CN113562004A - Storage battery power supply system and method for mining electric wheel vehicle - Google Patents
Storage battery power supply system and method for mining electric wheel vehicle Download PDFInfo
- Publication number
- CN113562004A CN113562004A CN202010349921.4A CN202010349921A CN113562004A CN 113562004 A CN113562004 A CN 113562004A CN 202010349921 A CN202010349921 A CN 202010349921A CN 113562004 A CN113562004 A CN 113562004A
- Authority
- CN
- China
- Prior art keywords
- converter
- power supply
- auxiliary
- main
- storage battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005065 mining Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 61
- 238000006243 chemical reaction Methods 0.000 claims abstract description 51
- 230000008569 process Effects 0.000 claims abstract description 11
- 230000002159 abnormal effect Effects 0.000 claims description 20
- 230000009467 reduction Effects 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 10
- 208000037516 chromosome inversion disease Diseases 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C3/00—Electric locomotives or railcars
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C3/00—Electric locomotives or railcars
- B61C3/02—Electric locomotives or railcars with electric accumulators
Abstract
The invention discloses a storage battery power supply system for a mining electric wheel vehicle, which comprises: a main generator; the traction converter comprises a main converter and an auxiliary converter, wherein the input end of the main converter is connected with the main generator and is used for outputting a plurality of groups of alternating current power supplies for driving the traction motor, and the first end of the auxiliary converter is connected with a middle direct current loop in the main converter and is used for outputting a direct current constant voltage power supply; the traction motor is connected with the output end of the main converter; a bidirectional DC/DC conversion device connected to the second end of the auxiliary converter, for charging/performing a traction function of the accumulator device by a step-down/step-up process according to an operating state of the main generator; and a battery device connected to the bidirectional DC/DC converter. The invention has high reliability, meets the requirement of the electric wheel mine car on an electric drive system, and can still supply power to the traction motor and charge the storage battery when the main generator fails.
Description
Technical Field
The invention relates to the technical field of electric transmission and traction of off-highway vehicles, in particular to a storage battery power supply system and method for a mining electric wheel vehicle.
Background
The mining electric wheel vehicle is a large and ultra-large vehicle using a diesel engine as a power source, and is widely applied to occasions requiring a large amount of transportation work, such as mines, large-scale building engineering, hydroelectric dam engineering, iron powder or coal yards, and the like. Because the oil consumption of the large diesel engine configured for the off-highway vehicles is remarkable, the volume of an oil tank of the off-highway vehicle is about thousands of liters to thousands of liters according to the difference of specific load tonnage, and the oil consumption is converted into millions of yuan every year. According to statistics, the transportation cost of the off-highway vehicles accounts for about 45-55% of the ore cost, and the energy consumption of the off-highway vehicles accounts for about 40-60% of the total energy consumption of the ore. The displacement of off-highway vehicles is very large, also resulting in significant emissions of atmospheric pollutants.
The mining electric wheel vehicle generates three-phase alternating current through a generator, and the three-phase alternating current is rectified and then inverted into a variable-frequency variable-voltage power supply to supply power to a traction motor. When the generator fails, the vehicle is unable to operate because traction is lost. In the prior art, when the generator breaks down, the electric drive system cannot work, so that the vehicle cannot run, and the traction vehicle needs to be arranged to pull the broken off-highway vehicle back to a warehouse, which is extremely inconvenient. In addition, when the generator breaks down, still can adopt the auxiliary generator to charge for the battery at present, after the auxiliary generator breaks down, also can't charge for the battery to make the vehicle unable operation because of the battery feed phenomenon appears.
The storage battery power supply system provided by the invention solves the problem of storage battery charging, and under the condition that the generator cannot operate, the storage battery supplies power to the traction motor and the auxiliary system, so that the vehicle can slowly operate and return to the garage. The mine car that operates at present all adopts generator auxiliary winding to charge for the battery, and the vehicle can't move after the generator damages.
Disclosure of Invention
One of the technical problems to be solved by the present invention is to provide a new technical solution with low cost, less additional equipment and less damage to the traction motor. According to the scheme, when the main generator fails, energy is provided for the traction converter through the energy stored in the vehicle-mounted storage battery, so that the traction motor is started, and the emergency traction of a vehicle is realized.
In order to solve the technical problem, the present invention provides a battery power supply system for a mining electric wheel vehicle, the system comprising: a main generator; the traction converter comprises a main converter and an auxiliary converter, wherein the input end of the main converter is connected with the main generator and is used for outputting a plurality of groups of alternating current power supplies for driving a traction motor, and the first end of the auxiliary converter is connected with a middle direct current loop in the main converter and is used for outputting a direct current constant voltage power supply; the traction motor is connected with the output end of the main converter; a bidirectional DC/DC conversion device connected to a second end of the auxiliary converter, for charging a battery device/performing a traction function of the battery device through a buck/boost process according to an operating state of the main generator; the storage battery device is connected with the bidirectional DC/DC conversion device.
