CN209709935U - The preliminary filling electrical circuit of traction convertor - Google Patents

The preliminary filling electrical circuit of traction convertor Download PDF

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Publication number
CN209709935U
CN209709935U CN201920451363.5U CN201920451363U CN209709935U CN 209709935 U CN209709935 U CN 209709935U CN 201920451363 U CN201920451363 U CN 201920451363U CN 209709935 U CN209709935 U CN 209709935U
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charge
weight
circuit
traction convertor
contactor
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张春磊
吴强
杜广群
杨志浩
潘景宇
汪志
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CRRC Qingdao Sifang Rolling Stock Research Institute Co Ltd
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CRRC Qingdao Sifang Rolling Stock Research Institute Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The utility model relates to a kind of preliminary filling electrical circuits of traction convertor, including the first weight pre-charge circuit and the second heavy pre-charge circuit being connect respectively with the secondary side winding of tractive transformer, the first weight four-quadrant rectifier module being connected in series with the first weight pre-charge circuit and the second heavy four-quadrant rectifier module being connected in series with the second weight pre-charge circuit, the output end of the first weight four-quadrant rectifier module is connect with the first intermediate dc Support Capacitor FC11 of middle dc voltage loop input, the output end of the second weight four-quadrant rectification module is connect with the second intermediate dc Support Capacitor FC12 of middle dc voltage loop input.The utility model is equipped with double pre-charge circuit, double four-quadrant rectifier module is set to share the bus in a middle dc voltage circuit simultaneously, traction convertor is set to have the hardware condition of substance four quadrant running, the power availability of traction convertor is improved, strong robustness.

