CN102328601A - Energy-feedback tractive power supply system with high power factor and high cost performance - Google Patents
Energy-feedback tractive power supply system with high power factor and high cost performance Download PDFInfo
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- CN102328601A CN102328601A CN201110268911A CN201110268911A CN102328601A CN 102328601 A CN102328601 A CN 102328601A CN 201110268911 A CN201110268911 A CN 201110268911A CN 201110268911 A CN201110268911 A CN 201110268911A CN 102328601 A CN102328601 A CN 102328601A
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The invention discloses an energy-feedback tractive power supply system with high power factor and high cost performance, relating to an energy-feedback tractive power supply system. The system comprises a main substation, a medium-voltage ring network, a first to an Nth energy-feedback tractive substations, a direct-current contact network and a steel rail. In the energy-feedback tractive substations, a set of 12-pulse-wave rectifier unit and a set of PWM (Pulse Width Modulation) unit are connected in parallel; by sufficiently utilizing respective advantages of the rectifier unit and the PWM unit, bidirectional flow of energy is realized on the one hand, braking energy of a train is fed back to an alternating-current grid, and electric energy is saved; on the other hand, the energy-feedback tractive power supply system integrates the advantages of simpleness and reliability, low cost and strong overload capability of a diode rectifier unit; beside, certain sensitive and capacitive reactive power is injected into the medium-voltage ring network by utilizing the PWM rectifier unit, and the power factor at the alternating-current incoming line of the main substation can be greatly increased. The whole tractive power supply system has higher cost performance.
Description
Technical field
The present invention relates to a kind ofly can present the formula tractive power supply system, refer in particular to be used to the urban rail transit vehicles power supply have a High Power Factor high performance-price ratio can present the formula tractive power supply system.
Background technology
The urban track traffic tractive power supply system mainly is made up of traction substation and direct current contact net system, and wherein traction substation is the core of whole tractive power supply system, is bearing alternating current is transformed to galvanic task.
Each traction substation source of AC is introduced mode and is mainly adopted centralized power supply system, and promptly each traction substation obtains electric energy through the unification of middle pressure ring net from Bulk Supply Substation.Because middle pressure ring net is laid along subway line; The parasitic capacitance of a large amount of medium voltage network cables produces, and the idle Bulk Supply Substation power factor that makes is lower in train off-peak period; Power factor only has about 0.4 when serious; Be significantly less than the power factor limit value of electric power enterprise regulation, press for the reactive-load compensation measure of taking.
In addition, each subway line traction substation electric supply installation all adopts the 24 pulse wave diode rectification units that are made up of two 12 pulse wave diode rectification units.Be characterized in that system architecture is simple, power density is high, equipment cost is lower, but vdc is uncontrollable, fluctuation range is big; Simultaneously, energy can only unidirectional transmission, and the excess energy of train regenerative brake can not the feedback AC network, needs consume with braking resistor, causes wasting of energy.Employing substitutes the diode rectification unit fully based on the formula traction power set of presenting of high-power PWM rectifier; Can guarantee that direct current network is stable; Improve quality of power supply, also can realize train braking energy feedback AC network simultaneously, avoid braking energy on resistance, to consume; Conserve energy; The existence of restraining factors such as but PWM rectifier price is higher, volume is big, overload capacity is relatively poor makes that the scheme cost performance of the alternative fully diode rectifier of employing PWM rectifier is relatively poor, is difficult in actual engineering, applied.
Summary of the invention
What the objective of the invention is to propose a kind of High Power Factor high performance-price ratio can present the formula tractive power supply system, and when realizing that the feedback of train braking energy utilizes again, the system of assurance has very high power factor and systemic price ratio.
To achieve these goals, the present invention realizes through following technical scheme:
A kind of High Power Factor high performance-price ratio can present the formula tractive power supply system, comprise that a main transformer station, middle pressure ring net, first to N can present formula traction substation, direct current contact system and rail.
Each can be presented the formula traction substation and is formed in parallel by cover 12 pulse wave rectifier units and a cover PWM rectifier unit; Each can be presented formula traction substation AC side and all be connected to the middle pressure ring net by the Bulk Supply Substation power supply; The DC side positive pole all is connected on the direct current contact system to train power supply, and the DC side negative pole all is connected on the rail.