Preferably, the traction converter adopts a main and auxiliary integrated traction converter integrated with the main converter and the auxiliary converter; the bidirectional DC/DC conversion device adopts a bidirectional DC/DC charger.
Preferably, when the working state of the main generator is normal, the storage battery device enters a charging state, and further, the flow direction of the electric energy of the storage battery power supply system is as follows: the main generator, the main converter, the auxiliary converter, the bidirectional DC/DC conversion device and the storage battery device.
Preferably, when the main generator is in a normal operating state, the auxiliary inverter includes: an auxiliary inverter connected to an intermediate dc circuit in the main converter, for inverting a voltage obtained by the intermediate dc circuit to a corresponding first ac voltage; an auxiliary transformer which is positioned between the auxiliary inverter and the auxiliary rectifier, and outputs a second alternating voltage after the first alternating voltage is subjected to voltage reduction processing; the auxiliary rectifier rectifies the second alternating-current voltage into the direct-current constant-voltage power supply that satisfies an electrical demand condition of the bidirectional DC/DC conversion device.
Preferably, when the operating state of the main generator is abnormal, the battery device enters a discharging state, and further, the flow direction of the electric energy of the battery power supply system is as follows: the storage battery device, the bidirectional DC/DC conversion device, the auxiliary converter, the main converter and the traction motor.
Preferably, when the operating state of the main generator is abnormal, the auxiliary inverter includes: an auxiliary rectifier for inverting a battery-side direct-current power supply satisfying an electrical demand condition of the auxiliary converter, which is obtained by boosting a battery discharge power supply, into a third alternating-current voltage; an auxiliary transformer that boosts the third ac voltage and outputs a fourth ac voltage; and an auxiliary inverter for rectifying the fourth ac voltage into a traction-side dc power supply and supplying power to the intermediate dc circuit.
Preferably, the system further comprises: and the auxiliary generator is connected with the storage battery device and is used for providing redundancy backup guarantee for charging the storage battery device.
In another aspect, there is provided a battery power supply method for a mining electric wheel vehicle having a battery power supply system as described above, the method comprising the steps of: the method comprises the following steps: when the working state of the main generator is normal, the main converter and the auxiliary converter are both conducted, the traction motor is electrified, and meanwhile, the bidirectional DC/DC conversion device carries out voltage reduction processing on a direct-current constant-voltage power supply output by the auxiliary converter and charges a storage battery device; step two: when the working state of the main generator is abnormal, the main converter, the auxiliary converter and the bidirectional DC/DC conversion device are disconnected, and the storage battery device finishes the charging state; step three: when the working state of the main generator is abnormal and the storage battery device finishes the charging state, the storage battery device is in a discharging state, and after the bidirectional DC/DC conversion device performs voltage boosting processing on a storage battery discharging power supply, the traction motor is powered through the auxiliary converter and the main converter.
Preferably, when the main generator is in a normal operating state, the sequence of turning on each device in the battery power supply system is as follows: the main generator, the main converter, the auxiliary converter, the bidirectional DC/DC conversion device and the storage battery device.
Preferably, when the operating state of the main generator is abnormal, the start sequence of each device in the storage battery power supply system is as follows: the storage battery device, the bidirectional DC/DC conversion device, the auxiliary converter, the main converter and the traction motor.
Compared with the prior art, one or more embodiments in the above scheme can have the following advantages or beneficial effects:
the invention discloses a storage battery power supply system and method for a mining electric wheel vehicle. The system and the method utilize a main circuit topological structure suitable for the mining electric wheel vehicle, when the generator fault vehicle cannot run, the storage battery is used for boosting and the auxiliary converter is used for supplying power to a middle direct current loop of the main converter, so that power required by running is provided for a traction motor, the vehicle can slowly and nearby return to a storehouse, a station, a maintenance base, a temporary maintenance storehouse and the like, and traction of a tractor is not needed; when the auxiliary generator fails, the fault branch can be tripped, and the storage battery is charged through a loop formed by the main converter, the auxiliary converter and the bidirectional DC/DC conversion device, so that the reliability of system operation is improved. The invention has high reliability and completely meets the requirement of the electric wheel mine car on an electric driving system.
While the invention will be described in connection with certain exemplary implementations and methods of use, it will be understood by those skilled in the art that it is not intended to limit the invention to these embodiments. On the contrary, the intent is to cover all alternatives, modifications and equivalents as included within the spirit and scope of the invention as defined by the appended claims.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic overall structure diagram of a battery power supply system for a mining electric wheel vehicle according to an embodiment of the present application.
Fig. 2 is a specific structural schematic diagram of a battery power supply system for a mining electric wheel vehicle according to an embodiment of the present application.
Fig. 3 is a schematic energy transmission diagram of a storage battery power supply system for a mining electric wheel vehicle according to an embodiment of the application when a main generator is in a normal working state.
