CN203352171U - Three-phase combined cophase supply and transformation structure - Google Patents
Three-phase combined cophase supply and transformation structure Download PDFInfo
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- CN203352171U CN203352171U CN 201320436912 CN201320436912U CN203352171U CN 203352171 U CN203352171 U CN 203352171U CN 201320436912 CN201320436912 CN 201320436912 CN 201320436912 U CN201320436912 U CN 201320436912U CN 203352171 U CN203352171 U CN 203352171U
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Abstract
The utility model discloses a three-phase combined cophase supply and transformation structure. A traction transformer with a single-phase structure and a cophase power supply apparatus are employed; The cophase power supply apparatus comprises high voltage matching transformers, an AC/DC/AC converter and a traction matching transformer; and the primary windings of the two high voltage matching transformers and the primary winding of the traction transformer form a triangle link group. The secondary windings of the high voltage matching transformers are connected to the input terminal of the AC/DC/AC converter, and the output terminal of the AC/DC/AC converter is connected with the primary winding of the traction matching transformer. The voltage magnitude and phase of the secondary winding of the traction transformer is respectively consistent with the voltage magnitude and phase of the secondary winding of the traction matching transformer, and the two windings are both connected with a traction bus. According to the three-phase combined cophase supply and transformation structure, traction power supply resource configuration is optimized, construction investment is reduced, and the energy saving effect is obvious. Cophase power supply reconstruction for a Vv wiring or Vx wiring traction transformer station is convenient, in addition, the traction transformer can be replaced by a new cophase power supply apparatus in future to achieve through cophase power supply.
Description
Technical field
The utility model relates to attached wires of AC electrified railway for electrical domain, relates in particular to a kind of three phase combined cophase supply power transformation structure.
Background technology
Electric railway generally adopts the single phase industrial frequency AC system by the municipal power supply system power supply, and for making the balance distribution as far as possible in three-phase electrical power system of single-phase traction load, electric railway often adopts the scheme of rotation phase sequence, phase-splitting switched-mode power supply.Cut apart with neutral section insulator between the adjacent service area at phase-splitting subregion place, form electric phase-splitting, also claim phase-splitting.For preventing that the charged phase-splitting excessively of electric locomotive from occurring to burn out the overhead contact line parts because of arcing, even cause the accidents such as phase fault, continuous rising along with train speed, can't manually be moved back level the driver, close auxiliary unit, disconnected main circuit breaker, cross neutral section by train inertia, co-host break road device again, close auxiliary unit, advance in the situation that the level restoration traction power completed phase-splitting, adopted the automatic passing over of neutral section technology, mainly contain the phase-splitting of automatically switching of ground switch, on vehicle-mounted automatic passing over of neutral section and post, automatic passing over of neutral section etc. is several, but still exist train in switching over to cross the electric process of transient state of phase-splitting, easily produce larger switching overvoltage or overcurrent, cause the accidents such as traction net and mobile unit scaling loss, even cause the automatic passing over of neutral section operation failure, affect power supply reliability and safe train operation.Therefore, the phase-splitting link is the weakest link in whole tractive power supply system, and train becomes the bottleneck of high-speed railway and even the power supply of whole electric railway traction too mutually.
High speed and heavy haul railway extensively adopt based on IGBT, high-power friendship orthogonal type electric locomotive or the motor train unit of the full-control type devices such as IGCT, its core is the traction convertor that many group four-quadrant PWM control and multiplex is controlled, harmonic content is little, power factor is close to 1, but hand over orthogonal type electric locomotive or motor train unit traction power large, its rated power of bicycle EMU moved as large marshalling reaches 5 trains that 25MW(is equivalent to general fast railway), high-power single-phase that these are started in a large number load causes three phase network take imbalance of three-phase voltage degree (negative phase-sequence) as main power quality problem day by day serious, must come into one's own.
Theory and practice all show to adopt the cophase supply technology can be cancelling traction substation outlet phase-splitting, eliminate the power supply bottleneck, increase power supply capacity, strengthen energy-saving effect in, can also effectively administer negative-sequence current, reach and take imbalance of three-phase voltage degree GB limit value as main quality of power supply requirement, be conducive to promote the common and harmonious development of electric power and railway.
