CN113978321A - Bilateral through power supply subsection station and traction power supply system - Google Patents
Bilateral through power supply subsection station and traction power supply system Download PDFInfo
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- CN113978321A CN113978321A CN202111248635.XA CN202111248635A CN113978321A CN 113978321 A CN113978321 A CN 113978321A CN 202111248635 A CN202111248635 A CN 202111248635A CN 113978321 A CN113978321 A CN 113978321A
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
Abstract
The present disclosure relates to a bilateral feed-through substation and a traction power supply system. The subsection is applied to a bilateral/through traction power supply system, is arranged between adjacent traction substations, replaces a current subarea/AT station/parallel switch station and the like, and a contact network AT the position of the subsection is arranged according to the form of two adjacent groups of electric subsections, so that the traction network is divided into a left section and a right section, the contact network subsection protection and control are realized, and the fault influence range is reduced; the contact nets on the two sides of the two groups of electric subsections are communicated in the subsection station, so that the same-phase bilateral power supply between two adjacent traction substations is realized; the neutral section between the two groups of electric sections is supplied with power by a bus in the section post, and the locomotive passes through the neutral section and the neutral section in a non-electric phase splitting and non-power-off mode when passing, so that the aim of canceling the traditional electric phase splitting is fulfilled. Therefore, the electric phase splitting in the traction power supply system is favorably reduced, the train operation efficiency is improved, the reasonable segmentation of the overhead line system is realized, the fault influence range is reduced, and the power supply reliability and flexibility are improved.
Description
Technical Field
The disclosure relates to the technical field of traction power supply, in particular to a bilateral through power supply subsection station and a traction power supply system.
Background
In recent years, the electric railway has been developed rapidly, and electric traction is a power traction mode capable of replacing oil with electricity in various transportation modes, and the energy source advantage is very obvious. The traditional traction power supply system usually adopts a unilateral power supply mode, the unilateral power supply traction power supply system comprises an external power supply, a traction substation, a subarea, an Autotransformer (AT) station, a switching station, a contact network (namely a traction network) and the like, and electric phase splitting is arranged in the traction substation and the subarea to form a neutral section non-electric area while balancing loads of all phases; meanwhile, in order to prevent the pantograph of the locomotive from running into a dead zone in a charged state, the locomotive is generally powered off in advance and passes through inertia when passing through electric phase separation.
The traction power supply system of the electrified railway in China usually adopts in-phase single-side power supply, as shown in figure 1 or figure 2, the system comprises an external power supply, a traction substation, a subarea station (AT station, switching station, etc.), a contact network, and the like, and an electric phase splitting is required to be arranged AT the traction substation and the subareas between the traction substations. The electric phase separation causes a dead zone, when a train passes through, the train needs to be disconnected from the vehicle-mounted main breaker in advance and then passes through by inertia, and then the main breaker is closed to continue to get electricity from a contact net, so that a dead process is generated in each phase separation, the speed of the train is reduced, overvoltage is generated, and even an accident that the locomotive falls into the dead zone of the electric phase separation and cannot be started can be caused. Especially in complex and difficult mountainous areas, large slopes and heavy-load railways, the influence factors of the electric phase separation are increasingly concerned by all parties, and how to reduce (cancel) the electric phase separation is always the focus of the attention of all parties.
Disclosure of Invention
To solve the above technical problem or at least partially solve the above technical problem, the present disclosure provides a bilateral through power supply section station and a traction power supply system.
The utility model provides a section station, which is applied to a bilateral/through traction power supply system, is arranged between adjacent traction substations and replaces the current section station/AT station/parallel switch station and the like;
the contact network at the position of the subsection is arranged in the form of two adjacent groups of electric subsections, and the traction network is divided into a left section and a right section (namely two sections) so as to realize subsection protection and control of the contact network and reduce the fault influence range;
the contact nets on the two sides of the two groups of electric subsections are communicated in the subsection station, so that the same-phase bilateral power supply between two adjacent traction substations is realized;
the neutral section between the two groups of electric sections is supplied with power by a bus in the section post, and the locomotive passes through the neutral section and the neutral section in a non-electric phase splitting and non-power-off mode when passing, so that the aim of canceling the traditional electric phase splitting is fulfilled.