Fig. 4 is a schematic energy transmission diagram of a storage battery power supply system for a mining electric wheel vehicle according to an embodiment of the application when a main generator is abnormal in working state.
Fig. 5 is a schematic step diagram of a battery power supply method for a mining electric wheel vehicle according to an embodiment of the application.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
The mining electric wheel vehicle is a large and ultra-large vehicle using a diesel engine as a power source, and is widely applied to occasions requiring a large amount of transportation work, such as mines, large-scale building engineering, hydroelectric dam engineering, iron powder or coal yards, and the like. Because the oil consumption of the large diesel engine configured for the off-highway vehicles is remarkable, the volume of an oil tank of the off-highway vehicle is about thousands of liters to thousands of liters according to the difference of specific load tonnage, and the oil consumption is converted into millions of yuan every year. According to statistics, the transportation cost of the off-highway vehicles accounts for about 45-55% of the ore cost, and the energy consumption of the off-highway vehicles accounts for about 40-60% of the total energy consumption of the ore. The displacement of off-highway vehicles is very large, also resulting in significant emissions of atmospheric pollutants.
The mining electric wheel vehicle generates three-phase alternating current through a generator, and the three-phase alternating current is rectified and then inverted into a variable-frequency variable-voltage power supply to supply power to a traction motor. When the generator fails, the vehicle is unable to operate because traction is lost. In the prior art, when the generator breaks down, the electric drive system cannot work, so that the vehicle cannot run, and the traction vehicle needs to be arranged to pull the broken off-highway vehicle back to a warehouse, which is extremely inconvenient. In addition, the auxiliary generator is needed to charge the storage battery, and the storage battery cannot be charged after the auxiliary generator fails, so that the vehicle cannot run due to the feeding phenomenon of the storage battery.
In order to solve the technical problem, the invention provides a storage battery power supply system for a mining electric wheel vehicle. When the working state of the main generator is normal, the output power of the generator is subjected to variable frequency and variable voltage treatment by the traction converter, and then is subjected to voltage reduction treatment by the bidirectional DC/DC conversion device to charge the storage battery; when the main generator fails, the bidirectional DC/DC conversion device is utilized to boost the output power of the storage battery, and the auxiliary converter is further utilized to perform inversion, boosting and four-quadrant rectification and then output direct-current voltage to a middle direct-current loop of the traction converter for driving a motor by an inverter in the traction converter, so that the traction function of the storage battery is realized. The invention not only solves the problem that additional generator equipment is needed when the storage battery of the mine car is powered, but also can provide power for the traction motor through the storage battery under the condition that the main generator fails, thereby ensuring that the vehicle can run to the nearest overhaul warehouse without being pulled by other traction vehicles.
Fig. 1 is a schematic overall structure diagram of a battery power supply system for a mining electric wheel vehicle according to an embodiment of the present application. As shown in fig. 1, the battery power supply system according to the present invention includes, but is not limited to: a main generator 1, a traction converter 11, a traction motor 4, a bidirectional DC/DC conversion device 8 and a storage battery device 9. In particular, the battery power supply system in the embodiment of the invention is a battery power supply traction system applied to mining electric wheelers (off-highway vehicles and off-rail trains), and a main generator 1 is often adopted to supply power to the system. The input of the traction converter 11 is connected to the main generator 1 and comprises a main converter 12 and an auxiliary converter 13. Wherein, the main converter 12 is connected with the output end of the main generator 1 for outputting a plurality of groups of (single-phase) alternating current power supplies for driving the traction motor 4, the first end of the auxiliary converter 13 is connected with the middle direct current loop in the main converter, and the second end of the auxiliary converter 13 is connected with the bidirectional DC/DC conversion device 8 for outputting a direct current constant voltage power supply. And each traction motor 4 is correspondingly connected with the output end of the main converter 12, and one group of output ends correspond to one traction motor 4. After each traction motor 4 obtains a corresponding alternating current power supply, the traction motor load of the channel is driven to work, and the traction function of driving the main generator under the normal working state of the main generator is realized.
The bidirectional DC/DC converter 8 is connected to the second end of the auxiliary converter 5, and is configured to perform a function of charging the storage battery device 9 in a normal operating state of the main generator by performing a step-down process on the DC voltage obtained from the intermediate DC circuit according to the operating state of the main generator 1, and a function of pulling the storage battery device in an abnormal operating state of the main generator by performing a step-up process on the DC voltage obtained from the battery discharge output power source. The battery device 9 is connected to the bidirectional DC/DC converter 8, and is formed of a plurality of batteries in series-parallel connection as a battery pack.
In the embodiment of the present invention, the traction converter 11 is a primary and secondary integrated traction converter that is integrated with a primary converter 12 and a secondary converter 13. Further, the bidirectional DC/DC conversion device 8 adopts a bidirectional DC/DC charger.
