CN111267675B - Train power supply network and quasi-bilateral power supply traction power supply system thereof - Google Patents
Train power supply network and quasi-bilateral power supply traction power supply system thereof Download PDFInfo
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- CN111267675B CN111267675B CN202010166548.9A CN202010166548A CN111267675B CN 111267675 B CN111267675 B CN 111267675B CN 202010166548 A CN202010166548 A CN 202010166548A CN 111267675 B CN111267675 B CN 111267675B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M3/00—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power
- B60M3/02—Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power with means for maintaining voltage within a predetermined range
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
Abstract
The application discloses power supply system is pull in accurate bilateral power supply includes: the first traction transformer is arranged in the first substation and used for receiving external electric energy and outputting single-phase voltage to a traction network; the first in-phase power supply converter device is used for outputting single-phase voltage to the traction network under the control of the controller, and the phase of the first in-phase power supply converter device is the same as that of the output voltage of the first traction transformer; the second traction transformer is arranged in the second substation and used for receiving external electric energy and outputting single-phase voltage to the traction network; the second in-phase power supply converter device is used for outputting single-phase voltage to the traction network under the control of the controller, and the phase of the single-phase voltage is the same as that of the output voltage of the second traction transformer; a partition station; a controller; the first substation and the second substation are both provided with only one transition region. By applying the scheme, a plurality of problems caused by electric phase splitting of the substation are avoided. The application also provides a train power supply network which has a corresponding effect.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a train power supply network and a quasi-bilateral power supply traction power supply system thereof.
Background
At present, an electrified railway in China adopts an alternating current power supply system of a 25kV single-phase alternating current system, a return-to-incoming line high-voltage loop of a substation 2 and a ground traction transformer are generally adopted to improve the reliability of the system. In order to balance the load and eliminate the negative sequence component, a way of rotating the phase sequence by stages is usually adopted, and fig. 1 is a schematic diagram of an ac traction power supply system which is usually adopted at present.
Fig. 1 shows two traction substations and a subarea substation, the whole system comprises traction transformers, circuit breakers, feeder switches, distribution buses, traction networks, and cross-over switches, which are all passive devices and have the characteristics of simple structure, high reliability and the like. Specifically, the traction power supply system adopts segmented power supply, and power transformation needs to be performed by electric phase splitting. For example, in the substation 1 of fig. 1, taking the uplink as an example, two transition regions and a neutral section-free region are required to implement electrical phase separation. The electric phase separation seriously affects the operation efficiency of the whole system, and various problems such as limited train speed, influenced passenger comfort level, phase separation violation and even network burning can occur.
In summary, how to effectively avoid many problems caused by electric phase splitting is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a train power supply network and a quasi-bilateral power supply traction power supply system thereof.
In order to solve the technical problems, the invention provides the following technical scheme:
a quasi-bilateral powered traction power supply system comprising:
the first traction transformer is arranged in the first substation and used for receiving external electric energy and outputting single-phase voltage to a traction network;
the first in-phase power supply converter device is connected with the first traction transformer and is used for outputting single-phase voltage to the traction network under the control of the controller, and the phase of the output voltage is the same as that of the voltage output to the traction network by the first traction transformer;
the second traction transformer is arranged in the second substation and used for receiving external electric energy and outputting single-phase voltage to the traction network;
the second in-phase power supply converter device is connected with the second traction transformer and is used for outputting single-phase voltage to the traction network under the control of the controller, and the phase of the output voltage is the same as that of the voltage output to the traction network by the second traction transformer;
a substation provided between the first substation and the second substation;
the controller; wherein the first substation and the second substation each have only one transition zone.
Preferably, the phase of the voltage output by the first traction transformer to the traction network is the same as the phase of the voltage output by the second traction transformer to the traction network; and the partitions have only one transition zone.
Preferably, the method further comprises the following steps:
the current transformer is arranged in the subarea, the first end of the current transformer is connected with the first end of the transition area of the subarea, and the second end of the current transformer is connected with the second end of the transition area of the subarea;
the controller is further configured to: controlling the converter based on the received active power exchange instruction so as to exchange active power between the first power supply arm and the second power supply arm;
the power supply arm between the subarea power station and the first power substation is a first power supply arm, and the power supply arm between the subarea power station and the second power substation is a second power supply arm.
