CN202633964U - Energy-fed type traction substation and power supply system - Google Patents
Energy-fed type traction substation and power supply system Download PDFInfo
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- CN202633964U CN202633964U CN 201220142876 CN201220142876U CN202633964U CN 202633964 U CN202633964 U CN 202633964U CN 201220142876 CN201220142876 CN 201220142876 CN 201220142876 U CN201220142876 U CN 201220142876U CN 202633964 U CN202633964 U CN 202633964U
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Abstract
The utility model provides an energy-fed type traction substation and a power supply system. The energy-fed type traction substation comprises a rectiformer cabinet. A multi-winding transformer is arranged in the rectiformer cabinet. The multi-winding transformer is provided with a primary winding and a plurality of secondary windings, wherein the plurality of secondary windings adopt the same connection mode. The energy-fed type traction substation also comprises an energy-fed type traction power supply cabinet and a plurality of large-power bidirectional converters are arranged in the energy-fed type traction power supply cabinet. Each of the secondary windings of the multi-winding transformer is respectively connected with the AC side of one of the large-power bidirectional converters. Due to the adoption of the energy-fed type traction substation and the power supply system, the absorption problem of regenerative braking energy is solved. The braking energy is converted into electric energy and fed back to an electric network, so that the recycling of regenerative energy is realized. Meanwhile, due to the default of regenerative braking resistors, the weight of a transportation vehicle is reduced and the transportation efficiency is improved. The operating state of the traction substation can be monitored in real time through the monitoring center of the power supply system. Thus, the traction substation can be maintained conveniently, effectively and timely.
Description
Technical field
The utility model embodiment relates to the power supply technology, relates in particular to a kind ofly can present formula traction substation and electric power system.
Background technology
Novel linear motor transportation system; The employing linear electric motors advance; Have climb the gradient big, take up an area of less, advantage such as pork barrel is low, speed per hour is fast, operate steadily, be easy to realize automatic control, noiselessness, do not discharge harmful waste gas, be beneficial to environmental protection, operation maintenance and energy charge are low; Be a kind of desirable short distance Coal Transport mode, reduction Coal Transport cost, energy-saving and emission-reduction, raising coal resources utilance are had crucial meaning.
Tractive power supply system to system safety, efficient, reliability service, plays crucial effects as an important component part of novel linear motor transportation system.
In order to reduce to transport the weight of coal dolly, improve conevying efficiency, each is transported regenerative braking resistance is not set on the coal dolly; This just requires each traction substation must have the regenerated energy absorbability, and rotate the kinetic energy that produces to useless unwanted or harmful inertia of motor and be converted into electric energy, and feedback grid; Regeneration cycle is used; Produce braking moment simultaneously, make motor stop useless inertia fast and rotate traditional tractive power supply system based on diode rectification; Energy can only one-way transmission, can not meet the demands.
Consider that coal mining area terrain environment is complicated, the traction substation maintenance work is arduous, requires that each traction substation running status is carried out remote centralized and monitors in real time.
The utility model content
The utility model provides a kind of can present formula traction substation and electric power system, absorbs problem in order to the regenerating braking energy that solves traction substation in the prior art, realizes recycling of regenerating braking energy.
The utility model provides a kind of can present the formula traction substation, comprising:
The rectifier transformer cabinet; Be provided with a multi winding transformer in the said rectifier transformer cabinet; Said multi winding transformer has a former limit winding and a plurality of secondary winding; And said a plurality of secondary winding adopts identical connected mode, and the former limit winding of said multi winding transformer is with to exchange medium voltage network continuous;
Can present formula traction power supply cabinet; Said can the feedback is provided with a plurality of great power bidirectional current transformers in the formula traction power supply cabinet; Receive after the anodal parallel connection of said a plurality of great power bidirectional current transformer DC side and can present the anodal output of formula traction power supply cabinet; Receive after the parallel connection of said a plurality of great power bidirectional current transformer DC side negative pole and can present the output of formula traction power supply cabinet negative pole, each secondary winding of said multi winding transformer links to each other with a great power bidirectional AC side of converter respectively.
Aforesaidly can present the formula traction substation, preferably, the power device of great power bidirectional current transformer is the insulated gate bipolar transistor power model, and said great power bidirectional current transformer adopts the three phase full bridge structure.
Aforesaidly can present the formula traction substation; Preferably; Also comprise the ac high-voltage switch cubicle, be provided with a high-voltage AC breaker in the said ac high-voltage switch cubicle, the former limit winding of said transformer through said high-voltage AC breaker with to exchange medium voltage network continuous.
Aforesaidly can present the formula traction substation; Preferably; Also comprise the AC low-tension switch cubicle; Be provided with a plurality of low-voltage alternating-current circuit breakers in the said AC low-tension switch cubicle, between the secondary winding of said multi winding transformer and said each great power bidirectional AC side of converter, be connected in series a low-voltage alternating-current circuit breaker respectively.