Present stage realizes that a key of cophase supply is the voltage-phase of traction net, it is determined by the traction port of the traction transformer of certain mode of connection, wherein, in traction substation, simple and direct, the most most economical mode of connection of various traction transformers is single-phase traction transformer, and China Express Railway, Line for Passenger Transportation extensively adopt Vv and the Vx wiring of single-phase wiring or development thus.Obviously, simple and direct, the most most economical single-phase traction transformer in the traction transformer mode of connection of traction substation of take is basis, be equipped with where necessary appropriate homophase (symmetry) compensation arrangement, cancel traction substation outlet phase-splitting to eliminate the power supply bottleneck thereby reach, administering the target that negative phase-sequence requires with the quality of power supply that meets imbalance of three-phase voltage degree (negative phase-sequence) limit value, is the preferential selection that realizes the cophase supply of the traction substation mode of connection and electric supply installation capacity matched well.
For this reason, the utility model people had once proposed (the Chinese utility model application number: 201210583674.X) with (the Chinese utility model application number: 201310227591.1) of a kind of single-phase composite type cophase supply power transformation structure of a kind of single-phase three phase combined cophase supply transformation device, the former is suitable for the neutral point heavy current grounding system and/or needs the occasion of output three-phase from electricity consumption, the latter is suitable for the occasion that the former limit of single-phase traction transformer mid point can be extracted out, a kind of three phase combined cophase supply power transformation structure is now proposed, be suitable for not needing the large current earthing of neutral point, the occasion that the former limit of single-phase traction transformer mid point can not be extracted out, especially existing Vv and the transformation of Vx wiring traction substation have been increased to new selection scheme.
The utility model content
The purpose of this utility model just is to provide a kind of three phase combined cophase supply power transformation structure, cancel the phase-splitting of traction substation outlet, optimize the technical-economic index of electrified railway in-phase power supply, negative phase-sequence (Voltage unbalance) impact of the three-phase system that elimination electric railway single-phase load causes, for cophase supply implements to provide selection scheme more.
The purpose of this utility model is realized by following technical scheme:
A kind of three phase combined cophase supply power transformation structure, comprise traction transformer TT, standby traction transformer TB, the first cophase supply device CPD1 and the second cophase supply device CPD2; The first cophase supply device CPD1 consists of the first high pressure matching transformer HMT1, the first AC-DC-AC converter ADA1 and the first traction matching transformer TMT1; The second cophase supply device CPD2 consists of the second high pressure matching transformer HMT2, the second AC-DC-AC converter ADA2 and the second traction matching transformer TMT2; Traction transformer TT, standby traction transformer TB, the first cophase supply device CPD1 and the second cophase supply device CPD2 are phase structure; The former limit of traction transformer TT winding, the first high pressure matching transformer HMT1 former limit winding and the second former limit of high pressure matching transformer HMT2 winding are connected to three groups of line voltages of electric power system, form triangle connection group; The former limit of traction transformer TT winding is connected same group of line voltage of electric power system with the former limit of standby traction transformer TB winding; The inferior limit winding of first and second high pressure matching transformer connects respectively the end that enters of first and second AC-DC-AC converter; The first and second AC-DC-AC converter go out the former limit that end connects respectively the first and second traction matching transformers, produce the voltage with traction transformer TT same phase and frequency; The voltage magnitude of inferior limit winding of TT limit winding of traction transformer, TB limit winding of standby traction transformer and two traction matching transformers identical with phase place and all with draw bus and join.When traction transformer TT fault or while overhauling according to plan, standby traction transformer TB puts into operation.
Can be equipped with the first standby high pressure matching transformer HMTB1 with the first high pressure matching transformer HMT1 same structure, be that the second high pressure matching transformer HMT2 is equipped with the second standby high pressure matching transformer HMTB2 of same structure with it; The singlecore of the first high pressure matching transformer HMT1, the second high pressure matching transformer HMT2 and traction transformer TT forms three traction transformer TG unshakable in one's determination; The singlecore of the first standby high pressure matching transformer HMTB1, the second standby high pressure matching transformer HMTB2 and standby traction transformer TB forms standby three traction transformer TGB unshakable in one's determination.When three traction transformer TG faults unshakable in one's determination or while overhauling according to plan, standby three traction transformer TGB unshakable in one's determination put into operation.