Preferably, the controller is further configured to:
and controlling the converter based on the received reactive power compensation command, and performing reactive power compensation on the first power supply arm and/or the second power supply arm.
Preferably, the controller is further configured to:
when determining that the first power supply arm is power-off, the converter provides the electric energy of the second power supply arm to the first power supply arm, and when determining that the second power supply arm is power-off, the converter provides the electric energy of the first power supply arm to the second power supply arm.
Preferably, the controller is further configured to:
and controlling the first in-phase power supply converter device and/or the second in-phase power supply converter device to adjust the power quality.
Preferably, the method further comprises the following steps:
the first detection device is arranged between the first substation and the partition; a second detection device provided between the second substation and the sub-substation; wherein the region between the first detection device and the second detection device is a passing phase region;
the first end of the current transformer is connected with the first end of the transition area of the subarea, and the second end of the current transformer is connected with the second end of the transition area of the subarea;
the controller is further configured to: after the fact that the train enters the passing neutral section area is determined through the first detection device and the second detection device, the converter is controlled to carry out voltage output, and the voltage of the first end of the transition area of the subarea is equal to the voltage of the second end of the transition area of the subarea.
Preferably, the first in-phase power supply converter device and the second in-phase power supply converter device are both in an ac-dc structure.
An electrical train supply network comprising a quasi-bilateral powered traction power supply system as claimed in any one of the preceding claims.
By applying the technical scheme provided by the embodiment of the invention, one of the traditional 2 single-phase outputs is converted into the voltage output with the same phase through the in-phase power supply current converting device. Specifically, the first traction transformer is arranged in the first substation, and can receive external electric energy and output single-phase voltage to a traction network. The first same-phase power supply converter device is connected with the first traction transformer, single-phase voltage output can be carried out on the traction network under the control of the controller, and the phase of the output voltage is the same as that of the voltage output to the traction network by the first traction transformer. Therefore, no electric phase separation exists in the first substation, and the first substation only needs to be provided with a transition region to realize electric isolation. Because the first substation does not have the electric phase splitting, the voltage at the two ends of the transition region of the first substation does not have the difference of amplitude and phase, and therefore many problems caused by the electric phase splitting of the substation can be avoided. The second substation has the same principle as the first substation. Therefore, the scheme of the application avoids a plurality of problems caused by the electric phase splitting of the substation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional AC traction power supply system;
fig. 2 is a schematic structural diagram of a quasi-bilateral power supply traction power supply system according to the present invention;
fig. 3 is a schematic structural diagram of a quasi-bilateral power supply traction power supply system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a quasi-bilateral power supply traction power supply system according to another embodiment of the present invention.
Detailed Description
The core of the invention is to provide a traction power supply system with quasi-bilateral power supply, which avoids a plurality of problems caused by electric phase splitting of a substation.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a quasi-bilateral power supply traction power supply system according to the present invention, where the quasi-bilateral power supply traction power supply system includes:
a first traction transformer 10 provided in the first substation, for receiving external electric energy and outputting a single-phase voltage to a traction grid;
the first in-phase power supply converter device 20 is connected with the first traction transformer 10 and is used for outputting single-phase voltage to a traction network under the control of the controller, and the phase of the output voltage is the same as that of the voltage output to the traction network by the first traction transformer 10;
a second traction transformer 30 provided in the second substation, for receiving external electric energy and outputting a single-phase voltage to a traction network;
the second in-phase power supply converter device 40 is connected with the second traction transformer 30 and is used for outputting single-phase voltage to the traction network under the control of the controller, and the phase of the output voltage is the same as that of the voltage output to the traction network by the second traction transformer 30;
a substation 50 provided between the first substation and the second substation;
a controller; wherein, the first substation and the second substation only have one transition region.
Specifically, the first traction transformer 10 may receive external power and output a single-phase voltage to the traction grid, for example, in fig. 2, the first traction transformer 10 receives three-phase power of the first external power and outputs an a-phase voltage to the traction grid. Meanwhile, the first power supply converter device 20 connected to the first traction transformer 10 outputs a single-phase voltage to the traction grid under the control of the controller, and the phase of the output voltage is the same as the phase of the voltage output from the first traction transformer 10 to the traction grid, that is, in fig. 2, the first power supply converter device 20 also outputs a phase voltage. That is, compared to the conventional scheme of performing 2 single-phase outputs by the main traction transformer, such as the output a phase and the output B phase in fig. 1, in the scheme of the present application, the first in-phase power supply converter device 20 is used to convert one of the original 2 single-phase outputs into an in-phase voltage output.
