CN202863182U - Energy feedback type traction power supply device based on series compensation transformer - Google Patents
Energy feedback type traction power supply device based on series compensation transformer Download PDFInfo
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- CN202863182U CN202863182U CN 201220355337 CN201220355337U CN202863182U CN 202863182 U CN202863182 U CN 202863182U CN 201220355337 CN201220355337 CN 201220355337 CN 201220355337 U CN201220355337 U CN 201220355337U CN 202863182 U CN202863182 U CN 202863182U
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- transformer
- traction power
- pwm rectifier
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Abstract
The utility model provides an energy feedback type traction power supply device based on a series compensation transformer, which comprises a phase shifting transformer, a diode rectifier unit and a PWM (Pulse Width Modulation) rectifier unit, and also comprises the series compensation transformer, wherein the quantity of the phase shifting transformer is one; a primary side three-phase winding of the phase shifting transformer is used for being connected with an alternating current power supply; two secondary side three-phase windings of the phase shifting transformer are connected with the alternating current side of the diode rectifier unit; the two secondary side three-phase windings of the phase shifting transformer are also connected with a primary side three-phase winding of the series compensation transformer; secondary side three-phase windings of the series compensation transformer are connected with the alternating current side of the PWM rectifier unit; and the series compensation transformer is used for adjusting the input voltage of the PWM rectifier unit, so as to enable the output voltage of the PWM rectifier unit to be equal to that of the diode rectifier unit. The energy feedback type traction power supply device can reduce the quantity of the phase shifting transformers, lower the cost, and decrease the installation space.
Description
Technical field
The utility model relates to the traction power supply technology of electric locomotive, relate in particular to a kind of have an energy feedback function can present the formula traction power set based on the series compensation voltage transformer.
Background technology
At present, electric locomotive, particularly city railway train generally adopts DC supply, traction power set by substation is train power supply, traction power set adopts 12 or 24 pulse wave diode rectification units to convert the alternating current of AC network to DC Traction Network power supply that direct current (DC) is train, and the VD of existing diode rectification unit is uncontrollable and scope range of the fluctuation of voltage is large; And diode rectification unit energy can only be by AC to the DC side unidirectional transmission, and the braking energy during the train regenerative brake can not the feedback AC network, needs consume excess energy with braking resistor, causes the waste of the energy.
Application number is 200810103678.7 Chinese patent literature, a kind of mixed traction power supply equipment and control method are disclosed, adopt pulse width modulation (Pulse Width Modulation, abbreviation PWM) rectifier unit is in parallel with the diode rectification unit, take full advantage of the diode rectification unit simple and reliable, overload capacity is strong, and PWM rectifier unit energy in bidirectional flow, the advantage that power factor is adjustable, can improve the direct current network voltage stability, improve power supply quality, simultaneously also can realize train braking energy feedback AC network, avoid braking energy to consume in braking resistor, conserve energy.
But, in the technique scheme, if the diode rectification unit is identical with the alternating-current voltage/AC voltage of PWM rectifier unit input, then the vdc of the DirectCurrent Voltage Ratio diode rectification unit output of PWM rectifier unit output is large, need to configure respectively different phase shifting transformers with the PWM rectifier unit to the diode rectification unit, thereby equipment cost is higher, and the voltage class of phase shifting transformer is larger, volume is larger, need to take very large installing space.
The utility model content
The utility model provide a kind of based on the series compensation voltage transformer can present the formula traction power set, can present the formula traction power set in the prior art and need to configure a plurality of phase shifting transformers, the technological deficiency that equipment cost is high and installing space is large to solve.