Description

The preliminary filling electrical circuit of traction convertor
Technical field
The utility model belongs to rail vehicle traction current transformation technical field, is related to the precharge of rail vehicle traction convertor Technology, specifically, being related to a kind of preliminary filling electrical circuit of traction convertor.
Background technique
Traction convertor bosom DC link is equipped with bulky capacitor, if without restriction to capacitance charging current, capacitor exists The energization initial stage can generate bigger charging current.Excessive electric current is likely to result in the damage or destruction of device.Therefore, Traction convertor generallys use a set of pre-charge circuit, when traction convertor is pre-charged, first with contactor by pre-charge resistance Charge circuit is accessed, charging current is limited in a controllable, reasonable range, after charging, then by pre-charge resistance Isolation.
Short volume (being typically 4 volumes) intercity EMU serves adjacent cities group, has start-stop speed fast, density of dispatching a car is adjustable The features such as property is big, and classification type is flexible and changeable.But since short volume EMU power car is less, the loss pair of vehicle power The influence that train operation generates is more serious.It is influenced to mitigate failure, the short intercity EMU of volume can pass through substance four-quadrant Rectifier works independently, and mode that single inverter works independently realizes that power maximally utilizes.
Existing traction convertor preliminary filling electrical circuit, relatively conventional is a set of pre-charge circuit of design, referring to Fig. 1, two Weight four-quadrant rectifier module DC side shares intermediate dc bus.This design breaks down in single four-quadrant reorganizer module When, whole power of failure traction convertor can be lost, do not have the independently operated condition of substance four-quadrant rectifier module.
In addition, devising two sets of pre-charge circuits, referring to fig. 2, every set is pre- there are also a kind of traction convertor preliminary filling electrical circuit Charging circuit constitutes tractive power supply system after respectively connecting four-quadrant rectifier module, and two traction power supply loop circuit structures are complete As complete and work independently from each other.This design is more using number of devices, and failure rate is big, and robustness is poor, when traction convertor After pre-charge circuit or intermediate DC link break down, the power loss of traction convertor influences bigger.
Utility model content
The utility model is provided for the above problems such as poor robustness, power loss existing for existing traction convertor be big A kind of preliminary filling electrical circuit of the small traction convertor of strong robustness, power loss.
In order to achieve the above object, the utility model provides a kind of preliminary filling electrical circuit of traction convertor, including respectively The the first weight pre-charge circuit and the second weight pre-charge circuit that are connect with the secondary side winding of tractive transformer and first weight The the first weight four-quadrant rectifier module and be connected in series with the second weight pre-charge circuit that pre-charge circuit is connected in series The second heavy four-quadrant rectifier module, the output end of the first heavy four-quadrant rectifier module and middle dc voltage circuit First intermediate dc Support Capacitor FC11 connection of input terminal, the output end of the second heavy four-quadrant rectifier module and centre Second intermediate dc Support Capacitor FC12 connection of DC voltage loop input.
Further, the secondary side of the input terminal Yu the tractive transformer of the described first heavy four-quadrant rectifier module around The first current sensor is connected between group；The input terminal and the tractive transformer of the second heavy four-quadrant rectifier module Secondary side winding between be connected with the second current sensor.
Preferably, the first weight pre-charge circuit includes main contactor K1, pre-charge contactor AK1 and pre-charge resistance R11, pre-charge contactor AK1 and pre-charge resistance R11 are connected in parallel after being connected in series with the main contactor K1.
Preferably, second pre-charge circuit includes main contactor K2, pre-charge contactor AK2 and pre-charge resistance R12, pre-charge contactor AK2 and pre-charge resistance R12 are connected in parallel after being connected in series with the main contactor K2.
Preferably, the output end of the first weight four-quadrant rectifier module and the second heavy four-quadrant rectifier module Output end the connection of main track and negative wire is realized by busbar respectively, share middle dc voltage circuit bus.
Compared with prior art, it the advantages of the utility model and has the active effect that
(1) the preliminary filling electrical circuit of traction convertor provided by the utility model, design have double pre-charge circuit, make simultaneously Double four-quadrant rectifier module shares the bus in a middle dc voltage circuit, and traction convertor is made to have substance four-quadrant The power availability of the hardware condition of operation, traction convertor is improved, strong robustness, and intermediate dc Support Capacitor capacity declines Subtract and traction convertor work influence is reduced；Circuit is more succinct, saves cost, and failure rate reduces.
(2) the preliminary filling electrical circuit of traction convertor provided by the utility model, double pre-charge circuit circuit structure are complete It is identical, not only played the role of mutual redundancy, but also cooperate with double four-quadrant rectifier module, and had realized that substance four-quadrant was independently transported Row not only may be implemented to be switched to substance four quadrant running when breaking down in operation, but also can shut down in traction converter failure Substance four-quadrant starts afterwards.
Detailed description of the invention
Fig. 1-2 is the precharge loop structure schematic diagram of existing traction convertor；
Fig. 3 is the precharge loop structure schematic diagram of the utility model traction convertor；
Fig. 4 is the precharge loop circuit schematic diagram of the utility model embodiment traction convertor；
Fig. 5 is the flow chart of the precharge control method of the utility model embodiment traction convertor；
Fig. 6-7 is the flow chart of principal and subordinate's preliminary filling electric control processing method of the utility model embodiment traction convertor；
Fig. 8 is that the pre-charge resistance of the utility model embodiment traction convertor accumulates the calculation method flow chart of heat.
In figure, 1, tractive transformer, the 2, first pre-charge circuit, the 3, second pre-charge circuit, 4, first weight four-quadrant it is whole Stream device module, the 5, second heavy four-quadrant rectifier module, 6, middle dc voltage circuit, the 7, first current sensor, 8, second Current sensor, K1-K2, main contactor, AK1-AK2, pre-charge contactor, R11-R12, pre-charge resistance, FC11-FC12, Intermediate dc Support Capacitor.
Specific embodiment
In the following, the utility model is specifically described by illustrative embodiment.It should be appreciated, however, that not having In the case where being further discussed below, element, structure and features in an embodiment can also be advantageously incorporated into other implementations In mode.
In the description of the present invention, it should be noted that term " first ", " second " are used for description purposes only, and It cannot be understood as indicating or implying relative importance.