Further, by performing voltage output together with the first traction transformer 10 and the first in-phase power supply converter device 20, the power supply capacity of the phase a of the power supply bus of the first substation can be made to be equal to the power supply capacity of the conventional power supply system in fig. 1, and the three-phase balance on the high-voltage side of the first traction transformer 10 can also be ensured.
Since the first substation of the present application does not have an electric phase splitting, referring to fig. 2, the first substation only needs to be provided with a transition region to realize electric isolation. And it should be emphasized that the first substation described in this application is provided with only one transition area, and it is only necessary to provide one transition area on one line. For example, fig. 3 shows an uplink and a downlink, with a transition region on the uplink and a transition region on the downlink. Of course, in practical application, the line condition of the substation can be more. In addition, the controller is not shown in both fig. 2 and 3.
The voltage at the two ends of the transition region of the first substation has no difference in amplitude and phase, for example, both the voltage at the two ends of the transition region of the first substation is in phase a in fig. 2, so that many problems caused by electric phase splitting of the substation can be avoided. In addition, because the first substation only needs to be provided with one transition area, compared with the design that two transition areas and one neutral section non-electric area are needed in the figure 1, the construction workload of the system is reduced, and the reliability of the traction network is also improved.
The second substation is the same as the first substation, and the description thereof is not repeated here. It should be emphasized, however, that the phase of the voltage output by the second in-phase supply inverter 40 is the same as the phase of the voltage output by the second traction transformer 30 to the traction network, but the phase of the voltage output by the second traction transformer 30 may be the same as or different from the phase of the voltage output by the first traction transformer 10. Of course, in practical application, it can be set that: the phase of the voltage output by the first traction transformer 10 to the traction network is the same as the phase of the voltage output by the second traction transformer 30 to the traction network. Thus, the sub-section 50 does not need to be electrically split, and only one transition section is provided for electrical isolation. In the embodiment of fig. 2, the voltage phase output by the second traction transformer 30 to the traction network is also phase a. Therefore, the full-line neutral phase-splitting is realized, and the regenerated energy of adjacent substations can be further shared.
If the phase of the voltage output by the second traction transformer 30 is not the same as the phase of the voltage output by the first traction transformer 10, the section 50 needs to be electrically phase-split.
The specific structures of the first in-phase power supply variable-current device 20 and the second in-phase power supply variable-current device 40 can be set and adjusted according to actual needs, and generally, the first in-phase power supply variable-current device 20 and the second in-phase power supply variable-current device 40 can be both in an ac-dc-ac structure, so that the control by a controller is facilitated. Of course, various topologies can be adopted, and the functions of the present application can be implemented, for example, topologies in forms of 2-level, three-level, multi-level, cascade, MMC, etc. can be adopted, and the switching devices therein can adopt IGBT, IGCT, SIC, etc. In addition, the current transformer in the partition 50 described in the embodiments below is also the same, and may adopt various topologies. And the converter can be directly connected to the traction network at 25kV, and can also be connected to the traction network after being stepped down by the transformer, and the implementation of the invention is not influenced.
In an embodiment of the present invention, the method may further include:
the current transformer is arranged in the subarea 50, the first end of the current transformer is connected with the first end of the transition area of the subarea 50, and the second end of the current transformer is connected with the second end of the transition area of the subarea 50;
the controller is further configured to: controlling the converter based on the received active power exchange instruction so as to exchange active power between the first power supply arm and the second power supply arm;
the power supply arm between the zone station 50 and the first substation is a first power supply arm, and the power supply arm between the zone station 50 and the second substation is a second power supply arm.
Specifically, the controller may control the converter to perform active power exchange between the first power supply arm and the second power supply arm based on the received active power exchange command, and the specific content of the active power exchange command may depend on the current actual active power strategy. For example, when the train is located on a first power supply arm and is currently on a downhill slope, the generated electric energy is transmitted to a second power supply arm through a converter, so that the electric energy dispatching of the power grid is realized. The scheme is beneficial to improving the regenerative energy utilization rate and the overall efficiency of the whole power supply system. In the conventional scheme, for the energy of the regenerative braking of the train, due to the existence of the neutral section and the dead zone, the recycling of the energy is restricted by each section, namely, the energy cannot be fully utilized.