The said quantity N that can present the formula traction substation is determined that by length of line common 2 kilometers～3 kilometers subway line is provided with one can present formula substation.
Said each capacity that can present in the formula traction substation cover 12 pulse wave rectifier units and a cover PWM rectifier unit is equipped with according to circuit traction calculation result, and the insufficient section of PWM rectifier unit overload capacity remedies through increasing 12 pulse wave rectifier unit capacities.
Said first to N the 12 pulse wave rectifier device that can present in two adjacent in the formula traction substation passes through voltage transformer phase shift ± 7.5 ° one 24 pulse wave rectifier device of formation.
Said each can present one in formula traction substation cover PWM rectifier unit and comprise two transformer with split windings and two PWM rectifiers; Two transformer with split windings have a former limit winding and two secondary windings; Former limit winding is received middle pressure ring net; Each secondary winding connects a PWM rectifier, receives on the direct current contact system after the anodal output-parallel of each PWM rectifier, receives rail after the negative pole output-parallel of each PWM rectifier.
Each PWM rectifier adopts phase shift SVPWM modulation in the said PWM rectifier unit, makes that whole unit equivalent switching frequency is M a times of single PWM rectifier switch frequency, and M is a PWM rectifier quantity.
Two each secondary winding connection of transformer with split winding are identical in the said PWM rectifier unit, and the impedance of secondary short circuit in winding is used for substituting PWM rectifier AC side inductance.
The beneficial effect that the present invention is compared with prior art had:
1) the formula traction substation be can present and a PWM rectifier unit and one the 12 parallelly connected main circuit structure of pulse wave rectifier unit adopted; Made full use of the two advantage separately; Realized on the one hand the two-way flow of energy, can be with the train braking energy back stream electrical network of backcrossing, saves energy; Utilize the advantage that diode rectifier is simple and reliable, cheap, overload capacity is strong on the other hand, made total system have high cost performance.
2) the PWM rectifier unit can also be used for injecting certain perception and capacitive reactive power to the pressure ring net except can operating in rectification, inversion operating mode, improves Bulk Supply Substation point of incoming cables power factor; With in the electric power system adjacent two can present 12 of formula traction substation
3) the pulse wave rectifier unit passes through voltage transformer phase shift ± 7.5 ° one 24 pulse wave rectifier device of formation, thereby reduces the current harmonics that Bulk Supply Substation exchanges the point of incoming cables to a certain extent;
Below in conjunction with accompanying drawing and embodiment the present invention is done further explanation.
Description of drawings
Fig. 1 be a kind of High Power Factor high performance-price ratio can present formula tractive power supply system main circuit topology;
Fig. 2 can present the formula traction substation to form scheme drawing;
Fig. 3 is 12 pulse wave rectifier unit power circuits of voltage transformer phase shift+7.5 °;
Fig. 4 is 12 pulse wave rectifier unit power circuits of voltage transformer phase shift-7.5 °;
Fig. 5 is a PWM rectifier unit power circuit.
The specific embodiment
With 20 kilometers of subway line length, containing 8 tractive power supply systems that can present formula substation is that example describes below.
Whole tractive power supply system adopts main circuit topology as shown in Figure 1.Wherein:
Major equipment in the Bulk Supply Substation is a high capacity oil-filled transformer, and effect is a pressure ring net 35kV voltage during input 110kV high pressure is converted into, and each can present the use of formula traction substation on the supply lines.This transformer capacity is 60MVA.
Middle pressure ring net adopts the 35kV power cable with cross-linked polyethylene insulation, lays along subway line, is used for presenting the conveying of formula traction substation and distributing electric energy from Bulk Supply Substation to each.Along with the employing that can present the formula traction substation, unnecessary train braking energy also can feed back to middle pressure ring net, is utilized by other substations again, and then realizes energy-conservation.
Can present the core that the formula traction substation is whole electric power system; Realize that alternating current arrives galvanic bi-directional conversion on the one hand; That is: converting interchange into direct current (DC) during train traction is that train provides energy; During train braking, convert direct current energy into AC energy and feed back to middle pressure ring net, supply other substation to utilize; On the other hand,, inject certain perception or capacitive reactive power, improve the system power factor to middle pressure ring net according to Bulk Supply Substation point of incoming cables power factor situation.
