgear, gas-insulated switch) be that the required elements of power transmission and transformation such as circuit breaker, isolating/grounding switch, current/voltage instrument transformer and bus are sealed in high pressure combined electrical apparatus in the gas-insulated metal shell, GIS has characteristics such as compact conformation, floor space be little, easy for installation, reliable, non-maintaining.For many years, current transformer that uses among the GIS and voltage transformer are induction, development along with intelligent grid, electromagnetic transformer can not adapt to the demand of power system development, specifically, electromagnetic transformer has following defective: 1. big, the Heavy Weight of insulation system complexity, volume; 2. the non-linear dynamic range of current transformer that causes of magnetization curve unshakable in one's determination is little, and particularly contain under the fault current effect of attenuating dc component current transformer at big electric current easily saturated; 3. ferro resonance easily takes place in voltage transformer; 4. Current Transformer Secondary open circuit and voltage transformer secondary short circuit all can bring harm to equipment and personnel; 5. the error of instrument transformer is relevant with load, and load variations may cause instrument transformer overproof; 6. current transformer and voltage transformer can not be combined into one; 7. the output of electromagnetic transformer can not be directly and digitlization secondary device interface, can not adapt to the demand of digital transformer substation development.
Development along with digital transformer substation, require primary equipment realization digitlizations such as instrument transformer, electronic mutual inductor has that volume is little, in light weight, dynamic range is big, no ferro resonance danger, no CT second open circuit and advantage such as the PT second short circuit endangers and the error of instrument transformer and load have nothing to do, and can adapt to the application demand of digital transformer substation.
66kV and 110kV gas-insulated switch extensively adopt the three-phase combined type structure, use based on the existing engineering of the three-phase combined type GIS electronic current mutual inductor of hollow coil and LPCT at present, but the mode that three-phase combined type GIS electronic type voltage transformer still adopts conventional voltage transformer to add data acquisition on the spot realizes, shortcomings such as ferro resonance easily take place this kind structure can not to solve conventional voltage transformer on the one hand, and can not realize the current/voltage combined instrument transformer, can not adapt to the growth requirement of digital transformer substation well.
Based on above-mentioned analysis, the design people furthers investigate at the situation that does not also have three-phase combined type GIS electronic current voltage combination transformer at present both at home and abroad, and this case produces thus.
The utility model content
Main purpose of the present utility model is to provide a kind of three-phase combined type GIS electronic current voltage combination transformer, and it can combine the function of threephase current transformer and threephase potential transformer, and the certainty of measurement height.
In order to reach above-mentioned purpose, solution of the present utility model is:
A kind of three-phase combined type GIS electronic current voltage combination transformer comprises a tank body, three hollow coils, three low-power current transformers, three capacitance partial pressure rings, three shielding cylinders, a sealed end daughter board, three remote end modules, two disc insulators, three Primary Conductor and a casing; The inside of tank body forms air chamber, and the top offers opening; Three shielding cylinders are fixed in the air chamber, and are equilateral triangle and arrange, and the formation bulge loop is also protruded in the stage casing of each shielding cylinder; Two disc insulators are located at the both sides of tank body respectively; Three Primary Conductor are passed by the axle center of aforementioned three shielding cylinders respectively, and are provided with the shielding cylinder insulation, and the two ends of described Primary Conductor are individually fixed in two disc insulators of tank body both sides; Three bulge loop inboards that the capacitance partial pressure ring insulate respectively and is fixed in three shielding cylinders, and three hollow coils and three low-power current transformers are individually fixed in the outside of three shielding cylinders; Casing is inverted in the open top of tank body, and opening is ccontaining, and the sealed end daughter board of band glass sintering aviation plug is located in the casing, and the opening of tank body is covered; Remote end module is located at the top of sealed end daughter board in the casing, connects the output line of hollow coil, low-power current transformer and capacitance partial pressure ring respectively by the plug on the sealed end daughter board.
Above-mentioned current/voltage combination transformer also comprises two plum blossom plates, and two plum blossom plates vertically are located in the air chamber of tank body, and three shielding cylinders are fixed on two plum blossom plates with two ends respectively.
Above-mentioned current/voltage combination transformer also comprises two switching flanges, and these two switching flanges are individually fixed in the both sides of tank body, and two disc insulators are individually fixed in the outside of switching flange.
