CN103326301A - System and method for electrified railway overhead line online ice resistance - Google Patents
System and method for electrified railway overhead line online ice resistance Download PDFInfo
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- CN103326301A CN103326301A CN2013102530807A CN201310253080A CN103326301A CN 103326301 A CN103326301 A CN 103326301A CN 2013102530807 A CN2013102530807 A CN 2013102530807A CN 201310253080 A CN201310253080 A CN 201310253080A CN 103326301 A CN103326301 A CN 103326301A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E40/10—Flexible AC transmission systems [FACTS]
Abstract
The invention discloses a system and method for electrified railway overhead line online ice resistance. According to the system, a static var generator, a voltage transformer, an overhead line temperature sensor and a control unit are arranged at the tail end of an electrified railway traction substation power supply arm. A control end of the static var generator, an output end of the voltage transformer and an output end of the overhead line temperature sensor are connected with the control unit. Meanwhile, a telecontrol device is connected with the control unit as well. The static var generator in the system is usually used for network voltage compensation and is in an ice resistant work condition when the system is possibly frozen, a network voltage measured by the voltage transformer is compared with an average network voltage, whether a train is on the power supply arm or not and the loading condition of the power supply arm are judged, and therefore the static var generator is controlled to generate capacitive or sensitive ice resistant currents. Online efficient ice resistance can be conducted under the conditions that the operation of overhead lines is not stopped and the train operates normally and the safety of the operation of the train is guaranteed.
Description
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 the 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 simultaneously the dynamic mechanics parameter of contact line, change its mechanical property, so that the trace performance of pantograph and contact line (bow net) is deteriorated, the frequent occurrence off-line, even cause to connect and make bow, simultaneously, icing has increased the contact line hard spot, not only aggravated bow net electric arc, more easily accelerate the abrasion of pantograph pan, when serious even cause the contact line outage, affect train safe, well move.
De-icing method at application to engineering practice has resistive silk heating deicing technology, chemical agent method, contact line heat to slide, manually remove icing etc. at present.France's Alstom, HIT utilize the resistive silk of built-in insulation contact wire feature development the resistive silk heating of contact line deicing system, and be applied to Japan, France, Korea S, the railway of Britain, electric car system, compound wire in this system and the high voltage transmission line deicing is similar, China's Harbin subway has also adopted resistive silk heating de-icing method, the method can reach the purpose of removing the contact line icing in theory, but how it handles meteorological condition well, ice covering thickness and electric current and time etc. the side and relation, also lack experience and corresponding rules and the standard of successful Application.And for example the chemical agent method is the method deicing of melting after utilizing chemical agent and ice contacting.Bremen, Germany tramcar company successfully uses the overhead route deicing equipment to apply antifreezing agent to wire.At present, domestic on the airport, highway has the way of directly shedding snow-melting agent, but snow-melting agent is coated in the contact wire, also do not use case.Causing the pollution to soil and environment after chemical agent is shed in addition also is a problem that needs consideration.Contact line heat is sliding, manually remove icing easy advantage, but can affect the normal operation of train.
Along with the continuous expansion of China railways scale, railway is being undertaken more and more important effect in national economic development and national defense construction, and is also more and more outstanding to the demand of contact line deicing.
Summary of the invention
The first purpose of the present invention just provides the online anti-icing system of a kind of contact nets in electrified railways, static reacance generator in this system is used for compensation of line voltage at ordinary times, in the time may freezing, enter anti-icing operating mode, do not increase too much investment, can not stop transport at contact line, under the train normal operation, carry out efficiently anti-icingly online, contact line is not frozen in the extreme hazard weather situation such as sleet and ice and snow, guarantee the safety of train operation.
The present invention realizes its first goal of the invention, the technical scheme that adopts 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 output of the control end of static reacance generator, the output of voltage transformer and contact wire temperature sensor is connected with control unit; Telemechanical apparatus also is connected with control unit simultaneously.
The second purpose of the present invention just provides a kind of online anti-icing system of above-mentioned contact nets in electrified railways of using and carries out the online anti-icing method of contact line.
The present invention realizes its second goal of the invention, and the technical scheme that adopts is that a kind of above-mentioned online anti-icing system of contact nets in electrified railways is carried out the online anti-icing method of contact line, the steps include:
A, when the temperature value that does not send the output of anti-icing order and contact wire temperature sensor when telemechanical apparatus is higher than freezing point, control unit is controlled described static reacance generator and is worked in the compensation of line voltage operating mode, i.e. the capacitive operating mode;
B, when the temperature value that sends the output of anti-icing order or contact wire temperature sensor when telemechanical apparatus is less than or equal to freezing point, control unit is controlled described static reacance generator and is changed anti-icing operating mode over to:
When the phase described static reacance generator working clearance, when the net that voltage transformer records was pressed less than or equal to average net pressure, control unit was controlled described static reacance generator and is entered the capacitive operating mode, absorbs the anti-icing operating current of capacitive;
When the phase described static reacance generator working clearance, when the net that voltage transformer records was pressed greater than average net pressure, control unit was controlled described static reacance generator and is entered perceptual operating mode, absorbs perceptual anti-icing operating current.