Aforesaidly can present the formula traction substation; Preferably; Also comprise the dc feeder switch cubicle; Be provided with a dc circuit breaker and a dc-isolation switch in the said dc feeder switch cubicle, said dc-isolation switch and dc circuit breaker are serially connected in respectively on the positive and negative electrode bus of said dc feeder switch cubicle, saidly can present formula traction power supply cabinet DC side output and link to each other with said dc feeder switch cubicle input.
Aforesaidly can present the formula traction substation, preferably, also comprise control device, said control device comprises:
Data input module; Comprise transducer, data conditioning circuit and modulus collecting unit; Said transducer is used for gathering the state parameter that can present formula traction substation great power bidirectional current transformer; Said data conditioning circuit is used for the state parameter that collects is carried out processing and amplifying, and said modulus collecting unit is used for the state parameter after amplifying is carried out analog-to-digital conversion;
Data processing module is used for the state parameter of said data input module collection is carried out computing, accomplishes corresponding control algolithm, produces pwm pulses;
Control module receives the pwm pulses signal of data processing module output, outputs to said great power bidirectional current transformer again, is used to control the break-make of the insulated gate bipolar transistor of said great power bidirectional current transformer;
Comparison module; Be used for the output signal of said data conditioning circuit and the protection threshold value of setting are compared; When surpassing the protection threshold value of setting, export a fault-signal and give said control module, the output of the automatic locking pulse duration-modulated pulse of said control module signal.
Aforesaidly can present the formula traction substation; Preferably; The data processing module of control device is the two closed-loop controls based on PID control; And comprise current inner loop controlling unit and outer voltage controlling unit, all great power bidirectional current transformer common voltage outer shroud controlling unit circuit, each great power bidirectional current transformer has independently current inner loop controlling unit circuit.
The utility model also provides a kind of electric power system, comprising:
What the utility model any embodiment was provided can present the formula traction substation, and the said formula traction substation of presenting can be presented the positive pole output of formula traction power supply cabinet and links to each other with contact line, and the negative pole that can present formula traction power supply cabinet is exported and linked to each other with rail;
Surveillance center, said Surveillance center comprises industrial computer and data transmission unit, said data transmission unit is used for receiving the state parameter that can present formula traction substation great power bidirectional current transformer through wired or wireless mode.
What the utility model provided can present formula traction substation and electric power system, has solved the absorption problem of regenerating braking energy, and braking energy is converted into electric energy and feedback grid, has realized that regenerated energy recycles, and produces braking moment simultaneously, shortens braking time; The default weight that reduces the transportation car body of regenerative braking resistance has improved conevying efficiency; Surveillance center can monitor the running status of traction substation in real time, carries out the maintenance of traction substation easily and effectively, in time.
Description of drawings
Fig. 1 is the sketch map of the utility model tractive power supply system that embodiment provides;
What Fig. 2 provided for the utility model embodiment one can present formula traction substation composition frame chart;
Fig. 3 is a great power bidirectional current transformer main circuit diagram among the utility model embodiment one;
Fig. 4 is a great power bidirectional current transformer fundamental diagram among the utility model embodiment one;
The great power bidirectional current transformer control device composition frame chart that Fig. 5 provides for the utility model embodiment two;
The data processing module block diagram of the great power bidirectional current transformer control device that Fig. 6 provides for the utility model embodiment three;
Fig. 7 is Surveillance center's equipment composition frame chart among the utility model embodiment four.
Embodiment
Embodiment one
Shown in Figure 2 provided for the utility model embodiment one can present formula traction substation composition frame chart; Can present the formula traction substation is applied in the tractive power supply system; Be the core of tractive power supply system,, play crucial effects whole system safety, efficient, reliability service.The dc output power that can present the formula traction substation is that going of vehicle provides power source in the tractive power supply system, and is long between service area, can reduce the quantity that can present the formula traction substation to greatest extent, practices thrift investment.
The sketch map of the tractive power supply system that is provided for the utility model embodiment shown in Figure 1; It can be presented formula traction substation 101, Surveillance center 102, contact line 103 and rail 104 by N and form; Surveillance center 102 can present formula traction substation 101 respectively and communicate by letter with each; Thereby monitor the operating state that each can present formula traction substation 101, maintain easily.The AC side that can present formula traction substation 101 connects interchange medium voltage network 100, and to obtain power supply, its DC side is connected to contact line 103 and rail 104, is used for vehicle 105 power supplies of operation between contact line 103 and rail 104.
As shown in Figure 2, can present formula traction substation 101 in the present embodiment and comprise rectifier transformer cabinet 2 and can present formula traction power supply cabinet 4.Wherein, be provided with a multi winding transformer in the rectifier transformer cabinet 2, the former limit winding of multi winding transformer with exchange medium voltage network 100 and link to each other; This multi winding transformer has a former limit winding and a plurality of secondary winding, and the identical connected mode of a plurality of secondary winding employing, for the former limit of multi winding transformer winding and being connected of secondary winding multiple implementation can be arranged; For example; Former limit winding adopts the Y-connection mode, and each secondary winding all adopts the triangle connected mode; The triangle connected mode of secondary winding makes transformer secondary winding output voltage waveforms approach sine wave, helps rectification further.