Operation principle of the present utility model is:
Normally in service, traction transformer TT and the first cophase supply device CPD1 and the traction load power supply of giving the traction net together with the second cophase supply device CPD2, traction transformer TT undertakes main power supply task, the first cophase supply device CPD1 and the second cophase supply device CPD2 undertake less important power supply task, and the traction transformer TT calculated capacity+first AC-DC-AC converter ADA1 that gains merit calculates transfer capacity+second AC-DC-AC converter ADA2 and calculates transfer capacity=traction burden with power calculated capacity; The first AC-DC-AC converter ADA1 calculates transfer capacity=second AC-DC-AC converter ADA2 and calculates transfer capacity; The first AC-DC-AC converter ADA1 and the second AC-DC-AC converter ADA2 calculate transfer capacity by causing that the exceed standard capacity of traction burden with power of part of imbalance of three-phase voltage degree determines; The meritorious calculated capacity of traction transformer is greater than the calculating transfer capacity of single AC-DC-AC converter.
That is to say, in course of normal operation, when traction burden with power power is less than or equal to single AC-DC-AC converter (the first AC-DC-AC converter ADA1, while the second AC-DC-AC converter ADA2) calculating 3 times of transfer capacity, traction transformer TT, the first AC-DC-AC converter ADA1, the second AC-DC-AC converter ADA2 three undertakes respectively 1/3 of traction burden with power power P, be designated as p, now, the negative sequence power that traction burden with power power p that traction transformer TT undertakes produces and the first AC-DC-AC converter ADA1 undertake the negative sequence power that the traction burden with power power p of (transmission) and traction burden with power power p that the second AC-DC-AC converter ADA2 undertakes (transmission) combine generation and offset, the synthetic negative sequence power that is traction substation is zero, the imbalance of three-phase voltage degree caused thus is also zero, when traction load active power is greater than the first AC-DC-AC converter ADA1 or the second AC-DC-AC converter ADA2 and calculates 3 times of transfer capacity, the first AC-DC-AC converter ADA1 and the second AC-DC-AC converter ADA2 calculate transfer capacity by it respectively and supply with, redundance is supplied with by traction transformer TT, now there is the residue negative sequence power circulate and cause Voltage unbalance, but the imbalance of three-phase voltage degree that it produces meets the GB requirement, can not exceed standard.
When traction is converted to Regenerative feedback, the active power that the first AC-DC-AC converter ADA1 and the second AC-DC-AC converter ADA2 transmit is all reverse.
High speed and heavy haul railway extensively adopt high-power friendship orthogonal type electric locomotive or the motor train unit based on full-control type devices such as IGBT, IGCT, its power factor, close to 1, is generally only taken into account its burden with power and is got final product, and contained load or burden without work is perceptual, its amount is minimum, can ignore.But when traction load or burden without work while can not ignore, as for the AC-DC electric locomotive time, can go out end by the first AC-DC-AC converter ADA1 or the second AC-DC-AC converter ADA2 and absorb a certain amount of capacitive reactive power and compensated; When traction is converted to Regenerative feedback, as the same.
In case of necessity, the first AC-DC-AC converter ADA1 and the second AC-DC-AC converter ADA2 also can provide harmonic compensation current.
The characteristic of the full-control type devices such as IGBT, IGCT that the AC-DC-AC converter in cophase supply device adopts makes so, the general overload capacity of not considering AC-DC-AC converter, and the high pressure matching transformer HMT in cophase supply device and traction matching transformer TMT rated capacity can enter end and go out to hold rated capacity and self capability of overload to determine with reference to corresponding AC-DC-AC converter respectively.Standby traction transformer capacity mainly should require to determine according to failure condition and the maintenance of traction transformer TT and cophase supply device, consider the impact of corresponding imbalance of three-phase voltage degree simultaneously, generally can select with traction transformer TT same capability or increase and decrease the traction transformer of a capacitance grade.
The utility model beneficial effect compared with prior art is:
One, the utility model can greatly reduce capacity and the proportion thereof of AC-DC-AC converter in expensive cophase supply device, thereby greatly reduces one-time investment.
