CN103326301B - A kind of online anti-icing system of contact nets in electrified railways and anti-icing method thereof - Google Patents

A kind of online anti-icing system of contact nets in electrified railways and anti-icing method thereof Download PDF

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Publication number
CN103326301B
CN103326301B CN201310253080.7A CN201310253080A CN103326301B CN 103326301 B CN103326301 B CN 103326301B CN 201310253080 A CN201310253080 A CN 201310253080A CN 103326301 B CN103326301 B CN 103326301B
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China
Prior art keywords
icing
static reacance
reacance generator
control unit
contact
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CN201310253080.7A
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Chinese (zh)
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CN103326301A (en
Inventor
李群湛
易东
舒泽亮
郭蕾
解绍锋
贺建闽
郭锴
刘炜
李子晗
李亚楠
陈民武
周福林
张丽艳
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西南交通大学
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/10Flexible AC transmission systems [FACTS]

Abstract

The invention discloses the online anti-icing system of a kind of contact nets in electrified railways and anti-icing method thereof, the composition of its system is, traction substation of electric railway supply arm end installs static reacance generator, voltage transformer, contact wire temperature sensor and control unit; The control end of static reacance generator, the output of voltage transformer are connected with control unit with the output of contact wire temperature sensor; Telemechanical apparatus is also connected with control unit simultaneously.Static reacance generator in this system is at ordinary times for compensation of line voltage, anti-icing operating mode is entered when freezing, the net pressure utilizing voltage transformer to record and average net pressure ratio are comparatively, judge on supply arm with or without train and load condition thereof, and then control static reacance generator generation capacitive or perceptual anti-icing electric current, can not stop transport at contact line, under train normal operation, carry out online efficiently anti-icing, guarantee the safety of train operation.

