CN109861367B - Power supply system of electric locomotive - Google Patents
Power supply system of electric locomotive Download PDFInfo
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- CN109861367B CN109861367B CN201711237664.XA CN201711237664A CN109861367B CN 109861367 B CN109861367 B CN 109861367B CN 201711237664 A CN201711237664 A CN 201711237664A CN 109861367 B CN109861367 B CN 109861367B
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
An electric locomotive power supply system, comprising: an energy storage device; the direct current power supply circuit is used for transforming direct current transmitted by the energy storage device; the alternating current power supply circuit is used for rectifying alternating current transmitted by the traction transformer to obtain corresponding direct current; an intermediate DC circuit; the traction inverter circuit is used for converting the direct current transmitted by the intermediate direct current circuit into corresponding alternating current and transmitting the alternating current to a traction motor connected with the traction inverter circuit; the auxiliary inverter circuit is used for converting the direct current transmitted by the intermediate direct current circuit into corresponding alternating current; when the electric locomotive is in the phase separation area, the direct current power supply circuit is in a working state, and the alternating current power supply circuit is in a non-working state. The rail grinding engineering vehicle can supply power to the grinding operation system by the energy storage device when passing through the neutral section, is more environment-friendly and energy-saving, and does not need to frequently start a diesel engine before and after passing through the neutral section like the existing diesel engine power supply mode.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a power supply system of an electric locomotive, and particularly relates to a power supply system of a rail grinding engineering truck.
Background
The existing high-speed rail grinding engineering vehicle mainly adopts a passive grinding mode to grind the rail, grinding equipment is not provided with a driving motor, but the high running speed of the engineering vehicle is kept to realize the grinding operation of the rail by utilizing the friction between the grinding equipment and the rail.
For the existing high-speed rail grinding engineering vehicle, when the rail passing through a neutral section where the contact network is not powered is ground, in order to guarantee the continuous power supply of a traction system and a grinding operation system of the engineering vehicle, the engineering vehicle needs to maintain the power supply requirement by adopting a mode of supplying power to an auxiliary system by electric braking. However, there are many drawbacks to this approach. For example, the power supply of such a power supply method is small, and cannot meet the power consumption requirements of the traction system and the grinding work control system. The power supply mode adopts the electric energy generated in the braking process, so that the speed of the engineering truck is quickly reduced, and the speed requirement of the passive grinding cannot be met by the speed of the locomotive.
Disclosure of Invention
In order to solve the above problem, the present invention provides a power supply system for an electric locomotive, the power supply system comprising:
an energy storage device;
the direct current power supply circuit is connected with the energy storage device and is used for transforming direct current transmitted by the energy storage device;
the alternating current power supply circuit is connected with the traction transformer and used for rectifying alternating current transmitted by the traction transformer to obtain corresponding direct current;
an intermediate dc circuit connected to the dc power supply circuit and the ac power supply circuit;
the traction inverter circuit is connected with the intermediate direct current circuit and is used for converting direct current transmitted by the intermediate direct current circuit into corresponding alternating current and transmitting the alternating current to a traction motor connected with the traction inverter circuit so as to drive the traction motor to operate;
the auxiliary inverter circuit is connected with the intermediate direct-current circuit and is used for converting direct current transmitted by the intermediate direct-current circuit into corresponding alternating current;
when the electric locomotive is in the phase separation area, the direct current power supply circuit is in a working state, and the alternating current power supply circuit is in a non-working state.
According to an embodiment of the present invention, the dc power supply circuit includes:
a first pre-charge circuit connected with the energy storage device;
and the direct current transformation circuit is connected with the first pre-charging circuit and the intermediate direct current circuit and is used for boosting or reducing the voltage of the electric energy transmitted by the first pre-charging circuit or the intermediate direct current circuit.
According to one embodiment of the invention, the dc transformer circuit comprises a BOOST circuit.
According to an embodiment of the present invention, the ac power supply circuit includes:
a second pre-charge circuit for connection with the traction transformer;
and the rectifying circuit is connected with the second pre-charging circuit and the intermediate direct current circuit and is used for rectifying the alternating current transmitted by the second pre-charging circuit or inverting the direct current transmitted by the intermediate direct current circuit.
According to an embodiment of the invention, the power supply system further comprises:
and the power supply control circuit is connected with the direct current power supply circuit and the alternating current power supply circuit and is used for controlling the running states of the direct current power supply circuit and the alternating current power supply circuit.