In some embodiments, the section includes an inner bus bar and a section switch; the overhead line system of the traction power supply system also comprises an electric subsection and a neutral section which are arranged at the position of the subsection;
the section switch is respectively connected between the bus in the station and an upper access line and a lower access line of a contact network of the traction power supply system at the section position and between the bus in the station and the contact network at the neutral section position, so as to form independent control protection of each section of circuit.
In some embodiments, the sectionalizer includes a circuit breaker and associated disconnector and control protection.
In some embodiments, in a direct feed thru power supply system, the overhead line system includes a left uplink, a right uplink, a left downlink, a right downlink at the location of the subsections, and an uplink and a downlink at the location of the neutral section;
the number of the section switches is six, and the section switches are respectively connected between the bus and the left uplink, between the bus and the left downlink, between the bus and the right uplink, between the bus and the right downlink, between the bus and the uplink at the neutral section position and between the bus and the downlink at the neutral section position.
In some embodiments, in the AT pass-through power supply system, the catenary AT the location of the section includes a left uplink T line, a right uplink T line, a left uplink F line, a right uplink F line, a left downlink T line, a right downlink T line, a left downlink F line, a right downlink F line, and an uplink T line and a downlink T line AT the location of the neutral section;
section switch includes dipole, monopole circuit breaker, dipole, monopole circuit breaker's quantity is six, and the ascending T line inlet wire in left side and the ascending F line inlet wire of going up are connected to the bus in institute through same dipole circuit breaker, and the ascending T line inlet wire in right side and the ascending F line inlet wire of going up are connected to the bus in institute through same dipole circuit breaker, and the descending T line inlet wire in left side and the descending F line inlet wire of going down are connected to the bus in institute through same dipole circuit breaker, and the descending T line inlet wire in right side and the descending F line inlet wire of going down are connected to the bus in institute through same dipole circuit breaker, and the ascending T line of neutral section position department is connected to the bus in institute through a monopole circuit breaker, and the descending T line of neutral section position department is connected to the bus in institute through a monopole circuit breaker.
In some embodiments, in the AT pass-through power supply system, the catenary AT the location of the section includes a left uplink T line, a right uplink T line, a left uplink F line, a right uplink F line, a left downlink T line, a right downlink T line, a left downlink F line, a right downlink F line, and an uplink T line and a downlink T line AT the location of the neutral section;
the section switch comprises single-pole circuit breakers, and the number of the single-pole circuit breakers is ten: the left side goes up T line inlet wire, right side upward T line inlet wire, left side upward F line inlet wire, right side upward F line inlet wire, left side downward T line inlet wire, right side downward T line inlet wire, left side downward F line inlet wire, right side downward F line inlet wire and the last T line and the down T line of neutral section position department are connected to institute's generating line through corresponding monopole breaker respectively.
The present disclosure also provides a traction power supply system, which includes any one of the above-mentioned sectionalizers.
In some embodiments, the traction power supply system further comprises a traction substation;
at least one subsection station is arranged between two adjacent traction substation.
In some embodiments, two adjacent sets of electrical segments and a neutral segment therebetween are provided at the location of the segments;
wherein the rail locomotive passes through at the neutral section in an uninterruptible manner.
In some embodiments, two adjacent sets of electrical sections are provided in both the traction substation and the staging area, and rail locomotives pass through the traction substation and the neutral section in a non-outage manner.
