JP2019117085A - Ground fault positioning method and ground fault positioning system - Google Patents

Abstract

To provide a ground fault positioning method capable of easily positioning ground fault when a ground fault occurs, while reducing installation cost of a ground fault positioning device.SOLUTION: A propulsion coil device PD includes a plurality of propulsion coil groups 8. The propulsion coil group 8 includes a plurality of propulsion coils 7. The propulsion coil 7 includes a conductor 9a and a semiconductive layer 9c. The conductor 9a is connected across the plurality of propulsion coil groups 8, the semiconductive layer 9c is connected for each propulsion coil group 8, and the plurality of semiconductive layers 9c form a semiconductive layer group 16 for each propulsion coil group 8, and the semiconductive layer group 16 is grounded via a connecting wire 17 for each propulsion coil group 8. The potential of the semiconductive layer group 16 or the current flowing through the connecting wire 17 is measured for each propulsion coil group 8 to locate the ground fault position.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a ground fault positioning method and system for positioning a ground fault when a ground fault occurs in a propulsion coil device provided on a track along which a linear synchronous motor type vehicle travels.

  As a magnetically levitated railway, a ground linear synchronous motor (LSM) system is used in which a field coil is provided on a vehicle traveling on a track and a propulsion coil as an armature coil is provided on the track. There is what I had. For example, as a ground fault positioning method for locating a ground fault position when a propulsion coil in a magnetic levitation type railway using this LSM system, ie, a propulsion coil provided on a track on which a linear synchronous motor type vehicle travels, is ground faulted, for example There is a method of positioning the ground fault position based on the resonance frequency of the current flowing through the propulsion coil when the ground fault occurs.

  Japanese Patent Laid-Open No. 2004-343883 (Patent Document 1) discloses an inverter for outputting three-phase AC power, a three-phase feeding cable, and a plurality of feeds connected to the three-phase feeding cable via a feeding division switch. A ground fault of the LSM feeding circuit consisting of an electric section three-phase propulsion coil, an output filter with one end connected to the output terminal of the inverter and the other end grounded, and a control device for controlling the opening and closing of the feeding section switch. A technique is disclosed relating to a method of locating a ground point for magnetically levitated railways that locates a point.

Further, in the above-mentioned Patent Document 1, in the method of locating a ground point for magnetic levitation railway, an output filter, a three-phase feeder cable, and a ground fault have occurred when a ground fault has occurred and the inverter has gated. The electric section three-phase propulsion coil, and the resonant frequency f _n of the sound phase of the closed circuit formed by the ground and the resonance frequency f _f of the non-healthy phase from one end of the electric section three-phase propulsion coil to the ground point A technique for determining the distance x _c is disclosed.

  In addition, sensor technology represented by IoT is rapidly advancing, and there are remarkable improvements in performance and cost reduction of a single sensor, and there are many sensor applications, such as those that have been considered impossible in the past, such as railways It is becoming possible to arrange and use it for maintenance.

Unexamined-Japanese-Patent No. 2004-343883

  In the track of the magnetic levitation railway, a floating guide coil is provided on the side surface of the side wall via a propulsion coil, and the propulsion coil can not be observed directly by visual observation. Therefore, it may be difficult to determine which propulsion coil is grounded.

  Here, in the case of supplying power to the transmission line, a method of locating the ground position based on the time required for the surge waveform of the current when the ground fault occurs to propagate is used, that is, the method by the synchrophasor be able to. However, it is difficult to use the same method when supplying power to the propulsion coils provided on the track of the Maglev railway. This is because it is difficult to measure and acquire a surge waveform with high accuracy because there is a difference in characteristic impedance between the propulsion coil main body and the connection cable. In addition, even if a highly accurate surge waveform is measured, the position difference is difficult because the time difference between the waveforms measured at the two points is extremely short.

  On the other hand, in the ground fault positioning method described in Patent Document 1 above, calculation is performed using the resonant frequency measured for the current flowing through the propulsion coil, and from one end of the feeding section three-phase propulsion coil to the ground fault point To determine the distance of However, since the method described in Patent Document 1 is a complicated method, the accuracy of the positioning position may decrease, and the ground cost may be reduced while the installation cost of the ground fault position determining apparatus is reduced. It is desirable to provide a ground fault location method that can easily locate a fault location. Further, the above-described problem is not limited to the magnetic levitation type railways, but is common to railways on which linear synchronous motor type vehicles travel.

