CN110857039B - Contact net anchor section joint power supply conversion method and system - Google Patents
Contact net anchor section joint power supply conversion method and system Download PDFInfo
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- CN110857039B CN110857039B CN201810968791.5A CN201810968791A CN110857039B CN 110857039 B CN110857039 B CN 110857039B CN 201810968791 A CN201810968791 A CN 201810968791A CN 110857039 B CN110857039 B CN 110857039B
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Abstract
The embodiment of the invention provides a power supply conversion method and a power supply conversion system for an anchor section joint of a contact network, which are applicable to a high-reliability contact network excessive continuous power supply system, wherein a parallel section area with a preset length in the anchor section joint of the contact network is obtained, and two ends of each contact wire in the parallel section area are respectively provided with a conventional stressed dropper; according to the size of the preset length, the auxiliary hanging strings are arranged at the preset positions on each contact wire in the parallel section area respectively, so that all the contact wires in the parallel section area are equal in height in a vertical plane, the parallel section area is changed into the parallel section area and the like, the over-current phase-splitting conversion of the train can be realized when the train passes through the anchor section joint of the contact network, the live-line conversion of the train when the train passes through the anchor section joint of the contact network is ensured, continuous power is provided for the train, and the danger of the train caused by the loss of power is avoided.
Description
Technical Field
The embodiment of the invention relates to the technical field of traction power supply of an electrified railway contact network, in particular to a power supply conversion method and system for an anchor section joint of the contact network.
Background
At present, an electrified railway contact network is an overhead power grid for providing power for train operation, a contact wire in the contact network is in contact with a pantograph on a train in a high-speed movement process in a relatively parallel sliding mode, and current and power conduction is realized through proper pressure between the pantograph and the contact wire. In order to overcome the influence of natural temperature change on the internal tension and the geometric parallel position state of the overhead contact line, the structure of the anchor section joint is adopted, when a train passes through the anchor section joint, a pantograph can be smoothly and safely transited from one anchor section to another anchor section, the contact of a pantograph line is good, and the current taking is normal. One of the structural characteristics of the anchor section joint is that two horizontal contact wires which can be contacted by the pantograph simultaneously are arranged, so that the electrified contact wires at two ends are simultaneously lapped at the moment when the pantograph of the train passes through on the premise that the anchor sections are mechanically separated from each other and electrically isolated from each other in a segmented manner, and the conduction of electric power and the continuous transmission of electric energy of the train are realized.
The power supply mode of electrified railway contact network electricity split phase anchor section joint or normally open insulating anchor section joint department that adopts among the prior art belongs to the outage conversion, and the in-process that the train passes through another anchor section by an anchor section does not have the electric energy supply promptly, leads to the time quantum that can not have power to appear in the train operation in-process, and in this time quantum, the train can rely on inertia to continue to move ahead, but speed can greatly reduced, and be the great region of slope between two anchor sections, then probably lead to the anchor section joint between two anchor sections that the train can't pass through smoothly because of power is not enough, cause the accident.
Disclosure of Invention
In order to overcome the above problems or at least partially solve the above problems, embodiments of the present invention provide a method and a system for power supply conversion of an anchor section joint of a contact network, which reliably realize conversion of power supplies of different anchor sections when a contact network power split phase continuous power supply system is adopted.
On the one hand, the embodiment of the invention provides a power supply conversion method for an anchor section joint of a contact network, which comprises the following steps:
s1, acquiring a parallel section area with a preset length in an anchor section joint of the contact net, and respectively arranging conventional stressed hanging strings at two ends of each contact wire in the parallel section area; the parallel section area is an area in which two contact wires in the anchor section joint of the contact network are parallel to each other in a horizontal plane;
and S2, respectively arranging auxiliary hanging strings at preset positions on each contact wire in the parallel section area according to the preset length, so that all the contact wires in the parallel section area have the same height in a vertical plane, and changing the parallel section area into a parallel section equal-height area.
On the other hand, the embodiment of the invention provides a power supply conversion system for an anchor section joint of a contact network, which comprises the following components: a conventional stressed dropper setting module and an auxiliary dropper setting module. Wherein,
the conventional stressed dropper setting module is used for acquiring a parallel section area with a preset length in an anchor section joint of the contact network, and respectively setting conventional stressed droppers at two ends of each contact wire in the parallel section area; the parallel section area is an area in which two contact wires in the anchor section joint of the contact network are parallel to each other in a horizontal plane;
and the auxiliary dropper setting module is used for respectively setting an auxiliary dropper at a preset position on each contact wire in the parallel section area according to the preset length, so that all the contact wires in the parallel section area have the same height in a vertical plane, and the parallel section area is changed into a parallel section equal-height area.