In some embodiments, optical fiber differential protection is arranged between adjacent traction substations and the subsection; and
when the segments are adjacently arranged, light differential protection is arranged between the adjacent segments.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
the bilateral through power supply sectionalizing station and the traction power supply system provided by the embodiment of the disclosure are applied to a bilateral/through traction power supply system, are arranged between adjacent traction substations, replace a current sectionalizing station/AT station/parallel switch station and the like, are arranged in a mode of two adjacent groups of electric sectionalizing, divide a contact network AT the sectionalizing station into a left section and a right section, so as to realize sectionalized protection and control of the contact network and reduce the fault influence range; the contact nets on the two sides of the two groups of electric subsections are communicated in the subsection station, so that the same-phase bilateral power supply between two adjacent traction substations is realized; the neutral section between the two groups of electric sections is supplied with power by a bus in the section post, and the locomotive passes through the neutral section and the neutral section in a non-electric phase splitting and non-power-off mode when passing, so that the aim of canceling the traditional electric phase splitting is fulfilled. According to the technical scheme provided by the embodiment of the disclosure, the traditional subarea station/AT station/parallel switch station and the like in the traction power supply system can be replaced by the subsection station, and the traditional electric phase separation is not arranged in the subsection station, so that the electric phase separation in the traction power supply system is reduced, the train operation efficiency is improved, the reasonable subsection of a contact network is realized, the fault influence range is reduced, and the power supply reliability and flexibility are improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a traction power supply system in a direct supply manner in the related art;
fig. 2 is a schematic structural diagram of a traction power supply system in an autotransformer power supply manner in the related art;
fig. 3 is a schematic structural diagram of a direct supply neutral section protection pass-through traction power supply system according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an autotransformer bipolar neutral section protection run-through traction power supply system according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an autotransformer single-pole neutral section protection run-through traction power supply system according to an embodiment of the present disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
Aiming at the problems in the background art, under the mode of bilateral/through power supply, the contact networks in the group range are supplied with power in the same phase, and conditions are provided for reducing (even canceling) electric phase splitting.
Therefore, the embodiment of the disclosure provides a traction network subsection station suitable for a bilateral/through power supply mode, and the subsection station can replace a traditional subsection station/AT station/parallel switch station and the like; and furthermore, the traction network structure is reasonably divided, so that the influence range of the traction network fault can be reduced, the fault recovery time is shortened and the power supply reliability of the traction network is integrally improved while the in-phase bilateral/through power supply of the traction network and the electric phase splitting are cancelled.
The bilateral feed-through substation and the traction power supply system provided by the embodiment of the disclosure are exemplarily described below with reference to fig. 3 to 5.
In some embodiments, fig. 3 is a schematic structural diagram of a direct-supply two-stage traction power supply system according to an embodiment of the present disclosure. With reference to fig. 3 and 1, in the conventional direct-supply traction network structure shown in fig. 1, a twisted connection manner is adopted for the subareas, so that the protection configuration is difficult to cooperate with a traction substation, and the function of reducing the power failure range is not achieved. Fig. 2 is based on conventional impedance protection, and does not play a role in reducing the power outage range.
In response to this, the applicant has conducted creative work to improve the wiring of the subarea, and can form a system structure as shown in any one of fig. 3-5, namely, a traction power supply system including the subarea without providing a parallel switch station or an AT station.
In addition, the functions of the section bar shown in any one of fig. 3-5 (compared with the section bar shown in fig. 1 and 2) are not the functions of the conventional section bar (e.g., parallel connection, handover, section bar, etc.), but rather, the section bar and the through-section bar are used for illustrating the division, and the embodiment of the present disclosure will be referred to as the section bar.
In some embodiments, fig. 3 is a schematic structural diagram of a direct-supply through-traction power supply system with neutral section protection according to an embodiment of the present disclosure. Referring to fig. 3, the segment includes: the internal bus 100, the section switch 101 and the overhead line system of the traction power supply system also comprise two groups of adjacent electric sections and neutral sections 102 arranged at the positions of the sections; the section switch 101 is respectively connected between the bus 100 in the station and the overhead line and the downstream access line of the overhead line system at the position of the section and between the bus 100 in the station and the overhead line at the position of the neutral section 102 to form the section protection of the line. Where 103 is a neutral section switch specific to the disclosed example.