Can present and be provided with N great power bidirectional current transformer 7 in the formula traction power supply cabinet 4; N >=2 wherein; Multi winding transformer secondary winding respectively with great power bidirectional current transformer 7 AC side link to each other; Receive after N the anodal parallel connection of great power bidirectional current transformer 7 DC sides and can present the 4 anodal outputs of formula traction power supply cabinet, receive after N the great power bidirectional current transformer 7 DC side negative pole parallel connections and can present the output of formula traction power supply cabinet 4 negative poles, because each secondary winding output voltage of multi winding transformer is identical; Make that N great power bidirectional current transformer 7 AC side input voltages are identical; Thereby realize N great power bidirectional current transformer 7 DC side parallels output, be used for vehicle 105 (referring to Fig. 1) power supply of operation between contact line 103 and rail 104, power source is provided.N great power bidirectional current transformer 7 backups each other when work, and when great power bidirectional current transformer 7 broke down, whole system still can work on, and guaranteed the continuity of power supply and the reliability of system as wherein one or more (N-1 at most).
What the utility model provided can present formula traction substation 101; Owing to can present in the formula traction power supply cabinet and adopt the great power bidirectional current transformer; Realize the two-way variation of electric current, solved the absorption problem of regenerating braking energy, can braking energy be converted into electric energy and feedback grid; Realized that regenerated energy recycles, whole system has energy-efficient, safe and reliable distinguishing feature.
In order to guarantee to present the fail safe of formula traction substation 101 in practical work process; And when preventing certain device fails, cause miscellaneous equipment to damage, need in presenting formula traction substation 101, add protective device; For example; Circuit breaker in time cuts off circuit when breaking down, play a protective role.
Be to realize protection, can ac high-voltage switch cubicle 1 be set with exchanging between the medium voltage network presenting formula traction substation 101, be provided with a high-voltage AC breaker Q in the high-tension switch cabinet 1 the whole system circuit
Ac, the former limit of the multi winding transformer of rectifier transformer cabinet 2 winding is through high-voltage AC breaker Q
Ac Medium voltage network 100 is continuous with exchanging, and is used to control exchange medium voltage network 100 and can present the break-make that formula traction substation 101 is connected, and when breaking down, cuts off circuit, plays a protective role; Preferably also can and can present a low-voltage alternating-current switch cubicle 3 is set between the formula traction power supply cabinet 4 at rectifier transformer cabinet 2; Be provided with N low-voltage alternating-current circuit breaker Q in the low-voltage alternating-current switch cubicle 3; Wherein, be connected in series a low-voltage alternating-current circuit breaker Q respectively between rectifier transformer cabinet 2 transformer secondary windings and great power bidirectional current transformer 7 AC side, the low-voltage alternating-current circuit breaker Q can be in the time presenting formula traction power supply cabinet 4 and break down; In time cut off major loop, play a protective role.
Because equipment fault causes tractive power supply system normally not move; Need keep in repair faulty equipment; And because tractive power supply system is normally operated in high pressure, powerful operational environment; Also need carry out periodic maintenance, and present maintenance, maintenance work mainly are through manual type, need before maintenance, initiatively cut off major loop to tractive power supply system especially traction substation.
The mode of cut-out traction substation major loop has a variety of, for example, can between the DC side that can present formula traction power supply cabinet 4 and contact line 103 and rail 104, a dc feeder switch cubicle 5 be set, and is provided with a dc circuit breaker Q in the dc feeder switch cubicle 5
DcWith a dc-isolation switch Q
s, wherein, dc circuit breaker Q
DcWith dc-isolation switch Q
sBe serially connected in respectively on the positive and negative electrode bus of dc feeder switch cubicle 5, the DC side output that can present great power bidirectional current transformer 7 in the formula traction power supply cabinet 4 links to each other dc-isolation switch Q with the input of dc feeder switch cubicle 5
sBe used on dc feeder switch cubicle 5 negative busbars, forming obvious waypoint, be convenient to system maintenance, guarantee personal safety.Dc circuit breaker Q
DcThe break-make of control dc feeder switch cubicle 5 positive bus-bars plays direct current overload protection and short-circuit protection, the dc circuit breaker Q here
DcAlso can realize protection to the whole system circuit.
Shown in Figure 3 for presenting the main circuit diagram of great power bidirectional current transformer in the formula power transformation cabinet in the present embodiment; Connected mode and the selection that can present power device in the formula traction power supply cabinet 4 are the keys that realization can be presented formula traction substation 101, and its running state parameter directly reacts the performance of whole system.