  The present invention has been made to solve the problems of the prior art as described above, and is a ground fault in a propulsion coil device provided on a track on which a linear synchronous motor type vehicle travels. Abstract: A ground fault positioning method capable of easily locating a ground fault position when a ground fault occurs while reducing the installation cost of a ground fault position locating device in a ground fault position locating method of locating a position is provided. The purpose is

  The outline of typical ones of the inventions disclosed in the present application will be briefly described as follows.

  The ground fault positioning method according to one aspect of the present invention is a ground fault positioning method for locating a ground fault position when a ground fault occurs in a propulsion coil device provided on a track on which a linear synchronous motor vehicle travels. is there. In the ground fault localization method, the propulsion coil device includes a plurality of propulsion coil groups arranged along a trajectory, and each of the plurality of propulsion coil groups is a plurality of first propulsion coils arranged along the trajectory And each of the plurality of first propulsion coils includes a first conductor, a first insulator covering the first conductor, and a first semiconductive layer covering the first insulator. The plurality of first conductors respectively included in each of the plurality of first propulsion coils are electrically connected to each other in series across the plurality of propulsion coil groups, and are respectively included in each of the plurality of first propulsion coils. The first semiconductive layer is electrically connected to each other for each propulsion coil group, and the plurality of first semiconductive layers electrically connected to each other for each propulsion coil group makes the semiconductive layer group for each propulsion coil group The formed semiconductive layer group is grounded via the first connection line for each propulsion coil group. And the said ground fault location method measured the electric potential of a semiconductive layer group, or the electric current which flows through a 1st connection line for every propulsion coil group, and the ground fault generate | occur | produced based on the measured value measured. Determine the location of the ground fault.

  In another embodiment, the method for positioning a ground fault according to the present invention includes the step (a) of measuring the potential of the semiconductive layer group or the current flowing through the first connection line for each propulsion coil group. Good. The ground fault localization method compares the measured value measured in step (a) with a reference value, and when the measured value is less than or equal to the reference value, a ground fault occurs in the propulsion coil group in which the measured value is measured. It may be determined that it has not occurred, and when the measured value exceeds the reference value, it may be determined that a ground fault has occurred in the propulsion coil group in which the measured value is measured (b). In the ground fault positioning method, the position of the propulsion coil group determined in step (b) to be a ground fault is determined as the ground fault position, thereby locating the ground fault position when the ground fault occurs. (C) may be included.

  Moreover, as another aspect, any two semiconductive layer groups may not be electrically connected to each other.

  In another aspect, the propulsion coil device includes a ground line extending along the track and grounded, and the semiconductive layer group is grounded via the first connection line for each propulsion coil group. By being electrically connected to the wire, each propulsion coil group may be grounded via the first connection wire and the ground wire.

  Further, as another aspect, among the plurality of propulsion coil groups, the propulsion coil group disposed on the side closest to the power supply unit for supplying power to the propulsion coil device is used as a first end propulsion coil group, When the propulsion coil group disposed on the side farthest from the power supply unit among the propulsion coil groups is a second end propulsion coil group, the number of first propulsion coils included in the second end propulsion coil group is It may be larger than the number of first propulsion coils included in the one end propulsion coil group.

  In another aspect, each of the plurality of propulsion coil groups includes a plurality of first propulsion coils and a plurality of second propulsion coils alternately arranged along the track, and a plurality of second propulsion coils. Each may include a second conductor, a second insulator covering the second conductor, and a second semiconductive layer covering the second insulator. The plurality of second conductors respectively included in each of the plurality of second propulsion coils are electrically connected to each other in series across the plurality of propulsion coil groups, and are included in each of the plurality of first propulsion coils. The first semiconductive layer and the plurality of second semiconductive layers respectively included in each of the plurality of second propulsion coils are electrically connected to each other for each propulsion coil group, and are electrically connected to each other for each propulsion coil group The plurality of connected first semiconductive layers and the plurality of second semiconductive layers may form a semiconductive layer group for each propulsion coil group.