Description

A kind of online anti-icing system of contact nets in electrified railways and anti-icing method thereof
Technical field
The present invention relates to the online anti-icing system of a kind of contact nets in electrified railways.
Background technology
Contact line is the important composition part of electric railway, and contact line icing has a strong impact on traffic safety.Icing not only will affect the static parameters such as contact line conducting wire height, also will affect the dynamic mechanics parameter of contact line simultaneously, change its mechanical property, make the trace performance deterioration of pantograph and contact line (bow net), frequent generation off-line, even cause and play bow, meanwhile, icing adds contact line hard spot, not only exacerbate bow net electric arc, more easily accelerate the abrasion of pantograph pan, time serious, even cause contact line power-off, affect train safe, well run.
Resistive silk heating clearing ice technology, chemical agent method, contact line heat is had to slide, manually remove icing etc. at the de-icing method of application to engineering practice at present.France's Alstom, HIT utilizes the feature development of the built-in insulation resistive silk contact wire resistive silk of contact line to add electrothermal deicing system, and be applied to Japan, France, Korea S, the railway of Britain, electric car system, compound wire in this system and high voltage transmission line deicing is similar, China's Harbin subway also uses resistive silk and adds electrothermal ice detachment, the method can reach the object of removing contact line icing in theory, but how it handles meteorological condition well, ice covering thickness and electric current and time etc. side and relation, also lack the experience of successful Application and corresponding code and specification.And for example chemical agent method is the method deicing of melting after utilizing chemical agent to contact with ice.Bremen, Germany tramcar company successfully uses overhead route deicing equipment to apply antifreezing agent to wire.At present, domestic on airport, highway has the way directly shedding snow-melting agent, but is coated in contact wire by snow-melting agent, also do not use case.Chemical agent causes the pollution of soil and environment after shedding in addition is also the problem needing to consider.Sliding, the artificial removing icing of contact line heat has easy advantage, but can affect the normal operation of train.
Along with the continuous expansion of China railways scale, railway, in national economic development and national defense construction, is responsible for more and more important effect, also more and more outstanding to the demand of contact line deicing.
Summary of the invention
The first object of the present invention is just to provide the online anti-icing system of a kind of contact nets in electrified railways, static reacance generator in this system is at ordinary times for compensation of line voltage, anti-icing operating mode is entered when freezing, do not increase too much investment, can not stop transport at contact line, under train normal operation, carry out online efficiently anti-icing, contact line is not frozen in the extreme disasters weather such as sleet and ice and snow situation, guarantees the safety of train operation.
The present invention realizes its first goal of the invention, the technical scheme adopted is: the online anti-icing system of a kind of contact nets in electrified railways, is characterized in that: the supply arm end of traction substation of electric railway arranges static reacance generator, voltage transformer, contact wire temperature sensor and control unit; The control end of static reacance generator, the output of voltage transformer are connected with control unit with the output of contact wire temperature sensor; Telemechanical apparatus is also connected with control unit simultaneously.
The second object of the present invention is just to provide a kind of online anti-icing system of above-mentioned contact nets in electrified railways that uses and carries out contact line method anti-icing online.
The present invention realizes its second goal of the invention, and the technical scheme adopted is, the online anti-icing system of a kind of above-mentioned contact nets in electrified railways carries out contact line method anti-icing online, the steps include:
A, when telemechanical apparatus do not send anti-icing order and contact wire temperature sensor export temperature value higher than freezing point time, control unit control described in static reacance generator work in compensation of line voltage operating mode, i.e. capacitive operating mode;
B, when telemechanical apparatus sends temperature value that anti-icing order or contact wire temperature sensor export less than or equal to freezing point, the static reacance generator described in control unit controls proceeds to anti-icing operating mode:
When described phase static reacance generator working clearance, when the net pressure that voltage transformer records is less than or equal to average net pressure, the static reacance generator described in control unit controls enters capacitive operating mode, absorbs the anti-icing operating current of capacitive;
When described phase static reacance generator working clearance, when the net pressure that voltage transformer records is greater than average net pressure, the static reacance generator described in control unit controls enters perceptual operating mode, absorbs perceptual anti-icing operating current.
Operation principle of the present invention is:
When telemechanical apparatus do not send anti-icing order and contact wire temperature sensor export temperature value higher than freezing point time, namely under normal circumstances, static reacance generator carries out reactive power compensation to contact line, work in compensation of line voltage operating mode, namely absorb the operating mode of capacitive reactive power to ensure that net is pressed in normal range (NR) as Compensation Objectives.
When the temperature value that contact wire temperature sensor exports may freeze according to weather forecast less than or equal to freezing point or dispatcher and send anti-icing order through telemechanical apparatus, static reacance generator enters anti-icing operating mode.Under anti-icing operating mode, further differentiation two kinds of operating modes: 1, when phase static reacance generator working clearance, when the net pressure that voltage transformer records is less than or equal to average net pressure, control unit judges that on supply arm, train load is heavier, static reacance generator enters capacitive operating mode, namely absorbs capacitive operating current, while having electric current to flow through contact line generation Joule heat, to also assures that on supply arm contact line that voltage is everywhere greater than train work required voltage all the time, ensure that the normal operation of train.2, when phase static reacance generator working clearance, when the net pressure that voltage transformer records is greater than average net pressure, control unit to judge on supply arm that train load is comparatively light or without charged train operation, static reacance generator enters perceptual operating mode, namely absorb perceptual operating current, this electric current flows through contact line generation Joule heat and carries out anti-icing.
The highest net pressure that average net pressure of the present invention is electric railway static reacance generator installation place and the minimum mean value of pressing of netting, its value is generally about 24kV.
Compared with prior art, the invention has the beneficial effects as follows:
One, the present invention is mainly used on compensation of line voltage basis at static reacance generator, increase anti-icing function, do not increase too much investment, can not stop transport at contact line, under train normal operation, carry out online efficiently anti-icing, contact line is not frozen in the extreme disasters weather such as sleet and ice and snow situation, guarantees the safety of train operation.
Two, in phase static reacance generator working clearance, the net pressure utilizing voltage transformer to record and average net pressure ratio are comparatively, train load condition on direct judgement supply arm, and and then control static reacance generator and produce the anti-icing electric current of corresponding properties, train load situation judging method on supply arm is simple, convenient, and reliable, without the need to the train conditions determining apparatus of other complexity.
Three, the invention process is convenient, both can be used for the transformation of old line and also can be used for new line construction.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1.
Embodiment
Embodiment 1
Fig. 1 illustrates, a kind of embodiment of the present invention is, the online anti-icing system of a kind of contact nets in electrified railways, its composition is: the supply arm end of traction substation of electric railway SS arranges static reacance generator SVG, voltage transformer YH, contact wire temperature sensor TC and control unit CU; The control end of static reacance generator SVG, the output of voltage transformer YH are connected with control unit CU with the output of contact wire temperature sensor TC; Telemechanical apparatus YD is also connected with control unit CU simultaneously.
Use the online anti-icing system of the contact nets in electrified railways of this example to carry out contact line method anti-icing online, the steps include:
A, when telemechanical apparatus YD do not send anti-icing order and the temperature value that exports of contact wire temperature sensor TC higher than freezing point time, control unit CU controls static reacance generator SVG and works in compensation of line voltage operating mode, i.e. capacitive operating mode;
B, when telemechanical apparatus YD sends temperature value that anti-icing order or contact wire temperature sensor TC export less than or equal to freezing point, control unit CU controls static reacance generator SVG and proceeds to anti-icing operating mode:
When static reacance generator SVG phase working clearance, when the net pressure that voltage transformer YH records is less than or equal to average net pressure, the static reacance generator SVG described in control unit CU controls enters capacitive operating mode, absorbs the anti-icing operating current of capacitive;
When static reacance generator SVG phase working clearance, when the net pressure that voltage transformer YH records is greater than average net pressure, the static reacance generator SVG described in control unit CU controls enters perceptual operating mode, absorbs perceptual anti-icing operating current.
Embodiment 2
When this example anti-icing electric current (capacity) that is severe for weather conditions or longer, a set of static reacance generator of supply arm can not meet anti-icing demand, traction substation SS supply arm installs the situation of two cover static reacance generators.Namely the static reacance generator SVG of traction substation SS supply arm end is because of the restriction by the minimum net pressure of its installation place supply arm end, and the anti-icing operating current of generation is less than the anti-icing required calculating current of contact line; Therefore, for reaching anti-icing requirement, this example is on the basis of embodiment 1, also increase a set of stage casing static reacance generator in the stage casing of supply arm, stage casing voltage transformer, stage casing contact wire temperature sensor and stage casing control unit, the control end of stage casing static reacance generator, the output of stage casing voltage transformer are connected with stage casing control unit with the output of stage casing contact wire temperature sensor; Stage casing control unit is also connected with telemechanical apparatus YD.The step that the stage casing static reacance generator of supply arm stage casing increase is anti-icing is online identical with the static reacance generator SVG of method and supply arm end, the static reacance generator SVG of stage casing static reacance generator and end works alone according to the contact line voltage of respective installation place, that is:
Supply arm end:
A, when telemechanical apparatus YD do not send anti-icing order and the temperature value that exports of contact wire temperature sensor TC higher than freezing point time, control unit CU controls static reacance generator SVG and works in compensation of line voltage operating mode, i.e. capacitive operating mode;
B, when telemechanical apparatus YD sends temperature value that anti-icing order or contact wire temperature sensor TC export less than or equal to freezing point, control unit CU controls static reacance generator SVG and proceeds to anti-icing operating mode:
When static reacance generator SVG phase working clearance, when the net pressure that voltage transformer YH records is less than or equal to average net pressure, the static reacance generator SVG described in control unit CU controls enters capacitive operating mode, absorbs the anti-icing operating current of capacitive;
When static reacance generator SVG phase working clearance, when the net pressure that voltage transformer YH records is greater than average net pressure, the static reacance generator SVG described in control unit CU controls enters perceptual operating mode, absorbs perceptual anti-icing operating current.
Supply arm stage casing:
A, when telemechanical apparatus YD do not send anti-icing order and the temperature value that exports of stage casing contact wire temperature sensor higher than freezing point time, stage casing control unit controls stage casing static reacance generator and works in compensation of line voltage operating mode, i.e. capacitive operating mode;
B, when telemechanical apparatus YD sends temperature value that anti-icing order or stage casing contact wire temperature sensor export less than or equal to freezing point, stage casing control unit controls stage casing static reacance generator and proceeds to anti-icing operating mode:
When stage casing static reacance generator phase working clearance, when the net pressure that stage casing voltage transformer records is less than or equal to average net pressure, stage casing control unit controls stage casing static reacance generator and enters capacitive operating mode, absorbs the anti-icing operating current of capacitive;
When stage casing static reacance generator phase working clearance, when the net pressure that stage casing voltage transformer records is greater than average net pressure, stage casing control unit controls stage casing static reacance generator and enters perceptual operating mode, absorbs perceptual anti-icing operating current.