Can present in the present embodiment and be provided with N great power bidirectional current transformer 7 in the formula traction power supply cabinet 4; N great power bidirectional current transformer 7 links to each other with a secondary winding of rectifier transformer cabinet 2 multi winding transformers respectively; N great power bidirectional current transformer 7 DC side anodal with negative pole respectively after the parallel connection, be connected respectively to the positive and negative electrode that can present formula traction power supply cabinet 4 again and export.Wherein, great power bidirectional current transformer 7 adopts the three phase full bridge structure, realizes the rectifying conversion of AC-to DC, has the characteristics of VD stable and controllable, has improved the fail safe and the reliability of system.Wherein, The power device 6 of great power bidirectional current transformer 7 can be insulated gate bipolar transistor (Insulated Gate Bipolar Transistor; Abbreviate " IGBT " as) power model; IGBT power model driving power is little, is fit to very much be applied to fields such as alternating current machine, frequency converter, traction transmission.N great power bidirectional current transformer 7 AC side A phase, B phase, C are connected in series an inductance L mutually respectively, and inductance L plays the energy storage effect under vehicle towed operating mode, under the car brakeing operating mode, strobe; N great power bidirectional current transformer 7 DC sides difference shunt capacitance C, capacitor C plays the effect of energy storage and filtering.
Shown in Figure 4 is great power bidirectional current transformer fundamental diagram in the present embodiment, as shown in Figure 4, u
UvBe the U phase voltage of rectifier transformer cabinet 2 multi winding transformer secondary windings, i.e. great power bidirectional current transformer 7 AC side A phase input voltages, and immobilize u
AoBe great power bidirectional current transformer 7 AC side A phase voltages, i
aBe great power bidirectional current transformer 7 AC side A phase currents, L is great power bidirectional current transformer 7 AC side A phase inductances, if u
Uv＞u
Ao, i then
aFlow to the right, promptly flow to the great power bidirectional current transformer by exchanging medium voltage network; If u
Uv＜u
Ao, i then
aFlow left, promptly flow to and exchange medium voltage network 100, thereby realize the absorption of regenerating braking energy by great power bidirectional current transformer 7, and feedback grid.Under the car brakeing operating mode, great power bidirectional current transformer 7 gets into inversion automatically can present operating mode, injects AC side by great power bidirectional current transformer 7 DC side absorption and regeneration braking energies, final feedback grid.
Embodiment two
The control device composition frame chart of the great power bidirectional current transformer that is provided for the utility model embodiment two shown in Figure 5.Control device 10 is used for controlling the break-make of great power bidirectional current transformer 7 power devices, and control great power bidirectional current transformer 7 dc voltage U
DcOutput, guarantee system works in safe voltage, and make U
DcStable, controlled.
Wherein, Transducer 111 is used for gathering the state parameter that can present formula traction substation great power bidirectional current transformer; Data conditioning circuit 102 is used for the state parameter that collects is carried out processing and amplifying, and modulus collecting unit 113 is used for the state parameter after amplifying is carried out analog-to-digital conversion; Data processing module 102 is used for the state parameter that data input module 101 is gathered is carried out computing, accomplishes corresponding control algolithm, produces pwm pulses; Control module 104 is used to receive the pwm pulses signal of data processing module 102 outputs, and pulse signal amplified outputs to the great power bidirectional current transformer again, is used to control the break-make of the insulated gate bipolar transistor of said great power bidirectional current transformer; Comparison module 103 is used for the output signal after said data conditioning circuit 102 processing and amplifying and the protection threshold value of setting are compared; When surpassing the protection threshold value of setting; Export a fault-signal and give said control module 104, the output of said control module 104 automatic locking pulse duration-modulated pulse signals.
The course of work of this control device 10 is following:
Can present the state parameter that the formula traction substation can be presented great power bidirectional current transformer 7 in the formula traction power supply cabinet 4 through transducer 111 collections; In conjunction with shown in Figure 3, said state parameter comprises great power bidirectional current transformer 7 great power bidirectional current transformers 7 AC side A phase input voltage u
Uv, B phase input voltage u
Vw, C phase input voltage u
Uw, AC side A phase current i
a, B phase current i
b, C phase current i
cWith dc voltage U
Dc
State parameter after A/D collecting unit 113 will amplify carries out analog-to-digital conversion, realizes the conversion of analog signal to digital signal, so that the running status of control device 10 control great power bidirectional current transformers 7;
The output signal of comparison module 103 after with data conditioning circuit 112 processing and amplifying, the state parameter that can present great power bidirectional current transformer 7 in the formula traction power supply cabinet 4 after promptly amplifying, as: the dc voltage U of great power bidirectional current transformer 7
DcCompare with the protection threshold value of setting, when surpassing the protection threshold value of setting, export a fault-signal and give control module 104; Control module 104 is received the output of blocking pwm pulse signal automatically behind the fault-signal; The power device 6 of great power bidirectional current transformer 7 breaks off, thereby great power bidirectional current transformer 7 is out of service, prevents the breaking-up of equipment.
