CN114379367B - Locomotive traction electric transmission system and control method thereof - Google Patents
Locomotive traction electric transmission system and control method thereof Download PDFInfo
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- CN114379367B CN114379367B CN202111638342.2A CN202111638342A CN114379367B CN 114379367 B CN114379367 B CN 114379367B CN 202111638342 A CN202111638342 A CN 202111638342A CN 114379367 B CN114379367 B CN 114379367B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L9/00—Electric propulsion with power supply external to the vehicle
- B60L9/02—Electric propulsion with power supply external to the vehicle using dc motors
- B60L9/04—Electric propulsion with power supply external to the vehicle using dc motors fed from dc supply lines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to a locomotive power supply system, in particular to a locomotive traction electric transmission system and a control method thereof. The invention provides a novel locomotive traction electric transmission system and a control method thereof, which aim to solve the problem that the power loss is overlarge when a rectifier fails in the existing locomotive traction electric transmission system. According to the invention, through optimizing the topology design of the main circuit and adopting a four-quadrant power supply mode of a common bus, the rectifier and the inverter have automatic input and cutting functions, meanwhile, the number of the precharge resistors is reduced, the main contactor and the precharge contactor are omitted, the main contactor and the precharge contactor are replaced by IGBT and integrated in the rectifying unit, the volume of the converter is reduced, the minimum power loss caused by the four-quadrant rectifying fault is ensured, and the reliability and the flexibility of the traction system are greatly improved.
Description
Technical Field
The invention relates to a locomotive power supply system, in particular to a locomotive traction electric transmission system and a control method thereof.
Background
The locomotive traction electric drive system comprises a traction system, an auxiliary system and a train power supply system. In the traditional locomotive traction electric transmission system in China, a two-to-two reverse matching mode is adopted, and the matching mode mainly has the following defects: firstly, when one four-quadrant rectifier fails, two rectifiers are required to be cut off simultaneously to prevent failure expansion, so that the inverter is cut off under the working condition without failure, the power loss is large, and the operation reliability and economy of a locomotive traction electric transmission system are greatly affected; secondly, the precharge contactor, the main contactor and the precharge resistor used in the main topology circuit are more, the occupied space is larger, and the integration level is relatively lower; in addition, the auxiliary system usually adopts an intermediate bus of one converter in the traction system to take electricity, and when one converter has rectification fault, the auxiliary system is easy to stop, so that the fault of the traction electric transmission system of the whole locomotive is enlarged.
Disclosure of Invention
The invention aims to solve the problems of the defects in the prior art, and provides a novel locomotive traction electric transmission system and a control method thereof.
The invention is realized by adopting the following technical scheme:
The locomotive traction electric transmission system comprises a traction transformer, a traction system, an auxiliary system and a train power supply system, wherein the primary side of the traction transformer is connected with a bow net through a main breaker Q1 and is provided with a plurality of secondary sides, and the traction system takes electricity from the secondary sides of the traction transformer;
The traction system comprises a plurality of traction rectifiers, a plurality of traction inverters and a plurality of traction motors; each traction rectifier comprises an input assembly, an H-shaped traction rectifying unit formed by four IGBTs and a rectifying electronic connector formed by connecting one rectifying IGBT or a plurality of rectifying IGBTs in series, wherein the input assembly is positioned between the input end of the corresponding traction rectifying unit and the secondary side of the traction transformer, the input assembly is an input assembly with a precharge function or an input assembly without the precharge function, at least one of the plurality of input assemblies is an input assembly with the precharge function, the input assembly with the precharge function comprises precharge resistors and input IGBTs, the number of the input IGBTs is two, the input IGBTs are respectively a first input IGBT and a second input IGBT, the precharge resistors are connected with the first input IGBT in series and then connected with the second input IGBT in parallel, and the input assembly without the precharge function is formed by the second input IGBT; each traction inverter comprises an inversion electronic connector formed by connecting one inversion IGBT or a plurality of inversion IGBTs in series and a traction three-phase bridge type inversion unit formed by six IGBTs, wherein the positive electrode output end of the traction rectification unit is connected with the positive electrode input end of the traction three-phase bridge type inversion unit through the inversion electronic connector and the inversion electronic connector which are sequentially connected in series, the cathode of a follow current diode of the inversion IGBT is connected with the anode of the follow current diode of the rectification IGBT, a supporting capacitor is connected between a connecting node of the follow current diode of the inversion IGBT and the negative electrode input end of the traction three-phase bridge type inversion unit, a plurality of supporting capacitors are connected in parallel to form an integral middle direct current bus, and the output end of the traction three-phase bridge type inversion unit is connected with a traction motor;
The input end of the train power supply system is connected with the middle direct current bus, and meanwhile, high-voltage middle direct current is converted into low-voltage direct current, and the output end of the train power supply system is connected to a train power supply load through a train power supply breaker Q2;
The auxiliary system comprises an auxiliary three-phase inverter and an auxiliary motor, wherein the positive electrode input end of the auxiliary three-phase inverter is connected with the positive electrode output end of the train power supply system through an auxiliary single-phase electronic connector formed by connecting an auxiliary IGBT or a plurality of auxiliary IGBTs in series, the negative electrode input end of the auxiliary three-phase inverter is connected with the negative electrode output end of the train power supply system, and the three-phase output end of the auxiliary three-phase inverter is connected with the auxiliary motor.