According to an embodiment of the invention, the power supply control circuit is configured to, upon receiving a phase-incoming signal, block the ac power supply circuit to render the ac power supply circuit inoperative and activate the dc power supply circuit to render the dc power supply circuit operative, such that the energy storage device provides electrical energy to the intermediate dc circuit via the dc power supply circuit.
According to an embodiment of the present invention, when a phase-incoming signal is received, the power supply control circuit is configured to activate the dc power supply circuit to make the dc power supply circuit convert the voltage of the dc power transmitted by the energy storage system into a preset voltage, and then block the ac power supply circuit to make the ac power supply circuit in a non-operating state, wherein the preset voltage is less than or equal to an output voltage of the ac power supply circuit in an operating state.
According to an embodiment of the present invention, when a phase-incoming signal is received, the output power of the ac power supply circuit is gradually decreased, and when the output power is decreased to a preset power threshold, the power supply control circuit is configured to start the dc power supply circuit so that the dc power supply circuit converts the voltage of the dc power transmitted by the energy storage system into a preset voltage, and block the ac power supply circuit so that the ac power supply circuit is in a non-operating state.
According to an embodiment of the present invention, the power supply control circuit is configured to activate the ac power supply circuit to enable the ac power supply circuit to be in an operating state when receiving the phase-out signal, so that the dc power supply circuit receives the electric energy provided by the traction transformer.
According to an embodiment of the present invention, the power supply control circuit is configured to, when receiving a phase-splitting area signal, start the dc power supply circuit to enable the dc power supply circuit to be in a working state, so that the dc power supply circuit performs voltage conversion on the dc power transmitted by the intermediate dc circuit and transmits the converted dc power to the energy storage device, thereby charging the energy storage device.
The invention also provides a steel rail grinding engineering vehicle which comprises the power supply system.
The power supply system provided by the invention can enable the rail grinding engineering vehicle to adopt the energy storage device (such as a super capacitor and the like) to supply power to the grinding operation system when passing through the neutral section, compared with the existing power supply mode, the mode is more environment-friendly and energy-saving, and the diesel engine does not need to be frequently started before and after passing through the neutral section like the existing diesel engine power supply mode.
Meanwhile, the power supply system realizes the double-power seamless switching of the energy storage device and the contact network, so that the operating characteristic requirements of the high-speed rail grinding wagon can be met, and the engineering wagon can perform double-power seamless switching and continuous operation in a non-electricity area (namely a phase separation area) and an electricity area of the contact network.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by 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
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required in the description of the embodiments or the prior art:
FIG. 1 is a schematic diagram of an electric locomotive power supply system according to one embodiment of the present invention;
FIG. 2 is a schematic illustration of a rail grinding wagon passing through a neutral zone according to one embodiment of the present invention;
FIG. 3 is a schematic diagram of a switching sequence of a power supply system through a phase-splitting zone according to an embodiment of the invention.
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.
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details or with other methods described herein.
In order to avoid too fast speed attenuation of the high-speed rail grinding engineering truck in the neutral section passing area, the power supply system can be provided with an independent power supply to enable the engineering truck not to brake in the neutral section passing area. At present, high-speed steel rail grinding vehicles are powered by diesel engines, however, the diesel engines are not environment-friendly and energy-saving, have high noise, need frequent starting and stopping, are complex to operate and the like.
Aiming at the problems in the prior art, the invention provides a novel power supply system of an electric locomotive and a rail grinding engineering truck applying the power supply system.
Fig. 1 shows a schematic structural diagram of a power supply system of a rail grinding engineering vehicle provided in this embodiment.
As shown in fig. 1, the power supply system provided by the present embodiment preferably includes: the system comprises an energy storage device 101, a direct current supply circuit 102, an alternating current supply circuit 105, an intermediate direct current circuit 103, a traction inverter circuit 106 and an auxiliary inverter circuit 107. The energy storage device 101 is connected to the dc power supply circuit 102, and is capable of transferring the electric energy stored in the energy storage device to the dc power supply circuit 102. Meanwhile, the energy storage device 101 can also receive and store the electric energy transmitted by the dc power supply circuit 102, if necessary.
In this embodiment, the energy storage device 101 is preferably implemented by a super capacitor. Of course, in other embodiments of the present invention, the energy storage device 101 may be implemented by using other reasonable circuits or devices (such as a battery) according to actual needs, and the present invention is not limited thereto.