The utility model provide a kind of based on the series compensation voltage transformer can present the formula traction power set, comprise phase shifting transformer, diode rectification unit and PWM rectifier unit, this can be presented the formula traction power set and also comprise the series compensation voltage transformer; The quantity of described phase shifting transformer is one;
Former limit three phase windings of described phase shifting transformer are used for being connected with source of AC, two secondary three phase windings of described phase shifting transformer are connected with the AC of described diode rectification unit, two secondary three phase windings of described phase shifting transformer also are connected with former limit three phase windings of described series compensation voltage transformer, secondary three phase windings of described series compensation voltage transformer are connected with the AC of described PWM rectifier unit, described series compensation voltage transformer is used for adjusting the input voltage of described PWM rectifier unit, so that described PWM rectifier unit equates with the output voltage of diode rectification unit.
Aforesaidly can present the formula traction power set, preferably, former limit three phase windings of described phase shifting transformer are that triangle connects, and two secondary three phase windings of described phase shifting transformer are respectively triangle and connect and star connection.
Aforesaidly can present the formula traction power set, preferably, former limit three phase windings of described series compensation voltage transformer are star connection;
Secondary three phase windings of described series compensation voltage transformer are independent winding, the Same Name of Ends of these secondary three phase windings is connected with former limit three phase windings of described series compensation voltage transformer, the non-same polarity of these secondary three phase windings and the AC downlink connection of described PWM rectifier unit;
Another secondary three phase windings of described series compensation voltage transformer are that triangle connects, and are used for providing the tertiary current loop.
Aforesaidly can present the formula traction power set, preferably, described diode rectification unit comprises the diode rectifier of two parallel connections and is connected with two secondary three phase windings of described phase shifting transformer respectively.
Aforesaidly can present the formula traction power set, preferably, described diode rectifier comprises three groups of diode rectification unit;
Every group of diode rectification unit comprises the diode of two series connection;
The mid point of every group of diode rectification unit is connected with the ac bus of AC, and the positive pole of every group of diode rectification unit is connected with the dc bus of DC side with negative pole.
Aforesaidly can present the formula traction power set, preferably, described diode comprises that the diode of a plurality of parallel connections and each diode are in series with fuse.
Aforesaidly can present the formula traction power set, preferably, described PWM rectifier unit comprises the PWM rectifier of two parallel connections, and each PWM rectifier unit is connected with secondary three phase windings of a series compensation voltage transformer.
Aforesaidly can present the formula traction power set, preferably, described PWM rectifier comprises three groups of power devices; Every group of power device comprises the power model of two series connection;
The mid point of every group of power device is connected with the ac bus of AC, and the positive pole of every group of power device is connected with the dc bus of DC side with negative pole.
Aforesaidly can present the formula traction power set, preferably, described PWM rectifier also comprises ac filter electric capacity and ac filter inductance;
Described ac filter Capacitance parallel connection is on the ac bus of AC, and described ac filter inductance is connected respectively on the ac bus of AC.
Aforesaidly can present the formula traction power set, preferably, described PWM rectifier also comprises DC support electric capacity and dc fuse; Described DC support Capacitance parallel connection is on the dc bus of DC side, and described dc fuse is connected on the dc bus of DC side.
Aforesaidly can present the formula traction power set, preferably, the described formula traction power set of presenting also comprises the LC filter, and described LC filter and described diode rectification unit are connected dc output end and are connected with the PWM rectifier unit.
What the utility model provided can present the formula traction power set based on the series compensation voltage transformer, realize that by the series compensation voltage transformer diode rectification unit and PWM rectifier unit share a phase shifting transformer, can reduce the quantity of phase shifting transformer, reduction can be presented the cost of formula traction power set, and because the voltage class of series compensation voltage transformer is very little, thereby can reduce the installing space of voltage transformer.