The control method of the locomotive traction electric transmission system is realized by a traction control system, and comprises the following steps: 1) The main circuit breaker Q1 is disconnected, the traction control system is electrified and started, each input assembly, the traction rectifying unit and the rectifying electronic connector in the traction rectifier are respectively subjected to self-checking, whether the respective closing and opening states are normal or not is determined by detecting respective feedback signals, when abnormal operation of the device occurs, the fault device is detected again, and if the detection is abnormal, the fault is reported immediately; 2) When the self-checking is all normal, the main breaker Q1 is closed, and the precharge phase is entered: sending high level to the rectification IGBT of the rectification electronic connector in one traction rectifier with the precharge function of the traction system and sending low level to all other IGBTs, thereby ensuring that only one traction rectification unit with the precharge function is connected to the middle direct current bus; a first input IGBT for transmitting a high level to an input assembly in a traction rectifier connected to the intermediate DC bus, a second input IGBT for transmitting a low level to an input assembly in a traction rectifier connected to the intermediate DC bus, when detecting that the intermediate DC bus voltage reaches 1.1 times the output voltage of the traction transformer, a second input IGBT for transmitting a high level to an input assembly in a traction rectifier connected to the intermediate DC bus, when receiving a feedback signal that the second input IGBT of an input assembly in a traction rectifier connected to the intermediate DC bus is on, a first input IGBT for transmitting a low level to an input assembly in a traction rectifier connected to the intermediate DC bus, after receiving a feedback signal that a first input IGBT of an input assembly in a traction rectifier connected to the middle direct current bus is disconnected, sending a high level to all rectifying electronic connectors in the traction system to enable all the rectifying electronic connectors to be conducted, further enabling all the other migration rectifiers to be in a channel state with the middle direct current bus, finally enabling the input assemblies in the other traction rectifiers to be conducted, completing a pre-charging process of the traction system, and completing pre-charging marking by the traction control system; 3) After the precharge phase of the traction control system is completed, a traction rectifier starting instruction is sent, all traction rectifying units in the traction rectifiers are started simultaneously, and the starting states of all traction rectifying units and corresponding alternating currents are matched, so that whether all traction rectifying units are started normally or not and whether the starting is completed or not is judged; 4) When the starting of each traction rectifying unit is completed, after the voltage of the middle direct current bus is established stably, starting the train power supply system, detecting the output voltage of the train power supply system, and when the output voltage of the train power supply system is stabilized at a command value, finishing starting marking by the train power supply system; when the train power supply system is started, the train power supply circuit breaker Q2 is closed to supply power to the train power supply load; 5) The auxiliary system is electrified, pulse signals are sent to an auxiliary three-phase inversion unit, the auxiliary three-phase inversion unit is started, and an auxiliary motor works; 6) When the traction control system detects that the auxiliary system works normally, the traction control system sends a high level to the inversion IGBTs of the inversion electronic connectors in all traction inverters in the traction system, so that all traction three-phase bridge type inversion units are communicated with the middle direct current bus, and when the traction control system receives a feedback signal for normally opening the corresponding inversion electronic connectors, the traction three-phase bridge type inversion units are started.
The beneficial effects of the invention are as follows: according to the invention, through optimizing the circuit topology structure and adopting a power supply mode of a common intermediate direct current bus, the traction rectifier and the traction inverter have automatic input and cutting functions, meanwhile, the number of the precharge resistors is reduced, the main contactor and the precharge contactor are omitted, the main contactor and the precharge contactor are replaced by IGBT, and are integrated in the rectifier, so that the volume of a locomotive traction electric transmission system is reduced, the power loss caused by rectification faults is minimized, and the reliability and flexibility of the traction electric transmission system are greatly improved; meanwhile, the main and auxiliary integrated electric transmission system, the auxiliary system and the front stage of the train supply system have stronger redundancy characteristic and reliable power supply capability, the auxiliary system adopts a permanent magnet fan, stepless speed regulation can be carried out, the fan rotating speed under different working conditions can be met, and the wide-range heat dissipation capability is provided.
Drawings
FIG. 1 is a diagram of the topology of a main circuit of the present invention;
FIG. 2 is a diagram of the topology of the main circuit of the train power supply system of the present invention;
Fig. 3 is a main circuit topology diagram of the auxiliary system of the present invention.
In the figure: 1-rectifying electronic connector, 2-input assembly, 21-pre-charging resistor, 22-first input IGBT, 23-second input IGBT, 3-inverting electronic connector, 4-traction motor, 5-traction rectifying unit, 6-traction three-phase bridge inverting unit, 7-auxiliary single-phase electronic connector, 8-auxiliary three-phase electronic connector, 9-permanent magnet fan and 10-auxiliary three-phase inverter.