Embodiment three
The data processing module block diagram of the great power bidirectional current transformer control device that is provided for the utility model embodiment three shown in Figure 6.Data processing module 102 is cores of control device 10, realizes great power bidirectional current transformer 7 DC side output voltage U
DcControl, and the pwm pulse of output control great power bidirectional current transformer 7 power device break-makes.
PID control circuit simple in structure, parameter are easy to adjustment, and have good robustness, make the DC side output voltage U of traction power supply cabinet 4
DcMore stable.
The DC side output voltage U of 90 pairs of great power bidirectional current transformers 7 of outer voltage controlling unit circuit
DcCarry out the PID closed-loop control, to guarantee U
DcFollow the tracks of the direct voltage set-point U of outside input
* DcCurrent inner loop controlling unit circuit 91 is realized N the great power bidirectional current transformer 7 ac-side currents total active current component of d axle i in two cordic phase rotators system
dWith the total reactive current component of q axle i
qClosed-loop control.Wherein, N great power bidirectional current transformer 7 common voltage outer shroud controlling unit circuit 90, each great power bidirectional current transformer 7 then has independently current inner loop controlling unit circuit 91.
1, under vehicle towed operating mode, great power bidirectional current transformer 7 gets into the traction rectifier operating mode automatically, absorbs energy by AC side and injects DC side, presses U via the regulating action maintenance direct current net of outer voltage control circuit
DcConstant, its detailed process is:
Under vehicle towed operating mode, the DC side absorption energy from great power bidirectional current transformer 7 causes supporting electric capacity (being great power bidirectional current transformer 7 dc bus capacitor C among Fig. 3) discharge, and direct voltage reduces U
DcReduce, thus the input variable U of outer voltage controlling unit 91
* Dc-U
DcGreater than zero, so PID controller 121 forward integrations, its output valve i
* dIncrease, then the input variable i of the d shaft current PID controller 122 of current inner loop controlling unit 91
* d-i
dGreater than zero, the output valve L*di of the PID controller 122 of final d shaft current
d/ dt+Ri
dIncrease, because V
* d=e
Sd+ ω Li
q-L*di
d/ dt-Ri
d, V then
* dReduce u
* Ao, u
* BoAnd u
* CoReduce, finally control i
dBe increase trend, wherein e
SdBe the 7 AC side input voltages of the great power bidirectional current transformer under the synchronous rotating frame d coordinate, and realize e through phase-locked loop
SdSynchronous with great power bidirectional current transformer 7 AC side input voltage phases.Because i
dBe active current, i
dIncrease will be to the charging of the support electric capacity of great power bidirectional current transformer DC side, U then
DcIncrease, up to set-point U
* DcTill equating, thereby great power bidirectional current transformer 7 dc voltage U have been realized
DcStable output.
2, under the car brakeing operating mode, great power bidirectional current transformer 7 gets into inversion automatically can present operating mode, absorbs energy by DC side and injects AC side, presses U via the regulating action maintenance direct current net of outer voltage controlling unit circuit
DcConstant, its detailed process is:
Under the car brakeing operating mode, inject energy to the AC side of great power bidirectional current transformer, cause supporting electric capacity (being great power bidirectional current transformer 7 dc bus capacitor C among Fig. 3) charging, direct voltage reduces U
DcRaise, thus the input variable U of outer voltage controlling unit circuit
* Dc-U
DcLess than zero, so PID controller 121 reverse integrals, its output valve i
* dReduce, then the input variable i of the d shaft current PID controller 122 of current inner loop controlling unit 91
* d-i
dLess than zero, the output valve L*di of the PID controller 122 of final d shaft current
d/ dt+Ri
dReduce, because V
* d=e
Sd+ ω Li
q-L*di
d/ dt-R
Id, V then
* dIncrease u
* Ao, u
* BoAnd u
* CoIncrease, finally control i
dBe reduction trend, wherein e
SdBe the 7 AC side input voltages of the great power bidirectional current transformer under the synchronous rotating frame d coordinate, and realize e through phase-locked loop
SdSynchronous with great power bidirectional current transformer 7 AC side input voltage phases.Because i
dBe active current, i
dReduction will be to the support capacitor discharge of great power bidirectional current transformer 7 DC sides, U then
DcIncrease, up to set-point U
* DcTill equating, thereby great power bidirectional current transformer 7 dc voltage U have been realized
DcStable output.
