CN101073994A - Contact network system of high-speed electric railway - Google Patents
Contact network system of high-speed electric railway Download PDFInfo
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- CN101073994A CN101073994A CN 200710018079 CN200710018079A CN101073994A CN 101073994 A CN101073994 A CN 101073994A CN 200710018079 CN200710018079 CN 200710018079 CN 200710018079 A CN200710018079 A CN 200710018079A CN 101073994 A CN101073994 A CN 101073994A
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Abstract
The invention is concerned with a contact net system of high-speed electrical railroad made of some anchoring segments connecting with each other. Each anchoring segment relates to positioning device to wrist and arm, anchoring compensator, electric connecting equipment, suspension bowstring equipment and mid-point anchor equipment. The anchoring compensator sets at the two ends of each anchoring segment and the mid-point anchor equipment sets at the middle part of each anchoring segment. The connecting equipment of electricity sets at the inside of anchoring compensator and between the anchoring compensator and mid-point anchor equipment. Each anchoring segment has some positioning devices to wrist and arm and suspension bowstring equipments. It is fit to sustain, suspend, locate, machine, electric connecting and terminal anchoring to contact net system of electrical railroad with 200km/h, 50Hz single-phase and 25kV alternating current.
Description
Technical field
The utility model relates to a kind of contact network system of high-speed electric railway, is adapted to the high-speed electric railway system of speed per hour 200km/h.
Background technology
The electrification railway contact net parts early stage of development, only simply satisfy the needs of safe operation, the tension force of contact wire and catenary is less: main track catenary 14.7kN; Main track contact wire 8.5kN; Catenary Fittings are independent design, production, use, do not consider the phylogenetic relationship such as cooperatively interact between the various products, and part is by the design of different designs unit, different production unit manufacturing, and installing supporting by unit in charge of construction during use is a system.Cause the product interface to exist many unreasonable factors, influenced the current carrying quality and the running velocity of locomotive.This stage overhead contact line mode is simple overhead contact line with catenary, the bracket device adopts the tension and compression tubular construction, and steady arm is non-spacing pattern, and the tension force and the sag of lead are bigger with temperature Change, contact system elasticity is inhomogeneous, and the running velocity that has limited locomotive only is about 80～120km/h.Along with the raising of updating to the maintenance and renovation of existing line and Catenary Fittings design, production technology, new old product conllinear uses very general, though the performance of single product improves, but still be scattered supply, mounting means is various, do not have systematicness, the running velocity of locomotive can only be brought up to 160km/h.In recent years, railway was constantly towards the high speed development, but existing scattered electrified contacting nets part can't satisfy the high-speed cruising requirement.
Summary of the invention
The technical matters that the utility model patent solves: design a kind of contact network system of high-speed electric railway, consider design, the relation of using, cooperatively interact of Catenary Fittings from the brand new angle, through after existing Catenary Fittings be optimized, improve raising, fully studied mutual matching relationship, with definite best of breeds such as finite element analysis computation, analogue simulations, thereby form cover BJ200 series complete, excellent performance contact net system.Be specially adapted to play in the single-phase 50Hz of 200km/h electrified railway, the 25kV alternating current gasification railway contact line supports, suspention, location, mechanical and be electrically connected, effect such as terminal is casted anchor.
Technical solution of the present invention: a kind of contact network system of high-speed electric railway, interconnected by a plurality of anchor sections and to form, each anchor section comprises bracket registration device 34, the compensating device 35 that casts anchor, arrangements of electric connection 36, dropper device 37 and centre anchor device 38.The compensating device 35 that casts anchor is arranged on the two ends of each anchor section, centre anchor device 38 is arranged on the middle part of each anchor section, arrangements of electric connection 36 is arranged on the inboard of the compensating device 35 that casts anchor, casting anchor between compensating device 35 and the centre anchor device 38, each anchor section is provided with a plurality of bracket registration devices 34 and dropper device 37.
Each anchor section of described system also comprises wired trouble 39, and line trouble 39 is arranged on and casts anchor between compensating device 35 and the centre anchor device 38, and is positioned at the top of electrified railway rail switch.
The spacing of adjacent two the bracket registration devices 34 of each anchor section of described system is 35-45m, and the spacing of adjacent two the dropper devices 37 of each anchor section is 7.5-8.5m.