In this embodiment, the power exchange between the two ends of the substation 50 is realized by using the converter, which is equivalent to the realization of controllable interconnection between two high-voltage power supplies through the converter for the power system, and this is completely consistent with the realization of interconnection between large power grids by using the currently widely-used HVDC, and can be accepted by the power system, thereby avoiding the uncontrollable energy exchange, even possible circulation, between two power substations in the full bilateral power supply system, and the safety problem caused thereby.
In one embodiment of the present invention, the controller may be further configured to:
and controlling the converter based on the received reactive power compensation command, and performing reactive power compensation on the first power supply arm and/or the second power supply arm.
In this embodiment, the two ends of the converter are connected to the first power supply arm and the second power supply arm respectively, so that the converter can be regarded as a power electronic power compensator to realize reactive power compensation for the first power supply arm and/or the second power supply arm. The specific strategy for performing reactive power compensation depends of course on the actual needs. By performing reactive power compensation, it is advantageous to further optimize the power quality of the entire power supply system.
In one embodiment of the present invention, the controller is further operable to:
the first in-phase supply inverter device 20 and/or the second in-phase supply inverter device 40 are controlled for power quality adjustment.
In the above-described embodiment, the converter is controlled by the controller to realize the active power exchange and the reactive power compensation, and in this embodiment, the power quality may be adjusted under the control of the controller, considering that both the first in-phase power supply converter device 20 and the second in-phase power supply converter device 40 are active devices. For example, voltage fluctuation, reactive power, harmonic waves and the like are reduced, and the electric energy quality of the supply voltage of the traction network is improved.
In one embodiment of the present invention, the controller may be further configured to:
when determining that first power supply arm loses the electricity, provide the electric energy of second power supply arm to first power supply arm through the converter, when determining that second power supply arm loses the electricity, provide the electric energy of first power supply arm to second power supply arm through the converter.
In the embodiment, the converter and the controller are used for realizing the function of over-area power supply, namely when one power supply arm fails, the energy of the other power supply arm can be rapidly converted into energy with the same amplitude and phase to be supplied to the failed power supply arm. Compared with the traditional scheme which needs manual operation of the over-zone switch, the scheme of the application can realize remote, fast and automatic over-zone power supply, so that the power-off time caused by over-zone operation is shortened, and the system efficiency and the intelligent level are improved.
In addition, the standby transformer and the second high-voltage power supply loop are omitted in consideration of the fact that the power supply can be conducted in a handover mode conveniently and quickly. In the conventional scheme, the high-voltage power supply side adopts a 1-master-1-slave mode. Resulting in a low utilization of the device and a power system capacity being idle. After a standby transformer and a second high-voltage power supply loop are cancelled, the method is favorable for saving the initial investment of a substation and the building area, more importantly, the method can release a large amount of standby capacity set for a railway traction power supply system by a power system, improves the power supply capacity of the whole power system, and can reduce the capacity charge of railway departments.
In addition, the partitioned converter in fig. 3 is directed to the application scheme that the ends of the traction network are not connected in parallel, and if the ends are connected in parallel, the scheme can be further simplified as shown in fig. 4, that is, one converter can be multiplexed by the uplink and the downlink.
In one embodiment of the present invention, the method further comprises:
a first detection device provided between the first substation and the substation 50; a second detection device provided between the second substation and the substation 50; the region between the first detection device and the second detection device is a neutral section passing region;
the first end of the current transformer is connected with the first end of the transition area of the subarea 50, and the second end of the current transformer is connected with the second end of the transition area of the subarea 50;
the controller is further configured to: after the train enters the passing neutral section area through the first detection device and the second detection device, the converter is controlled to output voltage, so that the voltage of the first end of the transition area of the subarea 50 is equal to the voltage of the second end of the transition area of the subarea 50.
As described above, the phase of the voltage output by the second traction transformer 30 to the traction network may be generally the same as the phase of the voltage output by the first traction transformer 10 to the traction network, and thus, full-line neutral phase separation is achieved, although the scheme may be implemented if the phase of the voltage output by the second traction transformer 30 to the traction network is different from the phase of the voltage output by the first traction transformer 10 to the traction network, but the phase separation is required by the sub-division station 50. The implementation mode is a scheme of automatic phase separation by the partitions, is convenient to implement and is beneficial to guaranteeing the safety of the system.