In some embodiments, the sectionalizer 101 comprises a circuit breaker.
Based on this, the bus 100 in the section is connected with both sides of the contact network power section by the circuit breakers of the uplink and downlink access lines of the section, the traction network is divided into 6 power supply units, namely, the uplink and downlink in the left-right direction are separated, the uplink and downlink neutral sections are separated, and the neutral section power-off protection can be realized.
Optionally, in the traction power supply system, the line breaker of the sectionalizing station can be in on-off cooperation with the feeder breaker of the traction substation, and optical fiber differential protection can be set, so that independent power supply unit power cut and transmission can be realized.
In some embodiments, with continued reference to fig. 3, in a direct feed thru power supply system, the overhead line system includes a left uplink, a right uplink, a left downlink, a right downlink at each segment location, and an uplink and a downlink at a neutral segment location; in each section, the number of the section switches 101 is six, and the six section switches 101 are respectively connected between the internal bus 100 and the left uplink, between the internal bus 100 and the right uplink, between the internal bus 100 and the left downlink, between the internal bus 100 and the right downlink, between the internal bus 100 and the uplink at the position of the neutral section, and between the internal bus 100 and the downlink at the position of the neutral section.
In the embodiment of the present disclosure, the left uplink, the right uplink, the left downlink, the right downlink, and the uplink and the downlink at the neutral section position are respectively connected to the internal bus 100 through corresponding section switches 101 (e.g., circuit breakers).
The above description, in conjunction with fig. 3, illustrates an example of a segmented structure in a direct-fed traction power supply system. The structure of the segments in the traction power supply system in the AT power supply mode is exemplarily described below with reference to fig. 4 and 5.
In some embodiments, fig. 4 is a schematic structural diagram of an AT power supply mode (bipolar) through traction power supply system with neutral section protection according to an embodiment of the present disclosure. Referring to fig. 4, in the AT run-through power supply system, the catenary AT the location of the section includes a left uplink T line, a right uplink T line, a left uplink F line, a right uplink F line, a left downlink T line, a right downlink T line, a left downlink F line, a right downlink F line, and an uplink T line and a downlink T line AT the location of the neutral section; the section switch 101 comprises four bipolar circuit breakers 1011, the left uplink T line and the left uplink F line are connected to the internal bus 100 through the same bipolar circuit breaker 1011, the right uplink T line and the right uplink F line are connected to the internal bus 100 through the same bipolar circuit breaker 1011, the left downlink T line and the right downlink F line are connected to the internal bus 100 through the same bipolar circuit breaker 1011, and the right downlink T line and the right downlink F line are connected to the internal bus 100 through the same bipolar circuit breaker 1011; the number of the single-pole circuit breakers 1011 is 2, the upper line T at the neutral section position is connected to the internal bus 100 through one single-pole circuit breaker 1011, and the lower line T at the neutral section position is connected to the internal bus 100 through one single-pole circuit breaker 1011.
Compared with fig. 2, for the AT power supply mode of the high-speed railway, the wiring of the partition shown in fig. 2 can meet the requirement of setting the segment protection, but the uplink and downlink parallel points formed by the AT cause difficulty in setting the segment protection. In view of the above, in combination with the functions of the AT and the above-mentioned subsections, the applicant improves the main connection of the AT and the AT subsections through creative labor, can form the AT subsections, and can be applied to a two-section and multi-section bilateral power supply traction network system structure, as shown in fig. 4.