  The ground fault positioning method according to one aspect of the present invention is a ground fault positioning method for locating a ground fault position when a ground fault occurs in a propulsion coil device provided on a track on which a linear synchronous motor vehicle travels. is there. In the ground fault localization method, the propulsion coil device includes a plurality of propulsion coil groups arranged along a trajectory, and each of the plurality of propulsion coil groups is a plurality of first propulsion coils arranged along the trajectory And each of the plurality of first propulsion coils includes a first conductor, a first insulator covering the first conductor, and a first semiconductive layer covering the first insulator. The plurality of first conductors respectively included in each of the plurality of first propulsion coils are electrically connected to each other in series across the plurality of propulsion coil groups, and are respectively included in each of the plurality of first propulsion coils. The first semiconductive layer is electrically connected to each other for each propulsion coil group, and the plurality of first semiconductive layers electrically connected to each other for each propulsion coil group makes the semiconductive layer group for each propulsion coil group It is formed. An end half which is a semiconductive layer group formed in an end propulsion coil group which is a propulsion coil group disposed at a first end of a first side in a first array formed by a plurality of propulsion coil groups The conductive layer group is grounded to the ground point via the first connection line, and the propulsion coil device further electrically connects between each of the plurality of semiconductive layer groups respectively formed on each of the plurality of propulsion coil groups. And a plurality of second connection lines connected in an orderly manner. And the said ground fault location method measures the electric current which flows through each of the 1st connection line and a plurality of 2nd connection lines, and based on the measured value measured, the ground fault position when a ground fault occurs is determined. Standardize.

  In another aspect, the ground fault localization method measures a first current value flowing through the first connection line and a plurality of second current values flowing respectively through the plurality of second connection lines a) It may have a step. In addition, the ground fault position locating method compares the first current value measured in step (a) with the first reference value, and each of the plurality of second current values measured in step (a) When the first current value is less than or equal to the first reference value and any of the plurality of second current values is less than or equal to the second reference value in comparison with the reference value, the ground fault is generated in any of the plurality of propulsion coil groups Any of the plurality of propulsion coil groups when it is determined that the first current value exceeds the first reference value or any of the plurality of second current values exceeds the second reference value. It may have a step (b) of determining that a ground fault has occurred in the heel. Further, according to the ground fault position locating method, a first current value of the first connection line and the plurality of second connection lines exceeds a first reference value or a second current value exceeds a second reference value. When the first connection line or the second connection line which is one connection line or the second connection line and which is arranged on the side farthest from the ground point is a third connection line, the first connection line or the second connection line is in contact with the third connection line (C) Step of locating the ground fault position when the ground fault occurs by setting the position of the propulsion coil group disposed on the opposite side to the point side and adjacent to the third connection line to the ground fault position You may have.

  In another aspect, the track may include a plurality of structures arranged along the track, and the plurality of propulsion coil groups may be respectively provided to each of the plurality of structures.

  Also, in another aspect, the trajectory comprises a plurality of structure groups arranged along the trajectory, and each of the plurality of structure groups has a plurality of structures arranged along the trajectory, The plurality of propulsion coil groups may be provided to each of the plurality of structure groups.

  The ground fault positioning system according to one aspect of the present invention is a ground fault positioning system that locates a ground fault position when a ground fault occurs in a propulsion coil device provided on a track on which a linear synchronous motor type vehicle travels. is there. In the ground fault localization system, the propulsion coil device includes a plurality of propulsion coil groups arranged along a track, and each of the plurality of propulsion coil groups is a plurality of first propulsion coils arranged along the path And each of the plurality of first propulsion coils includes a first conductor, a first insulator covering the first conductor, and a first semiconductive layer covering the first insulator. The plurality of first conductors respectively included in each of the plurality of first propulsion coils are electrically connected to each other in series across the plurality of propulsion coil groups, and are respectively included in each of the plurality of first propulsion coils. The first semiconductive layer is electrically connected to each other for each propulsion coil group, and the plurality of first semiconductive layers electrically connected to each other for each propulsion coil group makes the semiconductive layer group for each propulsion coil group The formed semiconductive layer group is grounded via the first connection line for each propulsion coil group. Then, the ground fault localization system measures the potential of the semiconductive layer group or the current flowing through the first connection line for each propulsion coil group, and a ground fault has occurred based on the measured values. Determine the location of the ground fault.