Claims (1)

1. use the online anti-icing system of contact nets in electrified railways to carry out a contact line method anti-icing online, the composition of the online anti-icing system of described contact nets in electrified railways is: traction substation of electric railway (SS) supply arm end arranges static reacance generator (SVG), voltage transformer (YH), contact wire temperature sensor (TC) and control unit (CU); The control end of static reacance generator (SVG), the output of voltage transformer (YH) are connected with control unit (CU) with the output of contact wire temperature sensor (TC); Telemechanical apparatus (YD) is also connected with control unit (CU) simultaneously;
Use the online anti-icing system of described contact nets in electrified railways to carry out contact line method anti-icing online, the steps include:
A, when telemechanical apparatus (YD) do not send anti-icing order and the temperature value that exports of contact wire temperature sensor (TC) higher than freezing point time, static reacance generator described in control unit (CU) controls works in compensation of line voltage operating mode, i.e. capacitive operating mode;
B, when telemechanical apparatus (YD) sends temperature value that anti-icing order or contact wire temperature sensor (TC) export less than or equal to freezing point, the static reacance generator (SVG) described in control unit (CU) controls proceeds to anti-icing operating mode:
When described static reacance generator (SVG) phase working clearance, when the net pressure that voltage transformer (YH) records is less than or equal to average net pressure, static reacance generator (SVG) described in control unit (CU) controls enters capacitive operating mode, absorbs the anti-icing operating current of capacitive;
When described static reacance generator (SVG) phase working clearance, when the net pressure that voltage transformer (YH) records is greater than average net pressure, static reacance generator (SVG) described in control unit (CU) controls enters perceptual operating mode, absorbs perceptual anti-icing operating current.
CN201310253080.7A 2013-06-24 2013-06-24 A kind of online anti-icing system of contact nets in electrified railways and anti-icing method thereof CN103326301B (en)

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Effective date of registration: 20160616

Address after: 610031 Sichuan City, Chengdu Province, No. two North Ring Road, No. 111

Patentee after: Southwest Jiaotong University

Patentee after: Li Qunzhan

Address before: 610031 Sichuan City, Chengdu Province, No. two North Ring Road, No. 111

Patentee before: Southwest Jiaotong University