The dc power supply circuit 102 is connected to the energy storage device 101, and is capable of transforming the dc power transmitted from the energy storage device 101. Specifically, as shown in fig. 1, in the present embodiment, the dc power supply device 102 preferably includes: a first precharge circuit 102a and a dc transformer circuit 102 b. The first pre-charging circuit 102a is connected between the energy storage device 101 and the dc transformer circuit 102b, and includes a first controllable switch K1, a second controllable switch K2, and a first resistor R1, wherein a circuit formed by connecting the first controllable switch K1 and the first resistor R1 in series is connected in parallel with the second controllable switch K2. One end of the second controllable switch is connected to the tank circuit 101, and the other end is connected to the dc transformer circuit 102 b.
The dc transformer circuit 102b can boost the dc power transmitted from the precharge circuit 102a and transmit the boosted dc power to the intermediate dc circuit 103 connected thereto. Meanwhile, when the energy storage device 101 needs to be charged, the dc transformer circuit 102b can also step down the dc power transmitted by the intermediate dc circuit 103, and transmit the stepped-down dc power to the energy storage device 101 through the pre-charging circuit 102a, so as to charge the energy storage device 101.
Specifically, as shown in fig. 1, in the present embodiment, the dc transformer circuit 102b preferably includes a BOOST circuit. The BOOST circuit preferably includes an inductor and a rectification module, wherein the rectification module is implemented by using a four-quadrant rectification circuit. Correspondingly, in the embodiment, the BOOST circuit includes two inductors (i.e., the first inductor L1 and the second inductor L2), the first inductor L1 is connected to two rectifying branches of the four-quadrant rectifying circuit, and the second inductor L2 is connected to the other two rectifying branches of the four-quadrant rectifying circuit. The inductor and the four-quadrant rectifier circuit can cooperatively boost and convert the direct current transmitted by the pre-charge circuit 102a, and transmit the converted direct current with higher voltage to the intermediate direct current circuit 103 connected thereto.
The ac power supply circuit 105 is connected between the traction transformer 104 and the intermediate dc circuit 103, and since the traction transformer 104 is connected to the overhead line system, the ac power supply circuit 105 can also convert the ac power provided by the overhead line system into corresponding dc power and transmit the dc power to the intermediate dc circuit.
Specifically, in the present embodiment, the ac power supply circuit preferably includes a second precharge circuit and a rectification circuit. The second pre-charge circuit is connected between the traction transformer 104 and the rectifying circuit, and the circuit structure thereof is the same as that of the first pre-charge circuit 102a, so the related content of the second pre-charge circuit is not described herein again.
In this embodiment, the rectifying circuit is preferably implemented by a four-quadrant rectifying circuit. Since the dc transformer circuit 102b can also use the four-quadrant rectifier module to implement voltage conversion, for the power supply system provided in this embodiment, because part of the circuit structures in the dc power supply circuit 102 and the ac power supply circuit 105 can be shared, the device types of the power supply system can be effectively reduced, which is helpful for improving the universality of the circuit and related devices, and facilitating the subsequent circuit installation and maintenance.
It should be noted that in other embodiments of the present invention, the dc power supply circuit 102 and/or the ac power supply circuit 105 may be implemented by other reasonable devices or circuits according to actual needs, and the present invention is not limited thereto.
As shown in fig. 1, the power supply system provided in this embodiment further includes an auxiliary inverter circuit 106 and a traction inverter circuit 108. Since the motor vehicle is a rail grinding vehicle, the auxiliary inverter circuit 106 is connected to the grinding operation system 107, and is capable of performing dc-ac conversion on the dc power provided by the intermediate dc circuit 103 and transmitting the ac power obtained by the conversion to the grinding operation system 107 connected thereto, thereby driving the grinding operation system 107 to operate to realize the rail grinding operation.
In this embodiment, the auxiliary inverter circuit 106 preferably performs CVCF inversion on the dc power transmitted by the intermediate dc circuit 103, and outputs a three-phase ac SPWM power output with a fixed voltage and a fixed frequency. After the three-phase alternating current SPWM power output by the auxiliary inverter circuit 106 is subjected to isolation and voltage transformation filtering by a relevant external circuit, the auxiliary power can be provided for the whole vehicle.
The traction inverter circuit 108 is connected between the intermediate direct current circuit 103 and the traction circuit 109, and is capable of performing direct-to-alternating conversion on direct current provided by the intermediate direct current circuit 103, and transmitting alternating current obtained by the conversion to the traction motor 109 connected with the traction motor to drive the traction motor 109 to run, so as to drive the rail grinding engineering vehicle to run.