Described system is interconnected by a plurality of anchor sections and forms.
Desired location is fixed, hung on to the bracket registration device 34 of system of the present invention with contact wire 40 and catenary 41; The compensating device 35 that casts anchor provides tension force for contact wire 40, catenary 41; 36 of arrangements of electric connections are responsible for contact wire 40, catenary 41 provides electric power; Dropper device 37 is connected between contact wire 40, the catenary 41, improves the elasticity of contact system so that the locomotive high-speed cruising is steadily got stream; Centre anchor device 38 prevents contact wire 40, catenary 41 broken strings; Six sub-devices cooperatively interact, common guarantee contact system safe, reliable.
The technical solution of sub-device of the present invention is:
1, bracket registration device 34 is formed triangular structure by Horizontal Cantilever 1, oblique wrist and arm 2, Horizontal Cantilever 1 cantilever one end supports catenary 41 by Messenger Wire base 3, the other end links to each other with strut insulator 4, and cooperatively interact with strut insulator 4 (by welded nut and bolt).Oblique wrist and arm 2 one ends are monaural, support Horizontal Cantilever 1 by bushing double eye 5, and the other end links to each other with strut insulator 4, and every cover oblique wrist and arm 2 all contains a cover bracket and supports 6.Every cover bracket support 6 links to each other with oblique wrist and arm 2 with Horizontal Cantilever 1 respectively by two cover sleeve pipe ears 5.Registration arm 7 one ends of registration device are connected with oblique wrist and arm 2 by steady ring 8, and the other end is connected with oblique wrist and arm 2 by registration arm support 9, or employing registration arm clamp 10, registration arm lateral conductor 11 are connected with Messenger Wire base 3.Positioning support 12 is connected steady arm 13 with registration arm 7, by the fixing contact wire 40 of steady ear 14.
The technical performance parameter:
1. the maximum horizontal work loading at catenary 41 hitch point places should ≮: work is for 2.0kN; Non-of transition mast is 3.5kN;
2. the maximum vertical work load at catenary 41 hitch point places should ≮: work is for 2.0kN; Non-of transition mast is 3.0kN;
3. the maximum horizontal work loading at contact wire 40 locating point places should ≮: work is for 2.0kN; Non-of transition mast is 4.5kN;
2, cast anchor compensating device 35 adopts non-maintaining assembly pulley compensating device 15 compensation in 1: 2,1: 3 or escapement 16 compensation.Non-maintaining assembly pulley compensating device 15 and intercolumniation by hold anchor angle steel 17 (concrete pillar) or steel anchor angle steel 18 (steel column), special type dicyclo bar 19, D connector is connected 20; Compensation pulley group 15 adopts bar with ball and eye 21, termination fitting for catenary 22, termination fitting for contact wire 23 to be connected with circuit catenary 41, contact wire 40 respectively and casts anchor, can automatically regulating and guarantee the tension force of clue.
The technical performance parameter:
1. working tension and transmitting ratio:
Catenary 41 working tensions: 15kN; Nominal transmitting ratio: 1: 3
Contact wire 40 working tensions: 13kN; Nominal transmitting ratio: 1: 3
2. wire compensation range of temperatures :-40 ℃～+ 80 ℃
3. contact suspension anchor segment length: 2 * 900m.
4. the assembly pulley compensating device requires compensation flexibly, and is safe and reliable, driving efficiency: time 〉=97% that rises is cut or polish jade with an emery wheel in bob, weighs down stone roller decline time 〉=98%.Useful life period, is interior without maintaining
3, arrangements of electric connection 36 is divided into transverse electric and connects and vertically electrical connection according to the difference of its use location.Main link comprises electrically connecting clamp for contact wire 25 and catenary electrically connecting clamp 26 except that electric connection line 24.Electrically connecting clamp for contact wire 25 is made up of line ball clamping plate and clamping plate, and is easy for installation, and the area of contact of raising and contact wire 40 reduces contact resistance.Applicable to being electrically connected between multiple annealed copper strand wire electric connection line 24 and copper, magnesium copper, the silver-bearing copper contact wire 40.Catenary electrically connecting clamp 26 adopts and the ditch forms, is applicable to being electrically connected between multiple annealed copper strand wire electric connection line 24 and the copper alloy catenary 41.Circuit between each sectional power supply of contact suspension is coupled together, guarantee the unimpeded of circuit, realize parallel operation, reduce electric energy loss and improve quality of power supply by being electrically connected.