The detailed process of the pwm pulse of data processing module 102 output control great power bidirectional current transformers 7 power device break-makes is following:
The input value of PID controller 121 is U in the outer voltage controlling unit circuit 90
* Dc-U
Dc, its output valve is as the d shaft current set-point i of current inner loop controlling unit circuit 91
* d, the q shaft current set-point i of current inner loop controlling unit circuit 91
* qPerseverance is zero, is 1 with the AC side power factor that guarantees great power bidirectional current transformer 7, the output valve V of current inner loop controlling unit circuit 91 PID controllers 122
* dOutput valve V with PID controller 123
* qThrough generating the set-point u that great power bidirectional current transformer 7 exchanges voltage on valve side (the interchange valve side here is A phase, B phase and the C phase voltage of great power bidirectional current transformer 7 AC side) after the coordinate transform
* Ao, u
* BoAnd u
* Co, u
* Ao, u
* BoAnd u
* CoBe input to pulse generator 8, be preferably the phase-shifting carrier wave pwm pulse generator, generate the pwm pulse signal of control great power bidirectional current transformer 7, thus the break-make of control great power bidirectional current transformer 7 power devices, wherein V
* d=e
Sd+ ω Li
q-L*di
d/ dt-Ri
d, V
* q=e
Sq+ ω Li
d-L*di
q/ dt-Ri
q, e
Sd, e
SqBe respectively the great power bidirectional current transformer 7 AC side input voltages under synchronous rotating frame d, the q coordinate, and realize e through phase-locked loop
Sd, e
SqSynchronous with great power bidirectional current transformer 7 AC side input voltage phases.
Embodiment four
The tractive power supply system Surveillance center equipment composition frame chart that provides for the embodiment of the invention four shown in Figure 7; Surveillance center 102 monitors through wired or wireless mode can present formula traction substation 101 running statuses; The convenient formula traction substation 101 of presenting keeps in repair the generation of prevention major accident.As shown in Figure 7; The Surveillance center 102 that can present formula traction substation 101 in the present embodiment is made up of an industrial computer 13 and a data transmission unit 14; Data transmission unit 14 receives the state parameter of great power bidirectional current transformer 7 through wired or wireless mode, and industrial computer 13 can be connected the communication that realizes between the two through RS232 with data transmission unit 14.Data transmission unit 14 preferred GPRS wireless data transmission unit, GPRS wireless data transmission unit 14 realizes the permanent online data that receive at any time through the state parameter of wireless mode reception great power bidirectional current transformer 7.
In real work; Data transmission unit 14 receives the state parameter that can present great power bidirectional current transformer 7 in the formula traction substation ability feedback formula traction power transformation cabinet 4 through wired or wireless mode; Preferably receive the state parameter that to present great power bidirectional current transformer 7 in the formula traction substation ability feedback formula traction power transformation cabinet 4 through wireless mode; And send industrial computer 13 to through the RS232 interface; Show in real time on industrial computer 13 and store that when certain can present formula traction substation device fails, industrial computer 13 can in time send fault alarm.
Embodiment five
The embodiment of the invention five also provides a kind of electric power system; What comprise that any embodiment of the present invention provides can present the formula traction substation; This can be presented the formula traction substation and can present the positive pole output of formula traction power supply cabinet and link to each other with contact line, and the negative pole that can present formula traction power supply cabinet is exported and linked to each other with rail; Also comprise a Surveillance center, said Surveillance center comprises industrial computer and data transmission unit, and said data transmission unit is used for receiving the said state parameter that can present formula traction substation great power bidirectional current transformer through wired or wireless mode.
In tractive power supply system; What at first solve is exactly the location problem of traction substation, and secondly the influence that it receives orographic condition, running qualities of a wagon curve, the factors such as density of dispatching a car is that the model of each equipment work device in the traction substation is selected; It receives operational environment, whether is easy to the influence of factors such as safeguarding; Be the selection problem of miscellaneous equipment in the tractive power supply system once more, like contact line, whether energy-efficient this fail safe for whole system, reliability and play key effect.
In conjunction with shown in Figure 1; The tractive power supply system total line length is 6 kilometers in the present embodiment; Carry out traction calculation according to circuit orographic condition, running qualities of a wagon curve and the density of dispatching a car; Drawing the circuit maximum power point is two places, and this position, two places possesses the primary condition of building traction substation, then two traction substations is built in this two place.Build at the maximum power point place and can present the formula traction substation, can not only improve transport power, energy savings, can also prolong power supply zone, minimizing can be presented formula traction substation quantity, practices thrift investment, has energy-efficient distinguishing feature.Be the design that realizes to present the formula traction substation in the present embodiment; In the selection of device model, need to satisfy the operational environment that to present the formula traction substation; Like voltage and power; The device that satisfies this environment has a variety of, in conjunction with shown in Figure 2, below will specify the preferred version that present embodiment can be presented formula traction substation 101 each device:
In the present embodiment, the traction substation design capacity is 1MW, and the contact line rated voltage is 750V, and the interchange primary voltage of traction substation is 10kv.
Wherein, can present formula traction power supply cabinet 4 and be made up of two great power bidirectional current transformers 7, the specified input voltage of great power bidirectional current transformer 7 is 500V, and the direct current rated output voltage is 750V, and rated power is 500kW; Great power bidirectional current transformer 7 power devices are selected the IGBT power model of 2400A/1700V for use; Great power bidirectional current transformer 7 AC side inductance L values are preferably 350uH, and dc bus capacitor C preferably adopts the electrochemical capacitor of 6800uH/400V.