Fig. 2 is a specific structural schematic diagram of a battery power supply system for a mining electric wheel vehicle according to an embodiment of the present application. As shown in fig. 2, in the embodiment of the present invention, the main converter 12 includes a plurality of converter units, each of which is connected to a traction motor and outputs a group of (single-phase) ac power. Since the structure and function of each converter unit in the main converter 12 are the same, only one converter unit is taken as an example for the description of the embodiment of the present invention. Wherein, the conversion unit includes: a main rectifier 2, an intermediate dc circuit connected to the rectifier, and a main inverter 3 connected to the main rectifier 2 through the intermediate dc circuit. More specifically, one end of the main rectifier 2 is connected to one set of output terminals of the main generator 1, the other end of the main rectifier 2 is connected to a first end of the main inverter 3, and the main rectifier 2 has a three-phase uncontrollable rectification structure. The main rectifier 2 is used for converting alternating current output from the main generator 1 into direct current by using a three-phase uncontrollable rectification technology and supplying power to an intermediate direct current loop; the main inverter 3 takes power from the intermediate direct-current loop, inverts the direct current acquired by the intermediate direct-current loop into alternating current with adjustable frequency and amplitude, and outputs a group of single-phase alternating-current power supplies. The intermediate dc circuit is connected to the main rectifier 2, the main inverter 3, and the auxiliary converter 13 in each converter unit.
As shown in fig. 2, in the embodiment of the present application, the main converter 12 includes two sets of current converting units, and the main converter 12 outputs two single-phase ac power sources for driving the motor to operate. It should be noted that the number of converter units is not specifically limited in the present invention, and those skilled in the art can adjust the number of output groups of the traction converter and the number of traction motors according to the difference in the number of converter units.
In a battery power supply traction system in the field of electric traction rail vehicles, an auxiliary converter which performs inversion treatment and then voltage reduction treatment is usually adopted to directly supply power to a battery device. However, for the mining electric wheel vehicle, when the diesel engine is adopted to drive the main generator to generate electricity, the voltage fluctuation of the intermediate direct current loop is large, and the auxiliary transformation mode only has inversion and voltage reduction processing, and cannot meet the voltage stabilization requirement of the off-highway vehicle. Therefore, in the present embodiment, the auxiliary inverter 13 includes the auxiliary inverter 5, the auxiliary transformer 6, and the auxiliary rectifier 7 connected in this order. Preferably, the bidirectional DC/DC conversion device 8 is integrated in the auxiliary converter 13, so that the auxiliary inverter 13 in the embodiment of the present invention, on one hand, provides a stable constant voltage to the storage battery device 9/the intermediate DC circuit by integrating the inversion, buck/boost, rectification, buck/boost processing functions; in addition, the voltage boosting, inverting, voltage boosting and rectifying functions are integrated, and stable constant voltage is provided for the intermediate direct current loop.
In the battery power supply system according to the present invention, it is necessary to satisfy the normal operation of the traction motor of the vehicle in the power supply abnormal state caused by the normal power supply state and the failure state of the main generator, and the operation of the system in these two states will be described in detail below.
Fig. 3 is a schematic energy transmission diagram of a storage battery power supply system for a mining electric wheel vehicle according to an embodiment of the application when a main generator is in a normal working state. As shown in fig. 3, when the power supply state of the main generator 1 is normal, the main converter 12, the auxiliary converter 13, and the bidirectional DC/DC converter 8 are all in the normal on state, and the battery device 9 enters the charging state. At this moment, the electric energy flow direction of the storage battery power supply system is as follows in sequence: a main generator 1, a main converter 12, an auxiliary converter 13, a bidirectional DC/DC conversion device 8 and a storage battery device 9.
Specifically, the alternating current output by the main generator 1, the main and auxiliary integrated traction converter 11 gets power from the main generator 1, and an intermediate direct current voltage is established through the four-quadrant rectifier 2 in the traction converter 11 (the main converter 12), on one hand, the traction inverter 3 gets power from an intermediate direct current loop, and drives the traction motor 4 to complete traction; meanwhile, the auxiliary converter 13 also takes power from the intermediate direct current loop, and outputs stable constant voltage to charge the storage battery through inversion, alternating current voltage reduction of the auxiliary transformer 6, rectification and direct current voltage reduction of the bidirectional DC/DC conversion device 8.
The implementation of the auxiliary converter 13 under the normal operation condition of the current main generator will be described. In particular, the auxiliary inverter 5 is connected to an intermediate dc circuit in the main converter 12 for inverting the voltage taken from the intermediate dc circuit into a corresponding first ac voltage; the auxiliary transformer 6 is positioned between the auxiliary inverter 5 and the auxiliary rectifier 7 and used for performing alternating current voltage reduction processing on the acquired first alternating current voltage and outputting a second alternating current voltage; the auxiliary rectifier 7 is connected to the bidirectional DC/DC conversion device 8, and is configured to rectify the second ac voltage into a DC constant voltage power supply that meets the electrical requirement of the bidirectional DC/DC conversion device 8 by using an internal four-quadrant rectification structure and using a three-phase uncontrollable rectification technique. In this way, the current DC constant voltage power supply is subjected to DC voltage reduction processing by the bidirectional DC/DC conversion device 8, and then is input into the storage battery device 9 to charge the storage battery device.