In this embodiment, the traction inverter circuit 108 preferably performs VVVF inversion on the dc power transmitted by the intermediate dc circuit 103, so as to provide a driving power source for the front/rear bogie traction motors of the rail grinding engineering vehicle.
As shown in fig. 1, the power supply system of the rail grinding engineering vehicle provided in this embodiment further includes a power supply control circuit 110. The power supply control circuit 110 is connected to the dc power supply circuit 102 and the ac power supply circuit 105, and can control the operation states of the dc power supply circuit 102 and the ac power supply circuit 105.
In order to more clearly illustrate the working principle and the working process of the power supply system of the rail grinding engineering vehicle passing through the embodiment, the power supply system is further described below with reference to the schematic diagram of the neutral section of the rail grinding engineering vehicle shown in fig. 2.
As shown in fig. 2, in the present embodiment, two ground sensors (i.e., a first ground sensor G1 and a second ground sensor G2) are located before each phase separation (i.e., no-electricity) along the track. Wherein the first ground sensor G1 is disposed at the left side (i.e., the side far from the dead zone), and the second ground sensor G2 is disposed at the right side (i.e., the side near the dead zone). Similarly, at the end of each phase separation, two ground sensors (i.e., a third ground sensor G3 and a fourth ground sensor G4) are also provided, wherein the third ground sensor G3 is provided on the left side (i.e., the side closer to the dead zone) and the fourth ground sensor is provided on the right side (i.e., the side farther from the dead zone).
When the locomotive passes through the phase separation zone from left to right, the power supply control circuit 110 first receives the phase separation zone entering signal transmitted by the first ground sensor G1. In this embodiment, after receiving the phase-locked signal, the power supply control circuit 110 locks the ac power supply circuit 105 in the power supply system to make the ac power supply circuit 105 in a non-operating state. The power supply control circuit 110 also activates the dc power supply circuit 102, so that the dc power supply circuit 102 is in an operating state. The electric energy received by the intermediate dc circuit 103 is also the dc power transmitted by the dc power supply circuit 102, which is obtained by boosting the dc power provided by the energy storage device 101.
Specifically, since the power around the wheel of the locomotive is larger when the locomotive is powered by the catenary, and the energy storage device 101 may not be able to provide the larger power around the wheel due to the limitation of the capacity, in this embodiment, the output power of the ac power supply circuit 105 is gradually reduced (for example, the power is reduced to 323.3kW) after the phase-splitting signal is received. In this embodiment, the locomotive network control system may derate the locomotive tractive effort with a variable slope, such that the output power of the ac power supply circuit 105 may also decrease as the power of the wheelset tractive effort decreases.
In this embodiment, when the output power of the ac power supply circuit 105 is reduced to the preset power threshold (the specific value of the preset power threshold may be configured to be different reasonable values according to actual needs, and the present invention does not limit the specific value), the power supply control circuit 110 will start the dc power supply circuit 102 and block the ac power supply circuit 105. When the dc power supply circuit 102 is activated, it can boost the dc power transmitted from the energy storage device 102 to a predetermined voltage. When the ac power supply circuit 105 is blocked, the operating state of the ac power supply circuit 105 is switched from the operating state to the non-operating state, so that the dc power received by the intermediate dc circuit 103 is changed from being provided by the ac power supply circuit 105 to being provided by the dc power supply circuit 102. In this embodiment, in consideration of the power supply capability of the energy storage system 102, the preset voltage is preferably smaller than or equal to an output voltage of the ac power supply circuit in the operating state.
For example, when the locomotive is traveling in the non-phase separation region, the intermediate dc circuit 103 in the power supply system receives 1800 vdc for the ac power supply system 105, and when traveling through the first ground sensor G1, the intermediate dc circuit 103 receives 1500 vdc for the dc power supply system 105.
It should be noted that, in other embodiments of the present invention, according to practical needs, the power supply system may not decrease the output power of the ac power supply circuit, and the voltage output by the dc power supply circuit may also be greater than the output voltage when the ac power supply circuit is in the operating state, which is not limited to this.
In addition, in order to ensure the reliability of power supply switching, in other embodiments of the present invention, the power supply control circuit 110 may also start the dc power supply circuit 102 during the process of reducing the output power of the ac power supply circuit 105, and block the ac power supply circuit 105 when the output power of the ac power supply circuit 105 is reduced to the preset power threshold.