Specifically, in this embodiment, the substation 50 provided between the first substation and the second substation has only one transition area. The first end of the current transformer is connected with the first end of the transition region, and the second end of the current transformer is connected with the second end of the transition region. And after the train enters the passing neutral zone, the controller controls the converter according to a corresponding strategy. The first detection device and the second detection device are devices for determining whether the train enters the passing phase region. And it can be understood that whether the train enters the passing phase area or not is described in this embodiment, specifically, with respect to the position of the pantograph of the train, when the pantograph of the train is located in the passing phase area, it can be determined that the train enters the passing phase area.
The specific forms and the position settings of the first detection device and the second detection device can be set and selected according to actual needs. For example, the first detection means may be several tens of meters or less from the transition region of the partition 50, although the distance may be adjusted as desired. The first detection device and the second detection device can both adopt a commonly-used detection device for detecting the position of the pantograph, and can also determine whether the pantograph of the train enters the neutral section passing area or not based on a train-ground communication mode. For example, a detection device such as an axle counter, a magnetic steel, a current sensor, or a pantograph detector may be used.
Therefore, after the train enters the neutral section passing area based on the first detection device and the second detection device, the controller controls the converter to output voltage, so that the voltage of the first end of the transition area of the section 50 is equal to the voltage of the second end of the transition area of the section 50.
When the pantograph of the train is located in the transition area of the partition 50, the first end of the transition area of the partition 50 is electrically connected to the second end of the transition area of the partition 50 through the pantograph, and at this time, the voltages of the first end of the transition area of the partition 50 and the second end of the transition area of the partition 50 need to be the same, otherwise, dangerous situations such as electric sparks can be generated. Therefore, in the present embodiment, after the train enters the passing phase region, the controller controls the voltage at the first end of the transition zone of the section 50 to be equal to the voltage at the second end of the transition zone of the section 50. When the controller controls the converter to make the voltage at the first end of the transition region of the partition 50 equal to the voltage at the second end of the transition region of the partition 50, the controller may use the voltage at the first end of the transition region of the partition 50 as a reference, or may use the voltage at the second end of the transition region of the partition 50 as a reference. Of course, a predetermined voltage value may be used as a reference, but the voltage at the first end of the transition region of the segment 50 is usually used as a reference or the voltage at the second end of the transition region of the segment 50 is usually used as a reference. It should be emphasized that the voltages described in this application are equal, meaning that the voltages are equal in magnitude and phase, i.e. a vector.
By applying the technical scheme provided by the embodiment of the invention, one of the traditional 2 single-phase outputs is converted into the voltage output with the same phase through the in-phase power supply current converting device. Specifically, the first traction transformer 10 is provided in the first substation, and can receive external electric energy and output a single-phase voltage to the traction network. The first in-phase power supply converter device 20 is connected to the first traction transformer 10, and under the control of the controller, can output a single-phase voltage to the traction grid, and the phase of the output voltage is the same as the phase of the voltage output by the first traction transformer 10 to the traction grid. Therefore, no electric phase separation exists in the first substation, and the first substation only needs to be provided with a transition region to realize electric isolation. Because the first substation does not have the electric phase splitting, the voltage at the two ends of the transition region of the first substation does not have the difference of amplitude and phase, and therefore many problems caused by the electric phase splitting of the substation can be avoided. The second substation has the same principle as the first substation. Therefore, the scheme of the application avoids a plurality of problems caused by the electric phase splitting of the substation.