The technical performance parameter:
1. the sliding load of 41 of electrically connecting clamp and contact wire 40 or catenarys is not less than: 4.0kN.
2. the sliding load between electrically connecting clamp and electric connection line is not less than: 2.0kN.
3. continuous current-carrying capacity ≮ 540A, 5min crosses current-carrying capacity ≮ 760A.
4, dropper device 37 is one of important composition parts of overhead contact line with catenary class part, comprises dropper 27 (whole, adjustable, slip), selects for use according to its difference in the span centre position.Adopt the version and the asymmetric crimp technology of heart-shaped retaining ring and the compound hinge joint of suspension ring, the dropper line is inserted heart-shaped retaining ring avoid wearing and tearing.In order to guarantee the reliability of dropper water conservancy diversion, adopt the copper connecting clamp of T2, will couple together between dropper line and catenary hanger ear, the contact wire hanger ear.Be connected with strand ring between the suspension ring by aluminium hydraulic pressed connecting pipe, heart-shaped retaining ring and can guarantee good electric property, form and independently be electrically connected the loop.The length of regulating the dropper line can guarantee the system height of contact suspension and contact wire 40 operating altitude apart from rail level, increases the hitch point of contact wire 40, improves the current mass of getting of block of bow collector of electric locomotive.
The technical performance parameter:
1. maximum vertical work load: 1.3kN
2. the sliding load of 41 of wire clamp and contact wire 40 and catenarys: 1.0kN
3. the sliding load between wire clamp and the dropper line: 3.9kN
5, centre anchor device 38 is divided into three and strides anti-breaking formula mid point anchor and two and stride anti-channeling formula mid point anchor, and main union piece has Mid-point clamp for messenger wire 28, contact wire mid point anchor clamp (three stride) 29 and contact wire mid point anchor clamp (two stride) 30.Contact wire mid point anchor clamp (three stride) 29, (two stride) 30 adopt silicon bronze alloy forging, corrosion-resistant steel clamping plate to connect, in two clamping plate circular arcs screw thread is arranged all, clamping contact wire part all has bidentate shape, thimble compression joint type structure, improved that the copper alloy anchor is tied knots and contact wire 40 between sliding load; Mid-point clamp for messenger wire 28 is made up of the upper, middle and lower clamping plate, connect and adopt straight bolt, overcome the tooth form portion defective of foundry technique, in three clamping plate circular arcs all die forging tooth form is arranged, applicable to multiple copper alloy anchor tie knots and copper, magnesium copper, silver-bearing copper contact wire 40 or copper alloy catenary 41 between anchor connection.
The technical performance parameter:
1. the maximum horizontal work loading between mid point anchor clamp and clue is: 16.5kN.
2. the sliding load between mid point anchor clamp and clue is not less than: 24.5kN.
3. the horizontal destructive load of mid point anchor clamp is not less than: 49.5kN.
6, line trouble 39 steady ears 33 by a limiter tube 31 and fixed constraints pipe 31, bolt 32 are formed.Fixing at two contact wire infalls by steady ear 33 usefulness limiter tubes 31, hand over contact wire 40 to press close to mutually two-phase by limiter tube 31, when raising, top contact wire 40 can utilize the contact wire 40 of limiter tube 31 below driving to raise simultaneously, to eliminate the discrepancy in elevation of beginning contact two leads, thereby guarantee block of bow collector of electric locomotive safety, transit to another contact wire 40 by a contact wire 40 smoothly, reach the purpose of conversion line.
The technical performance parameter:
1. line trouble center maximum vertical work load is 0.18kN.
2. allow deflection degree to be not more than 1.5%L (L is the length of line trouble).
Advantage that the present invention compared with prior art has and effect:
1, novelty of the present invention has proposed the Catenary Fittings system integration, consider design, the relation of using, cooperatively interact of Catenary Fittings from the brand new angle, through after existing Catenary Fittings be optimized, improve raising, fully studied mutual matching relationship, with definite best of breeds such as finite element analysis computation, analogue simulations, and by facts have proved of several circuits, thereby cover BJ200 series complete, excellent performance the contact net system that forms.