Two, the utility model especially is convenient to the cophase supply transformation of current high-speed railway and the widely used Vv wiring of Line for Passenger Transportation or Vx wiring traction substation; Also be suitable for substituting traction transformer and implementing to connect cophase supply with one group of new cophase supply device future.
Three, the utility model can further strengthen the energy-saving effect of tractive power supply system.After implementing cophase supply, the up-downgoing supply arm of traction substation merges, more be conducive to the utilization to regeneration train electric energy of the tractor-trailer train that wherein moves, the invertibity of the AC-DC-AC converter operating mode of cophase supply device in addition, also can send electric energy unnecessary, up to standard to electric power system, greatly increase energy-saving effect.
Four, the inferior limit winding of the first high pressure matching transformer HMT1 of the present utility model and the second high pressure matching transformer HMT2 forms the V wiring, can provide three-phase from electricity consumption;
Five,, except the traction substation and traction net that are suitable for directly power supply, also be applicable to traction substation and the traction net thereof of AT power supply.
Six, the utility model advanced technology, reliable, easy to implement.
Below in conjunction with the drawings and specific embodiments, the utility model will be further described.
The accompanying drawing explanation
Fig. 1 is the cophase supply power transformation organigram of the traction substation of embodiment.
Fig. 2 is the AC-DC-AC converter connection diagram in the utility model cophase supply device.
Fig. 3 is a kind of connection diagram of the utility model for the AT tractive power supply system of 2 * 27.5kV.
Fig. 4 is the cophase supply power transformation organigram that the utility model has standby high pressure matching transformer.
Fig. 5 is the organigram of the cophase supply power transformation for 2 * 27.5kV AT tractive power supply system that the utility model has standby high pressure matching transformer.
Embodiment
Embodiment
As shown in Figure 1, a kind of three phase combined cophase supply power transformation structure, comprise traction transformer TT, standby traction transformer TB, the first cophase supply device CPD1 and the second cophase supply device CPD2; The first cophase supply device CPD1 consists of the first high pressure matching transformer HMT1, the first AC-DC-AC converter ADA1 and the first traction matching transformer TMT1; The second cophase supply device CPD2 consists of the second high pressure matching transformer HMT2, the second AC-DC-AC converter ADA2 and the second traction matching transformer TMT2; Traction transformer TT, standby traction transformer TB, the first cophase supply device CPD1 and the second cophase supply device CPD2 are phase structure; The former limit of traction transformer TT winding, the first high pressure matching transformer HMT1 former limit winding and the second former limit of high pressure matching transformer HMT2 winding are connected to three groups of line voltages of electric power system high voltage bus H-Bus, form triangle connection group; The former limit of traction transformer TT winding is connected the same group of line voltage of electric power system high voltage bus H-Bus with the former limit of standby traction transformer TB winding, in figure, the former limit of traction transformer TT winding is connected the line voltage BC of electric power system high voltage bus H-Bus with the former limit of standby traction transformer TB winding, and the first high pressure matching transformer HMT1 former limit winding and the second former limit of high pressure matching transformer HMT2 winding are connected to line voltage AB and the CA of electric power system high voltage bus H-Bus; The inferior limit winding of first and second high pressure matching transformer connects respectively the end that enters of first and second AC-DC-AC converter; The first and second AC-DC-AC converter go out the former limit that end connects respectively the first and second traction matching transformers, produce the voltage with traction transformer TT same phase and frequency; The voltage magnitude of inferior limit winding of traction transformer time limit winding, standby traction transformer time limit winding and two traction matching transformers identical with phase place and all with draw bus T-Bus and join.In figure, T is contact line, and G is rail, and in K1, K2, K3, K4, K5, K6, K7, K8, each circuit breaker of K9, K1, K3, K5, K7 are the two-phase circuit breaker, and K2, K4, K6, K8, K9 are single-phase circuit breaker.
The electric pressure that high pressure matching transformer time limit winding and AC-DC-AC converter enter to hold should be weighed high pressure matching transformer original edge voltage grade, former limit no-load voltage ratio and AC-DC-AC converter capacity and enter the cascade situation of end, is typically chosen at present in 6kV to 10kV scope and is advisable.