Description of drawings
The schematic diagram that can present the formula traction power set based on the series compensation voltage transformer that Fig. 1 provides for the utility model embodiment;
The schematic diagram of the phase shifting transformer that Fig. 2 provides for the utility model embodiment;
The schematic diagram of the series compensation voltage transformer that Fig. 3 provides for the utility model embodiment;
The power circuit schematic diagram of the diode rectifier that Fig. 4 provides for the utility model embodiment;
The power circuit schematic diagram of the PWM rectifier that Fig. 5 provides for the utility model embodiment;
The control block diagram that can present the formula traction power set based on the series compensation voltage transformer that Fig. 6 provides for the utility model embodiment;
The control block diagram of the PWM rectifier that Fig. 7 provides for the utility model embodiment;
The current loop control block diagram that Fig. 8 provides for the utility model embodiment.
The specific embodiment
The schematic diagram that can present the formula traction power set based on the series compensation voltage transformer that Fig. 1 provides for the utility model embodiment.As shown in Figure 1, the present embodiment provide based on the series compensation voltage transformer can present the formula traction power set, comprise phase shifting transformer 1, diode rectification unit 2, PWM rectifier unit 3 and series compensation voltage transformer 4.
The quantity of phase shifting transformer 1 is one, former limit three phase windings of phase shifting transformer 1 are used for being connected with source of AC, this source of AC can be the three plase alternating current net, and two secondary three phase windings of phase shifting transformer 1 are connected with the AC of diode rectification unit 2 respectively.Two secondary three phase windings of phase shifting transformer 1 also are connected with former limit three phase windings of series compensation voltage transformer 4, secondary three phase windings of series compensation voltage transformer 4 are connected with the AC of PWM rectifier unit 3, series compensation voltage transformer 4 is used for adjusting the input voltage of PWM rectifier unit 3, so that PWM rectifier unit 3 equates with the output voltage of diode rectification unit 2.
During train braking, the braking energy of train feeds back to series compensation voltage transformer 4 through PWM rectifier unit 3, feeds back to AC network by phase shifting transformer 1 again.
What the present embodiment provided can present the formula traction power set based on the series compensation voltage transformer, realize that by series compensation voltage transformer 4 diode rectifier 2 and PWM rectifier unit 3 share a phase shifting transformer 1, can reduce the quantity of phase shifting transformer 1, reduction can be presented the cost of formula traction power set, and because the voltage class of series compensation voltage transformer 4 is very little, thereby can reduce installing space.
On the basis of above-described embodiment, should also comprise LC filter Ld, LC(inductor-capacitor based on the formula traction power set of presenting of series compensation voltage transformer) filter Ld is connected with the dc output end that diode rectification unit 2 is connected with the PWM rectifier unit.LC filter Ld can carry out filtering to the vdc of diode rectification unit 2 and 3 outputs of PWM rectifier unit.
The schematic diagram of the phase shifting transformer that Fig. 2 provides for the utility model embodiment.As shown in Figure 2, further, phase shifting transformer 1 can be three-phase phase shifting phase shifting transformer, the dry type phase shifting transformer that this three-phase phase shifting phase shifting transformer is poured with epoxy resin.
Further, diode rectification unit 2 comprises the diode rectifier of two parallel connections and is connected with two secondary three phase windings of phase shifting transformer 1 respectively.
The schematic diagram of the series compensation voltage transformer that Fig. 3 provides for the utility model embodiment.As shown in Figure 3, former limit three phase windings of series compensation voltage transformer 4 are star connection.
Secondary three phase windings of series compensation voltage transformer 4 are independent winding, the Same Name of Ends of these secondary three phase windings (A1, B1, C1) is connected with the Same Name of Ends (A, B, C) of former limit three phase windings of series compensation voltage transformer 4 respectively, the AC downlink connection of the non-same polarity of these secondary three phase windings (A2, B2, C2) and PWM rectifier unit 3;
Another secondary three phase windings of series compensation voltage transformer 4 are that triangle connects, and being used for provides the tertiary current loop, and particularly, the terminal of these secondary three phase windings connects from beginning to end.