  In another embodiment, the ground fault localization system may have a measurement unit that measures the potential of the semiconductive layer group or the current flowing through the first connection line for each propulsion coil group. In addition, the ground fault localization system compares the measured value measured by the measuring unit with a reference value, and when the measured value is less than or equal to the reference value, a ground fault occurs in the propulsion coil group in which the measured value is measured. It may be determined that the measurement value does not exceed the reference value, and the determination unit may determine that a ground fault has occurred in the propulsion coil group in which the measurement value is measured. In addition, the ground fault position determination system locates the ground fault position when the ground fault occurs by setting the position of the propulsion coil group determined to have the ground fault by the determination unit as the ground fault position. You may have a part.

  Moreover, as another aspect, any two semiconductive layer groups may not be electrically connected to each other.

  In another aspect, the propulsion coil device includes a ground line extending along the track and grounded, and the semiconductive layer group is grounded via the first connection line for each propulsion coil group. By being electrically connected to the wire, each propulsion coil group may be grounded via the first connection wire and the ground wire.

  Further, as another aspect, among the plurality of propulsion coil groups, the propulsion coil group disposed on the side closest to the power supply unit for supplying power to the propulsion coil device is used as a first end propulsion coil group, When the propulsion coil group disposed on the side farthest from the power supply unit among the propulsion coil groups is a second end propulsion coil group, the number of first propulsion coils included in the second end propulsion coil group is It may be larger than the number of first propulsion coils included in the one end propulsion coil group.

  In another aspect, each of the plurality of propulsion coil groups includes a plurality of first propulsion coils and a plurality of second propulsion coils alternately arranged along the track, and a plurality of second propulsion coils. Each may include a second conductor, a second insulator covering the second conductor, and a second semiconductive layer covering the second insulator. The plurality of second conductors respectively included in each of the plurality of second propulsion coils are electrically connected to each other in series across the plurality of propulsion coil groups, and are included in each of the plurality of first propulsion coils. The first semiconductive layer and the plurality of second semiconductive layers respectively included in each of the plurality of second propulsion coils are electrically connected to each other for each propulsion coil group, and are electrically connected to each other for each propulsion coil group The plurality of connected first semiconductive layers and the plurality of second semiconductive layers may form a semiconductive layer group for each propulsion coil group.

  The ground fault positioning system according to one aspect of the present invention is a ground fault positioning system that locates a ground fault position when a ground fault occurs in a propulsion coil device provided on a track on which a linear synchronous motor type vehicle travels. is there. In the ground fault localization system, the propulsion coil device includes a plurality of propulsion coil groups arranged along a track, and each of the plurality of propulsion coil groups is a plurality of first propulsion coils arranged along the path And each of the plurality of first propulsion coils includes a first conductor, a first insulator covering the first conductor, and a first semiconductive layer covering the first insulator. The plurality of first conductors respectively included in each of the plurality of first propulsion coils are electrically connected to each other in series across the plurality of propulsion coil groups, and are respectively included in each of the plurality of first propulsion coils. The first semiconductive layer is electrically connected to each other for each propulsion coil group, and the plurality of first semiconductive layers electrically connected to each other for each propulsion coil group makes the semiconductive layer group for each propulsion coil group It is formed. An end half which is a semiconductive layer group formed in an end propulsion coil group which is a propulsion coil group disposed at a first end of a first side in a first array formed by a plurality of propulsion coil groups The conductive layer group is grounded to the ground point via the first connection line, and the propulsion coil device further electrically connects between each of the plurality of semiconductive layer groups respectively formed on each of the plurality of propulsion coil groups. And a plurality of second connection lines connected in an orderly manner. Then, the ground fault localization system measures the current flowing through each of the first connection line and the plurality of second connection lines, and based on the measured values, the ground fault position when the ground fault occurs is determined. Standardize.