Furthermore, in the embodiment of the present invention, the input end of the main inverter 3 of each converter unit in the traction converter 11 is provided with a plurality of filter capacitor banks connected in parallel, so as to form a corresponding filter loop and an energy storage branch, so that the intermediate dc loop voltage obtained by the main inverter 3 is a stable dc power supply filtered by the capacitor banks, and is further inverted into a stable single-phase ac power to be output to the corresponding traction motor 4.
Thus, as shown in FIG. 3, when the traction condition is charging the battery: the alternating current output by the main generator 1 is converted into direct current through the main rectifier 2. Because the capacitor banks are packaged in the two main inverters 3, the four capacitors are connected in parallel to form a filter loop and an energy storage branch circuit, stable direct current is obtained after the filtering of the capacitors, and is inverted into single-phase alternating current after passing through the main inverters 3 and is output to the traction motor to drive the traction motor 4. At this time, the DC side voltage (intermediate DC loop voltage) is inverted into ac by the auxiliary inverter 5, and then ac voltage is reduced by the auxiliary transformer 6, rectified into low voltage by the auxiliary rectifier 7, and then reduced by DC voltage by the DC-DC charger 8 to charge the battery 9.
Fig. 4 is a schematic energy transmission diagram of a storage battery power supply system for a mining electric wheel vehicle according to an embodiment of the application when a main generator is abnormal in working state. As shown in fig. 4, when the power supply state of the main generator 1 is abnormal, the main converter 12, the auxiliary converter 13, and the bidirectional DC/DC converter 8 are all in the off state, and the battery device 9 enters the discharge state. At this moment, the electric energy flow direction of the storage battery power supply system is as follows in sequence: the system comprises a storage battery device 9, a bidirectional DC/DC conversion device 8, an auxiliary converter 13, a main converter 12 and a traction motor 4.
Specifically, when the power supply state of the main generator 1 is abnormal (the main generator 1 fails), the storage battery device 9 is in a discharge state, the bidirectional DC/DC conversion device 8 performs DC boosting processing on a discharge power source acquired from the storage battery device 9, and supplies power to an intermediate DC loop of the traction converter 11 after inversion, ac boosting and rectification processing by the auxiliary converter 13, and further, the main inverter 3 in the main converter 12 drives the traction motor 4, thereby realizing the storage battery traction function.
The following describes the implementation process of the auxiliary converter 13 under the abnormal working condition of the current main generator. Specifically, when the storage battery device 9 is in a discharge state, the bidirectional DC/DC conversion device 8 performs DC boosting processing on the acquired discharge power supply, and inputs the DC boosted power supply into the auxiliary rectifier 7. The auxiliary rectifier 7 is connected to the bidirectional DC/DC conversion device 8, and is configured to invert the battery discharge power supply (battery-side DC power supply that satisfies the electrical demand condition of the auxiliary converter 7) subjected to the DC boost processing into a third ac voltage. The auxiliary transformer 6 is configured to output a fourth alternating voltage after performing alternating current boosting processing on the acquired third alternating voltage. The auxiliary inverter 5 is configured to rectify the acquired fourth ac voltage into a traction-side dc power supply, and supply power to the intermediate dc circuit. Thus, the current traction side direct current power supply is input into the traction motor 4 after being subjected to the inversion processing of the main inverter 3, and is used for driving the traction motor 4 to normally work.
As shown in fig. 4, when the generator fails, the working condition that the storage battery supplies power to the traction motor is entered: the discharging power supply output by the storage battery 9 is boosted to low voltage by the DC-DC charger 8, inverted to single-phase alternating current by the auxiliary rectifier 7, boosted by the auxiliary transformer 6, rectified to high-voltage direct current by the auxiliary inverter 5, and supplied to the traction motor 4 by the main inverter 3, so that the electric wheel vehicle is driven to slowly enter the warehouse.
In the practical application process, in order to improve the guarantee of charging the storage battery in the normal running process of the mining electric-wheel vehicle, the embodiment of the invention has two modes aiming at the storage battery charging process, and the two modes are mutually redundant and backup. Thus, as shown in fig. 2, the battery power supply system according to the present invention further includes: assisting the generator 10. The auxiliary generator 10 is connected to the accumulator unit 9 and is used to provide a redundant backup safeguard for the charging process of the accumulator unit 9. Specifically, when the auxiliary generator 10 fails, the storage battery device 9 can be charged through the bidirectional DC/DC conversion device 8, when the bidirectional DC/DC conversion device 8 fails, the storage battery device 9 can be charged through the auxiliary generator 10, and the two modes mutually guarantee each other, so that the reliability of the operation of the storage battery power supply system of the mining electric wheel vehicle is improved.