Operation principle of the present invention is:
When the temperature value that does not send the output of anti-icing order and contact wire temperature sensor when telemechanical apparatus is higher than freezing point, namely under normal circumstances, static reacance generator carries out reactive power compensation to contact line, work in the compensation of line voltage operating mode, the operating mode that namely absorbs capacitive reactive power is pressed in the normal range (NR) as Compensation Objectives to guarantee net.
When the temperature value of contact wire temperature sensor output is less than or equal to that freezing point or dispatcher may be frozen according to weather forecast and when telemechanical apparatus sent anti-icing order, static reacance generator entered anti-icing operating mode.Under anti-icing operating mode, further distinguish two kinds of operating modes: 1, when phase static reacance generator working clearance, when the net that voltage transformer records is pressed less than or equal to average net pressure, control unit judges that train load is heavier on the supply arm, static reacance generator enters the capacitive operating mode, namely absorbs the capacitive operating current, is having electric current to flow through when contact line produces Joule heat, guaranteed also on the supply arm contact line that everywhere voltage all the time greater than train work required voltage, has guaranteed the normal operation of train.2, when phase static reacance generator working clearance, when the net that voltage transformer records is pressed greater than average net pressure, control unit judges on the supply arm that train load is light or without charged train operation, static reacance generator enters perceptual operating mode, namely absorb perceptual operating current, this electric current contact line of flowing through produces Joule heat and carries out anti-icing.
Average net of the present invention is pressed as the highest net of electric railway static reacance generator installation place and is pressed the mean value of pressing with minimum net, and 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 the 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 the train normal operation, carry out efficiently anti-icing online, contact line is not frozen in the extreme hazard weather situation such as sleet and ice and snow, guarantee the safety of train operation.
Two, in phase static reacance generator working clearance, utilize net that voltage transformer records press with average net pressure ratio, directly judge train load condition on the supply arm, and and then the control static reacance generator produce the anti-icing electric current of corresponding properties, train load situation judging method on the supply arm is simple, convenient, and reliable, need not other complicated train conditions determining apparatus.
Three, the invention process is convenient, both can be used for old line transformation and also can be used for the ew line construction.
The invention will be further described below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the 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 output of the output of the control end of static reacance generator SVG, voltage transformer YH and contact wire temperature sensor TC is connected with control unit CU; Telemechanical apparatus YD also is connected with control unit CU simultaneously.
Use the online anti-icing system of these routine contact nets in electrified railways to carry out the online anti-icing method of contact line, the steps include:
A, when the temperature value that does not send anti-icing order and contact wire temperature sensor TC output as telemechanical apparatus YD is higher than freezing point, control unit CU control static reacance generator SVG works in the compensation of line voltage operating mode, i.e. the capacitive operating mode;
B, when the temperature value that sends anti-icing order or contact wire temperature sensor TC output as telemechanical apparatus YD is less than or equal to freezing point, control unit CU control static reacance generator SVG changes anti-icing operating mode over to:
When static reacance generator SVG phase working clearance, when the net that voltage transformer YH records was pressed less than or equal to average net pressure, control unit CU controlled described static reacance generator SVG and enters the capacitive operating mode, absorbs the anti-icing operating current of capacitive;
When static reacance generator SVG phase working clearance, when the net that voltage transformer YH records was pressed greater than average net pressure, control unit CU controlled described static reacance generator SVG and enters perceptual operating mode, absorbs perceptual anti-icing operating current.
Embodiment 2
This example for weather conditions abominable or supply arm is long, when anti-icing electric current (capacity) cover static reacance generator can not satisfy anti-icing demand, traction substation SS supply arm is installed the situations of two cover static reacance generators.Be the restriction of static reacance generator SVG because pressed by the terminal minimum net of its installation place supply arm of traction substation SS supply arm end, the anti-icing operating current of generation is less than the anti-icing required calculating electric current of contact line; Therefore, for reaching anti-icing requirement, this example is on the basis of embodiment 1, also increase by a cover 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 output of the output of the control end of stage casing static reacance generator, stage casing voltage transformer and stage casing contact wire temperature sensor is connected with the stage casing control unit; The stage casing control unit also is connected with telemechanical apparatus YD.The online anti-icing step of the stage casing static reacance generator that the supply arm stage casing increases is identical with the static reacance generator SVG of method and supply arm end, the static reacance generator SVG basis of stage casing static reacance generator and the end separately contact line voltage of installation place works alone, that is:
Supply arm is terminal:
A, when the temperature value that does not send anti-icing order and contact wire temperature sensor TC output as telemechanical apparatus YD is higher than freezing point, control unit CU control static reacance generator SVG works in the compensation of line voltage operating mode, i.e. the capacitive operating mode;
B, when the temperature value that sends anti-icing order or contact wire temperature sensor TC output as telemechanical apparatus YD is less than or equal to freezing point, control unit CU control static reacance generator SVG changes anti-icing operating mode over to:
When static reacance generator SVG phase working clearance, when the net that voltage transformer YH records was pressed less than or equal to average net pressure, control unit CU controlled described static reacance generator SVG and enters the capacitive operating mode, absorbs the anti-icing operating current of capacitive;
When static reacance generator SVG phase working clearance, when the net that voltage transformer YH records was pressed greater than average net pressure, control unit CU controlled described static reacance generator SVG and enters perceptual operating mode, absorbs perceptual anti-icing operating current.