  In another aspect, the ground fault localization system measures the first current value flowing through the first connection line and the plurality of second current values respectively flowing through the plurality of second connection lines. You may have a part. Further, the ground fault localization system compares the first current value measured by the measuring unit with the first reference value, and compares each of the plurality of second current values measured by the measuring unit with the second reference value. When the first current value is less than or equal to the first reference value and any of the plurality of second current values is less than or equal to the second reference value, a ground fault occurs in any of the plurality of propulsion coil groups And it is determined that the first current value exceeds the first reference value, or when any of the plurality of second current values exceeds the second reference value, a ground fault occurs in any of the plurality of propulsion coil groups It may have a judgment part which judges with having occurred. In the ground fault localization system, the first current value exceeds the first reference value or the second current value exceeds the second reference value among the first connection line and the plurality of second connection lines. When the first connection line or the second connection line which is one connection line or the second connection line and which is arranged on the side farthest from the ground point is a third connection line, the first connection line or the second connection line is in contact with the third connection line By positioning the position of the propulsion coil group that is located on the opposite side to the point side and adjacent to the third connection line as a ground fault position, it has a positioning part that locates the ground fault position when a ground fault occurs. May be

  In another aspect, the track may include a plurality of structures arranged along the track, and the plurality of propulsion coil groups may be respectively provided to each of the plurality of structures.

  Also, in another aspect, the trajectory comprises a plurality of structure groups arranged along the trajectory, and each of the plurality of structure groups has a plurality of structures arranged along the trajectory, The plurality of propulsion coil groups may be provided to each of the plurality of structure groups.

  A ground fault positioning method for positioning a ground fault position when a ground fault occurs in a propulsion coil device provided on a track on which a linear synchronous motor type vehicle travels by applying an aspect of the present invention. It is possible to easily locate the ground fault position when the ground fault occurs while reducing the installation cost of the position locating device.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view schematically showing a track of a magnetic levitation railway to which a ground fault localization system according to a first embodiment is applied. FIG. 1 is a cross-sectional view schematically showing a track of a magnetic levitation railway to which a ground fault localization system according to a first embodiment is applied. It is a figure which shows typically the arrangement | sequence of the propulsion coil which the propulsion coil apparatus with which the ground fault positioning system of Embodiment 1 is applied has. It is sectional drawing of the propulsion coil which the propulsion coil apparatus with which the ground fault positioning system of Embodiment 1 is applied has. FIG. 1 is a block circuit diagram showing a feeding circuit for supplying power to a propulsion coil device to which a ground fault localization system according to Embodiment 1 is applied. FIG. 1 is a block circuit diagram showing a ground fault localization system of a first embodiment. FIG. 5 is a flow chart showing an example of a ground fault position determination method according to Embodiment 1. FIG. 7 is a block circuit diagram showing a ground fault position determination system of a first modified example of the first embodiment. It is a figure for demonstrating the method to measure the electric current which flows through three connection lines collectively. FIG. 7 is a block circuit diagram showing a ground fault positioning system according to a second modification of the first embodiment. FIG. 13 is a block circuit diagram showing a ground fault localization system according to a third modification of the first embodiment. FIG. 7 is a block circuit diagram showing a ground fault localization system according to a second embodiment. FIG. 16 is a block circuit diagram showing a ground fault position determination system of a first modified example of the second embodiment. FIG. 16 is a block circuit diagram showing a ground fault position determination system of a second modified example of the second embodiment. FIG. 17 is a block circuit diagram showing a ground fault position determination system of a third modified example of the second embodiment. FIG. 13 is a block circuit diagram showing a ground fault localization system according to a third embodiment. FIG. 14 is a flow chart showing an example of a ground fault localization method according to a third embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The disclosure is merely an example, and it is naturally included within the scope of the present invention as to what can be easily conceived of by those skilled in the art as to appropriate changes while maintaining the gist of the invention. In addition, the drawings may be schematically represented as to the width, thickness, shape, etc. of each part in comparison with the embodiment in order to clarify the description, but this is merely an example, and the interpretation of the present invention is not limited. It is not limited.

  In the specification and the drawings, elements similar to those described above with reference to the drawings in the drawings may be denoted by the same reference numerals, and detailed description may be omitted as appropriate.