The above-mentioned winding connection of series compensation voltage transformer 4, the voltage of former limit three phase windings is connected with the voltage reversal of secondary three phase windings, can realize the reverse counteracting to former limit three-phase winding voltage, realize reducing the voltage of former limit three phase windings, and it is exported to PWM rectifier unit 3 by secondary non-same polarity terminal.
The power circuit schematic diagram of the diode rectifier that Fig. 4 provides for the utility model embodiment.As shown in Figure 4, wherein, a diode rectifier comprises three groups of diode rectification unit, three groups of diode rectification cell formation three-phase bridge rectifier circuits.Every group of diode rectification unit comprises the diode of two series connection, and each diode rectifier has six diodes (D1 ~ D6).
The mid point of every group of diode rectification unit is connected with the ac bus of AC, and the positive pole of every group of diode rectification unit is connected with the dc bus of DC side with negative pole.Each diode can comprise that the diode of a plurality of parallel connections and each diode are in series with fuse, can improve capacity and the reliability of diode rectification unit 2.
The power circuit schematic diagram of the PWM rectifier that Fig. 5 provides for the utility model embodiment; As shown in Figure 5, further, PWM rectifier unit 3 comprises the PWM rectifier of two parallel connections and is connected with two secondary three phase windings of phase shifting transformer 1 respectively.Each PWM rectifier comprises three groups of power devices; Every group of power device comprises the power model of two series connection, and each PWM rectifier has six power models (T1 ~ T6).The mid point of every group of power device is connected with the ac bus of AC, and the positive pole of every group of power device is connected with the dc bus of DC side with negative pole.
Power device can be insulated gate bipolar transistor (the Insulated Gate Bipolar Transistor of semibridge system; be called for short IGBT) power model; the IGBT power model has the functions such as driving, protection and current measurement; adopt the IGBT power model can simplify the system architecture that can present the formula traction power set, raising can be presented the reliability of formula traction power set.
Each PWM rectifier also comprises the ac filter capacitor C
fWith the ac filter inductance L; The ac filter capacitor C
FQuantity be three, three ac filter capacitor C
fBe connected in parallel on the ac bus of AC.The quantity of ac filter inductance L is three, is connected on respectively on the three-phase alternating current bus of AC.The ac filter capacitor C
fThree-phase secondary winding self leakage inductance L with ac filter inductance L and phase shifting transformer 1
kLCL (inductor-capacitor-inductance) mode filter can be consisted of, thereby the harmonic current that PWM rectifier unit 3 is injected AC network can be reduced.
Each PWM rectifier also comprises DC support capacitor C d and dc fuse F; DC support capacitor C d is connected in parallel on the dc bus of DC side, and dc fuse F is connected on the dc bus of DC side.DC support capacitor C d can adopt thin-film capacitor, and the ripple current carrying capacity of this DC support capacitor C d is strong, and equivalent impedance is little, and the life-span is long.Dc fuse F is used for exporting the protection that realizes when being short-circuited the power circuit of PWM rectifier at direct current.
The below specifies the control principle that can present the formula traction power set and the process based on the series compensation voltage transformer that above-described embodiment provides:
Above-described embodiment provide based on the series compensation voltage transformer can present the formula traction power set, can adopt control unit that PWM rectifier unit 3 is controlled.Particularly, the control block diagram that can present the formula traction power set based on the series compensation voltage transformer that provides for the utility model embodiment of Fig. 6.As shown in Figure 6, the diode rectifier dc voltage v of two parallel connections
Dc1Export the active current command value I of all PWM rectifiers through closed loop control
d *, the process sharing control obtains the active current command value I of two PWM rectifiers afterwards
D1 *, I
D2 *
Can pass through the given idle instruction current I of control unit
Q1 *, I
Q2 *The former limit winding electric kinetic potential e of phase shifting transformer 1
a, e
bAnd e
cProcess phaselocked loop (Phase Locked Loop is called for short PLL) and dq coordinate transform obtain the phase angle theta of every group of secondary electro-motive force of phase shifting transformer 1
1, θ
2Reach the value E of electro-motive force under the rotating coordinate system
dThe common received current ring of the alternating current of the alternating current of above-mentioned physical quantity and each diode rectifier, PWM rectifier (I_loop1, I_loo2) is through the switching pulse g1 ~ g6 of computing output control PWM rectifier.