Adopt the SF6 gas-insulated between above-mentioned Primary Conductor and the shielding cylinder.
Above-mentioned capacitance partial pressure ring is fixed in the bulge loop inboard of shielding cylinder by the teflon insulation pad.
After adopting such scheme, the utlity model has following characteristics:
(1) the utility model utilizes hollow coil and low-power current transformer sensing primary current, utilizes capacitor voltage divider sensing primary voltage, and the shielding construction of ingenious design has solved three-phase voltage well and measured easy interactional problem;
(2) utilize remote end module to gather the output signal of three-phase current sensor/capacitor voltage divider nearby, utilize optical fiber transmission signal, structure and technology are simple, and cost is low, and volume and weight has only 1/4 of conventional current/voltage transformer;
(3) main insulation is the SF6 gas medium, and stable insulation also can be recovered, and insulation margin is big, measures when can realize three-phase current voltage;
(4) remote end module places in the shielding case body on the tank body, and the output signal of current sensor/capacitor voltage divider causes remote end module by the metal sealing terminal plate of band glass sintering aviation plug, and the influence of electromagnetic interference and VFTO is effectively suppressed;
(5) adopt low-power current transformer sensing measurement current signal, the technology that adopts hollow coil to add the hardware integration realizes the detection of protection with current signal, the precision height of current transformer (satisfy 0.2S level require), temperature stability good (can-40 ℃～+ 75 ℃ temperature range operate as normal), and have good transient characterisitics (transient error is less than 2%);
(6) technology that adopts capacitance-resistance differential voltage transducer and software and hardware integration to combine realizes once high-tension measurement, voltage measurement precision height (satisfy 0.2 grade of requirement), temperature stability good (can-40 ℃～+ 75 ℃ temperature range operate as normal), and have good transient characterisitics;
(7) dualization of remote end module redundant configuration, and the analog signal of each transducer output all adopted dualization sampling comparison techniques having avoided sampling to cause the problem of protection malfunction, reliability height unusually.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is further described.
Fig. 1 is an assembled sectional view of the present utility model;
Fig. 2 is an end view of the present utility model.
Embodiment
Below with reference to drawings and the specific embodiments, combining structure of the present utility model and operation principle are described in detail.
At first with reference to shown in Figure 1, the utility model provides a kind of three-phase combined type GIS electronic current voltage combination transformer, comprise a tank body 1, three hollow coils 2, three low-power current transformers 3, three capacitance partial pressure rings 4, three shielding cylinders 5, sealed end daughter board 6, three remote end modules 7, two switching flanges 8, two disc insulators 9, three Primary Conductor 10, two plum blossom plates 11 and casings 12, introduce respectively below.
The inside of tank body 1 forms air chamber 13, and offers opening 14 at the top, and two plum blossom plates 11 are vertical form and are located in the air chamber 13 of tank body 1.
Three shielding cylinders 5 all are located in the air chamber 13 of tank body 1, and specifically, three shielding cylinders 5 are equilateral triangle arranges, and respectively as A, B, C three-phase, and three shielding cylinders 5 are fixed on two plum blossom plates 11 with two ends respectively; The stage casing of described shielding cylinder 5 is also outwards protruded and is formed bulge loop 51.
Two switching flanges 8 are individually fixed in the both sides of tank body 1, and two disc insulators 9 are individually fixed in the outside of two switching flanges 8.
Three Primary Conductor 10 are all cylindrical, passed by the axle center of aforementioned three shielding cylinders 5 respectively, and two ends are individually fixed in the disc insulator 9 of tank body 1 both sides, wherein, adopt the SF6 gas-insulated between Primary Conductor 10 and the shielding cylinder 5.
Three capacitance partial pressure rings 4 are individually fixed in bulge loop 51 inboards of three shielding cylinders 5 by teflon insulation pad 41, each capacitance partial pressure ring 4 constitutes capacitor voltage divider with shielding cylinder 5, the Primary Conductor 10 of both sides like this, can be used for the tested primary voltage information of sensing three-phase; By analysis of electric field and actual measurement as can be known, the result that each phase voltage is measured is subjected to the influence of adjacent phase primary voltage less than 0.02%.