  Furthermore, in the drawings used in the embodiments, hatching (hatching) added to distinguish structures may be omitted depending on the drawings.

  In addition, when showing a range as AB in the following embodiment, it shall show A or more and B or less except when clearly indicated.

Embodiment 1
<Tracks of Maglev Railroad>
First, the track of the magnetic levitation railway to which the ground fault localization system of the first embodiment is applied will be described. The railway to which the ground fault position determination system of the first embodiment is applied may be a railway on which a linear synchronous motor type vehicle travels on a track, and is not limited to the magnetic levitation type railway.

  FIG. 1 is a perspective view schematically showing a track of a magnetic levitation railway to which the ground fault localization system of the first embodiment is applied. FIG. 2 is a cross-sectional view schematically showing a track of a magnetic levitation railway to which the ground fault localization system of the first embodiment is applied.

  As shown in FIG. 1 and FIG. 2, the track 1 of the magnetic levitation railway to which the ground fault localization system according to the first embodiment is applied is a track on which the vehicle 2 of the maglev train travels. And two side walls 4 provided on the traveling path 3 at intervals in the width direction of the traveling path 3. The traveling path 3 may be divided into a plurality of traveling path portions 3a along the traveling direction of the vehicle 2, that is, the track 1, and the side wall 4 corresponds to the plurality of traveling path portions 3a along the track 1 It may be divided into a plurality of side wall portions 4a. And when structure 1a is formed by runway part 3a and side wall part 4a corresponding to runway part 3a, track 1 will be provided with a plurality of structures 1a arranged along track 1 .

  In the example shown in FIGS. 1 and 2, the track 1 having the travel path 3 and the two side walls 4 guides the vehicle 2 traveling in a state where the track 1 is magnetically levitated. The side wall 4b of the side wall 4 facing the vehicle 2 is provided with, for example, a guide 5 for supporting the auxiliary guide wheels of the vehicle 2, a floating guide coil 6, a propulsion coil 7 and the like. In the example shown in FIG. 2, the floating guide coil 6 is provided on the side surface 4 b of the side wall 4 via the propulsion coil 7. The superconducting magnet 2b, the refrigeration system 2c, and the like are accommodated in the side surface 2a of the vehicle 2 on the side facing the side wall 4.

  That is, the magnetically levitated railway shown in FIGS. 1 and 2 includes the superconducting magnet 2b provided on the vehicle 2, ie, on the vehicle, and the floating guide coil 6 and the propulsion coil 7 provided on the track 1, ie, on the ground. The magnetic levitation type railway which moves the vehicle 2 at high speed without contact with the track 1 by providing the vehicle 2 with a levitation force, a guidance force and a propulsive force by the electromagnetic interaction, that is, the electromagnetic force.

  In addition, as described with reference to FIG. 3 described later, a plurality of propulsion coils 7 form a propulsion coil device PD. Further, as described with reference to FIG. 6, a plurality of propulsion coils 7 form a propulsion coil group 8, and a plurality of propulsion coil groups 8 form a propulsion coil device PD. Further, a propulsion coil device PD as an armature coil device is formed by the propulsion coil 7 as an armature coil, and a field coil device is formed by the superconducting magnet 2b. In such a case, in the example shown in FIGS. 1 and 2, a propulsion coil device PD as an armature coil device provided along a track 1 on which the vehicle 2 travels, and a field coil device provided in the vehicle 2 Thus, a linear synchronous motor is formed.

<Propulsion coil device>
Next, a propulsion coil device to which the ground fault localization system of the first embodiment is applied will be described. FIG. 3: is a figure which shows typically the arrangement | sequence of the propulsion coil which the propulsion coil apparatus with which the ground fault localization system of Embodiment 1 is applied has.

  As shown in FIG. 3, a plurality of propulsion coils 7 form a propulsion coil device PD. In other words, the propulsion coil device PD has a plurality of propulsion coils 7.