The supply arm stage casing:
A, when the temperature value that does not send the output of anti-icing order and stage casing contact wire temperature sensor as telemechanical apparatus YD is higher than freezing point, stage casing control unit control stage casing static reacance generator works in the compensation of line voltage operating mode, i.e. the capacitive operating mode;
B, when the temperature value that sends the output of anti-icing order or stage casing contact wire temperature sensor as telemechanical apparatus YD is less than or equal to freezing point, stage casing control unit control stage casing static reacance generator changes anti-icing operating mode over to:
When stage casing static reacance generator phase working clearance, when the net that the stage casing voltage transformer records was pressed less than or equal to average net pressure, stage casing control unit control stage casing static reacance generator entered the capacitive operating mode, absorbs the anti-icing operating current of capacitive;
When stage casing static reacance generator phase working clearance, when the net that the stage casing voltage transformer records was pressed greater than average net pressure, stage casing control unit control stage casing static reacance generator entered perceptual operating mode, absorbs perceptual anti-icing operating current.
Claims (2)
1. online anti-icing system of contact nets in electrified railways, it is characterized in that: 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 output of the output of the control end of static reacance generator (SVG), voltage transformer (YH) and contact wire temperature sensor (TC) is connected with control unit (CU); Telemechanical apparatus (YD) also is connected with control unit (CU) simultaneously.
2. a right to use requires the online anti-icing system of 1 described contact nets in electrified railways to carry out the online anti-icing method of contact line, the steps include:
A, when the temperature value that does not send the output of anti-icing order and contact wire temperature sensor (TC) when telemechanical apparatus (YD) is higher than freezing point, the described static reacance generator of control unit (CU) control works in the compensation of line voltage operating mode, i.e. the capacitive operating mode;
B, when the temperature value that sends the output of anti-icing order or contact wire temperature sensor (TC) when telemechanical apparatus (YD) is less than or equal to freezing point, control unit (CU) is controlled described static reacance generator (SVG) and is changed anti-icing operating mode over to:
When described static reacance generator (SVG) phase working clearance, when the net that voltage transformer (YH) records is pressed less than or equal to average net pressure, control unit (CU) is controlled described static reacance generator (SVG) and is entered the capacitive operating mode, absorbs the anti-icing operating current of capacitive;
When described static reacance generator (SVG) phase working clearance, when the net that voltage transformer (YH) records is pressed greater than average net pressure, control unit (CU) is controlled described static reacance generator (SVG) and is entered perceptual operating mode, absorbs perceptual anti-icing operating current.
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| CN201310253080.7A CN103326301B (en) | 2013-06-24 | 2013-06-24 | A kind of online anti-icing system of contact nets in electrified railways and anti-icing method thereof |
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| CN201310253080.7A CN103326301B (en) | 2013-06-24 | 2013-06-24 | A kind of online anti-icing system of contact nets in electrified railways and anti-icing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105870926A (en) * | 2016-05-05 | 2016-08-17 | 江苏同芯电气科技有限公司 | Novel alternating-current and direct-current hybrid tractive power supply system |
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| CN202084892U (en) * | 2011-05-29 | 2011-12-21 | 西南交通大学 | Power frequency online anti-icing and de-icing device of contact net in electrified railway |
| CN102431468A (en) * | 2011-10-25 | 2012-05-02 | 成都交大许继电气有限责任公司 | Icing preventing and ice melting method for high speed railway and system for realizing method |
| CN203331869U (en) * | 2013-06-24 | 2013-12-11 | 西南交通大学 | Electrified railway contact system on-line ice-proof system |
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- 2013-06-24 CN CN201310253080.7A patent/CN103326301B/en active Active
Patent Citations (5)
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| JP2001268805A (en) * | 2000-03-22 | 2001-09-28 | Ngk Insulators Ltd | Power factor constant control method of reactive power compensation device |
| CN102195260A (en) * | 2011-05-29 | 2011-09-21 | 西南交通大学 | Power-frequency online anti-icing de-icing method for electrified railway contact network |
| CN202084892U (en) * | 2011-05-29 | 2011-12-21 | 西南交通大学 | Power frequency online anti-icing and de-icing device of contact net in electrified railway |
| CN102431468A (en) * | 2011-10-25 | 2012-05-02 | 成都交大许继电气有限责任公司 | Icing preventing and ice melting method for high speed railway and system for realizing method |
| CN203331869U (en) * | 2013-06-24 | 2013-12-11 | 西南交通大学 | Electrified railway contact system on-line ice-proof system |
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| CN105870926A (en) * | 2016-05-05 | 2016-08-17 | 江苏同芯电气科技有限公司 | Novel alternating-current and direct-current hybrid tractive power supply system |
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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 |