When traction transformer TT fault or while overhauling according to plan, standby traction transformer TB puts into operation.
Operation principle of the present utility model is:
Normally in service, traction transformer TT and the first cophase supply device CPD1 and the traction load power supply of giving the traction net together with the second cophase supply device CPD2, traction transformer TT undertakes main power supply task, the first cophase supply device CPD1 and the second cophase supply device CPD2 undertake less important power supply task, and the traction transformer TT calculated capacity+first AC-DC-AC converter ADA1 that gains merit calculates transfer capacity+second AC-DC-AC converter ADA2 and calculates transfer capacity=traction burden with power calculated capacity; The first AC-DC-AC converter ADA1 calculates transfer capacity=second AC-DC-AC converter ADA2 and calculates transfer capacity; The first AC-DC-AC converter ADA1 and the second AC-DC-AC converter ADA2 calculate transfer capacity by causing that the exceed standard capacity of traction burden with power of part of imbalance of three-phase voltage degree determines.
That is to say, in course of normal operation, when traction burden with power power is less than or equal to the first AC-DC-AC converter ADA1 or the second AC-DC-AC converter ADA2 and calculates 3 times of transfer capacity, traction transformer TT and the first AC-DC-AC converter ADA1 and the second AC-DC-AC converter ADA2 undertake respectively 1/3 of traction burden with power power P, be designated as p, now, the negative sequence power that traction burden with power power p that traction transformer TT undertakes produces and the first AC-DC-AC converter ADA1 undertake the negative sequence power that the traction burden with power power p of (transmission) and traction burden with power power p that the second AC-DC-AC converter ADA2 undertakes (transmission) combine generation and offset, the synthetic negative sequence power that is traction substation is zero, the imbalance of three-phase voltage degree caused thus is also zero, when traction load active power is greater than 3 times of calculating transfer capacity of the first AC-DC-AC converter ADA1 or the second AC-DC-AC converter ADA2, the first AC-DC-AC converter ADA1 and the second AC-DC-AC converter ADA2 calculate transfer capacity by it respectively and supply with, redundance is supplied with by traction transformer TT, now there is the residue negative sequence power circulate and cause Voltage unbalance, but the imbalance of three-phase voltage degree that it produces meets the GB requirement, can not exceed standard.
When traction is converted to Regenerative feedback, the active power that the first AC-DC-AC converter ADA1 and the second AC-DC-AC converter ADA2 transmit is all reverse.
High speed and heavy haul railway extensively adopt high-power friendship orthogonal type electric locomotive or the motor train unit based on full-control type devices such as IGBT, IGCT, its power factor, close to 1, is generally only taken into account its burden with power and is got final product, and contained load or burden without work is perceptual, its amount is minimum, can ignore.
The actual traction substation of take is example, power factor=1, traction burden with power calculated capacity=48MVA, the traction load capacity that meets the requirement of imbalance of three-phase voltage degree GB is 18MVA, do not consider the capability of overload of AC-DC-AC converter, the first AC-DC-AC converter ADA1 of cophase supply device calculates transfer capacity=second AC-DC-AC converter ADA2 and calculates transfer capacity=(48MVA-18MVA)/3=10MVA; High pressure matching transformer in cophase supply device and traction matching transformer rated capacity can enter to hold and go out to hold rated capacity and self capability of overload to determine with reference to corresponding AC-DC-AC converter respectively, as consider 1.2 times of capability of overloads of transformer, the rated capacity of two high pressure matching transformers and two traction matching transformers should be 10/1.2MVA=8.33MVA, can select the single-phase transformer that rated capacity is the 8MVA standard class; Traction transformer calculated capacity=the 48-20=28MVA that gains merit, while not considering its capability of overload, can select single-phase traction transformer and standby traction transformer that rated capacity is the 31.5MVA standard class, and when considering 1.5 times of capability of overloads of traction transformer, traction transformer calculated capacity=28/1.5=18.67MVA, can select the single-phase traction transformer that rated capacity is the 20MVA standard class.
Standby traction transformer capacity mainly should require to determine according to failure condition and the maintenance of traction transformer and cophase supply device, consider the impact of corresponding imbalance of three-phase voltage degree simultaneously, general select with the traction transformer same capability or increase and decrease the traction transformer of a capacitance grade.In this example, selecting the single-phase traction transformer that rated capacity is the 20MVA standard class is standby traction transformer.