According to the power supply conversion method and system for the anchor section joint of the contact network, the parallel section area with the preset length in the anchor section joint of the contact network is obtained, and the two ends of each contact wire in the parallel section area are respectively provided with a conventional stressed dropper; according to the size of the preset length, the auxiliary hanging strings are arranged at the preset positions on each contact wire in the parallel section area respectively, so that all the contact wires in the parallel section area are equal in height in a vertical plane, the parallel section area is changed into the parallel section area and the like, the over-current phase-splitting conversion of the train can be realized when the train passes through the anchor section joint of the contact network, the live-line conversion of the train when the train passes through the anchor section joint of the contact network is ensured, continuous power is provided for the train, and the danger of the train caused by the loss of power is avoided.
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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a power supply conversion method for an anchor segment joint of a contact network according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a high area such as a parallel section of an anchor segment joint of a contact network in a horizontal plane in a power supply conversion method for the anchor segment joint of the contact network provided by the embodiment of the invention;
fig. 3 is a schematic structural view of a high area such as a parallel section of an anchor segment joint of the contact network in a vertical plane in the power supply conversion method for the anchor segment joint of the contact network provided by the embodiment of the invention;
fig. 4 is a schematic view of an overall structure of a contact network anchor segment joint in the contact network anchor segment joint power supply conversion method provided by the embodiment of the invention;
fig. 5 is a schematic detailed structural diagram of a contact network anchor segment joint in the contact network anchor segment joint power supply conversion method provided by the embodiment of the invention;
fig. 6 is a schematic structural diagram of a power supply conversion system for an anchor segment joint of a contact network according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present 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.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
Because the power supply mode of electrified railway contact net anchor section joint department that adopts among the prior art belongs to the outage conversion, can lead to very easily appearing the time quantum that does not have power in the train operation process, and in this time quantum, the train can rely on inertia to continue to move ahead, but speed can greatly reduced, is the great region of slope moreover between two anchor sections, then can lead to the train to pass through the anchor section joint between two anchor sections smoothly because of power is not enough, causes the accident.
Therefore, in order to solve the technical problems, in the embodiment of the invention, a system based on the principle of a current transformation technology, such as an automatic electrified railway ground neutral section, a contact network neutral section continuous power supply system or an electrified railway ground neutral section flexible power supply system, is adopted to supply power to a train, and a power conversion section with enough length and equal height and overlapped in parallel is required to be arranged, namely the parallel section is required to be ensured to be equal height on a vertical plane. The anchor section joint with the special structure simultaneously needs to meet corresponding national and industrial standards and existing operation and maintenance habits. However, due to the adoption of power-off conversion in the prior art, the horizontal plane of the joint of the general anchor section of the contact network is provided with parallel sections, but the vertical plane of the joint is provided with unequal heights, so that the power supply mode of the overvoltage phase separation of the contact network cannot be realized. Therefore, the invention provides a power supply conversion method for the anchor section joint of the contact network.
As shown in fig. 1, the invention provides a power supply conversion method for an anchor segment joint of a contact network, which comprises the following steps:
s1, acquiring a parallel section area with a preset length in an anchor section joint of the contact net, and respectively arranging conventional stressed hanging strings at two ends of each contact wire in the parallel section area; the parallel section area is an area in which two contact wires in the anchor section joint of the contact network are parallel to each other in a horizontal plane;
and S2, respectively arranging auxiliary hanging strings at preset positions on each contact wire in the parallel section area according to the preset length, so that all the contact wires in the parallel section area have the same height in a vertical plane, and changing the parallel section area into a parallel section equal-height area.
Specifically, the parallel section area in the anchor section joint of the contact network mentioned in the embodiment of the present invention refers to an area where two contact wires in the anchor section joint of the contact network are parallel to each other in a horizontal plane, and the two contact wires in this area are usually not of equal height on a vertical plane. It should be noted that the preset length is a horizontal linear distance. As shown in fig. 2 and 3, fig. 2 is a schematic structural view of a high area such as a parallel section selected in an embodiment of the present invention in a horizontal plane, and fig. 3 is a schematic structural view of a high area such as a parallel section obtained in an embodiment of the present invention in a vertical plane. As can be seen from (a) and (b) in fig. 2, the lengths of the high region 11 such as the parallel section and the high region 12 such as the parallel section are not fixed, but are reasonably set according to the specific structure of the anchor segment joint of the actual catenary, which is not particularly limited in the embodiment of the present invention. As can be seen from fig. 3, the two contact wires in the parallel-segment equal-height area 13 coincide in the vertical plane, i.e. the two contact wires are illustrated as being equal-height in the parallel-segment equal-height area 13.