In some embodiments, fig. 5 is a schematic structural diagram of an AT power supply mode (single-pole) through traction power supply system with neutral section protection according to an embodiment of the present disclosure. Referring to fig. 5, in the AT run-through power supply system, the catenary AT the location of the section includes a left uplink T line, a right uplink T line, a left uplink F line, a right uplink F line, a left downlink T line, a right downlink T line, a left downlink F line, a right downlink F line, and an uplink T line and a downlink T line AT the location of the neutral section; the sectionalizer 101 includes single-pole circuit breakers 1012, the number of the single-pole circuit breakers 1012 being ten; the left uplink T line, the right uplink T line, the left uplink F line, the right uplink F line, the left downlink T line, the right downlink T line, the left downlink F line, the right downlink F line, and the uplink T line and the downlink T line at the neutral section position are respectively connected to the internal bus 100 through corresponding single-pole breakers 1012.
In the embodiment of the present disclosure, the section switch 101 is further modified to replace the bipolar breaker 1011 shown in fig. 4 with a unipolar breaker 1012 to separate the T-line and the F-line, so that the T-line (i.e., contact line) and the F-line (i.e., positive feeder line) can be distinguished from each other by providing the unipolar breaker 1012 for both the traction substation and the AT section.
Therefore, for a more complex AT traction network, a contact network between two traction substations is strictly divided into a plurality of sections according to a T line and an F line, and protection is respectively set, so that the faults of the contact network can be reduced to a controllable range as far as possible, and the reliability and the availability of the whole traction power supply system are improved.
In other embodiments, other types of switches may also be used to connect the left uplink T line, the right uplink T line, the left uplink F line, the right uplink F line, the left downlink T line, the right downlink T line, the left downlink F line, the right downlink F line, and the uplink T line and the downlink T line at the neutral section position to the internal bus 100, respectively, so as to facilitate the differentiation of faults of different section lines.
In the section place provided by the embodiment of the present disclosure, no electric phase splitter is provided at the position of the section place, and the section place includes: an internal bus 100 and a section switch 101; the section switch 101 is connected between the internal bus 100 and the upper and lower lines of the overhead line system at the section position and between the internal bus 100 and the upper and lower lines at the neutral section position to form line section protection and neutral section protection, so that the section applied to the bilateral/through traction power supply system can be arranged between adjacent traction substations; the traditional zoning station/AT station/parallel switch station and the like in the traction power supply system replaced by the subsection station are not arranged in the subsection station, so that the electric phase separation in the traction power supply system is favorably reduced, the train operation efficiency is improved, the reasonable subsection of a contact network is realized, the fault influence range is reduced, and the power supply reliability and flexibility are improved.
On the basis of the above embodiment, the embodiment of the present disclosure further provides a traction power supply system, where the traction power supply system includes any one of the above subsections, and can achieve corresponding beneficial effects.
In some embodiments, with continued reference to any of fig. 3-5, the traction power supply system further includes a traction substation; at least one subsection station is arranged between two adjacent traction substation.
In the embodiment of the disclosure, the number of the sectionalizing stations can be flexibly set according to the distance between the traction substations and the requirements of the contact network sectionalizing, so that a two-section or multi-section traction network structure is formed. Illustratively, each segment of the traction network may have a length of 10km to 20km, may be set in connection with the environment in which it is located, and is not limited by the grade of the line. For example, in a complex and difficult mountain area, a large slope and a heavy-load railway, the length of the single-section traction net can be flexibly set, and is not limited herein.
The traction network can be divided into a plurality of power supplies according to requirements, the incoming and outgoing line circuit breakers of the subsection station are matched with the feeder circuit breakers of the traction substation or the incoming and outgoing line circuit breakers of the adjacent subsection station, optical fiber differential protection can be set, and independent power failure and power transmission of each power supply unit are achieved.
In some embodiments, referring to fig. 3, 4 or 5, in the traction power supply system, two adjacent sets of electrical segments and a neutral segment 102 therebetween are provided at the locations of the segments; wherein the rail locomotive passes through in an unpowered manner at the neutral section 102.
So arranged, can form the neutral section protection at the segmentation to promote train (also called "locomotive") operational safety.
In some embodiments, the neutral section 102 is arranged in both the traction substation and the subsection substation and is configured with neutral section protection, so that the range of through power supply is further expanded, and the train running safety is ensured.