Can present and adopt cover 12 pulse wave rectifier units and a cover PWM rectifier unit parallel connection in the formula traction substation, as shown in Figure 2.The capacity of 12 pulse wave rectifier units and PWM rectifier unit is equipped with circuit traction calculation result, and considers and improve systemic price ratio, and the deficiency of PWM rectifier unit overload capacity goes to remedy through the method for suitable increase 12 pulse wave rectifier unit capacities.Suppose that the rated capacity of 12 pulse wave rectifier units and PWM rectifier unit is 2MW in the present embodiment, and can both meet requirements.
12 pulse wave rectifier units are made up of a phase shifting transformer and a rectifier cubicle.Reduce current harmonics in order to constitute 24 pulse wave rectifiers, require the former limit of phase shifting transformer of two 12 pulse wave rectifier units all to adopt extend-triangle to connect, make voltage transformer phase shift+7.5 ° with-7.5 °, like Fig. 3, shown in 4.Can present the formula traction substation for 8 in the present embodiment, require the 1st, 3; 5,7 substations adopt 12 pulse wave rectifier units of voltage transformer phase shift+7.5 °, the 2nd; 4,6,8 substations adopt 12 pulse wave rectifier units of voltage transformer phase shift-7.5 °; Feasiblely can present formula traction substation 1 and can present formula traction substation 2; Can present formula traction substation 3 and can present formula traction substation 4, can present formula traction substation 5 and can present formula traction substation 6, can present formula traction substation 7 and can present formula traction substation 8 and constitute 24 pulse wave rectifiers respectively.
The PWM rectifier unit is made up of two transformer with split windings and two PWM rectifiers, and is as shown in Figure 5.Two transformer with split windings have a former limit winding and two secondary windings, and each secondary winding is connected respectively to a PWM rectifier ac input end, and the dc output end of two PWM rectifiers is parallel connection directly.
Two transformer with split windings adopt the poured with epoxy resin dry type transformer, have a former limit winding, two secondary windings, and the voltage transformer connection mode is Yd11, d11, no-load voltage ratio is 35kV/450V/450V, capacity is 2MVA.Voltage transformer secondary winding equivalent short circuit impedance is designed to 30%, and purpose is in order to the alternative required AC inductance of PWM rectifier work, thus simplied system structure.
The PWM rectifier DC supports electric capacity and adopts metallic film electric capacity, and parasitic inductance is little, and the ripple current carrying capacity is strong, and the life-span is long, thereby reduces the DC supply voltage ripple, improves power supply quality, and reduces equipment maintenance cost.
The PWM rectifier adopts representative type two level PWM rectifier main circuit topologies; Power device adopts IGBT; Switching frequency is 1kHZ, adopts phase shift SVPWM modulation technique, makes that the equivalent switching frequency of this PWM rectifier unit is 2kHZ; Become 2 times of single PWM rectifier switch frequency, thereby reduce the total current harmonic wave that the whole PWM rectifier unit is injected the pressure ring net greatly.
The direct current contact system with can present formula traction substation direct current output cathode and link to each other, adopt overhead contact line, be used for subway train is given.
Rail with can present formula traction substation direct current output negative pole and link to each other, be used to realize rail return current.The rail of whole piece circuit adopts to suspend and installs, and reduces the electrolytic corrosion to underground utilities.
Claims (7)
- A High Power Factor high performance-price ratio can present the formula tractive power supply system, it is characterized in that:Comprise a main transformer station (1), a middle pressure ring net (2), first to N can present the formula traction substation (3-1,3-2 ..., 3-N), a direct current contact system (4) and rail (5);Each can be presented the formula traction substation and is formed in parallel by cover 12 pulse wave rectifier units and a cover PWM rectifier unit; Each can be presented formula traction substation AC side and all be connected to the middle pressure ring net (2) by the Bulk Supply Substation power supply; The DC side positive pole all is connected to on the direct current contact system of train power supply (4), and the DC side negative pole all is connected to (5) on the rail.
- 2. a kind of High Power Factor high performance-price ratio as claimed in claim 1 can present the formula tractive power supply system, it is characterized in that:The said quantity N that can present the formula traction substation is determined that by length of line common 2 kilometers～3 kilometers subway line is provided with one can present formula substation.