Arranging conventional stressed hanging strings at two ends of two contact wires in a parallel section area with a preset length respectively; namely, the two ends of the first contact wire are respectively provided with a conventional stressed dropper, and the two ends of the second contact wire are also respectively provided with a conventional stressed dropper.
And respectively arranging an auxiliary dropper at a preset position on each contact wire in the parallel section area according to the determined preset length, so that all the contact wires in the parallel section area have the same height in a vertical plane, and changing the parallel section area into a parallel section equal-height area. It should be noted that, in order to implement the power supply conversion of the overvoltage phase in the anchor section joint of the contact network, the embodiment of the invention needs to ensure that the two contact wires are parallel in the horizontal plane and also need to be equal in height in the vertical plane, so that the two contact wires in the parallel section area can be equal in height in the vertical plane by respectively arranging the auxiliary dropper at the preset positions on the two contact wires in the parallel section area, that is, the parallel section area is changed into the high area such as the parallel section, and the power supply conversion of the overvoltage phase in the anchor section joint of the contact network can be implemented. The number of the preset positions on the two contact wires in the parallel section area is also not fixed due to different preset lengths, and one or more than one preset positions can be arranged, so that the number of the auxiliary hanging strings arranged in the parallel section area is also not fixed.
The purpose of arranging the auxiliary hanger in the embodiment of the invention comprises the following steps: 1) the auxiliary hanging strings are arranged to ensure that the parallel section area is changed into a parallel section equal-height area; 2) by arranging the auxiliary suspension strings, when any one of the normal stressed suspension strings at the two ends of each contact wire in the parallel section area breaks down, the normal operation of the train on the two contact wires can still be ensured.
In the embodiment of the invention, a parallel section area with a preset length in an anchor section joint of a contact network is obtained, and two ends of each contact wire in the parallel section area are respectively provided with a conventional stressed dropper; and according to the size of the preset length, the auxiliary hanger is arranged at the preset position on each contact wire in the parallel section area respectively, so that all the contact wires in the parallel section area are equal in height in a vertical plane, the parallel section area is changed into the parallel section equal-height area, the over-current phase-splitting conversion of the train can be realized when the train passes through the anchor section joint of the contact network, the live-line conversion of the train when the train passes through the anchor section joint of the contact network is ensured, continuous power is provided for the train, and the danger of the train possibly occurring due to the loss of the power is avoided.
On the basis of the above embodiment, in the power supply conversion method for the anchor segment joint of the contact network provided in the embodiment of the present invention, the anchor segment joint of the contact network includes two equal-height areas of the parallel segments, so as to ensure that two times of power supply conversion are completed in the anchor segment joint of the contact network.
Specifically, as shown in fig. 4, a parallel section equal-height area 41 is arranged at an entrance of the contact network anchor section joint, a parallel section equal-height area 42 is arranged at an exit of the contact network anchor section joint, and the parallel section equal-height area 41 and the parallel section equal-height area 42 respectively complete one-time power supply conversion, so that a train can be guaranteed to have power support in the contact network anchor section joint, and can also be guaranteed to normally run after passing through the whole contact network anchor section joint. The parallel segment equal-height regions 41 and the parallel segment equal-height regions 42 are parallel segment regions where the two contact wires are parallel in the horizontal plane and equal-height in the vertical plane.
On the basis of the above embodiment, only the equal-height areas of the parallel sections in the anchor section joint of the overhead contact system in the embodiment of the invention are charged, and the other areas are neutral sections without electricity.
On the basis of the foregoing embodiment, S2 in the contact network anchor segment joint power supply conversion method provided in the embodiment of the present invention specifically includes:
if the preset length is smaller than or equal to the target length, respectively arranging an auxiliary hanger at the central position of each contact wire in the parallel section area;
and if the preset length is greater than the target length, determining the preset position according to a preset condition, and setting an auxiliary hanger at the preset position, wherein the preset condition is determined according to an engineering standard.