Referring to Fig. 3, Fig. 4, an embodiment of the present invention provides a kind of preliminary filling electrical circuit of traction convertor, including divides The the first weight pre-charge circuit 2 and the second weight pre-charge circuit 3 that are not connect with the secondary side winding of tractive transformer 1, with it is described First weight pre-charge circuit 2 be connected in series the first weight four-quadrant rectifier module 4 and with the second weight pre-charge circuit 3 The second weight four-quadrant rectifier module 5 being connected in series, the output end of the first weight four-quadrant rectifier module 4 and centre are straight The first intermediate dc Support Capacitor FC11 connection of 6 input terminal of voltage circuit is flowed, the second weight four-quadrant rectifier module 5 Output end is connect with the second intermediate dc Support Capacitor FC12 of 6 input terminal of middle dc voltage circuit.
With continued reference to Fig. 4, in order to realize the precharge by the first weight four-quadrant rectifier module 4, as above-mentioned preliminary filling One preferred design of electrical circuit, first pre-charge circuit 2 include main contactor K1, pre-charge contactor AK1 and precharge Resistance R11, pre-charge contactor AK1 and pre-charge resistance R11 are connected in parallel after being connected in series with the main contactor K1.When leading Draw current transformer and detects that network pressure normally and after traction convertor fault-free, waits driver to be closed main circuit breaker VCB, traction convertor After detecting main circuit breaker VCB closure, pre-charge process, pre-charge contactor AK1 closure are initially entered, middle dc voltage returns Under pre-charge resistance R11 current limliting, the uncontrollable rectifier through the first weight four-quadrant reorganizer module 4, voltage starts to increase on road 6, when After the voltage in middle dc voltage circuit 6 rises to the secondary side winding crest voltage of 0.85 times of tractive transformer, main contactor K1 or/and K2 closure, pre-charge contactor AK1 are opened, and precharge is completed, the first weight four-quadrant rectifier module 4 or/and second Weight four-quadrant rectifier starts to start work, establishes and stablizes middle dc voltage.
With continued reference to Fig. 4, in order to realize the precharge by the second weight four-quadrant rectifier module 5, as above-mentioned preliminary filling One preferred design of electrical circuit, second pre-charge circuit 3 include main contactor K2, pre-charge contactor AK2 and precharge Resistance R12, pre-charge contactor AK2 and pre-charge resistance R12 are connected in parallel after being connected in series with the main contactor K2.When leading Draw current transformer and detects that network pressure normally and after traction convertor fault-free, waits driver to be closed main circuit breaker VCB, traction convertor After detecting main circuit breaker VCB closure, pre-charge process, pre-charge contactor AK2 closure are initially entered, middle dc voltage returns Under pre-charge resistance R12 current limliting, the uncontrollable rectifier through the second weight four-quadrant reorganizer module 5, voltage starts to increase on road 6, when After the voltage in middle dc voltage circuit 6 rises to the secondary side winding crest voltage of 0.85 times of tractive transformer, main contactor K2 or/and K1 closure, pre-charge contactor AK2 are opened, and precharge is completed, the second weight four-quadrant rectifier module 5 or/and first Weight four-quadrant rectifier 4 starts to start work, establishes and stablizes middle dc voltage.
With continued reference to Fig. 3, Fig. 4, as the further design of above-mentioned preliminary filling electrical circuit, the first heavy four-quadrant rectifier The first current sensor 7 is connected between the input terminal of module 4 and the secondary side winding of the tractive transformer 1；Described second The second electric current biography is connected between the input terminal of weight four-quadrant rectifier module 5 and the secondary side winding of the tractive transformer 1 Sensor 8.First current sensor 7 and the second current sensor 8 are used for the output voltage of the first, second four-quadrant rectifier module The input overcurrent protection of control and the first, second four-quadrant rectifier module.
As a preferred design of above-mentioned preliminary filling electrical circuit, the output end of the first heavy four-quadrant rectifier module and institute The output end for stating the second heavy four-quadrant rectifier module realizes the connection of main track and negative wire by busbar respectively, shares intermediate dc Voltage circuit bus makes traction convertor have the condition of substance four-quadrant rectifier module operation.
When above-mentioned precharge loop works, when driver be closed vehicle main circuit breaker VCB after, pre-charge contactor AK1 or Pre-charge contactor AK2 closure, Secondary Side of Traction Transformer winding alternating voltage pass through pre-charge resistance R11 or pre-charge resistance R12 is that intermediate dc Support Capacitor FC11 and FC12 charges, and middle dc voltage starts to increase, pre-charge resistance R11 or preliminary filling Resistance R12 plays the role of limiting electric current, prevents charging current excessive, damages device, especially intermediate dc Support Capacitor The service life of FC11, FC12.When the voltage in middle dc voltage circuit rises to the secondary side winding peak of 0.85 times of tractive transformer After threshold voltage, pre-charge resistance R11 or pre-charge resistance R12 is shorted, so by main contactor K1 or/and main contactor K2 closure Afterwards disconnect pre-charge contactor AK1 or pre-charge contactor AK2, precharge complete, the first heavy four-quadrant rectifier module or/and Second heavy four-quadrant rectifier module starts to start work, establishes and stablize the busbar voltage in middle dc voltage circuit.
The preliminary filling electrical circuit of the above-mentioned traction convertor of the utility model devises double pre-charge circuit, while making double four Quadrant rectifier module shares a middle dc voltage circuit, and traction convertor is made to have the condition of substance four quadrant running, Not only it may be implemented to be switched to substance four quadrant running when breaking down in operation, but also can be single after traction converter failure shutdown Weight four-quadrant restarts operation.Double pre-charge circuit is applied to shared intermediate DC link, keeps the power of traction convertor most It is possible to be utilized.So the strong robustness of traction convertor works more stable.
Referring to Fig. 5, the utility model separately provides a kind of precharge control method of traction convertor, contains following step It is rapid:
S1, after traction convertor detects network pressure normal and traction convertor fault-free, traction convertor detection is main disconnected Whether road device VCB is closed；
After S2, traction convertor detect main circuit breaker VCB closure, it is closed pre-charge contactor AK1 or preliminary filling electrical contact Device AK2, initially enters pre-charge process；
S3, middle dc voltage circuit are at pre-charge resistance R11 or pre-charge resistance R12 current limliting, through the first heavy four-quadrant The uncontrollable rectifier of rectifier module or the second heavy four-quadrant rectifier module is limited, voltage starts to increase, and judges middle dc voltage Whether the voltage in circuit is greater than the secondary side winding crest voltage of 0.85 times of tractive transformer；If the electricity in middle dc voltage circuit Pressure is less than or equal to the secondary side winding crest voltage of 0.85 times of tractive transformer, then repeatedly step S3；If middle dc voltage The voltage in circuit is greater than the secondary side winding crest voltage of 0.85 times of tractive transformer, then carries out step S4.
S4, closure main contactor K1 or/and main contactor K2, disconnect pre-charge contactor AK1 or pre-charge contactor AK2, precharge are completed；
S5, the first weight four-quadrant rectifier module or/and the second heavy four-quadrant rectifier module start to start work foundation And stablize middle dc voltage.
The electric fault of pre-charge resistance is often as repeatedly starting in the traction convertor short time or late-class circuit is short Resistance wire scaling loss caused by road.In view of the course of work of pre-charge resistance, accumulating heat parameter becomes the pass of pre-charge resistance One of bond parameter.