Detailed Description
As shown in fig. 1, the locomotive traction electric transmission system, a traction transformer, a traction system, an auxiliary system and a train power supply system, wherein the primary side of the traction transformer is connected with the bow net through a main breaker Q1 and is provided with a plurality of secondary sides, and the traction system takes electricity from the secondary sides of the traction transformer;
The traction system comprises a plurality of traction rectifiers, a plurality of traction inverters and a plurality of traction motors 4; each traction rectifier comprises an input assembly 2, an H-shaped traction rectifying unit 5 formed by four IGBT and a rectifying electronic connector 1 formed by connecting one rectifying IGBT or a plurality of rectifying IGBT in series, wherein the input assembly 2 is positioned between the input end of the corresponding traction rectifying unit 5 and the secondary side of the traction transformer, the input assembly 2 is the input assembly 2 with a precharge function or the input assembly 2 without the precharge function, at least one of the plurality of input assemblies 2 is the input assembly 2 with the precharge function, the input assembly 2 with the precharge function comprises a precharge resistor 21 and two input IGBT, the two input IGBT are respectively a first input IGBT22 and a second input IGBT23, the precharge resistor 21 is connected with the first input IGBT22 in series and then connected with the second input IGBT23 in parallel, and the input assembly 2 without the precharge function is formed by the second input IGBT 23; each traction inverter comprises an inversion electronic connector 3 formed by connecting one inversion IGBT or a plurality of inversion IGBTs in series and a traction three-phase bridge type inversion unit 6 formed by six IGBTs, wherein the positive output end of the traction rectifying unit 5 is connected with the positive input end of the traction three-phase bridge type inversion unit 6 through the inversion electronic connector 1 and the inversion electronic connector 3 which are sequentially connected in series, the cathode of a follow current diode of the inversion IGBT is connected with the anode of a follow current diode of the rectification IGBT, a supporting capacitor is connected between a connecting node of the follow current diode of the inversion IGBT and the negative input end of the traction three-phase bridge type inversion unit 6, a plurality of supporting capacitors are connected in parallel to form an integral middle direct current bus, and the output end of the traction three-phase bridge type inversion unit 6 is connected with a traction motor 4;
The input end of the train power supply system is connected with the middle direct current bus, and meanwhile, high-voltage middle direct current is converted into low-voltage direct current (how the train power supply system realizes the conversion of high-voltage middle direct current into low-voltage direct current belongs to common knowledge of a person skilled in the art), and the output end of the train power supply system is connected to a train power supply load through a train power supply breaker Q2;
The auxiliary system comprises an auxiliary three-phase inverter 10 (the circuit structure of the auxiliary three-phase inverter 10 belongs to the conventional circuit structure in the field), an auxiliary motor, wherein the positive electrode input end of the auxiliary three-phase inverter 10 is connected with the positive electrode output end of the train power supply system through an auxiliary single-phase electronic connector 7 formed by connecting an auxiliary IGBT or a plurality of auxiliary IGBTs in series, the negative electrode input end of the auxiliary three-phase inverter 10 is connected with the negative electrode output end of the train power supply system, and the three-phase output end of the auxiliary three-phase inverter 10 is connected with the auxiliary motor.
In a specific embodiment, as shown in fig. 3, the auxiliary three-phase inverter 10 includes an auxiliary three-phase bridge inverter unit formed by six IGBTs, a fourth parallel circuit formed by a fourth resistor and a fourth capacitor, and a fifth parallel circuit formed by a fifth resistor and a fifth capacitor, where the connection nodes of the upper and lower bridge arms of each phase of the auxiliary three-phase bridge inverter unit are all connected in series with an H-bridge circuit formed by 4 IGBTs, the output end of the H-bridge circuit is connected to an auxiliary motor through an auxiliary three-phase electronic connector 8, the auxiliary motor is a common point formed by connecting non-output ends of connection nodes of the upper and lower bridge arms of three phases of the permanent magnet fan 9,H bridge circuit, and the fourth parallel circuit is connected between the common point and the positive input end of the auxiliary three-phase bridge inverter unit, and the fifth parallel circuit is connected between the common point and the negative input end of the auxiliary three-phase bridge inverter unit.
As shown in fig. 2, the train power supply system includes a diode, a column inverter, a high-frequency transformer and a column rectifier, the column inverter includes a first parallel circuit composed of four IGBTs, a first resistor and a first capacitor, a second parallel circuit composed of a second resistor and a second capacitor, the positive input terminal of the column inverter is sequentially connected with the positive terminal of the intermediate dc bus through the upper IGBT, the diode, the negative input terminal of the column inverter is connected with the negative terminal of the intermediate dc bus through the lower IGBT, the column rectifier includes a column rectifier unit composed of four diodes, a third parallel circuit composed of a third resistor and a third capacitor, the output terminal of the column rectifier unit is connected with the train power supply load through a column inverter Q2, the primary side of the high-frequency transformer is connected with the output terminal of the column inverter unit, the negative terminal of the high-frequency transformer is connected with the positive terminal of the high-frequency bridge inverter unit, and the parallel circuit between the connection node of the high-frequency transformer and the upper IGBT is connected with the negative terminal of the high-frequency bridge inverter, and the parallel circuit between the primary side of the column inverter unit and the high-frequency bridge has a parallel circuit connected with the negative terminal of the high-frequency bridge inverter.