The control block diagram of the PWM rectifier that Fig. 7 provides for the utility model embodiment.As shown in Figure 7, this control method comprises direct current (DC) pressure ring and alternating current ring.The input of direct current (DC) pressure ring comprises the command value V of vdc
Dc *, diode rectification unit 2 output vdc V
Dc1And DC current I
Dc1, PWM rectifier unit 3 output vdc V
Dc2And DC current I
Dc2
The direct current (DC) pressure ring is output as the meritorious instruction current I of diode rectification unit 2
D1 *Meritorious instruction current I with PWM rectifier unit 3
D2 *
The input of alternating current ring includes the meritorious instruction current I of diode rectification unit 2
D1 *, net side electro-motive force E
d, idle instruction current I
Q1 *, the electrical network phase angle theta
1, diode rectifier electric current I
A1, I
B1And I
C1, PWM rectifier current I
A1, I
B1And I
C1
The alternating current ring is output as the drive pulse g1 ~ g6 of control PWM rectifier.
The current loop control block diagram that Fig. 8 provides for the utility model embodiment.As shown in Figure 8, take a diode rectifier as example, the secondary phase angle theta of phase shifting transformer 1
1, rotating vector amplitude E
d, active current command value I
D1 *With idle instruction current I
Q1 *, diode rectifier alternating current I
A1, I
B1And I
C1, PWM rectifier alternating current I
A1, I
B1And I
C1Through computing, can eliminate the interference of electrical network electro-motive force and diode rectifier, can obtain the instruction output voltage of PWM rectifier, and then the drive pulse g1 ~ g6 by the controlled PWM rectifier of space vector pulse width modulation (Space Vector Pulse Width Modulation, be called for short SVPWM).
What the utility model above-described embodiment provided can present the formula traction power set based on the series compensation voltage transformer, realize that by series compensation voltage transformer 4 diode rectifier 2 and PWM rectifier unit 3 share a phase shifting transformer 1, can reduce the quantity of phase shifting transformer 1, reduction can be presented the cost of formula traction power set, and because the voltage class of series compensation voltage transformer 4 is very little, thereby can reduce installing space.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each embodiment of the method can be finished by the relevant hardware of programmed instruction.Aforesaid program can be stored in the microcomputer control unit.This program is carried out the step that comprises above-mentioned each embodiment of the method when carrying out; And aforesaid microcomputer control unit comprises: digital processing chip, micro controller system etc.
It should be noted that at last: above each embodiment is not intended to limit only in order to the technical solution of the utility model to be described; Although with reference to aforementioned each embodiment the utility model is had been described in detail, 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 puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of each embodiment technical scheme of the utility model.
Claims (11)
- One kind based on the series compensation voltage transformer can present the formula traction power set, comprise phase shifting transformer, diode rectification unit and PWM rectifier unit, it is characterized in that, this can be presented the formula traction power set and also comprise the series compensation voltage transformer; The quantity of described phase shifting transformer is one;Former limit three phase windings of described phase shifting transformer are used for being connected with source of AC, two secondary three phase windings of described phase shifting transformer are connected with the AC of described diode rectification unit, two secondary three phase windings of described phase shifting transformer also are connected with former limit three phase windings of described series compensation voltage transformer, secondary three phase windings of described series compensation voltage transformer are connected with the AC of described PWM rectifier unit, described series compensation voltage transformer is used for adjusting the input voltage of described PWM rectifier unit, so that described PWM rectifier unit equates with the output voltage of diode rectification unit.