As the preferred design of above-mentioned control method, the protection threshold value of pre-charge resistance is set, in pre-charge process, is led to The accumulation heat that software for calculation calculates pre-charge resistance is crossed, after pre-charge contactor is closed and main contactor is not closed, into Enter pre-charge process, pre-charge resistance heat starts to add up；Conversely, pre-charge resistance heat starts to dissipate, pre-charge resistance temperature Degree decline, after pre-charge resistance accumulation heat reaches protection threshold value, stopping is pre-charged, and main circuit breaker VCB is disconnected.
Referring to Fig. 8, as the preferred of above-mentioned control method, the accumulation heat of pre-charge resistance is calculated by software for calculation Method are as follows: when pre-charge contactor closure and main contactor disconnection, capacitance charging current flows through pre-charge resistance, according to traction Transformer primary side network pressure instantaneous value uacWith tractive transformer no-load voltage ratio r, traction convertor secondary side winding instantaneous voltage is obtained uac2, it may be assumed that
uac2=uac/r (1)
Again because only when secondary side instantaneous voltage is greater than middle dc voltage, just having charging current and flowing through precharge Resistance, the at this time heating power of pre-charge resistance are as follows:
In formula, p is the heating power of pre-charge resistance, udcFor middle dc voltage, R is the resistance value of pre-charge resistance；When Secondary side instantaneous voltage is less than middle dc voltage or contactor closure situation is unsatisfactory for the requirement of energy balane, at this point, Pre-charge resistance will do it slow heat dissipation, and pre-charge resistance heat radiation power is actual measured value；
Integral to pre-charge resistance heating power or heat radiation power is the accumulation heat of pre-charge resistance:
Q=∫ pdt (3)
In formula, the accumulation heat of Q pre-charge resistance, t is integration variable.
Preferably, pre-charge resistance heat radiation power is about 300W, but is not limited to 300W in the utility model embodiment, Herein, pre-charge resistance heat radiation power measures obtain according to the actual situation.
In order to mitigate the influence of pre-charge circuit and its corresponding four-quadrant rectifier module failure, traction convertor is improved Reliabilty and availability, as the preferred design of above-mentioned control method, in step S2, traction convertor detects main circuit breaker After VCB closure, pre-charge process is initially entered, using master-slave control method, traction convertor default enables main pre-charge circuit, To the intermediate dc Support Capacitor charging in middle dc voltage circuit, when main pre-charge circuit cannot normally complete precharge, It automatically switches to from pre-charge circuit and charges again to the intermediate dc Support Capacitor in middle dc voltage circuit.Double precharge Circuit uses master-slave control method, and double pre-charge circuit circuit structure is identical, has not only played mutually redundant effect, but also Cooperate with double four-quadrant rectifier module, realizes the independent operating of substance four-quadrant rectifier module.
Referring to Fig. 6, with the first weight pre-charge circuit for main pre-charge circuit, the second weight pre-charge circuit is from precharge electricity Master & slave control handoff procedure in the precharge control method of the utility model traction convertor is illustrated for road.It is specific Steps are as follows:
S21, traction convertor detect that network normally and after main circuit breaker VCB closure, judges middle dc voltage circuit Voltage whether be greater than the secondary side winding crest voltage of 0.85 times of tractive transformer；If the voltage in middle dc voltage circuit is big In the secondary side winding crest voltage of 0.85 times of tractive transformer, then step S28 is carried out；If the voltage in middle dc voltage circuit Less than or equal to the secondary side winding crest voltage of 0.85 times of tractive transformer, then step S22 is carried out.
S22, enabled precharge.
S23, traction convertor, which judge whether there is, forbids the first heavy pre-charge circuit failure to carry out S24 if fault-free, If faulty, step S25 is carried out.
The pre-charge contactor AK1 of S24, closure the first weight pre-charge circuit, start to be pre-charged.
S25, the pre-charge contactor AK1 for disconnecting the first weight pre-charge circuit, while traction convertor judges whether there is taboo Only the second heavy pre-charge circuit failure carries out step S26 if fault-free, if faulty, carries out step S27.
The pre-charge contactor AK2 of S26, closure the second weight pre-charge circuit, start to be pre-charged.
S27, the pre-charge contactor AK2 for disconnecting the second weight pre-charge circuit.
S28, closure main contactor K1 or/and main contactor K2, disconnect pre-charge contactor AK1 or pre-charge contactor AK2, precharge are completed.
Referring to Fig. 7, with the second weight pre-charge circuit for main pre-charge circuit, the first weight pre-charge circuit is from precharge electricity Master & slave control handoff procedure in the precharge control method of the utility model traction convertor is illustrated for road.It is specific Steps are as follows:
S21, traction convertor detect that network normally and after main circuit breaker VCB closure, judges middle dc voltage circuit Voltage whether be greater than the secondary side winding crest voltage of 0.85 times of tractive transformer；If the voltage in middle dc voltage circuit is big In the secondary side winding crest voltage of 0.85 times of tractive transformer, then step S28 is carried out；If the voltage in middle dc voltage circuit Less than or equal to the secondary side winding crest voltage of 0.85 times of tractive transformer, then step S22 is carried out.
S22, enabled precharge.
S23, traction convertor, which judge whether there is, forbids the second heavy pre-charge circuit failure to carry out S24 if fault-free, If faulty, step S25 is carried out.
The pre-charge contactor AK2 of S24, closure the second weight pre-charge circuit, start to be pre-charged.
S25, the pre-charge contactor AK2 for disconnecting the second weight pre-charge circuit, while traction convertor judges whether there is taboo Only the first heavy pre-charge circuit failure carries out step S26 if fault-free, if faulty, carries out step S27.
The pre-charge contactor AK1 of S26, closure the first weight pre-charge circuit, start to be pre-charged.
S27, the pre-charge contactor AK1 for disconnecting the first weight pre-charge circuit.
S28, closure main contactor K1 or/and main contactor K2, disconnect pre-charge contactor AK1 or pre-charge contactor AK2, precharge are completed.
In above-mentioned master & slave control handoff procedure, if double pre-charge circuit bulk charge fail, traction converter failure every From.
The precharge control method of the above-mentioned traction convertor of the utility model, using double pre-charge circuit master & slave control plan Slightly, double pre-charge circuit is mutually redundant, i.e., double pre-charge circuit has the function of redundancy switching, and handoff procedure is automatically complete At can reduce the influence of pre-charge circuit and its corresponding four-quadrant rectifier module failure, that is to say, that preliminary filling can be reduced The influence that electric process failure generates, improves the reliabilty and availability of traction convertor.The preliminary filling of above-mentioned traction convertor is automatically controlled Method processed realizes the overheating protection of pre-charge resistance also by the energy conservation strategy to pre-charge resistance, prevents precharge electricity Cause thermal damage was hindered, provides a kind of new approaches for the protection of pre-charge resistance.
Above-described embodiment is used to explain the utility model, rather than limits the utility model, in the utility model Spirit and scope of protection of the claims in, to any modifications and changes that the utility model is made, it is practical new to both fall within this The protection scope of type.