In this embodiment, the ac power supply circuit 105 is blocked, and the power supply control circuit 110 also opens the main circuit breaker to break the point connection between the catenary and the traction transformer 104. The first ground sensor G1 is spaced apart from the second ground sensor G2 by a distance S1, and the operation of the ac control circuit 110 to open the main circuit breaker needs to be completed before the locomotive travels to the second ground sensor G2.
If the main circuit breaker is not normally opened when the locomotive travels to the second ground sensor G2, the power supply control circuit 110 in this embodiment generates and outputs a corresponding alarm signal to instruct the operator to perform a manual operation to manually open the main circuit breaker. Since the second ground sensor G2 is spaced apart from the phase separation region by the distance S2, the operator can manually open the main circuit breaker with sufficient time.
It should be noted that, in different embodiments of the present invention, specific values of the distances S1 and S2 may be configured to be different reasonable values according to actual needs, and the present invention does not limit the specific values of S1 and S2.
In this embodiment, when the vehicle travels through the third ground sensor G3, the power supply control circuit 110 receives the phase-out signal transmitted from the ground sensor G3, and at this time, the power supply control circuit 110 closes the main circuit breaker and starts the ac power supply circuit 105, so that the ac power supply circuit 105 can be switched from the non-operating state to the operating state, and the intermediate dc circuit 103 can receive the electric energy transmitted by the ac power supply circuit 105. Therefore, the electric energy received by the auxiliary inverter circuit 106 and the traction inverter circuit 108 is changed into the electric energy provided by the overhead line system again.
When the power supply control circuit determines that the conditions for closing the main breaker (e.g., the network voltage is normal and no main breaker closing prohibition fault is met), the power supply control circuit closes the main breaker and starts the ac power supply circuit 105, and at this time, the voltage of the intermediate DC circuit 103 may be restored to a higher voltage such as DC1800V, and the power around the traction wheel may be restored to normal.
In this embodiment, after the ac power supply circuit 105 is in the working state, according to actual needs, the power supply control circuit 110 may control the dc power supply circuit 102 to convert the voltage of the dc power transmitted by the intermediate dc circuit 103 and transmit the converted dc power to the energy storage circuit 101 connected thereto, so as to charge the energy storage circuit 101. After the energy storage circuit 101 is charged, the power supply control circuit 110 controls the dc power supply circuit 102 to be switched from the operating state to the non-operating state, so as to disconnect the electrical connection between the energy storage device 101 and the intermediate dc circuit 103. This also makes it possible to form a schematic diagram of the switching sequence of the power supply system over the neutral section as shown in fig. 3.
Since the locomotive running on the rail may be bidirectional, the third ground sensor G3 and the fourth ground sensor G4 are preferably symmetrically arranged with respect to the center position of the phase separation section with respect to the second ground sensor G2 and the first ground sensor G1, so that the power supply control circuit 110 can perform switching of the power supply circuit in the same control prevention manner when the locomotive runs right to left.
It should be noted that in other embodiments of the present invention, the power supply system may be applied to other electric locomotives according to actual needs, so that the electric locomotives can pass through the phase separation zone at high speed.
As can be seen from the above description, the power supply system provided by the present invention enables the rail grinding engineering vehicle to adopt the energy storage device (such as a super capacitor, etc.) to supply power to the grinding operation system when passing through the neutral section, and compared with the existing power supply mode, the mode is more environment-friendly and energy-saving, and does not need to frequently start the diesel engine before and after passing through the neutral section like the existing diesel engine power supply mode.
Meanwhile, the power supply system realizes the double-power seamless switching of the energy storage device and the contact network, so that the operating characteristic requirements of the high-speed rail grinding wagon can be met, and the engineering wagon can perform double-power seamless switching and continuous operation in a non-electricity area (namely a phase separation area) and an electricity area of the contact network.
It is to be understood that the disclosed embodiments of the invention are not limited to the particular structures or process steps disclosed herein, but extend to equivalents thereof as would be understood by those skilled in the relevant art. 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.
While the above examples are illustrative of the principles of the present invention in one or more applications, it will be apparent to those of ordinary skill in the art that various changes in form, usage and details of implementation can be made without departing from the principles and concepts of the invention. Accordingly, the invention is defined by the appended claims.