In some embodiments, optical fiber differential protection is arranged between adjacent traction substations and the subsection; and when the segments are adjacently arranged, arranging light differential protection between the adjacent segments.
In the embodiment of the disclosure, in order to improve the operation safety, the following improvements are made:
the first and neutral sections are arranged: neutral sections are arranged in the traction substation and the subsection;
secondly, the locomotive running mode: the neutral section passes through the neutral section in an uninterrupted mode.
Thirdly, protection configuration scheme: the optical fiber differential protection is respectively arranged between the subsection of the traction substation and the adjacent subsection, the upper line and the lower line are separated, and the T, F lines are separated.
By the arrangement, the overhead line system can be divided into a plurality of sections which are independent up and down, so that the fault accurate protection and positioning of the traction network can be realized, and the fault power failure range is greatly reduced; and the selection of the number and the position of the electric sections is flexible and is not limited by conditions such as line gradient and the like.
In the above embodiment, to ensure the operation safety, the locomotive is operated without allowing the live line to run into the dead zone. Thus, the locomotive can not only pass through the subsection station without power failure, but also avoid the risk of running into the dead zone with electricity.
Aiming at the process that the locomotive passes through the electricity subsection dead zone, neutral section protection can be arranged on the neutral section of the contact network electricity subsection, and when the locomotive normally runs, the bus of the subsection supplies power to the neutral section to enable the neutral section to be charged, but no current exists. The locomotive enters the neutral section from the common section or enters the common section from the neutral section, and the risk of running into the dead zone with electricity does not exist in normal operation. When the locomotive runs to a position near the section station and the front contact network trips due to fault, the locomotive normally runs at the moment, the neutral section is powered by the bus of the section, and the locomotive safely enters the neutral section and gets current from the contact network. At the moment, after the circuit breaker of the neutral section of the subsection detects load current, the neutral section protection is started according to a front tripping signal, the neutral section loses power, the locomotive enters a front power failure common section through the neutral section by means of inertia, and the neutral section is safe from a dead zone to a dead zone.
A schematic structural diagram of a traction network with a direct-supply through power supply mode and neutral section protection is shown in fig. 3; in the AT power supply mode, a schematic diagram of a traction network structure with a bipolar multi-stage through power supply and neutral section protection is shown in fig. 4, and a schematic diagram of a traction network structure with a unipolar multi-stage through power supply and neutral section protection is shown in fig. 5. Since the neutral section has no F line, only the neutral section protection is arranged on the T line.
After the neutral section protection is set, the locomotive can run in a neutral phase-splitting-free mode, and a contact network can be divided into mutually independent units.
In summary, the neutral section protection structure provided in the bilateral/through power supply traction network segment proposed in the embodiment of the present disclosure can be divided into two modes, i.e., a direct power supply mode and an AT power supply mode, where the AT power supply mode is further divided into a bipolar breaker mode and a unipolar breaker mode.
Compared with the prior art, the beneficial effects of the embodiment of the disclosure include:
1. firstly, providing a section post of the electrified railway and a wiring type thereof;
2. the section replaces various types of pavilions such as traditional subarea houses, AT houses and parallel switch stations, the traction networks on the left side and the right side of the pavilion can be electrically communicated to achieve in-phase bilateral/through power supply, so that the purposes of canceling electric phase splitting and improving power supply capacity are achieved, meanwhile, the traction networks are flexibly divided into a plurality of mutually independent units, and through protection configuration and matching, independent power cut and transmission of each unit can be achieved, the fault influence range is greatly reduced, and the power supply reliability and flexibility are improved.
3. The problem that the electrified vehicle runs into the dead zone due to the sectional power supply of the contact network is solved.
It is noted that, in this document, 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.
The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A bilateral through power supply section station is characterized in that the bilateral through power supply section station is applied to a bilateral/through traction power supply system and is arranged between adjacent traction power substations;
no electric phase splitting is arranged at the position of the segment; the segments are used for segmenting the traction power supply system to form independent control protection of the segment of the line, and the influence range of traction network faults during bilateral/through power supply is reduced.