Three hollow coils 2 and three low-power current transformers 3 are individually fixed in the outside of three shielding cylinders 5; be used for the tested primary current information of sensing three-phase; wherein, hollow coil 2 is used for the sensing protection and uses current signal, and low-power current transformer 3 is used for the sensing measurement current signal.
Because GIS circuit breaker or isolating switch can produce transient overvoltage (VFTO) when operation, therefore sealed end daughter board 6 can be set in casing 12, described sealed end daughter board 6 is a metal material, be fixed in the open top 14 of tank body 1, opening 14 is covered, thereby can prevent the interference of VFTO effectively remote end module 7; And described sealed end daughter board 6 is provided with aviation plug.
Remote end module 7 is located in the casing 12, and be fixed in the top of sealed end daughter board 6, described remote end module 7 connects the output line of each phase hollow coil 2, low-power current transformer 3, capacitance partial pressure ring 4 respectively by the band glass sintering aviation plug on the sealed end daughter board 6, and output signal is a digital signal, and utilizes optical fiber to transmit.
During work, three-phase hollow coil 2 and low-power current transformer 3 be the tested primary current information of sensing three-phase respectively, wherein, hollow coil 2 sensings protection current signal, its output signal is the differential of tested electric current, utilize the hardware Integral Technology that the differential signal of hollow coil 2 output is carried out integral transformation again, can make the protective current signal of low-power current transformer 3 have bigger dynamic range and transient characterisitics preferably like this, satisfy the demand of relaying protection; Low-power current transformer 3 sensing measurement current signals can make the measurement current signal have higher accuracy of measurement like this, satisfy the demand of electric energy metrical; And the tested primary voltage information of the three phase capacitance voltage divider that capacitance partial pressure ring 4, shielding cylinder 5 and Primary Conductor 10 are constituted difference sensing three-phase; Three-phase hollow coil 2, low-power current transformer 3 and three phase capacitance voltage divider are designed in same tank body 1 herein, measure when can realize three-phase primary current and voltage; Utilize remote end module 7 in-site collectings then and handle the output signal of three-phase hollow coil 2, low-power current transformer 3 and three phase capacitance voltage divider, and utilize optical fiber output digital signal.
Need to prove, capacitance partial pressure ring 4 is individually fixed in bulge loop 51 inboards of shielding cylinder 5 by dielectric, wherein, capacitance partial pressure ring 4 constitutes high-voltage capacitance C1 with cylindrical Primary Conductor 10, the medium of this high-voltage capacitance is a SF6 gas, capacitance partial pressure ring 4 constitutes low-voltage capacitance C2 with shielding cylinder 5 simultaneously, and the appearance value of this low-voltage capacitance is subject to the influence of output line distributed capacitance.In the present embodiment, for stability and the transient performance that improves voltage measurement, at the two ends of low-voltage capacitance and meet the little resistance precision resistance R that a temperature coefficient is 5ppm (precision resistance R designs in remote end module 7), R is much smaller than the capacitive reactance of C2
The signal that is obtained by the resistance R two ends is the differential of tested primary voltage
Utilize remote end module 7 that it is carried out the information that integral transformation just can be known primary voltage.
The technology of utilizing the software integration to combine with the hardware integration is carried out integral transformation to the output signal of voltage sensor, because software integral temperature good stability but transient response poor-performing, hardware integration transient response performance is good but temperature stability can not satisfy measurement requirement, so the technology that adopts the software and hardware integration to combine is carried out integral transformation to the output signal of voltage sensor, can make voltage transformer have higher certainty of measurement, temperature stability and transient performance preferably.
In addition, the utility model is when practical application, the three-phase current sensor that hollow coil 2 and low-power current transformer 3 constitute is individually fixed in the outside of phase shielded tube 5, wherein, the specified secondary output of hollow coil 2 and low-power current transformer 3 is 0.5V, capacitance partial pressure ring 4 in the three phase capacitance voltage divider is fixed in bulge loop 51 inboards of phase shielded tube 5 respectively by dielectric, high-voltage capacitance is 11.2pF, low-voltage capacitance is 1.21nF, the specified secondary of three phase capacitance voltage divider is output as 1V, the output signal of three-phase current sensor and three phase capacitance voltage divider causes same remote end module 7 by the metal sealing terminal plate 6 of band glass sintering aviation plug, this remote end module 7 places in the shielding case body 12 on the tank body 1, and the working power of remote end module 7 is provided by 110V in the convergence control cabinet or 220V DC power supply, the interface size that changes switching flange 8 can make the utility model be used for the GIS of different manufacturers, and three-phase Primary Conductor 10 is fixed between two disc insulators 9.