Claims (9)
1. An electric locomotive power supply system, characterized in that the power supply system comprises:
an energy storage device;
the direct current power supply circuit is connected with the energy storage device and is used for transforming direct current transmitted by the energy storage device;
the alternating current power supply circuit is connected with the traction transformer and used for rectifying alternating current transmitted by the traction transformer to obtain corresponding direct current;
an intermediate dc circuit connected to the dc power supply circuit and the ac power supply circuit;
the traction inverter circuit is connected with the intermediate direct current circuit and is used for converting direct current transmitted by the intermediate direct current circuit into corresponding alternating current and transmitting the alternating current to a traction motor connected with the traction inverter circuit so as to drive the traction motor to operate;
the auxiliary inverter circuit is connected with the intermediate direct-current circuit and is used for converting direct current transmitted by the intermediate direct-current circuit into corresponding alternating current;
when the electric locomotive is in a phase separation region, the direct current power supply circuit is in a working state, and the alternating current power supply circuit is in a non-working state;
the power supply system further includes:
the power supply control circuit is connected with the direct current power supply circuit and the alternating current power supply circuit and is used for controlling the running states of the direct current power supply circuit and the alternating current power supply circuit;
the power supply control circuit is configured to, when a phase-incoming zone signal is received, block the ac power supply circuit to enable the ac power supply circuit to be in a non-operating state, and start the dc power supply circuit to enable the dc power supply circuit to be in an operating state, so that the energy storage device provides electric energy to the intermediate dc circuit through the dc power supply circuit.
2. The power supply system of claim 1, wherein the dc power supply circuit comprises:
a first pre-charge circuit connected with the energy storage device;
and the direct current transformation circuit is connected with the first pre-charging circuit and the intermediate direct current circuit and is used for boosting or reducing the voltage of the electric energy transmitted by the first pre-charging circuit or the intermediate direct current circuit.
3. The power supply system of claim 2 wherein said dc transformation circuit comprises a BOOST circuit.
4. The power supply system according to any one of claims 1 to 3, wherein the AC power supply circuit includes:
a second pre-charge circuit for connection with the traction transformer;
and the rectifying circuit is connected with the second pre-charging circuit and the intermediate direct current circuit and is used for rectifying the alternating current transmitted by the second pre-charging circuit or inverting the direct current transmitted by the intermediate direct current circuit.
5. The power supply system of claim 1 wherein, upon receipt of a phase-split signal, the power supply control circuit is configured to activate the dc power supply circuit to cause the dc power supply circuit to convert the voltage of the dc power transmitted by the energy storage system to a predetermined voltage, and subsequently to deactivate the ac power supply circuit to cause the ac power supply circuit to be in an inactive state, wherein the predetermined voltage is less than or equal to the output voltage of the ac power supply circuit when in the active state.
6. The power supply system of claim 5 wherein the output power of the AC power supply circuit is gradually reduced when a phase-split signal is received, and wherein when the output power is reduced to a predetermined power threshold, the power supply control circuit is configured to activate the DC power supply circuit to cause the DC power supply circuit to convert the voltage of the DC power transmitted from the energy storage device to a predetermined voltage, and to block the AC power supply circuit to cause the AC power supply circuit to be in an inactive state.
7. The power supply system of claim 1 wherein the power supply control circuitry is configured to activate the ac power supply circuitry upon receiving a phase section signal to place the ac power supply circuitry in an operational state to cause the dc power supply circuitry to receive power provided by the traction transformer.
8. The power supply system of claim 7 wherein the power supply control circuit is configured to activate the dc power supply circuit to operate the dc power supply circuit when the phase-out signal is received, such that the dc power supply circuit converts the voltage of the dc power transmitted by the intermediate dc circuit and transmits the converted dc power to the energy storage device, thereby charging the energy storage device.
9. A rail grinding engineering vehicle, characterized by comprising the power supply system according to any one of claims 1 to 8.
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| CN201711237664.XA CN109861367B (en) | 2017-11-30 | 2017-11-30 | Power supply system of electric locomotive |
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| CN201711237664.XA CN109861367B (en) | 2017-11-30 | 2017-11-30 | Power supply system of electric locomotive |
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| CN109861367B true CN109861367B (en) | 2021-04-23 |
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| CN110667650A (en) * | 2019-10-17 | 2020-01-10 | 株洲中车时代电气股份有限公司 | Control method and control system for passing neutral section of train |
| CN112776678B (en) * | 2019-11-11 | 2022-10-21 | 株洲中车时代电气股份有限公司 | Control method and control system for switching power supply modes of energy storage train |
| CN111994128B (en) * | 2020-08-18 | 2022-03-15 | 中车青岛四方车辆研究所有限公司 | Grid-connected control method and system for auxiliary inverter of urban rail train |
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