When normal, traction transformer and cophase supply device work, standby traction transformer is not worked; When traction transformer exits, standby traction transformer is devoted oneself to work; When cophase supply device is out of service, traction transformer can work independently in short-term, and standby traction transformer is alternative traction transformer work also.
Fig. 2 is the connection layout of AC-DC-AC converter ADA in the utility model cophase supply device, AC-DC-AC converter ADA for example, for adopting single-phase PWM (pulse-width modulation) current transformer of high-power electric and electronic semiconductor device (integral gate change transistor IGCT or insulated gate bipolar transistor IGBT), AC-DC-the AC converter connected by DC energy storage electric capacity, the reactor Li of its two ends series connection and the reactance value of reactor Lo can be considered together with the leakage reactance of high pressure matching transformer and traction matching transformer respectively in the lump.
It should be noted that, adopt the modern power electronic semiconductor device of the function admirables such as integral gate change transistor IGCT or insulated gate bipolar transistor IGBT due to AC-DC-AC converter in cophase supply device, its manufacturing cost is higher, while is due to the division of labor of " traction transformer is undertaken main power supply task; cophase supply device is undertaken less important power supply task ", generally do not adopt 100% standby mode as traction transformer, but after balance cost and reliability, adopt module level standby, to reduce costs, and guarantee reliability.
Fig. 3 is that the utility model is for the AT(autotransformer) a kind of connection diagram of tractive power supply system, wherein, the connected mode of high voltage bus H-Bus is identical with Fig. 1, and traction bus T-Bus voltage is 2 * 27.5kV, F, T are respectively negative feeder and the contacts wire in AT traction net TS, and G is rail.Obviously, in the cophase supply power transformation structure of 2 * 27.5kV AT supply power mode, the inferior limit winding mid point of traction transformer TT, standby traction transformer TB is all extracted ground connection out, and, when traction transformer TT, TB limit winding mid point of standby traction transformer are not all extracted out, be the AT supply power mode of a kind of 55kV.Generally, the inferior limit winding mid point of the first traction matching transformer TMT1 and the second traction matching transformer TMT2 is not all extracted out.In figure, K1, K2, K3, K4, K5, K6, K7, K8, K9 are the two-phase circuit breaker.
Fig. 4 is the cophase supply power transformation organigram that the utility model has standby high pressure matching transformer.In figure, in order to save occupation of land, further reduce costs, the singlecore of the first high pressure matching transformer HMT1, the second high pressure matching transformer HMT2 and traction transformer TT forms three traction transformer TG unshakable in one's determination; The singlecore of the first standby high pressure matching transformer one HMTB1, the second standby high pressure matching transformer HMTB2 and standby traction transformer TB forms standby three traction transformer TGB unshakable in one's determination.Inferior limit winding for convenience of high pressure matching transformer HMT, standby high pressure matching transformer HMTB enters being connected of end with AC-DC-AC converter ADA, and low pressure (as 10kV) compensation bus L-Bus1, L-Bus2 and corresponding circuit breaker are set; In figure, T is contact line, and G is rail, and in K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, K11, K12, each circuit breaker of K13, K1, K9 are three-phase breaker, and other are single-phase circuit breaker.
When three traction transformer TG faults unshakable in one's determination or while overhauling according to plan, standby three traction transformer TGB unshakable in one's determination put into operation.