- 2. according to claim 1ly can present the formula traction power set, it is characterized in that, former limit three phase windings of described phase shifting transformer are that triangle connects, and two secondary three phase windings of described phase shifting transformer are respectively triangle and connect and star connection.
- 3. according to claim 1 and 2ly can present the formula traction power set, it is characterized in that, former limit three phase windings of described series compensation voltage transformer are star connection;Secondary three phase windings of described series compensation voltage transformer are independent winding, the Same Name of Ends of these secondary three phase windings is connected with former limit three phase windings of described series compensation voltage transformer, the non-same polarity of these secondary three phase windings and the AC downlink connection of described PWM rectifier unit;Another secondary three phase windings of described series compensation voltage transformer are that triangle connects, and are used for providing the tertiary current loop.
- 4. according to claim 1 and 2ly can present the formula traction power set, it is characterized in that, described diode rectification unit comprises the diode rectifier of two parallel connections and is connected with two secondary three phase windings of described phase shifting transformer respectively.
- 5. according to claim 4ly can present the formula traction power set, it is characterized in that, described diode rectifier comprises three groups of diode rectification unit;Every group of diode rectification unit comprises the diode of two series connection;The mid point of every group of diode rectification unit is connected with the ac bus of AC, and the positive pole of every group of diode rectification unit is connected with the dc bus of DC side with negative pole.
- 6. according to claim 5ly can present the formula traction power set, it is characterized in that, described diode comprises that the diode of a plurality of parallel connections and each diode are in series with fuse.
- 7. according to claim 1 and 2ly can present the formula traction power set, it is characterized in that, described PWM rectifier unit comprises the PWM rectifier of two parallel connections, and each PWM rectifier unit is connected with secondary three phase windings of a series compensation voltage transformer.
- 8. according to claim 7ly can present the formula traction power set, it is characterized in that, described PWM rectifier comprises three groups of power devices; Every group of power device comprises the power model of two series connection;The mid point of every group of power device is connected with the ac bus of AC, and the positive pole of every group of power device is connected with the dc bus of DC side with negative pole.
- 9. according to claim 8ly can present the formula traction power set, it is characterized in that, described PWM rectifier also comprises ac filter electric capacity and ac filter inductance;Described ac filter Capacitance parallel connection is on the ac bus of AC, and described ac filter inductance is connected respectively on the ac bus of AC.
- 10. according to claim 8ly can present the formula traction power set, it is characterized in that, described PWM rectifier also comprises DC support electric capacity and dc fuse; Described DC support Capacitance parallel connection is on the dc bus of DC side, and described dc fuse is connected on the dc bus of DC side.
- 11. according to claim 1 and 2ly can present the formula traction power set, it is characterized in that, the described formula traction power set of presenting also comprises the LC filter, described LC filter and described diode rectification unit are connected dc output end and are connected with the PWM rectifier unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220355337 CN202863182U (en) | 2012-07-20 | 2012-07-20 | Energy feedback type traction power supply device based on series compensation transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220355337 CN202863182U (en) | 2012-07-20 | 2012-07-20 | Energy feedback type traction power supply device based on series compensation transformer |
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| Publication Number | Publication Date |
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| CN202863182U true CN202863182U (en) | 2013-04-10 |
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| CN 201220355337 Withdrawn - After Issue CN202863182U (en) | 2012-07-20 | 2012-07-20 | Energy feedback type traction power supply device based on series compensation transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102774294A (en) * | 2012-07-20 | 2012-11-14 | 北京千驷驭电气有限公司 | Energy feedback type traction power supply device based on series compensation transformer |
-
2012
- 2012-07-20 CN CN 201220355337 patent/CN202863182U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102774294A (en) * | 2012-07-20 | 2012-11-14 | 北京千驷驭电气有限公司 | Energy feedback type traction power supply device based on series compensation transformer |
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Granted publication date: 20130410 Effective date of abandoning: 20141126 |
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