2, the present invention improves catenary property by this combination of systematization, integrated formation greatly, can satisfy 200km/h circuit operating needs fully, will make huge contribution for the development of Chinese high-speed electric railway.
3, six sub-devices of the present invention use that cooperatively interacts, common guarantee contact system safe, reliably reach 200km/h circuit operating needs, be specially adapted to play in the single-phase 50Hz of 200km/h electrified railway, the 25kV alternating current gasification railway contact line supports, suspention, location, mechanical and be electrically connected, effect such as terminal is casted anchor.
Description of drawings
Fig. 1 is a structural front view of the present invention,
Fig. 2 is a structure birds-eye view of the present invention,
Fig. 3 is the structural representation of bracket registration device of the present invention,
Fig. 4 is the cast anchor structural representation of compensating device of the non-maintaining assembly pulley of the present invention,
Fig. 5 is the cast anchor structural representation of compensating device of ratchet of the present invention
Fig. 6 is the structural representation of arrangements of electric connection of the present invention,
Fig. 7 is the structural representation of dropper device of the present invention,
Fig. 8 is the structural representation of line trouble of the present invention,
Fig. 9 is the structural representation that the present invention three strides anti-breaking formula centre anchor device,
Figure 10 strides the structural representation of anti-channeling formula centre anchor device for the present invention two.
The specific embodiment
1,2,3,4,5,6,7,8,9,10 a kind of embodiment of the present invention is described in conjunction with the accompanying drawings.
A kind of contact network system of high-speed electric railway is interconnected by a plurality of anchor sections and to form.Each anchor section comprises bracket registration device 34, the compensating device 35 that casts anchor, arrangements of electric connection 36, dropper device 37, centre anchor device 38 and line trouble 39.The compensating device 35 that casts anchor is arranged on the two ends of each anchor section, centre anchor device 38 is arranged on the middle part of each anchor section, arrangements of electric connection 36 is arranged on the inboard of the compensating device 35 that casts anchor, casting anchor between compensating device 35 and the centre anchor device 38, each anchor section is provided with a plurality of bracket registration devices 34 and dropper device 37.The spacing of adjacent two the bracket registration devices 34 of each anchor section is 35-45m, and the spacing of adjacent two the dropper devices 37 of each anchor section is 7.5-8.5m.Line trouble 39 is arranged on casts anchor between compensating device 35 and the centre anchor device 38, and is positioned at the top of electrified railway rail switch.
Bracket registration device 34 is installed in pillar top, is used to support contact suspension, and contact wire 40, catenary 41 hung is positioned in the design-calculated spatial dimension, and the load of contact suspension is delivered on the pillar.The compensating device 35 that casts anchor is installed in pillar top, and each strides contact wire 40, catenary 41 two ends to be connected contact system, and automatically regulating contact wire 40, catenary 41 degree of speeding also guarantee the tension force of clue.Arrangements of electric connection 36 is used for the circuit between each sectional power supply of contact suspension is coupled together, and guarantees the unimpeded of circuit, is installed between multiple annealed copper strand wire and copper, magnesium copper, the silver-bearing copper contact wire 40 or between multiple annealed copper strand wire and the copper alloy catenary 41.Dropper device 37 is installed between contact wire 40, the catenary 41, and gives catenary 41 with the weight transmitting of contact wire 40, increases the hitch point of contact wire 40, can improve the current mass of getting of motorcycle pantograph.Centre anchor device 38 is installed on the midway location of an anchor section of contact system, is used to prevent contact system clue broken string and makes the destruction of contact system clue broken string back contact system be controlled at certain limit.Line trouble 39 is installed between two contact wires 40 above the track switch, guarantees that pantograph safety transits to another contact wire 40 by a contact wire 40 smoothly, reaches the conversion purpose, guarantees that two contact wires 40 are contour substantially in the beginning contact.