Specifically, since the length of the dynamic lap joint of the pantograph of the train passing through the anchor section joint of the overhead line system is not more than 10m, the target length is set to be 20m in the embodiment of the invention, when the preset length of the parallel section area is less than or equal to 20m, an auxiliary dropper is arranged on each contact wire in the parallel section area, the specific position of the auxiliary dropper can be arranged at the central position of each contact wire, and the central position is the preset position. As shown in fig. 5, fig. 5 is a schematic structural view of an anchor segment joint of a contact line provided in an embodiment of the present invention, in which only one parallel segment region is taken as an example for description. As can be seen from fig. 5, on the first contact wire, a normal force receiving dropper 51 and a normal force receiving dropper 52 are respectively disposed at both ends of the parallel section area, and an auxiliary dropper 53 is disposed at the center of the parallel section area of the first contact wire. On the second contact wire, a normal force-receiving dropper 54 and a normal force-receiving dropper 55 are provided at both ends of the parallel section area, and an auxiliary dropper 56 is provided at the center of the parallel section area of the second contact wire. For example, the preset length is 15m, which is less than the target length 20m, and an auxiliary dropper may be disposed at the center of the parallel segment area of each contact wire, i.e., the auxiliary dropper is at the same distance from the normally-stressed dropper at the two ends of the contact wire.
When the preset length is greater than the target length, the requirement of engineering standard cannot be met only by arranging one auxiliary hanger at the center position of each contact wire in the parallel section area, because the engineering standard requires that the distance between the two hangers is not greater than 10m, and when the preset length is greater than the target length, the distance between the auxiliary hanger and any normally stressed hanger is greater than 10 m. In this case, therefore, the embodiment of the present invention first determines the preset position according to the preset condition, and then sets the auxiliary dropper at the preset position to ensure that the distance between the two droppers is not more than 10 m.
The number N of the preset positions on each contact wire in the parallel section area can be determined according to the following formula, and N preset positions are determined on each contact wire at equal distances;
wherein N is the number of the predetermined positions on each contact wire, D1 is the predetermined length, and [ ] represents an integer no greater than.
For example, if the preset length is 30m, N is 3, that is, the number of preset positions on each contact wire is 3, 3 preset positions are determined at equal distances on each contact wire, and the auxiliary dropper is disposed at the 3 preset positions. At this time, an auxiliary hanger may be first provided at a central position of each contact wire, and then an auxiliary hanger may be provided at positions 7-8m on both sides of the auxiliary hanger.
On the basis of the embodiment, the preset length is determined according to the maximum running speed of the train and the preset power supply conversion time.
Specifically, when a train starts to enter an originally neutral section without electricity (i.e. an anchor section joint of a contact line), in order not to interrupt train power transmission, the ground automatic neutral section passing-through system needs to provide power for the neutral section. In order to complete the same-phase smooth conversion or other electric energy conversion between external power supplies with different phase sequences in a charged state, a certain power supply conversion time t is required. Therefore, the length (i.e. preset length) L of a high-section area such as a parallel section in the anchor section joint of the catenary is determined by the maximum train running speed and the preset power supply conversion time, and is specifically calculated by the following formula:
L＝Vmax×t/3600；
wherein, L is a preset length, the unit is m, t is power supply conversion time, the unit is ms, Vmax is the maximum running speed of the train, and the unit is km/h. The power supply conversion time t is determined according to the control principle of the ground automatic over-current phase splitting system.
The embodiment of the invention provides a calibration method which can be realized by presetting a length L: according to a catenary state equation of state of the catenary, a lead deforms under the condition of tension due to gravity sag, and if the dynamic current-receiving performance is not considered, a static parallel section can be lengthened (as long as the insulation lifting space is not influenced) at will according to the power conversion and operation speed requirements, for example, the cross section area of 25kN tension under the span of 50m is 150mm2When the lifting amount of the contact wire at the suspension points at the two ends is controlled to meet a certain requirement (80-150 mm), the theoretical height of the contact wire in the high area such as the maximum parallel section of the single sideThe length L/2 can be set to 14m, so that the so-called static parallel overlap range, in which the actual pantograph contacts both wires simultaneously, can reach at most 2 × 14 to 28 (m). At a speed of 200km/h, the wire tension is usually smaller, for example 15-20 kN, and the range of parallel sections which can be achieved from the allowable natural geometry can be larger (without considering the design specification requirement of the spacing between the hanging strings). Although dynamic lifting of a pantograph of a train can cause actual lengthening of a dynamic value of a parallel section range, the specific lifting amount is related to the performance of the pantograph, the current working state and multiple factors of pantograph-catenary matching, the length of the range which is lengthened when the pantograph passes each time cannot be known in advance and is used as an uncontrollable amount and cannot be used as specific data of system input control, and therefore the dynamic lifting of the pantograph of the train is only suitable for being used as a margin value. As control system parameters, only static values should be considered.