2. The sectionalizer of claim 1, wherein the sectionalizer comprises an internal bus bar and a sectionalizer; the overhead line system of the traction power supply system also comprises an electric subsection and a neutral section which are arranged at the position of the subsection;
the section switch is respectively connected between the bus in the station and an upper access line and a lower access line of a contact network of the traction power supply system at the section position and between the bus in the station and the contact network at the neutral section position, so as to form independent control protection of each section of circuit.
3. The sectionalizer of claim 2, wherein the sectionalizer comprises a circuit breaker and associated disconnector and control protection.
4. The staging post of claim 2, wherein in a direct feed thru supply system, overhead lines at the staging post location include a left uplink, a right uplink, a left downlink, a right downlink, and an uplink and a downlink at the neutral position;
the number of the section switches is six, and the section switches are respectively connected between the bus and the left uplink, between the bus and the left downlink, between the bus and the right uplink, between the bus and the right downlink, between the bus and the uplink at the neutral section position and between the bus and the downlink at the neutral section position.
5. The substation of claim 2, wherein in the AT pass-through power supply system, the catenary AT the location of the substation comprises a left uplink T-line, a right uplink T-line, a left uplink F-line, a right uplink F-line, a left downlink T-line, a right downlink T-line, a left downlink F-line, a right downlink F-line, and an uplink T-line and a downlink T-line AT the location of the neutral section;
section switch includes dipole, monopole circuit breaker, dipole, monopole circuit breaker's quantity is six, and the ascending T line inlet wire in left side and the ascending F line inlet wire of going up are connected to the bus in institute through same dipole circuit breaker, and the ascending T line inlet wire in right side and the ascending F line inlet wire of going up are connected to the bus in institute through same dipole circuit breaker, and the descending T line inlet wire in left side and the descending F line inlet wire of going down are connected to the bus in institute through same dipole circuit breaker, and the descending T line inlet wire in right side and the descending F line inlet wire of going down are connected to the bus in institute through same dipole circuit breaker, and the ascending T line of neutral section position department is connected to the bus in institute through a monopole circuit breaker, and the descending T line of neutral section position department is connected to the bus in institute through a monopole circuit breaker.
6. The substation of claim 2, wherein in the AT pass-through power supply system, the catenary AT the location of the substation comprises a left uplink T-line, a right uplink T-line, a left uplink F-line, a right uplink F-line, a left downlink T-line, a right downlink T-line, a left downlink F-line, a right downlink F-line, and an uplink T-line and a downlink T-line AT the location of the neutral section;
the section switch comprises single-pole circuit breakers, and the number of the single-pole circuit breakers is ten: the left side goes up T line inlet wire, right side upward T line inlet wire, left side upward F line inlet wire, right side upward F line inlet wire, left side downward T line inlet wire, right side downward T line inlet wire, left side downward F line inlet wire, right side downward F line inlet wire and the last T line and the down T line of neutral section position department are connected to institute's generating line through corresponding monopole breaker respectively.
7. A traction power supply system comprising a subsection as claimed in any of claims 1 to 6.
8. The traction power supply system according to claim 7, further comprising a traction substation;
at least one subsection station is arranged between two adjacent traction substation.
9. A traction power supply system as claimed in claim 8, wherein two adjacent sets of electrical sections and a neutral section therebetween are provided at the location of the sections;
wherein the rail locomotive passes through at the neutral section in an uninterruptible manner.
10. The traction power supply system according to claim 8, wherein a fiber differential protection is provided between adjacent traction substations and the segment substation; and
when the segments are adjacently arranged, light differential protection is arranged between the adjacent segments.
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| CN202111248635.XA CN113978321A (en) | 2021-10-26 | 2021-10-26 | Bilateral through power supply subsection station and traction power supply system |
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