Corresponding to the above embodiments of the quasi-bilateral power supply traction power supply system, embodiments of the present invention further provide a train power supply network, which may include the quasi-bilateral power supply traction power supply system in any of the above embodiments, and a description thereof is not repeated here.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention. The principle and the implementation of the present invention are explained in the present application by using specific examples, and the above description of the embodiments is only used to help understanding the technical solution and the core idea of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (8)
1. A quasi-bilateral powered traction power supply system, comprising:
the first traction transformer is arranged in the first substation and used for receiving external electric energy and outputting single-phase voltage to a traction network;
the first in-phase power supply converter device is connected with the first traction transformer and is used for outputting single-phase voltage to the traction network under the control of the controller, and the phase of the output voltage is the same as that of the voltage output to the traction network by the first traction transformer;
the second traction transformer is arranged in the second substation and used for receiving external electric energy and outputting single-phase voltage to the traction network;
the second in-phase power supply converter device is connected with the second traction transformer and is used for outputting single-phase voltage to the traction network under the control of the controller, and the phase of the output voltage is the same as that of the voltage output to the traction network by the second traction transformer;
a substation provided between the first substation and the second substation;
the controller; wherein the first substation and the second substation both have only one transition zone;
further comprising:
the first detection device is arranged between the first substation and the partition; a second detection device provided between the second substation and the sub-substation; wherein the region between the first detection device and the second detection device is a passing phase region;
the first end of the current transformer is connected with the first end of the transition area of the subarea, and the second end of the current transformer is connected with the second end of the transition area of the subarea;
the controller is further configured to: after the first detection device and the second detection device determine that the train enters the passing neutral section area, controlling the converter to output voltage so that the voltage of the first end of the transition area of the subarea is equal to the voltage of the second end of the transition area of the subarea; and the partitions have only one transition zone.
2. The system of claim 1, wherein the first traction transformer outputs a voltage to the traction network that is in phase with a voltage output by the second traction transformer to the traction network; and the partitions have only one transition zone.
3. A quasi-bilateral powered tractive power supply system according to claim 2, further comprising:
the current transformer is arranged in the subarea, the first end of the current transformer is connected with the first end of the transition area of the subarea, and the second end of the current transformer is connected with the second end of the transition area of the subarea;
the controller is further configured to: controlling the converter based on the received active power exchange instruction so as to exchange active power between the first power supply arm and the second power supply arm;
the power supply arm between the subarea power station and the first power substation is a first power supply arm, and the power supply arm between the subarea power station and the second power substation is a second power supply arm.
4. A quasi-bilateral powered traction power supply system as in claim 3 wherein the controller is further configured to:
and controlling the converter based on the received reactive power compensation command, and performing reactive power compensation on the first power supply arm and/or the second power supply arm.
5. A quasi-bilateral powered traction power supply system as in claim 3 or 4 wherein the controller is further configured to:
when determining that the first power supply arm is power-off, the converter provides the electric energy of the second power supply arm to the first power supply arm, and when determining that the second power supply arm is power-off, the converter provides the electric energy of the first power supply arm to the second power supply arm.
6. A quasi-bilateral powered traction power supply system as in claim 1 wherein the controller is further configured to:
and controlling the first in-phase power supply converter device and/or the second in-phase power supply converter device to adjust the power quality.
7. The system of claim 1, wherein the first in-phase current transformer and the second in-phase current transformer are both ac-dc-ac power-supplied in-phase current transformers.
8. An electrical train supply network comprising a quasi-bilateral powered traction supply system as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010166548.9A CN111267675B (en) | 2020-03-11 | 2020-03-11 | Train power supply network and quasi-bilateral power supply traction power supply system thereof |
Applications Claiming Priority (1)
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| CN111267676B (en) * | 2020-03-11 | 2021-08-24 | 中车株洲电力机车研究所有限公司 | Train power supply network and traction system for automatic passing through neutral section of subarea thereof |
| CN111890995A (en) * | 2020-06-28 | 2020-11-06 | 中铁第一勘察设计院集团有限公司 | Bilateral through power supply system for electrified railway |
| CN112124153B (en) * | 2020-09-28 | 2023-11-10 | 成都尚华电气有限公司 | Through type in-phase power supply structure, system and control method |
| CN112977181A (en) * | 2021-03-18 | 2021-06-18 | 清华大学 | Flexible alternating-current traction power supply system for realizing through same phase and operation method thereof |
| CN112865098B (en) * | 2021-03-18 | 2022-10-21 | 中铁电气化局集团有限公司 | Full-through type flexible traction power supply system compatible with out-of-phase power supply |
| CN113076660B (en) * | 2021-04-28 | 2023-01-31 | 中铁二院工程集团有限责任公司 | Electrified railway circulation calculation method adopting hybrid power supply system bilateral power supply mode |
| CN113131484A (en) * | 2021-04-29 | 2021-07-16 | 西安开天铁路电气股份有限公司 | Distributed railway regenerative electric energy cloud control system |
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