On the basis of the above embodiment, in the power supply conversion method for the anchor segment joint of the overhead contact line provided in the embodiment of the present invention, the preset length is less than or equal to 40m, that is, it can be ensured that the high area, such as the parallel segment, is long enough in a static geometric state, from 2 × 10m to 2 × 15m, and can be implemented to 2 × 20m at most, and the time for overlapping two contact wires in the high area, such as the parallel segment, when the pantograph at a speed of 350km/h passes through the anchor segment joint of the overhead contact line is longer than or equal to 300 ms.
On the basis of the above embodiment, the value range of the preset power supply conversion time in the power supply conversion method for the anchor segment joint of the overhead line system provided in the embodiment of the present invention is 80 to 300 ms. When a power supply conversion control device adopted in the ground automatic over-voltage phase-splitting system is a power electronic control device, the power supply conversion time is usually controlled to be 100 ms; if the adopted power supply conversion control device is a mechanical switch type conversion device, the power supply conversion time needs to reach 300ms, the running distance corresponding to 1000ms (1s) is about 97.2m by taking a train with the maximum running speed of 350km/h as an example, and when the longest power supply conversion time is adopted for 300ms, the length of a high area such as a parallel section corresponding to each contact line anchor section joint is about 29 m.
According to the power supply conversion method for the anchor section joint of the contact network, provided by the embodiment of the invention, the space between the hanging strings is ensured to meet the requirement of design specifications by setting the virtual hanging strings, other parameters are not required to be changed, the requirements of engineering technical elements of the basic structure of the anchor section joint are met, and the requirements of industrial specifications and management regulations are met.
On the basis of the embodiment, the distance between two contact wires in the anchor section joint of the contact network in the power supply conversion method of the anchor section joint of the contact network in the horizontal plane is 0.45 m. I.e. the distance between two contact wires in fig. 2 (a).
As shown in fig. 6, on the basis of the above embodiment, an embodiment of the present invention further provides a power supply conversion system for an anchor segment joint of a contact line, including: a conventional stressed dropper set-up module 61 and an auxiliary dropper set-up module 62. Wherein,
the conventional stressed dropper setting module 61 is used for acquiring a parallel section area with a preset length in an anchor section joint of the contact network, and respectively setting conventional stressed dropper at two ends of each contact wire in the parallel section area; the parallel section area is an area in which two contact wires in the anchor section joint of the contact network are parallel to each other in a horizontal plane;
the auxiliary dropper setting module 62 is configured to set an auxiliary dropper at a preset position on each contact wire in the parallel section area according to the preset length, so that all the contact wires in the parallel section area have equal height in a vertical plane, and the parallel section area is changed into a parallel section equal-height area.
On the basis of the above embodiment, the auxiliary dropper setting module 62 is specifically configured to:
if the preset length is smaller than or equal to the target length, respectively arranging an auxiliary hanger at the central positions of the two contact wires corresponding to the parallel section area;
and if the preset length is greater than the target length, determining the preset position according to a preset condition, and setting an auxiliary hanger at the preset position, wherein the preset condition is determined according to an engineering standard.
Specifically, the functions and operation flows of the modules in the power supply conversion system for the anchor segment joint of the overhead contact system provided in the embodiment of the present invention correspond to the operation flows in the above method embodiments one to one, and are not described herein again in the embodiment of the present invention.