Above embodiment only is explanation technological thought of the present utility model; can not limit protection range of the present utility model with this; every according to the technological thought that the utility model proposes, any change of being done on the technical scheme basis all falls within the utility model protection range.
Claims (5)
1. a three-phase combined type GIS electronic current voltage combination transformer is characterized in that: comprise a tank body (1), three hollow coils (2), three low-power current transformers (3), three capacitance partial pressure rings (4), three shielding cylinders (5), a sealed end daughter board (6), a remote end module (7), two disc insulators (9), three Primary Conductor (10) and a casing (12); The inside of tank body (1) forms air chamber (13), and the top offers opening (14); Three shielding cylinders (5) are fixed in the air chamber (13), and are equilateral triangle and arrange, and the stage casing of each shielding cylinder (5) is also protruded and formed bulge loop (51); Two disc insulators (9) are located at the both sides of tank body (1) respectively; Three Primary Conductor (10) are passed by the axle center of aforementioned three shielding cylinders (5) respectively, and are provided with shielding cylinder (5) insulation, and the two ends of described Primary Conductor (10) are individually fixed in two disc insulators (9) of tank body (1) both sides; Bulge loop (51) inboard that three capacitance partial pressure rings (4) insulate respectively and are fixed in three shielding cylinders (5), and three hollow coils (2) and three low-power current transformers (3) are individually fixed in the outside of three shielding cylinders (5); Casing (12) is inverted in the open top (14) of tank body (1), and opening (14) is ccontaining, and the sealed end daughter board (6) of band glass sintering aviation plug is located in the casing (12), and the opening (14) of tank body (1) is covered; Remote end module (7) is located at the top of the interior sealed end daughter board of casing (12) (6), connects the output line of each hollow coil (2), low-power current transformer (3) and capacitance partial pressure ring (4) respectively by the plug on the sealed end daughter board (6).
2. three-phase combined type GIS electronic current voltage combination transformer as claimed in claim 1, it is characterized in that: described current/voltage combination transformer also comprises two plum blossom plates (11), two plum blossom plates (11) vertically are located in the air chamber (13) of tank body (1), and three shielding cylinders (5) are fixed on two plum blossom plates (11) with two ends respectively.
3. three-phase combined type GIS electronic current voltage combination transformer as claimed in claim 1, it is characterized in that: described current/voltage combination transformer also comprises two switching flanges (8), these two switching flanges (8) are individually fixed in the both sides of tank body (1), and two disc insulators (9) are individually fixed in the outside of switching flange (8).
4. three-phase combined type GIS electronic current voltage combination transformer as claimed in claim 1 is characterized in that: adopt the SF6 gas-insulated between described Primary Conductor (10) and the shielding cylinder (5).