More specifically, as shown in fig. 2, the battery power supply system according to the embodiment of the present invention further includes: a first switching unit 14 and a second switching unit 15. Both ends of the first switching unit (KM1)14 are connected to the bidirectional DC/DC converter 8 and the battery device 9, respectively. The second switching unit (KM2)15 is connected at both ends to the auxiliary generator 10 and the battery device 9, respectively. The first switching unit (KM1)14 is intended to be closed in case of a failure of the auxiliary generator 10. Meanwhile, the second switching unit (KM2)15 is in an open state when the auxiliary generator 10 fails.
With continued reference to fig. 2, the second switching unit (KM2)15 is adapted to be closed in case of a failure of the bidirectional DC/DC converting device 8. Meanwhile, the first switching unit (KM1)14 is configured to be in an open state when the bidirectional DC/DC conversion apparatus 8 fails. Thus, the present invention utilizes the auxiliary generator 10 to provide a powerful backup for the battery charging process for the battery power supply system.
In addition, the first switching unit (KM1)14 is configured to be in a closed state when the bidirectional DC/DC conversion apparatus 8 is in a normal operation state. Meanwhile, the second switching unit (KM2)15 is configured to be in an off state when the bidirectional DC/DC conversion apparatus 8 is in a normal operation state. Therefore, when the mining electric wheel vehicle normally runs, the auxiliary generator 10 is not needed to be used for charging the storage battery device 9, and the energy consumption of the vehicle is reduced.
Further, referring to fig. 2, 3 and 4, the auxiliary generator 10 and the DC-DC charger 8 are in a redundant backup mode, and when the auxiliary generator 10 fails, the KM2 is tripped off, the KM1 is closed, and the storage battery is charged through DC-DC; when the auxiliary variable DC-DC charger 8 fails, the KM1 is tripped off and the KM2 is attracted, and the storage battery is charged through the auxiliary generator.
On the other hand, based on the storage battery power supply system for the mining electric wheel vehicle, the invention also provides a storage battery power supply method for the mining electric wheel vehicle. The mining electric wheel vehicle is provided with the storage battery power supply system.
Fig. 5 is a schematic step diagram of a battery power supply method for a mining electric wheel vehicle according to an embodiment of the application. As shown in fig. 5, the method for supplying power to a storage battery according to the present invention includes the following steps: step S510, when the working state of the main generator 1 is normal, turning on the main converter 12, the auxiliary converter 13, and the bidirectional DC/DC conversion device 8, and powering on the traction motor 4, and simultaneously, performing voltage reduction processing on the direct-current constant-voltage power supply output by the auxiliary converter 13 by the bidirectional DC/DC conversion device 8, and charging the storage battery device 9; step S520, when the operating state of the main generator 1 is abnormal, disconnecting the main converter 12, the auxiliary converter 13, and the bidirectional DC/DC conversion device 8, and ending the charging state of the storage battery device 9; in step S530, when the operating state of the main generator 1 is abnormal and the battery device 9 is in the charged state, the battery device 9 is in the discharged state, and the bidirectional DC/DC converter 8 boosts the battery discharge power and then powers the traction motor 4 via the auxiliary converter 13 and the main converter 12.
Further, when the main generator 1 is in a normal working state, the turn-on sequence of each device in the storage battery power supply system is as follows: a main generator 1, a main converter 12, an auxiliary converter 13, a bidirectional DC/DC conversion device 8 and a battery device 9.
Further, when the working state of the main generator 1 is abnormal, the starting sequence of each device in the storage battery power supply system is as follows: a storage battery device 9, a bidirectional DC/DC conversion device 8, an auxiliary converter 13, a main converter 12 and a traction motor 4.
The invention provides a storage battery power supply system and method for a mining electric wheel vehicle. The system and the method utilize a main circuit topological structure suitable for the mining electric wheel vehicle, when the generator fault vehicle cannot run, the storage battery is used for boosting and the auxiliary converter is used for supplying power to a middle direct current loop of the main converter, so that power required by running is provided for a traction motor, the vehicle can slowly and nearby return to a storehouse, a station, a maintenance base, a temporary maintenance storehouse and the like, and traction of a tractor is not needed; when the auxiliary generator fails, the fault branch can be tripped, and the storage battery is charged through a loop formed by the main converter, the auxiliary converter and the bidirectional DC/DC conversion device, so that the reliability of system operation is improved. The invention has high reliability and completely meets the requirement of the electric wheel mine car on an electric driving system.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
It is to be understood that the disclosed embodiments of the invention are not limited to the particular structures, process steps, or materials disclosed herein but are extended to equivalents thereof as would be understood by those ordinarily skilled in the relevant arts. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting.
Reference in the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Thus, the appearances of the phrase "one embodiment" or "an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment.