Correspondingly, rectification converter cabinet 2 multi winding transformers are three-winding transformer, preferred three winding poured with epoxy resin dry-type transformers, and transformer rated capacity: 1250kVA, no-load voltage ratio is 10000V/500V/500V, nominal operation frequency: 50Hz; The structure of three-winding transformer is the axial split formula, has guaranteed secondary winding no-load voltage ratio degree of unbalance less than 0.5%, and the impedance unbalance degree is less than 1%; The class of insulation is a F level or more than the F level; Insulation level is LI75AC35/LI0AC5; Efficient is greater than 98%; No-load current is less than 0.5% times of rated current; Noise level: unloaded time≤55dB, during rated load≤60dB; Carry temperature controller; Monitor the three-winding transformer temperature in real time; Temperature is controlled in the preset value scope, when being raised to the overload alarm temperature spot of setting, starts the overload alarm function; If the three-winding transformer temperature can not be controlled effectively,, the breaking-up that prevents device continues operation for can also stopping device through trip avoidance function.
Correspondingly, the preferred rated voltage of ac high-voltage switch cubicle 1 high-voltage AC breaker Qac is 10kv, and rated current is 72A; Low-voltage alternating-current switch cubicle 3 low-voltage alternating-current circuit breaker Q models preferably are NAI-2000/3, and its rated current is 2000A; Mounting means is a drawer type; 80kA during specified limit short circuit breaking capacity Icu:400V, 50kA during 690V; 50kA during specified operation short circuit breaking capacity Ics:400V, 40kA during 690V; Withstand current Icw:50kA/1sec during specified short circuit; Protective device is an intelligent electrical apparatus release, has performances such as long delay inverse time lag, short time delay inverse time lag, short time delay specified time, wink be moving.
Correspondingly, the preferred model of dc feeder switch cubicle 5 dc circuit breakers is DS16-1500/800, rated operational voltage 800V, rated operational current 1500A, ultimate breaking capacity 100kA, intrinsic operate time 4ms; The preferred GWZ type of dc-isolation switch electric isolating switch in the present embodiment, rated voltage 800V, rated current 1500A, specified short time withstand current 40kA, rated duration of short-circuit 4s, leakage current is less than 0.5mA.
For the miscellaneous equipment in the traction power transformation system,, can select for use Taiwan to grind magnificent PPC-L126T like industrial computer 13; Data transmission unit 14 is selected the GPRS wireless data terminal HF-200D of Sichuan red fox wireless tech Co., Ltd for use, and contact line 103 adopts copper contact wire; Line directly is 200 squares, and resistivity 88.85m/km is 3 meters apart from orbit altitude; Wherein, contact line is decided according to height of car and pantograph height apart from orbit altitude.
What should explain at last is: above each embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although the present invention has been carried out detailed explanation with reference to aforementioned each embodiment; Those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, perhaps to wherein part or all technical characteristic are equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (8)
1. can present the formula traction substation for one kind, it is characterized in that, comprise:
The rectifier transformer cabinet; Be provided with a multi winding transformer in the said rectifier transformer cabinet; Said multi winding transformer has a former limit winding and a plurality of secondary winding; And said a plurality of secondary winding adopts identical connected mode, and the former limit winding of said multi winding transformer is with to exchange medium voltage network continuous;
Can present formula traction power supply cabinet; Said can the feedback is provided with a plurality of great power bidirectional current transformers in the formula traction power supply cabinet; Receive after the anodal parallel connection of said a plurality of great power bidirectional current transformer DC side and can present the anodal output of formula traction power supply cabinet; Receive after the parallel connection of said a plurality of great power bidirectional current transformer DC side negative pole and can present the output of formula traction power supply cabinet negative pole, each secondary winding of said multi winding transformer links to each other with a great power bidirectional AC side of converter respectively.
2. according to claim 1ly can present the formula traction substation, it is characterized in that the power device of said great power bidirectional current transformer is the insulated gate bipolar transistor power model, and said great power bidirectional current transformer adopts the three phase full bridge structure.
3. according to claim 1 and 2ly can present the formula traction substation; It is characterized in that; Also comprise the ac high-voltage switch cubicle, be provided with a high-voltage AC breaker in the said ac high-voltage switch cubicle, the former limit winding of said transformer through said high-voltage AC breaker with to exchange medium voltage network continuous.
4. according to claim 1 and 2ly can present the formula traction substation; It is characterized in that; The said formula traction substation of presenting also comprises the AC low-tension switch cubicle; Be provided with a plurality of low-voltage alternating-current circuit breakers in the said AC low-tension switch cubicle, between the secondary winding of said multi winding transformer and said each great power bidirectional AC side of converter, be connected in series a low-voltage alternating-current circuit breaker respectively.
5. according to claim 1 and 2ly can present the formula traction substation; It is characterized in that; The said formula traction substation of presenting also comprises the dc feeder switch cubicle; Be provided with a dc circuit breaker and a dc-isolation switch in the said dc feeder switch cubicle, said dc-isolation switch and dc circuit breaker are serially connected in respectively on the positive and negative electrode bus of said dc feeder switch cubicle, saidly can present formula traction power supply cabinet DC side output and link to each other with said dc feeder switch cubicle input.