5. three-phase combined type GIS electronic current voltage combination transformer as claimed in claim 1 is characterized in that: described capacitance partial pressure ring (4) is fixed in bulge loop (51) inboard of shielding cylinder (5) by teflon insulation pad (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205351533U CN201812668U (en) | 2010-09-16 | 2010-09-16 | Electronic type current and voltage combined mutual inductor of three-phase enclosed GIS (Geographic Information System) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205351533U CN201812668U (en) | 2010-09-16 | 2010-09-16 | Electronic type current and voltage combined mutual inductor of three-phase enclosed GIS (Geographic Information System) |
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| Publication Number | Publication Date |
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| CN201812668U true CN201812668U (en) | 2011-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010205351533U Expired - Lifetime CN201812668U (en) | 2010-09-16 | 2010-09-16 | Electronic type current and voltage combined mutual inductor of three-phase enclosed GIS (Geographic Information System) |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496447A (en) * | 2011-12-01 | 2012-06-13 | 中国西电电气股份有限公司 | Electronic single-phase current voltage transformer for gas insulated metal-closed switchgear |
| CN102637516A (en) * | 2012-04-27 | 2012-08-15 | 南京南瑞继保电气有限公司 | Shielding barrel used for GIS (Geographic Information System) electronic type current mutual inductor |
| CN102914678A (en) * | 2011-09-26 | 2013-02-06 | 北京航天时代光电科技有限公司 | Tank-type tri-phase optical voltage transformer |
| CN103021646A (en) * | 2012-09-03 | 2013-04-03 | 常州博瑞电力自动化设备有限公司 | Electronic current/voltage transformer-shielding cylinder for GISes (gas-insulated switchgears) |
| CN103364605A (en) * | 2012-03-27 | 2013-10-23 | 成都驹涛网络科技有限公司 | Novel photoelectric integrated current/voltage mutual inductor |
| CN103713175A (en) * | 2013-12-24 | 2014-04-09 | 北京航天时代光电科技有限公司 | Combined optical transformer for novel GIS |
| CN103941165A (en) * | 2014-04-22 | 2014-07-23 | 中国能源建设集团广东省电力设计研究院 | GIS equipment testing device and method |
| CN104569515A (en) * | 2014-12-11 | 2015-04-29 | 许继集团有限公司 | Shielding structure and common-tank electronic voltage transformer adopting same |
| 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 |
| CN113674973A (en) * | 2021-07-05 | 2021-11-19 | 中国长江电力股份有限公司 | Ferromagnetic resonance elimination circuit of GIS voltage transformer |
| CN117949722A (en) * | 2024-03-26 | 2024-04-30 | 山东泰开互感器有限公司 | Current and voltage measuring device and gas-insulated switchgear |
-
2010
- 2010-09-16 CN CN2010205351533U patent/CN201812668U/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914678A (en) * | 2011-09-26 | 2013-02-06 | 北京航天时代光电科技有限公司 | Tank-type tri-phase optical voltage transformer |
| CN102914678B (en) * | 2011-09-26 | 2013-06-05 | 北京航天时代光电科技有限公司 | Tank-type tri-phase optical voltage transformer |
| CN102496447B (en) * | 2011-12-01 | 2015-04-22 | 中国西电电气股份有限公司 | Electronic single-phase current voltage transformer for gas insulated metal-closed switchgear |
| CN102496447A (en) * | 2011-12-01 | 2012-06-13 | 中国西电电气股份有限公司 | Electronic single-phase current voltage transformer for gas insulated metal-closed switchgear |
| CN103364605A (en) * | 2012-03-27 | 2013-10-23 | 成都驹涛网络科技有限公司 | Novel photoelectric integrated current/voltage mutual inductor |
| CN102637516A (en) * | 2012-04-27 | 2012-08-15 | 南京南瑞继保电气有限公司 | Shielding barrel used for GIS (Geographic Information System) electronic type current mutual inductor |
| CN103021646A (en) * | 2012-09-03 | 2013-04-03 | 常州博瑞电力自动化设备有限公司 | Electronic current/voltage transformer-shielding cylinder for GISes (gas-insulated switchgears) |
| CN103713175A (en) * | 2013-12-24 | 2014-04-09 | 北京航天时代光电科技有限公司 | Combined optical transformer for novel GIS |
| CN103941165B (en) * | 2014-04-22 | 2018-05-01 | 中国能源建设集团广东省电力设计研究院有限公司 | GIS device experimental rig and method |
| CN103941165A (en) * | 2014-04-22 | 2014-07-23 | 中国能源建设集团广东省电力设计研究院 | GIS equipment testing device and method |
| CN104569515A (en) * | 2014-12-11 | 2015-04-29 | 许继集团有限公司 | Shielding structure and common-tank electronic voltage transformer adopting same |
| CN104569515B (en) * | 2014-12-11 | 2017-08-08 | 许继集团有限公司 | A kind of shielding construction and the common case electronic type voltage transformer using this structure |
| 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 |
| CN113674973A (en) * | 2021-07-05 | 2021-11-19 | 中国长江电力股份有限公司 | Ferromagnetic resonance elimination circuit of GIS voltage transformer |
| CN117949722A (en) * | 2024-03-26 | 2024-04-30 | 山东泰开互感器有限公司 | Current and voltage measuring device and gas-insulated switchgear |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
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Granted publication date: 20110427 |