Although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A battery power supply system for a mining electric wheel vehicle, the system comprising:
a main generator;
the traction converter comprises a main converter and an auxiliary converter, wherein the input end of the main converter is connected with the main generator and is used for outputting a plurality of groups of alternating current power supplies for driving a traction motor, and the first end of the auxiliary converter is connected with a middle direct current loop in the main converter and is used for outputting a direct current constant voltage power supply;
the traction motor is connected with the output end of the main converter;
a bidirectional DC/DC conversion device connected to a second end of the auxiliary converter, for charging a battery device/performing a traction function of the battery device through a buck/boost process according to an operating state of the main generator;
the storage battery device is connected with the bidirectional DC/DC conversion device.
2. The battery power supply system according to claim 1,
the traction converter adopts a main and auxiliary integrated traction converter integrated with the main converter and the auxiliary converter;
the bidirectional DC/DC conversion device adopts a bidirectional DC/DC charger.
3. The secondary battery power supply system according to claim 1 or 2, wherein said secondary battery means enters a state of charge when said main generator is in a normal operating state, and further,
the electric energy flow direction of the storage battery power supply system is as follows: the main generator, the main converter, the auxiliary converter, the bidirectional DC/DC conversion device and the storage battery device.
4. A battery power supply system according to claim 3, wherein, when the main generator is operating normally, the auxiliary inverter comprises:
an auxiliary inverter connected to an intermediate dc circuit in the main converter, for inverting a voltage obtained by the intermediate dc circuit to a corresponding first ac voltage;
an auxiliary transformer which is positioned between the auxiliary inverter and the auxiliary rectifier, and outputs a second alternating voltage after the first alternating voltage is subjected to voltage reduction processing;
the auxiliary rectifier rectifies the second alternating-current voltage into the direct-current constant-voltage power supply that satisfies an electrical demand condition of the bidirectional DC/DC conversion device.
5. A battery power supply system according to any one of claims 1 to 4, wherein said battery device enters a discharge state when said main generator is in an abnormal operating state, and further,
the electric energy flow direction of the storage battery power supply system is as follows: the storage battery device, the bidirectional DC/DC conversion device, the auxiliary converter, the main converter and the traction motor.
6. The battery power supply system according to claim 5, wherein the auxiliary inverter, when the main generator is in an abnormal operating state, includes:
an auxiliary rectifier for inverting a battery-side direct-current power supply satisfying an electrical demand condition of the auxiliary converter, which is obtained by boosting a battery discharge power supply, into a third alternating-current voltage;
an auxiliary transformer that boosts the third ac voltage and outputs a fourth ac voltage;
and an auxiliary inverter for rectifying the fourth ac voltage into a traction-side dc power supply and supplying power to the intermediate dc circuit.
7. A battery power supply system according to any of claims 1 to 6, characterized in that the system further comprises:
and the auxiliary generator is connected with the storage battery device and is used for providing redundancy backup guarantee for charging the storage battery device.
8. A battery power supply method for an electric wheel vehicle for mining, characterized in that the electric wheel vehicle for mining has a battery power supply system according to any one of claims 1 to 7, the method comprising the steps of:
the method comprises the following steps: when the working state of the main generator is normal, the main converter and the auxiliary converter are both conducted, the traction motor is electrified, and meanwhile, the bidirectional DC/DC conversion device carries out voltage reduction processing on a direct-current constant-voltage power supply output by the auxiliary converter and charges a storage battery device;
step two: when the working state of the main generator is abnormal, the main converter, the auxiliary converter and the bidirectional DC/DC conversion device are disconnected, and the storage battery device finishes the charging state;
step three: when the working state of the main generator is abnormal and the storage battery device finishes the charging state, the storage battery device is in a discharging state, and after the bidirectional DC/DC conversion device performs voltage boosting processing on a storage battery discharging power supply, the traction motor is powered through the auxiliary converter and the main converter.
9. The battery power supply method according to claim 8,
when the working state of the main generator is normal, the starting sequence of each device in the storage battery power supply system is as follows: the main generator, the main converter, the auxiliary converter, the bidirectional DC/DC conversion device and the storage battery device.