- 3. a kind of High Power Factor high performance-price ratio as claimed in claim 1 can present the formula tractive power supply system, it is characterized in that:Said each capacity that can present in the formula traction substation cover 12 pulse wave rectifier units and a cover PWM rectifier unit is equipped with according to circuit traction calculation result, and the insufficient section of PWM rectifier unit overload capacity remedies through increasing 12 pulse wave rectifier unit capacities.
- 4. a kind of High Power Factor high performance-price ratio as claimed in claim 1 can present the formula tractive power supply system, it is characterized in that:Said first to N can present the formula traction substation (3-1,3-2 ..., 3-N) in 12 pulse wave rectifier devices in adjacent two ° constitute one 24 pulse wave rectifier device through voltage transformer phase shift ± 7.5.
- 5. a kind of High Power Factor high performance-price ratio as claimed in claim 1 can present the formula tractive power supply system, it is characterized in that:Said each can present one in formula traction substation cover PWM rectifier unit and comprise two transformer with split windings and two PWM rectifiers; Two transformer with split windings have a former limit winding and two secondary windings; Former limit winding is received middle pressure ring net (2); Each secondary winding connects a PWM rectifier, receives on the direct current contact system after the anodal output-parallel of each PWM rectifier, receives rail after the negative pole output-parallel of each PWM rectifier.
- 6. a kind of High Power Factor high performance-price ratio as claimed in claim 1 can present the formula tractive power supply system, it is characterized in that:Each PWM rectifier adopts phase shift SVPWM modulation in the said PWM rectifier unit, makes that whole unit equivalent switching frequency is M a times of single PWM rectifier switch frequency, and M is a PWM rectifier quantity.
- 7. a kind of High Power Factor high performance-price ratio as claimed in claim 1 can present the formula tractive power supply system, it is characterized in that:Two each secondary winding connection of transformer with split winding are identical in the said PWM rectifier unit, and the impedance of secondary short circuit in winding is used for substituting PWM rectifier AC side inductance.
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684514A (en) * | 2012-03-13 | 2012-09-19 | 北京千驷驭电气有限公司 | Energy feedback type traction power supply device |
| CN102969734A (en) * | 2012-11-12 | 2013-03-13 | 国家电网公司 | Power supply device for urban light rail |
| CN103023343A (en) * | 2012-12-13 | 2013-04-03 | 江苏华鹏变压器有限公司 | Three-phase 24-pulse traction rectifier transformer |
| CN103241138A (en) * | 2013-04-24 | 2013-08-14 | 西南交通大学 | Low-frequency traction power supply system |
| CN103311910A (en) * | 2013-05-29 | 2013-09-18 | 西南交通大学 | Direct current traction power supply system and protective method |
| CN103407383A (en) * | 2013-07-29 | 2013-11-27 | 华北电力大学（保定） | Bidirectional interactive type DC (direct-current) traction power supply system base on new energy |
| CN104836252A (en) * | 2015-05-05 | 2015-08-12 | 中铁电气化勘测设计研究院有限公司 | Urban rail transit medium-voltage inverter type renewable energy utilization device |
| CN108964078A (en) * | 2018-08-02 | 2018-12-07 | 北京千驷驭电气有限公司 | Urban track traffic distributing reactive-load compensation method and system |
| CN109698496A (en) * | 2017-10-20 | 2019-04-30 | 株洲中车时代电气股份有限公司 | A kind of rail traffic tractive power supply system and control method |
| CN109733253A (en) * | 2019-03-25 | 2019-05-10 | 盾石磁能科技有限责任公司 | Utilize the system and method that can present inverter and solve the problems, such as rail potential |
| CN110071648A (en) * | 2019-04-29 | 2019-07-30 | 西南交通大学 | The progress control method of PWM rectifier in a kind of city rail traffic tractive power supply system |