6. according to claim 1ly can present the formula traction substation, it is characterized in that also comprise control device, said control device comprises:
Data input module; Comprise transducer, data conditioning circuit and modulus collecting unit; Said transducer is used for gathering the state parameter that can present formula traction substation great power bidirectional current transformer; Said data conditioning circuit is used for the state parameter that collects is carried out processing and amplifying, and said modulus collecting unit is used for the state parameter after amplifying is carried out analog-to-digital conversion;
Data processing module is used for the state parameter of said data input module collection is carried out computing, accomplishes corresponding control algolithm, produces pwm pulses;
Control module; Be used to receive the pwm pulses signal of data processing module output; And said pulse signal amplified output to said great power bidirectional current transformer again, be used to control the break-make of the insulated gate bipolar transistor of said great power bidirectional current transformer;
Comparison module; Be used for the output signal after the said data conditioning circuit processing and amplifying and the protection threshold value of setting are compared; When surpassing the protection threshold value of setting, export a fault-signal and give said control module, the output of the automatic locking pulse duration-modulated pulse of said control module signal.
7. according to claim 6ly can present the formula traction substation, it is characterized in that:
Said data processing module is the two closed control circuits based on PID control; And comprise current inner loop controlling unit circuit and outer voltage controlling unit circuit; All great power bidirectional current transformer common voltage outer shroud controlling unit circuit, each great power bidirectional current transformer has independently current inner loop controlling unit circuit.
8. an electric power system is characterized in that, comprising:
Claim 1-7 is arbitrary describedly to present the formula traction substation, and the said formula traction substation of presenting can be presented the positive pole output of formula traction power supply cabinet and links to each other with contact line, and the negative pole that can present formula traction power supply cabinet is exported and linked to each other with rail;
Surveillance center, said Surveillance center comprises industrial computer and data transmission unit, said data transmission unit is used for receiving the said state parameter that can present formula traction substation great power bidirectional current transformer through wired or wireless mode.
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| CN 201220142876 CN202633964U (en) | 2012-04-06 | 2012-04-06 | Energy-fed type traction substation and power supply system |
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| CN 201220142876 CN202633964U (en) | 2012-04-06 | 2012-04-06 | Energy-fed type traction substation and power supply system |
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| CN103023405A (en) * | 2013-01-23 | 2013-04-03 | 南京航空航天大学 | Hybrid fuzzy braking method for brushless direct-current motor of electric vehicle |
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| CN103475028A (en) * | 2013-09-24 | 2013-12-25 | 许继集团有限公司 | Brake feedback device control system and method for counter current resistance of power supply system |
| CN104155553A (en) * | 2014-08-13 | 2014-11-19 | 南京南瑞继保电气有限公司 | Locomotive electric power feedback equipment test system and test method |
| CN104333038A (en) * | 2014-11-05 | 2015-02-04 | 株洲时代装备技术有限责任公司 | Method and device for recovering mixed regenerative energy of urban railway power supply system |
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| CN112600097A (en) * | 2020-11-13 | 2021-04-02 | 凯博易控车辆科技(苏州)股份有限公司 | Electrified highway system suitable for multisource heavy truck |
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| CN103475028A (en) * | 2013-09-24 | 2013-12-25 | 许继集团有限公司 | Brake feedback device control system and method for counter current resistance of power supply system |
| CN103475028B (en) * | 2013-09-24 | 2016-10-05 | 许继电气股份有限公司 | Brake feedback device is to the counterflow-preventing control system of electric power system and control method |
| CN104155553A (en) * | 2014-08-13 | 2014-11-19 | 南京南瑞继保电气有限公司 | Locomotive electric power feedback equipment test system and test method |
| CN104155553B (en) * | 2014-08-13 | 2017-01-11 | 南京南瑞继保电气有限公司 | Locomotive electric power feedback equipment test system and test method |
| CN104333038A (en) * | 2014-11-05 | 2015-02-04 | 株洲时代装备技术有限责任公司 | Method and device for recovering mixed regenerative energy of urban railway power supply system |
| CN105914793A (en) * | 2016-06-22 | 2016-08-31 | 国电南京自动化股份有限公司 | Isolation-type dual regenerative braking energy feedback inverter open-phase and derating control method |
| CN107284252A (en) * | 2016-12-20 | 2017-10-24 | 中铁电气化局集团有限公司 | A kind of metro traction power system and 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 |
| CN112600097A (en) * | 2020-11-13 | 2021-04-02 | 凯博易控车辆科技(苏州)股份有限公司 | Electrified highway system suitable for multisource heavy truck |
| CN114421462A (en) * | 2022-01-21 | 2022-04-29 | 西南交通大学 | Stable operation control method of flexible traction power supply system |
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