10. The battery power supply method according to claim 8 or 9,
when the working state of the main generator is abnormal, the starting sequence of each device in the storage battery power supply system is as follows: the storage battery device, the bidirectional DC/DC conversion device, the auxiliary converter, the main converter and the traction motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010349921.4A CN113562004A (en) | 2020-04-28 | 2020-04-28 | Storage battery power supply system and method for mining electric wheel vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010349921.4A CN113562004A (en) | 2020-04-28 | 2020-04-28 | Storage battery power supply system and method for mining electric wheel vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113562004A true CN113562004A (en) | 2021-10-29 |
Family
ID=78158065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010349921.4A Pending CN113562004A (en) | 2020-04-28 | 2020-04-28 | Storage battery power supply system and method for mining electric wheel vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113562004A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2816383C1 (en) * | 2023-08-16 | 2024-03-28 | Акционерное общество "ТРАНСМАШХОЛДИНГ" | Vehicle electric traction system with energy accumulator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016086458A1 (en) * | 2014-12-02 | 2016-06-09 | 永济新时速电机电器有限责任公司 | Motor train unit rescue returning device |
| WO2017076161A1 (en) * | 2015-11-04 | 2017-05-11 | 株洲中车时代电气股份有限公司 | Motor train unit traction system and energy control method |
| WO2017210858A1 (en) * | 2016-06-07 | 2017-12-14 | 吉林大学 | Traction power supply system for high-speed rail and on-board power storage and discharge system |
| CN109383307A (en) * | 2017-08-02 | 2019-02-26 | 株洲中车时代电气股份有限公司 | Storage battery power supply trailer system for electric transmission traction track vehicular traffic |
| CN109428496A (en) * | 2017-08-22 | 2019-03-05 | 株洲中车时代电气股份有限公司 | A kind of current transformer and Electric Motor Wheel mine vehicle power supply system |
| CN109450285A (en) * | 2018-11-01 | 2019-03-08 | 北京交通大学 | The major-minor model of integration energy in bidirectional flow auxiliary power supply system of rail traffic vehicles |
-
2020
- 2020-04-28 CN CN202010349921.4A patent/CN113562004A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016086458A1 (en) * | 2014-12-02 | 2016-06-09 | 永济新时速电机电器有限责任公司 | Motor train unit rescue returning device |
| WO2017076161A1 (en) * | 2015-11-04 | 2017-05-11 | 株洲中车时代电气股份有限公司 | Motor train unit traction system and energy control method |
| WO2017210858A1 (en) * | 2016-06-07 | 2017-12-14 | 吉林大学 | Traction power supply system for high-speed rail and on-board power storage and discharge system |
| CN109383307A (en) * | 2017-08-02 | 2019-02-26 | 株洲中车时代电气股份有限公司 | Storage battery power supply trailer system for electric transmission traction track vehicular traffic |
| CN109428496A (en) * | 2017-08-22 | 2019-03-05 | 株洲中车时代电气股份有限公司 | A kind of current transformer and Electric Motor Wheel mine vehicle power supply system |
| CN109450285A (en) * | 2018-11-01 | 2019-03-08 | 北京交通大学 | The major-minor model of integration energy in bidirectional flow auxiliary power supply system of rail traffic vehicles |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2816383C1 (en) * | 2023-08-16 | 2024-03-28 | Акционерное общество "ТРАНСМАШХОЛДИНГ" | Vehicle electric traction system with energy accumulator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109383307B (en) | Battery-powered traction system for an electric traction rail transit vehicle | |
| US20200180446A1 (en) | Apparatus for energy transfer using converter and method of manufacturing same | |
| EP3705336A1 (en) | Rail traffic hybrid power circuit, energy storage power pack, and power supply method therefor | |
| JP2012105524A (en) | Apparatus for transferring energy using onboard power electronic circuit with high-frequency transformer isolation and method of manufacturing the same | |
| CN103350647A (en) | Motor train unit traction system adopting catenary and energy storing devices for hybrid power supply | |
| CN114590140A (en) | Charge-discharge management system of electric automobile | |
| CN107554299B (en) | Hybrid power source system of railway engineering machinery | |
| WO2022257939A1 (en) | Hybrid power system for mining dump truck | |
| CN101593985A (en) | A kind of charging device of self power generation | |
| CN106183875A (en) | A kind of electric automobile high-voltage electrical architecture system of discharge and recharge integration | |
| RU2612075C1 (en) | Locomotive traction converter | |
| WO2023050517A1 (en) | Energy storage traction system and control method therefor, and rail transit vehicle | |
| KR20140132567A (en) | Hybrid electric vehicles high-voltage battery charging device | |
| CN113562004A (en) | Storage battery power supply system and method for mining electric wheel vehicle | |
| CN112039174A (en) | Centralized charging station circuit topology based on direct-current bus power supply and implementation method | |
| CN203589818U (en) | Uninterrupted power supply system for operation of smart vehicle-mounted substation | |
| CN205168221U (en) | Parallel energy supply system and vehicle | |
| CN216819407U (en) | New energy power generation vehicle | |
| CN212649169U (en) | Vehicle-mounted inverter and electric power rescue vehicle | |
| CN205168219U (en) | Serial -type energy supply system and vehicle | |
| Rassõlkin et al. | Power quality application of hybrid drivetrain | |
| CN117246176A (en) | Ground charging system for power battery of double-power-source electric locomotive | |
| TWI634025B (en) | Vehicle oil/electric hybrid power supply system | |
| CN115503510A (en) | Electric locomotive and power supply device and method thereof | |
| CN112553987A (en) | Novel hybrid subway rail grinding wagon |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211029 |
|
| RJ01 | Rejection of invention patent application after publication |