The traction transformer is provided with four secondary sides T1, T2, T3 and T4, four traction rectifiers are respectively a first rectifier, a second rectifier, a third rectifier and a fourth rectifier, input assemblies 2 in the first rectifier and the second rectifier are all input assemblies 2 with a precharge function and are precharge redundant assemblies, input assemblies 2 in the third rectifier and the fourth rectifier are all input assemblies 2 without the precharge function, and the number of the inverters is four.
In this embodiment, the rectifying electronic connector 1 is formed by connecting two rectifying IGBTs in series, the inverting electronic connector 3 is formed by connecting two inverting IGBTs in series, the auxiliary single-phase electronic connector 7 is formed by connecting two auxiliary IGBTs in series, and each phase of the auxiliary three-phase electronic connector 8 is formed by connecting two auxiliary IGBTs in series. As shown in fig. 2, the train power supply system includes a diode, a train power inverter, a high frequency transformer, and a train power rectifier.
The control method of the locomotive traction electric transmission system is realized through a traction control system and comprises the following steps of: 1) The main circuit breaker Q1 is disconnected, the traction control system is electrified and started, each input assembly 2, the traction rectifying unit 5 and the rectifying electronic connector 1 in the traction rectifier are subjected to closing and opening instructions, self-detection is respectively carried out, whether the respective closing and opening states are normal or not is determined by detecting respective feedback signals, when abnormal operation of devices occurs, a fault device is detected again, and if the detection is abnormal, the fault is reported immediately; 2) When the self-checking is all normal, the main breaker Q1 is closed, and the precharge phase is entered: transmitting a high level to the rectifying electronic connector 1 in the first rectifier of the traction system to enable the rectifying electronic connector 1 to be conducted, and transmitting a low level to all other rectifying IGBTs of the traction system, so that only the traction rectifying unit 5 of the first rectifier is guaranteed to be connected to the middle direct current bus; the first input IGBT22 of the input assembly 2 in the first rectifier is sent to a high level, the second input IGBT23 of the input assembly 2 in the first rectifier is sent to a low level, when the intermediate DC bus voltage reaches 1.1 times of the output voltage of the traction transformer, the second input IGBT23 of the input assembly 2 in the first rectifier is sent to the high level, after receiving the feedback signal that the second input IGBT23 of the input assembly 2 in the first rectifier is opened, the first input IGBT22 of the input assembly 2 in the first rectifier is sent to the low level, after receiving the feedback signal that the first input IGBT22 of the input assembly 2 in the first rectifier is opened, sending high level to the rectifying electronic connectors 1 in the second rectifier, the third rectifier and the fourth rectifier in the traction system to enable all the rectifying electronic connectors 1 to be conducted, further enabling the rest of traction rectifying elements 5 to be in a channel state with the middle direct current bus, and finally enabling the input assemblies 2 in the second rectifier, the third rectifier and the fourth rectifier to be conducted to finish the pre-charging process of the traction system, and enabling the traction control system to finish pre-charging marking; if the first rectifier cannot complete the precharge, transmitting a low level to the rectifying electronic connector 1 in the first rectifier and the first and second input IGBTs 22 and 23 in the input assembly 2 in the first rectifier, disconnecting the traction rectifying unit 5 from the intermediate dc bus and from the traction transformer, and then restarting the precharge process of the first rectifier, if the second precharge cannot be completed, transmitting a low level to the rectifying electronic connector 1 in the first rectifier and the first and second input IGBTs 22 and 23 in the corresponding input assembly 2, thereby disconnecting the traction rectifying unit 5 from the intermediate dc bus, The traction rectifying unit 5 is isolated and disconnected and performs fault reporting; the second rectifier is used for carrying out a pre-charging program, if the second rectifier cannot complete pre-charging, the traction control system cuts off a main breaker signal and simultaneously carries out fault reporting; 3) After the precharge phase of the traction control system is completed, a traction rectifier starting instruction is sent, all traction rectifying units 5 in the traction rectifiers are started simultaneously, and the starting states of all the traction rectifying units 5 and corresponding alternating currents thereof are matched, so that whether all the traction rectifying units 5 are started normally or not and whether the starting is completed or not is judged; 4) When the starting of each traction rectifying unit 5 is completed and the voltage of the middle direct current bus is built stably, the train power supply inverter of the train power supply system is enabled by pulse, the train power supply system starts to start, the output voltage of the train power supply system is detected, and when the output voltage of