Claims (4)
1, a kind of contact network system of high-speed electric railway, interconnect by a plurality of anchor sections and to form, each anchor section comprises bracket registration device (34), compensating device (35) casts anchor, arrangements of electric connection (36), dropper device (37) and centre anchor device (38), it is characterized in that: the compensating device that casts anchor (35) is arranged on the two ends of each anchor section, centre anchor device (38) is arranged on the middle part of each anchor section, arrangements of electric connection (36) is arranged on the inboard of the compensating device that casts anchor (35), be positioned between compensating device that casts anchor (35) and the centre anchor device (38), each anchor section is provided with a plurality of bracket registration devices (34) and dropper device (37).
2, contact network system of high-speed electric railway according to claim 1, it is characterized in that: each anchor section of described system also comprises wired trouble (39), and line trouble (39) is arranged between compensating device that casts anchor (35) and the centre anchor device (38), and is positioned at the top of electrified railway rail switch.
3, contact network system of high-speed electric railway according to claim 1 is characterized in that: the spacing of adjacent two the bracket registration devices of each anchor section (34) is 35-45m, and the spacing of adjacent two the dropper devices of each anchor section (37) is 7.5-8.5m.
4, according to claim 1 or 2 or 3 described contact network system of high-speed electric railway, it is characterized in that: described system is interconnected by a plurality of anchor sections and forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710018079 CN101073994A (en) | 2007-06-19 | 2007-06-19 | Contact network system of high-speed electric railway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710018079 CN101073994A (en) | 2007-06-19 | 2007-06-19 | Contact network system of high-speed electric railway |
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| CN101073994A true CN101073994A (en) | 2007-11-21 |
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| CN 200710018079 Pending CN101073994A (en) | 2007-06-19 | 2007-06-19 | Contact network system of high-speed electric railway |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102756671A (en) * | 2012-08-13 | 2012-10-31 | 中铁第一勘察设计院集团有限公司 | Trunk line electrification contact system in strong wind environment and parameter determination method thereof |
| CN104210385A (en) * | 2014-08-19 | 2014-12-17 | 吉林大学 | Electrified railway power grid system without negative sequence or spaced power supply networks in whole process |
| CN105301986A (en) * | 2015-11-30 | 2016-02-03 | 中铁电气化勘测设计研究院有限公司 | Railway catenary spatial position simulation platform |
| CN106937091A (en) * | 2017-04-01 | 2017-07-07 | 中铁第勘察设计院集团有限公司 | The monitoring system of the flexible mobile catenary of horizontal rotation |
| CN106938619A (en) * | 2017-04-01 | 2017-07-11 | 中铁第勘察设计院集团有限公司 | Cargo handling sidesway contact net system |
| CN107856578A (en) * | 2017-07-23 | 2018-03-30 | 浙江维思无线网络技术有限公司 | A kind of anchor field offset recognition methods and device |
| CN109649220A (en) * | 2018-12-21 | 2019-04-19 | 中国铁路设计集团有限公司 | A kind of Chinese Industrial Standards (CIS) contact net system |
| CN109733250A (en) * | 2019-01-31 | 2019-05-10 | 中国铁路设计集团有限公司 | A kind of contact net system based on composite wrist-arm |
| CN110145159A (en) * | 2019-06-25 | 2019-08-20 | 中铁八局集团电务工程有限公司 | A kind of hard crossbeam of the contact net of welded connecting and its construction method |
| CN112721746A (en) * | 2021-02-02 | 2021-04-30 | 中铁二院工程集团有限责任公司 | Integral dropper device suitable for large-carrying-capacity electrified railway contact network system |
| CN112776677A (en) * | 2021-02-02 | 2021-05-11 | 西南交通大学 | Electrified railway contact net suspension structure suitable for big current-carrying capacity |
| CN113511112A (en) * | 2021-06-16 | 2021-10-19 | 中铁建电气化局集团南方工程有限公司 | Construction structure and method for simultaneously connecting double-circuit contact networks |