Claims (5)

1. a kind of preliminary filling electrical circuit of traction convertor, which is characterized in that including respectively with the secondary side winding of tractive transformer The the first weight pre-charge circuit and the second weight pre-charge circuit of connection, first be connected in series with the first weight pre-charge circuit Weight four-quadrant rectifier module and the second heavy four-quadrant rectifier module being connected in series with the second weight pre-charge circuit, The output end of the first weight four-quadrant rectifier module and the first intermediate dc of middle dc voltage loop input support Capacitor FC11 connection, the output end of the second weight four-quadrant rectifier module and the second of middle dc voltage loop input The FC12 connection of intermediate dc Support Capacitor.
2. the preliminary filling electrical circuit of traction convertor as described in claim 1, which is characterized in that the first weight four-quadrant rectification The first current sensor is connected between the input terminal of device module and the secondary side winding of the tractive transformer；Second weight The second current sensor is connected between the input terminal of four-quadrant rectifier module and the secondary side winding of the tractive transformer.
3. the preliminary filling electrical circuit of traction convertor as claimed in claim 1 or 2 again, which is characterized in that described first is pre-charged Circuit includes main contactor K1, pre-charge contactor AK1 and pre-charge resistance R11, pre-charge contactor AK1 and pre-charge resistance R11 is connected in parallel after being connected in series with the main contactor K1.
4. the preliminary filling electrical circuit of traction convertor as claimed in claim 3, which is characterized in that the second heavy pre-charge circuit Including main contactor K2, pre-charge contactor AK2 and pre-charge resistance R12, pre-charge contactor AK2 and pre-charge resistance R12 It is connected in parallel after series connection with the main contactor K2.
5. the preliminary filling electrical circuit of traction convertor as claimed in claim 4, which is characterized in that the first weight four-quadrant rectification The output end of device module and the output end of the second heavy four-quadrant rectifier module pass through busbar and realize main track and negative wire respectively Connection, share middle dc voltage circuit bus.
CN201920451363.5U 2018-05-25 2019-04-04 The preliminary filling electrical circuit of traction convertor Active CN209709935U (en)