the train power supply system is stabilized at a command value, the train power supply system completes starting marking; when the train power supply system is started, the train power supply circuit breaker Q2 is closed to supply power to the train power supply load; 5) The auxiliary system is electrified, the high level is sent to the auxiliary single-phase electronic connector 7 of the auxiliary system, the high level is sent to the auxiliary three-phase electronic connector 8, a permanent magnet fan 9 and the auxiliary three-phase inversion unit 10 form a passage, after the feedback signals of the single-phase electronic connector and the auxiliary three-phase electronic connector 8 are detected to be normal, a pulse signal is sent to the auxiliary three-phase inversion unit 10, the auxiliary three-phase inversion unit 10 is started, and the permanent magnet fan 9 works; 6) When the traction control system detects that the auxiliary system works normally, a high level is sent to the inversion IGBTs of the inversion electronic connectors 3 in all traction inverters in the traction system, so that all traction three-phase bridge inversion units 6 are communicated with the middle direct current bus, and when the traction control system receives a feedback signal for normally opening the corresponding inversion electronic connectors 3, the traction three-phase bridge inversion units 6 are started; 7) When the traction motor 4 runs below 70% rated power and any traction rectifying unit 5 breaks down, the driving signals of the corresponding input assembly 2 and the rectifying electronic connector 1 are immediately set to be low level, the isolation of the traction rectifying unit 5 from the traction transformer and the middle direct current bus is ensured, the expansion of the fault is avoided, and the power supply reliability of the middle direct current bus is affected; when any traction three-phase bridge type inversion unit 6 fails, the corresponding inversion electronic connector 3 is immediately set to be low level, so that the traction three-phase bridge type inversion unit 6 is isolated from the middle direct current bus; 8) The traction control system comprises a power balance operation unit for completing rectification and inversion integral power matching and balancing control of power among traction rectification units 5 and among traction three-phase bridge type inversion units 6, when four traction three-phase bridge type inversion units 6 are all on line, a traction motor 4 operates under rated power working condition, and fault isolation off-line of one traction rectification unit 5 occurs, in order to ensure that the voltage of an intermediate direct current bus is not pulled down and no overcurrent fault exists in four quadrants, the traction control system sends a first slope instruction to enable the traction motor 4 to perform power reduction operation according to the first slope instruction, then to perform power lifting operation according to a second slope instruction, the control system at the moment rapidly and uniformly distributes the motor power of the rear-stage operation to the residual traction rectifying units 5 through the power balance operation unit; when more than two traction rectifying units 5 are separated and disconnected, the traction motor 4 performs power reduction operation, and a power matching unit in the control system determines the motor operation power according to the working number and rated power of the traction rectifying units 5.
Claims (8)
1. The locomotive traction electric transmission system is characterized by comprising a traction transformer, a traction system, an auxiliary system and a train power supply system, wherein the primary side of the traction transformer is connected with a bow net through a main breaker Q1 and is provided with a plurality of secondary sides, and the traction system takes electricity from the secondary sides of the traction transformer;
The traction system comprises a plurality of traction rectifiers, a plurality of traction inverters and a plurality of traction motors (4); each traction rectifier comprises an input component (2), an H-shaped traction rectifying unit (5) formed by four IGBT (insulated gate bipolar transistors) and a rectifying electronic connector (1) formed by connecting one rectifying IGBT or a plurality of rectifying IGBT in series, wherein the input component (2) is positioned between the input end of the corresponding traction rectifying unit (5) and the secondary side of the traction transformer, the input component (2) is the input component (2) with a precharge function or the input component (2) without the precharge function, at least one of the plurality of input components (2) is the input component (2) with the precharge function, the input component (2) with the precharge function comprises a precharge resistor (21) and two input IGBT(s), the input IGBT is respectively a first input IGBT (22) and a second input IGBT (23), the precharge resistor (21) is connected with the first input IGBT (22) in series and then is connected with the second input IGBT (23) in parallel, and the input component (2) without the precharge function is formed by the second input IGBT (23); each traction inverter comprises an inversion electronic connector (3) formed by connecting one inversion IGBT or a plurality of inversion IGBTs in series and a traction three-phase bridge type inversion unit (6) formed by six IGBTs, wherein the positive output end of the traction rectification unit (5) is connected with the positive input end of the traction three-phase bridge type inversion unit (6) through the inversion electronic connector (1) and the inversion electronic connector (3) which are sequentially connected in series, the cathode of a freewheeling diode of the inversion IGBT is connected with the anode of the freewheeling diode of the rectification IGBT, a supporting capacitor is connected between a connecting node of the freewheeling diode of the inversion IGBT and the negative input end of the traction three-phase bridge type inversion unit (6), the plurality of supporting capacitors are connected in parallel to each other to form an integral middle direct current bus, and the output end of the traction three-phase bridge type inversion unit (6) is connected with a traction motor (4);