According to the power supply conversion system for the anchor section joint of the contact network, which is provided by the embodiment of the invention, a parallel section area with a preset length in the anchor section joint of the contact network is obtained through a conventional stressed dropper setting module, and conventional stressed droppers are respectively arranged at two ends of each contact wire in the parallel section area; and the auxiliary hanger is arranged at the preset position on each contact wire in the parallel section area respectively through the auxiliary hanger setting module according to the preset length, so that all the contact wires in the parallel section area are equal in height in a vertical plane, the parallel section area is changed into the parallel section equal-height area, the over-current phase-splitting conversion of a train can be realized when the train passes through the anchor section joint of the contact network, the live conversion of the train when the train passes through the anchor section joint of the contact network is ensured, continuous power is provided for the train, and the danger possibly caused by the loss of the power of the train is avoided.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A power supply conversion method for an anchor section joint of a contact network is characterized by comprising the following steps:
s1, acquiring a parallel section area with a preset length in an anchor section joint of the contact net, and respectively arranging conventional stressed hanging strings at two ends of each contact wire in the parallel section area; the parallel section area is an area in which two contact wires in the anchor section joint of the contact network are parallel to each other in a horizontal plane;
s2, respectively arranging auxiliary hanging strings at preset positions on each contact wire in the parallel section area according to the preset length, so that all the contact wires in the parallel section area have equal height in a vertical plane, and the parallel section area is changed into a parallel section equal-height area; the contact net anchor section joint comprises two parallel sections in equal height areas so as to ensure that the contact net anchor section joint completes two times of power supply conversion.
2. The power supply conversion method for the anchor segment joint of the overhead line system of claim 1, wherein the S2 specifically comprises:
if the preset length is smaller than or equal to the target length, respectively arranging an auxiliary hanger at the central position of each contact wire in the parallel section area;
and if the preset length is greater than the target length, determining the preset position according to a preset condition, and setting an auxiliary hanger at the preset position, wherein the preset condition is determined according to an engineering standard.
3. The power supply conversion method for the anchor segment joint of the overhead line system according to claim 2, wherein if the preset length is greater than the target length, the preset position is determined according to a preset condition, and specifically comprises:
if the preset length is larger than the target length, determining the number N of the preset positions on each contact wire in the parallel section area according to the following formula, and determining N preset positions on each contact wire at equal distances;
wherein N is the number of the predetermined positions on each contact wire, D1 is the predetermined length, and [ ] represents an integer no greater than.
4. The power supply conversion method for the anchor segment joint of the overhead line system according to claim 1, wherein the preset length is determined according to the maximum running speed of the train and the preset power supply conversion time.
5. The power supply conversion method for the anchor section joint of the overhead line system according to claim 4, wherein the preset power supply conversion time is 80-300 ms.
6. The method for converting the power supply to the anchor segment joint of the overhead line system of any one of claims 1 to 5, wherein the preset length is less than or equal to 40 m.
7. The power supply conversion method for the anchor segment joint of the contact net according to any one of claims 1 to 5, wherein the distance between two contact wires in the anchor segment joint of the contact net in a horizontal plane is 0.45 m.
8. The utility model provides a contact net anchor segment joint power supply switching system which characterized in that includes:
the system comprises a conventional stressed dropper setting module, a normal stressed dropper setting module and a control module, wherein the conventional stressed dropper setting module is used for acquiring a parallel section area with a preset length in an anchor section joint of a contact network, and respectively setting conventional stressed droppers at two ends of each contact wire in the parallel section area; the parallel section area is an area in which two contact wires in the anchor section joint of the contact network are parallel to each other in a horizontal plane;
the auxiliary dropper setting module is used for respectively setting an auxiliary dropper at a preset position on each contact wire in the parallel section area according to the preset length, so that all the contact wires in the parallel section area have the same height in a vertical plane, and the parallel section area is changed into a parallel section equal-height area; the contact net anchor section joint comprises two parallel sections in equal height areas so as to ensure that the contact net anchor section joint completes two times of power supply conversion.
9. The overhead line system anchor section joint power supply conversion system of claim 8, wherein the auxiliary hanger setting module is specifically configured to:
if the preset length is smaller than or equal to the target length, respectively arranging an auxiliary hanger at the central position of each contact wire in the parallel section area;
and if the preset length is greater than the target length, determining the preset position according to a preset condition, and setting an auxiliary hanger at the preset position, wherein the preset condition is determined according to an engineering standard.
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| CN201810968791.5A CN110857039B (en) | 2018-08-23 | 2018-08-23 | Contact net anchor section joint power supply conversion method and system |
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| CN201810968791.5A CN110857039B (en) | 2018-08-23 | 2018-08-23 | Contact net anchor section joint power supply conversion method and system |
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| JPS5799425A (en) * | 1980-12-15 | 1982-06-21 | Matsushita Electric Works Ltd | Point switch mechanism for insulated trolley wire |
| CN102358211A (en) * | 2011-09-02 | 2012-02-22 | 中铁电气化局集团第二工程有限公司 | Installation construction method of electrified railway contact network anchored section joint hanger |
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