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CN112379305A (en) * 2020-10-29 2021-02-19 中车大连电力牵引研发中心有限公司 Grounding detection circuit of traction converter and control method thereof

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JP6526372B1 (en) * 2018-11-28 2019-06-05 三菱電機株式会社 Power control system
CN112350419B (en) * 2019-08-09 2023-03-24 株洲中车时代电气股份有限公司 Traction main circuit charging control method for passing power-off region and traction main circuit
CN112671253B (en) * 2021-03-15 2021-06-22 四川华泰电气股份有限公司 Cascaded H-bridge converter, open-circuit fault redundancy processing method, medium, and apparatus
CN114362561A (en) * 2021-12-30 2022-04-15 中车永济电机有限公司 Locomotive traction converter and control method thereof

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CN103368410B (en) * 2012-03-31 2015-12-09 永济新时速电机电器有限责任公司 Traction convertor
CN105720893A (en) * 2014-12-02 2016-06-29 永济新时速电机电器有限责任公司 Traction converter with secondary filter circuit
CN105790597A (en) * 2016-03-29 2016-07-20 中车永济电机有限公司 Main circuit of traction converter of PMSMs (Permanent magnet synchronous motors) for high speed railway

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CN112379305A (en) * 2020-10-29 2021-02-19 中车大连电力牵引研发中心有限公司 Grounding detection circuit of traction converter and control method thereof
CN112379305B (en) * 2020-10-29 2024-04-19 中车大连电力牵引研发中心有限公司 Ground detection circuit of traction converter and control method thereof

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