the train power supply system comprises a diode, a train power supply inverter, a high-frequency transformer and a train power supply rectifier, wherein the train power supply inverter comprises a train power supply H-bridge inverter unit formed by four IGBT, a first parallel circuit formed by a first resistor and a first capacitor, a second parallel circuit formed by a second resistor and a second capacitor, the positive input end of the train power supply H-bridge inverter unit is sequentially connected with the positive electrode of an intermediate DC bus through an upper IGBT and the diode, the negative input end of the train power supply H-bridge inverter unit is connected with the negative electrode of the intermediate DC bus through a lower IGBT, the train power supply rectifier comprises a train power supply H-bridge rectifier unit formed by four diodes, a third parallel circuit formed by a third resistor and a third capacitor, the output end of the train power supply H-bridge rectifier unit is connected with the two ends of the third parallel circuit through a train power supply breaker Q2, the primary side of the high-frequency transformer is connected with the output end of the train supply H bridge inversion unit, a first parallel circuit is connected between the negative electrode of the primary side of the high-frequency transformer and the negative electrode of the follow current diode of the upper IGBT in parallel, a second parallel circuit is connected between the negative electrode of the primary side of the high-frequency transformer and the positive electrode of the follow current diode of the lower IGBT in parallel, the secondary side of the high-frequency transformer is connected with the input end of the train supply H type rectification unit, the input end of the train supply system is connected with the middle direct current bus, meanwhile, the high-voltage middle direct current is converted into low-voltage direct current, and the output end of the train supply system is connected to a train supply load through the train supply breaker Q2;
The auxiliary system comprises an auxiliary three-phase inverter (10) and an auxiliary motor, wherein the positive input end of the auxiliary three-phase inverter (10) is connected with the positive output end of the train power supply system through an auxiliary single-phase electronic connector (7) formed by connecting one auxiliary IGBT or a plurality of auxiliary IGBTs in series, the negative input end of the auxiliary three-phase inverter (10) is connected with the negative output end of the train power supply system, the three-phase output end of the auxiliary three-phase inverter (10) is connected with the auxiliary motor, the auxiliary three-phase inverter (10) comprises an auxiliary three-phase bridge inverter unit formed by six IGBTs, a fourth parallel circuit formed by a fourth resistor and a fourth capacitor, a fifth parallel circuit formed by connecting a fifth resistor and a fifth capacitor, the output end of the H-bridge circuit is connected with the auxiliary motor through an auxiliary three-phase electronic connector (8), the three-phase output ends of the H-bridge circuit are connected with the non-output ends of the upper bridge arm and the lower bridge arm connecting nodes of the three phases of the H-bridge circuit to form a common bridge type inverter unit, the common-phase inverter unit is connected with the positive input end of the fifth parallel circuit, and the common input end of the common bridge inverter unit is connected with the common node between the fifth parallel circuit and the common input end of the auxiliary three-phase inverter unit.
2. The locomotive traction electric drive system of claim 1 wherein the traction transformer has four secondary sides T1, T2, T3, T4, four traction rectifiers are respectively a first rectifier, a second rectifier, a third rectifier, a fourth rectifier, the input components (2) in the first rectifier and the second rectifier are all input components (2) with a precharge function and are mutually precharge redundant components, the input components (2) in the third rectifier and the fourth rectifier are all input components (2) without a precharge function, and the inverter is four.
3. Locomotive traction electric drive system according to claim 2, characterized in that the rectifying electronic connector (1) is formed by two rectifying IGBTs in series, the inverting electronic connector (3) is formed by two inverting IGBTs in series, the auxiliary single-phase electronic connector (7) is formed by two auxiliary IGBTs in series, each phase of the auxiliary three-phase electronic connector (8) is formed by two auxiliary IGBTs in series.