| CN113804340A (en) * | 2021-09-10 | 2021-12-17 | 中国国家铁路集团有限公司 | Contact net compensation device state abnormity identification method and device |
| CN114161998A (en) * | 2022-01-01 | 2022-03-11 | 孟庆伟 | Highway with power supply track |
| CN108909531B (en) * | 2018-08-02 | 2023-11-21 | 中铁高铁电气装备股份有限公司 | Integral type anti-location support hangs cantilever device |
-
2007
- 2007-06-19 CN CN 200710018079 patent/CN101073994A/en active Pending
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102756671B (en) * | 2012-08-13 | 2014-08-13 | 中铁第一勘察设计院集团有限公司 | Trunk line electrification contact system in strong wind environment and parameter determination method thereof |
| CN102756671A (en) * | 2012-08-13 | 2012-10-31 | 中铁第一勘察设计院集团有限公司 | Trunk line electrification contact system in strong wind environment and parameter determination method thereof |
| RU2675765C2 (en) * | 2014-08-19 | 2018-12-24 | Цзилинь Юниверсити | Electrified railway system without negative sequence throughout whole process and without power supply networks at intervals |
| CN104210385A (en) * | 2014-08-19 | 2014-12-17 | 吉林大学 | Electrified railway power grid system without negative sequence or spaced power supply networks in whole process |
| US10850637B2 (en) | 2014-08-19 | 2020-12-01 | Jilin University | Electrified railway power grid system without negative sequence in whole process and without power supply networks at intervals |
| WO2016026404A1 (en) * | 2014-08-19 | 2016-02-25 | 吉林大学 | Electrified railway power grid system without negative sequence in whole process and without power supply networks at intervals |
| CN105301986A (en) * | 2015-11-30 | 2016-02-03 | 中铁电气化勘测设计研究院有限公司 | Railway catenary spatial position simulation platform |
| CN105301986B (en) * | 2015-11-30 | 2018-01-26 | 天津中铁电气化设计研究院有限公司 | A kind of railway contact line locus simulation table |
| CN106938619A (en) * | 2017-04-01 | 2017-07-11 | 中铁第勘察设计院集团有限公司 | Cargo handling sidesway contact net system |
| CN106937091A (en) * | 2017-04-01 | 2017-07-07 | 中铁第勘察设计院集团有限公司 | The monitoring system of the flexible mobile catenary of horizontal rotation |
| CN106938619B (en) * | 2017-04-01 | 2023-03-21 | 中铁第一勘察设计院集团有限公司 | Lateral moving contact net system for cargo handling |
| CN107856578A (en) * | 2017-07-23 | 2018-03-30 | 浙江维思无线网络技术有限公司 | A kind of anchor field offset recognition methods and device |
| CN108909531B (en) * | 2018-08-02 | 2023-11-21 | 中铁高铁电气装备股份有限公司 | Integral type anti-location support hangs cantilever device |
| CN109649220A (en) * | 2018-12-21 | 2019-04-19 | 中国铁路设计集团有限公司 | A kind of Chinese Industrial Standards (CIS) contact net system |
| CN109733250A (en) * | 2019-01-31 | 2019-05-10 | 中国铁路设计集团有限公司 | A kind of contact net system based on composite wrist-arm |
| CN110145159A (en) * | 2019-06-25 | 2019-08-20 | 中铁八局集团电务工程有限公司 | A kind of hard crossbeam of the contact net of welded connecting and its construction method |
| CN110145159B (en) * | 2019-06-25 | 2024-02-27 | 中铁八局集团电务工程有限公司 | Welding connection contact net hard cross beam and construction method thereof |
| CN112721746B (en) * | 2021-02-02 | 2023-01-20 | 中铁二院工程集团有限责任公司 | Integral dropper device suitable for large-carrying-capacity electrified railway contact network system |
| CN112776677A (en) * | 2021-02-02 | 2021-05-11 | 西南交通大学 | Electrified railway contact net suspension structure suitable for big current-carrying capacity |
| CN112721746A (en) * | 2021-02-02 | 2021-04-30 | 中铁二院工程集团有限责任公司 | Integral dropper device suitable for large-carrying-capacity electrified railway contact network system |
| CN113511112A (en) * | 2021-06-16 | 2021-10-19 | 中铁建电气化局集团南方工程有限公司 | Construction structure and method for simultaneously connecting double-circuit contact networks |
| CN113804340A (en) * | 2021-09-10 | 2021-12-17 | 中国国家铁路集团有限公司 | Contact net compensation device state abnormity identification method and device |
| CN113804340B (en) * | 2021-09-10 | 2024-04-30 | 中国国家铁路集团有限公司 | Method and device for identifying abnormal state of contact net compensation device |
| CN114161998A (en) * | 2022-01-01 | 2022-03-11 | 孟庆伟 | Highway with power supply track |
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