| CN110077237A (en) * | 2019-04-17 | 2019-08-02 | 南京南瑞继保电气有限公司 | It is a kind of to present Setup Controller, rail traffic tractive power supply system and control method |
| WO2020024505A1 (en) * | 2018-08-02 | 2020-02-06 | 北京千驷驭电气有限公司 | Decentralized reactive power compensation method and system for urban rail transit |
| CN111478616A (en) * | 2019-01-04 | 2020-07-31 | 西安许继电力电子技术有限公司 | Subway traction power supply system and bidirectional converter device |
| CN112737367A (en) * | 2020-12-09 | 2021-04-30 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Rectifying power supply device |
| CN113595056A (en) * | 2021-08-10 | 2021-11-02 | 思源清能电气电子有限公司 | Multi-winding transformer power supply system with balanced impedance |
| CN113859057A (en) * | 2021-09-23 | 2021-12-31 | 中铁第四勘察设计院集团有限公司 | High-speed magnetic levitation power supply system |
| CN114221333A (en) * | 2021-12-10 | 2022-03-22 | 江苏晨大电气股份有限公司 | Intelligent network voltage control method, device and system for rail transit bidirectional converter |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684514A (en) * | 2012-03-13 | 2012-09-19 | 北京千驷驭电气有限公司 | Energy feedback type traction power supply device |
| CN102969734A (en) * | 2012-11-12 | 2013-03-13 | 国家电网公司 | Power supply device for urban light rail |
| CN103023343A (en) * | 2012-12-13 | 2013-04-03 | 江苏华鹏变压器有限公司 | Three-phase 24-pulse traction rectifier transformer |
| CN103241138A (en) * | 2013-04-24 | 2013-08-14 | 西南交通大学 | Low-frequency traction power supply system |
| CN103241138B (en) * | 2013-04-24 | 2015-07-08 | 西南交通大学 | Low-frequency traction power supply system |
| CN103311910A (en) * | 2013-05-29 | 2013-09-18 | 西南交通大学 | Direct current traction power supply system and protective method |
| CN103311910B (en) * | 2013-05-29 | 2015-08-19 | 西南交通大学 | A kind of DC traction power-supply system and guard method |
| CN103407383A (en) * | 2013-07-29 | 2013-11-27 | 华北电力大学（保定） | Bidirectional interactive type DC (direct-current) traction power supply system base on new energy |
| CN104836252A (en) * | 2015-05-05 | 2015-08-12 | 中铁电气化勘测设计研究院有限公司 | Urban rail transit medium-voltage inverter type renewable energy utilization device |
| CN109698496A (en) * | 2017-10-20 | 2019-04-30 | 株洲中车时代电气股份有限公司 | A kind of rail traffic tractive power supply system and control method |
| CN108964078A (en) * | 2018-08-02 | 2018-12-07 | 北京千驷驭电气有限公司 | Urban track traffic distributing reactive-load compensation method and system |
| WO2020024505A1 (en) * | 2018-08-02 | 2020-02-06 | 北京千驷驭电气有限公司 | Decentralized reactive power compensation method and system for urban rail transit |
| CN111478616A (en) * | 2019-01-04 | 2020-07-31 | 西安许继电力电子技术有限公司 | Subway traction power supply system and bidirectional converter device |
| CN109733253A (en) * | 2019-03-25 | 2019-05-10 | 盾石磁能科技有限责任公司 | Utilize the system and method that can present inverter and solve the problems, such as rail potential |
| CN110077237A (en) * | 2019-04-17 | 2019-08-02 | 南京南瑞继保电气有限公司 | It is a kind of to present Setup Controller, rail traffic tractive power supply system and control method |
| CN110071648A (en) * | 2019-04-29 | 2019-07-30 | 西南交通大学 | The progress control method of PWM rectifier in a kind of city rail traffic tractive power supply system |
| CN112737367A (en) * | 2020-12-09 | 2021-04-30 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Rectifying power supply device |
| CN113595056A (en) * | 2021-08-10 | 2021-11-02 | 思源清能电气电子有限公司 | Multi-winding transformer power supply system with balanced impedance |
| CN113859057A (en) * | 2021-09-23 | 2021-12-31 | 中铁第四勘察设计院集团有限公司 | High-speed magnetic levitation power supply system |
| CN113859057B (en) * | 2021-09-23 | 2023-03-24 | 中铁第四勘察设计院集团有限公司 | High-speed magnetic levitation power supply system |
| CN114221333A (en) * | 2021-12-10 | 2022-03-22 | 江苏晨大电气股份有限公司 | Intelligent network voltage control method, device and system for rail transit bidirectional converter |
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Application publication date: 20120125 |