Fig. 5 is the cophase supply power transformation organigram that the utility model has the tractive power supply system of the AT for 2 * 27.5kV of standby high pressure matching transformer.In figure, in order to save occupation of land, further reduce costs, the singlecore of the first high pressure matching transformer HMT1, the second high pressure matching transformer HMT2 and traction transformer TT forms three traction transformer TG unshakable in one's determination; The singlecore of the first standby high pressure matching transformer HMTB1, the second standby high pressure matching transformer HMTB2 and standby traction transformer TB forms standby three traction transformer TGB unshakable in one's determination.Traction bus T-Bus voltage is 2 * 27.5kV, and F, T are respectively negative feeder and the contacts wire in AT traction net TS, and G is rail.Obviously, in the cophase supply power transformation structure of 2 * 27.5kV AT supply power mode, the inferior limit winding mid point of traction transformer TT, standby traction transformer TB is all extracted ground connection out, and, when traction transformer TT, TB limit winding mid point of standby traction transformer are not all extracted out, be the AT supply power mode of a kind of 55kV.Generally, the inferior limit winding mid point of the first traction matching transformer TMT1 and the second traction matching transformer TMT2 is not all extracted out.Inferior limit winding for convenience of high pressure matching transformer HMT, standby high pressure matching transformer HMTB enters being connected of end with AC-DC-AC converter ADA, and low pressure (as 10kV) compensation bus L-Bus1, L-Bus2 and corresponding circuit breaker are set.In K1, K2, K3, K4, K5, K6, K7, K8, K9, K10, K11, K12, each circuit breaker of K13, K1, K9 are three-phase breaker, and K2, K6, K8, K10, K13 are the two-phase circuit breaker, and K3, K4, K5, K7, K11, K12 are single-phase circuit breaker.
Claims (2)
1. a three phase combined cophase supply power transformation structure, comprise traction transformer TT, standby traction transformer TB, the first cophase supply device CPD1 and the second cophase supply device CPD2; Wherein: the first cophase supply device CPD1 consists of the first high pressure matching transformer HMT1, the first AC-DC-AC converter ADA1 and the first traction matching transformer TMT1; The second cophase supply device CPD2 consists of the second high pressure matching transformer HMT2, the second AC-DC-AC converter ADA2 and the second traction matching transformer TMT2; Traction transformer TT, standby traction transformer TB, the first cophase supply device CPD1 and the second cophase supply device CPD2 are phase structure; It is characterized in that: the former limit of traction transformer TT winding, the first high pressure matching transformer HMT1 former limit winding and the second former limit of high pressure matching transformer HMT2 winding are connected to three groups of line voltages of electric power system, form triangle connection group; The former limit of traction transformer TT winding is connected same group of line voltage of electric power system with the former limit of standby traction transformer TB winding; The first high pressure matching transformer HMT1 and the inferior limit winding of the second high pressure matching transformer HMT2 are connected respectively the end that enters of the first AC-DC-AC converter ADA1 and the second AC-DC-AC converter ADA2; The end that goes out of the first AC-DC-AC converter ADA1 and the second AC-DC-AC converter ADA2 is connected respectively the first traction matching transformer TMT1 and the second former limit of drawing matching transformer TMT2, produces the voltage with traction transformer TT same phase and frequency; The voltage magnitude of the inferior limit winding of TT limit winding of traction transformer, TB limit winding of standby traction transformer and two traction matching transformers identical with phase place and all with the traction bus join.
2. a kind of three phase combined cophase supply power transformation according to claim 1 is constructed, it is characterized in that: being that the first high pressure matching transformer HMT1 is equipped with the first standby high pressure matching transformer HMTB1 of same structure with it, is that the second high pressure matching transformer HMT2 is equipped with the second standby high pressure matching transformer HMTB2 of same structure with it; The singlecore of the first high pressure matching transformer HMT1, the second high pressure matching transformer HMT2 and traction transformer TT forms three traction transformer TG unshakable in one's determination; The singlecore of the first standby high pressure matching transformer HMTB1, the second standby high pressure matching transformer HMTB2 and standby traction transformer TB forms standby three traction transformer TGB unshakable in one's determination.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427415A (en) * | 2013-07-22 | 2013-12-04 | 西南交通大学 | Three-phase combined same-phase power supply and transformation structure |
| CN107962982A (en) * | 2017-12-05 | 2018-04-27 | 西南交通大学 | A kind of three-phase traction electric power system |
-
2013
- 2013-07-22 CN CN 201320436912 patent/CN203352171U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427415A (en) * | 2013-07-22 | 2013-12-04 | 西南交通大学 | Three-phase combined same-phase power supply and transformation structure |
| CN107962982A (en) * | 2017-12-05 | 2018-04-27 | 西南交通大学 | A kind of three-phase traction electric power system |
| CN107962982B (en) * | 2017-12-05 | 2023-10-13 | 西南交通大学 | Three-phase traction power supply system and vehicle-mounted power supply system |
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