4. The method of controlling a locomotive traction electric drive system of claim 1, wherein the method is implemented by a traction control system comprising the steps of: 1) The main circuit breaker Q1 is disconnected, the traction control system is electrified and started, each input assembly (2), the traction rectifying unit (5) and the rectifying electronic connector (1) in the traction rectifier are respectively subjected to self-checking, whether the respective closing and opening states are normal or not is determined by detecting respective feedback signals, when abnormal operation of the existing device occurs, the fault device is detected again, and if the detection is abnormal, the fault is reported immediately; 2) When the self-checking is all normal, the main breaker Q1 is closed, and the precharge phase is entered: sending a high level to the rectifying IGBT of the rectifying electronic connector (1) in one of the traction rectifiers with the precharge function of the traction system and sending a low level to all the other IGBTs, thereby ensuring that only one of the traction rectifying units (5) with the precharge function is connected to the middle direct current bus; a first input IGBT (22) for transmitting a high level to an input component (2) in the traction rectifier connected to the intermediate DC bus, a second input IGBT (23) for transmitting a low level to the input component (2) in the traction rectifier connected to the intermediate DC bus, when detecting that the intermediate DC bus voltage reaches 1.1 times the output voltage of the traction transformer, a second input IGBT (23) for transmitting a high level to the input component (2) in the traction rectifier connected to the intermediate DC bus, when receiving a feedback signal that the second input IGBT (23) of the input component (2) in the traction rectifier connected to the intermediate DC bus is on, the method comprises the steps of sending a low level to a first input IGBT (22) of an input assembly (2) in a traction rectifier connected to an intermediate direct current bus, after receiving a feedback signal that the first input IGBT (22) of the input assembly (2) in the traction rectifier connected to the intermediate direct current bus is disconnected, sending a high level to all rectifying electronic connectors (1) in the traction system to enable all the rectifying electronic connectors (1) to be conducted, further enabling all the other migration rectifiers to be in a channel state with the intermediate direct current bus, finally enabling all the input assemblies (2) in the other traction rectifiers to be conducted, completing a pre-charging process of the traction system, and enabling a traction control system to complete pre-charging marking; 3) After the precharge phase of the traction control system is completed, a traction rectifier starting instruction is sent, all traction rectifying units (5) in the traction rectifier are started simultaneously, and the starting states of all the traction rectifying units (5) and corresponding alternating currents are matched, so that whether all the traction rectifying units (5) are started normally or not and whether the starting is completed or not is judged; 4) When all the traction rectifying units (5) are started, after the voltage of the middle direct current bus is stably established, starting the train power supply system, detecting the output voltage of the train power supply system, and when the output voltage of the train power supply system is stabilized at a command value, finishing starting labeling by the train power supply system; when the train power supply system is started, the train power supply circuit breaker Q2 is closed to supply power to the train power supply load; 5) An auxiliary single-phase electronic connector (7) for transmitting a high level to an auxiliary system, wherein the auxiliary system is electrified, a pulse signal is transmitted to an auxiliary three-phase bridge type inversion unit, the auxiliary three-phase bridge type inversion unit is started, and an auxiliary motor works; 6) When the traction control system detects that the auxiliary system works normally, high level is sent to inversion IGBTs of inversion electronic connectors (3) in all traction inverters in the traction system, so that all traction three-phase bridge inversion units (6) are communicated with the middle direct current bus, and when the traction control system receives a feedback signal for normally opening the corresponding inversion electronic connectors (3), the traction three-phase bridge inversion units (6) are started.
5. A method of controlling a locomotive traction electric drive system according to claim 2 or 3, wherein the control method is implemented by a traction control system comprising the steps of: the main circuit breaker Q1 is disconnected, the traction control system is electrified and started, each input assembly (2), the traction rectifying unit (5) and the rectifying electronic connector (1) in the traction rectifier are respectively subjected to self-checking, whether the respective closing and opening states are normal or not is determined by detecting respective feedback signals, when abnormal operation of the existing device occurs, the fault device is detected again, and if the detection is abnormal, the fault is reported immediately; 2) When the self-checking is all normal, the main breaker Q1 is closed, and the precharge phase is entered: sending a high level to a rectifying electronic connector (1) in a first rectifier of the traction system to enable the rectifying electronic connector (1) to be conducted, and sending a low level to all other rectifying IGBTs of the traction system, so that only a traction rectifying unit (5) of the first rectifier is guaranteed to be connected to a middle direct current bus; a first input IGBT (22) for transmitting a high level to the input assembly (2) in the first rectifier, a second input IGBT (23) for transmitting a low level to the input assembly (2) in the first rectifier, a second input IGBT (23) for transmitting a high level to the input assembly (2) in the first rectifier when detecting that the intermediate DC bus voltage reaches 1.1 times the output voltage of the traction transformer, a first input IGBT (22) for transmitting a low level to the input assembly (2) in the first rectifier after receiving a feedback signal that the second input IGBT (23) of the input assembly (2) in the first rectifier is turned on, after receiving a feedback signal that a first input IGBT (22) of an input component (2) in a first rectifier is disconnected, sending a high level to rectifying electronic connectors (1) in a second rectifier, a third rectifier and a fourth rectifier in a traction system to enable all the rectifying electronic connectors (1) to be conducted, further enabling other traction rectifying elements (5) to be in a channel state with an intermediate direct current bus, finally enabling the input components (2) in the second rectifier, the third rectifier and the fourth rectifier to be conducted, completing a pre-charging process of the traction system, and enabling a traction control system to complete pre-charging marking; 3) After the precharge phase of the traction control system is completed, a traction rectifier starting instruction is sent, all traction rectifying units (5) in the traction rectifier are started simultaneously, and the starting states of all the traction rectifying units (5) and corresponding alternating currents are matched, so that whether all the traction rectifying units (5) are started normally or not and whether the starting is completed or not is judged; 4) When the starting of each traction rectifying unit (5) is completely finished and the voltage of the middle direct current bus is stably established, the train power supply inverter of the train power supply system is enabled by pulse, the train power supply system starts to start, the output voltage of the train power supply system is detected, and when the output voltage of the train power supply system is stabilized at a command value, the train power supply system finishes starting marking; when the train power supply system is started, the train power supply circuit breaker Q2 is closed to supply power to the train power supply load; 5) The method comprises the steps of sending a high level to an auxiliary single-phase electronic connector (7) of an auxiliary system, electrifying the auxiliary system, sending the high level to an auxiliary three-phase electronic connector (8), forming a passage between a permanent magnet fan (9) and an auxiliary three-phase bridge type inversion unit, and sending a pulse signal to the auxiliary three-phase bridge type inversion unit after detecting that feedback signals of the single-phase electronic connector and the auxiliary three-phase electronic connector (8) are normal, wherein the auxiliary three-phase bridge type inversion unit is started, and the permanent magnet fan (9) works; 6) When the traction control system detects that the auxiliary system works normally, high level is sent to inversion IGBTs of inversion electronic connectors (3) in all traction inverters in the traction system, so that all traction three-phase bridge inversion units (6) are communicated with the middle direct current bus, and when the traction control system receives a feedback signal for normally opening the corresponding inversion electronic connectors (3), the traction three-phase bridge inversion units (6) are started.
6. The method according to claim 5, wherein in step 2), if the first rectifier fails to complete the precharge, a low level is sent to the rectifying electronic connector (1) in the first rectifier and the first input IGBT (22) and the second input IGBT (23) in the input assembly (2) in the first rectifier, the traction rectifying unit (5) is disconnected from the intermediate dc bus and from the traction transformer, and then the precharge procedure of the first rectifier is started again, if the second precharge is still not completed, a low level is sent to the rectifying electronic connector (1) in the first rectifier and the first input IGBT (22) and the second input IGBT (23) in the corresponding input assembly (2), thereby disconnecting the traction rectifying unit (5) from the intermediate dc bus and the traction transformer, and the traction rectifying unit (5) is isolated from the line and reporting a fault; and (3) using the second rectifier to perform a pre-charging program, and if the second rectifier cannot complete pre-charging, disconnecting the main breaker signal by the traction control system and reporting faults.
7. The control method of a locomotive traction electric transmission system according to claim 6, characterized in that when all four traction three-phase bridge inverter units (6) are on line and a traction motor (4) runs below 70% rated power, any one traction rectifying unit (5) breaks down, driving signals of a corresponding input assembly (2) and a rectifying electronic connector (1) are immediately set to be low level, isolation of the traction rectifying unit (5) from a traction transformer and an intermediate direct current bus is ensured, expansion of faults is avoided, and power supply reliability of the intermediate direct current bus is affected; when any traction three-phase bridge type inversion unit (6) fails, the corresponding inversion electronic connector (3) is immediately set to be low level, and isolation between the traction three-phase bridge type inversion unit (6) and the middle direct current bus is ensured.
8. The control method of a locomotive traction electric transmission system according to claim 7, wherein the traction control system comprises a power balance operation unit for completing rectification, inversion overall power matching and balance control of power among traction rectification units (5) and among traction three-phase bridge type inversion units (6), when four traction three-phase bridge type inversion units (6) are all on line, and when one traction rectification unit (5) is in fault isolation and disconnection occurs under rated power working conditions, the traction control system sends out a first slope instruction to enable the traction motor (4) to perform power reduction operation according to the first slope instruction, then all of the traction motor is operated under full power according to a second slope instruction, and the control system at this time rapidly and uniformly distributes motor power operated at a later stage to the rest traction rectification units (5) through the power balance operation unit; when more than two traction rectifying units (5) are separated and disconnected, the traction motor (4) performs power reduction operation, and a power matching unit in the control system determines the motor operation power according to the working number and rated power of the traction rectifying units (5).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296897A (en) * | 2012-03-05 | 2013-09-11 | 永济新时速电机电器有限责任公司 | Traction converter and electric transmission system of electric locomotive |
| CN103407377A (en) * | 2013-06-24 | 2013-11-27 | 长春轨道客车股份有限公司 | Motor train unit traction system powered up by overhead contact system and power pack in combined mode |
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| CN108696149A (en) * | 2018-05-25 | 2018-10-23 | 中车青岛四方车辆研究所有限公司 | Traction convertor and its control, troubleshooting and phase-shifting carrier wave method |
| CN111446867B (en) * | 2019-12-30 | 2021-05-28 | 中铁电气化局集团有限公司 | Through in-phase traction power supply system based on four-port modular multilevel converter |
| CN112737356A (en) * | 2020-12-25 | 2021-04-30 | 中车永济电机有限公司 | High-power permanent-magnet direct-drive freight locomotive traction converter |
| CN113043868B (en) * | 2021-04-23 | 2022-11-01 | 株洲中车时代电气股份有限公司 | Train traction control system and operation mode switching method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103296897A (en) * | 2012-03-05 | 2013-09-11 | 永济新时速电机电器有限责任公司 | Traction converter and electric transmission system of electric locomotive |
| CN103407377A (en) * | 2013-06-24 | 2013-11-27 | 长春轨道客车股份有限公司 | Motor train unit traction system powered up by overhead contact system and power pack in combined mode |
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