  As shown in FIG. 3, the propulsion coils 7 of the U-phase, V-phase, and W-phase of three-phase alternating current are arranged along the orbit 1 in the plurality of propulsion coils 7 of the propulsion coil device PD. It arrange | positions in order of the phase, V phase, W phase, U phase, V phase, W phase ..., ie, the order of U phase, V phase, and W phase repeatedly. In FIG. 3, the U-phase propulsion coil 7 is indicated as a propulsion coil 7U, the V-phase propulsion coil 7 is indicated as a propulsion coil 7V, and the W-phase propulsion coil 7 is indicated as a propulsion coil 7W.

  In the example shown in FIG. 3, each of the plurality of propulsion coils 7 is provided at each end of the propulsion coil body 7a and the propulsion coil body 7a, and is connected to each of the two connection cables 7b. And two connection parts 7c. In addition, by connecting two connection parts 7c respectively provided in two propulsion coils 7 adjacent to each other for each phase by a connection cable part 7b, a plurality of propulsion coils 7 are sequentially connected for each phase, and thus power Connected to The voltage applied to the propulsion coil 7 is, for example, 6.6 to 33 kV. The feeding circuit including the power supply will be described with reference to FIG. 5 described later.

  As shown in FIG. 3, the propulsion coil 7 is fixed to the side wall 4 by sandwiching it with, for example, a mounting bracket or a floating guide coil. The propulsion coil 7 is a coil formed of a wound conductor. Although the number of turns, ie, the number of turns, of the propulsion coil 7 is simplified to two in FIG. 3, a coil having the number of turns as required can be formed. In addition, since the number of turns can be increased by winding the conductor, a high induced voltage can be obtained, and the efficiency of the linear motor (linear synchronous motor) can be improved.

  Hereinafter, as described with reference to FIG. 4, in the present specification, the propulsion coil device PD of the present embodiment is a propulsion coil device having a propulsion coil 7 formed by molding a wound conductor with resin. The case where it is applied is illustrated and demonstrated. However, the propulsion coil device PD of the present embodiment is also applicable to a propulsion coil device having a coil having a similar function as a propulsion coil and having a different structure.

  FIG. 4 is a cross-sectional view of a propulsion coil included in a propulsion coil device to which the ground fault localization system according to Embodiment 1 is applied. FIG. 4 (a) shows a cross section of the entire propulsion coil, and FIG. 4 (b) shows an enlarged view of a region RG1 surrounded by a two-dot chain line in FIG. 4 (a).

  As shown in FIG. 4 (a), the propulsion coil 7 is a coil 9d formed by the wound conductor 9a (see FIG. 4 (b)) and an insulation covering the coil 9d, ie, the conductor 9a. A body 9b and a semiconductive layer 9c covering the insulator 9b. That is, in the propulsion coil 7, the winding portion 9d formed of the wound conductor 9a is molded with, for example, a resin as the insulator 9b, and the outermost surface of the insulator 9b is semiconductive for electric field relaxation. The layer 9c is formed.

  As shown in FIG. 4B, the periphery of the conductor 9a is covered by the insulating layer 9e. Moreover, although illustration is abbreviate | omitted, the connection cable part 7b has a core wire as a conductor, the insulating layer which covers a core wire, and the sheath layer as a semiconductive layer which covers an insulating layer. The semiconductive layer 9c of the propulsion coil 7 is connected to the sheath layer of the connection cable portion 7b, and the potential of the semiconductive layer 9c of the propulsion coil 7 is equal to the potential of the sheath layer of the connection cable portion 7b.

  As described above, the propulsion coil 7 may be a coil having the same function as the propulsion coil and having another structure.

Further, in the present specification, having conductivity means that the conductivity is 10 ⁶ S / m or more, and having conductivity means that the conductivity exceeds 10 ^-6 S / m. And the case of less than 10 ⁶ S / m is meant, and having insulation means the case of electrical conductivity of 10 ⁻⁶ S / m or less.

  As the conductor 9a, for example, one made of a copper wire or an aluminum wire can be used. For example, an insulator made of an insulating material such as epoxy can be used as the insulator 9b. As a semiconductive layer 9c, it contains, for example, an insulating base resin having an ethylene-vinyl acetate copolymer (EVA) containing vinyl acetate (VA) and a propylene-olefin copolymer, and a base resin And what consists of a semiconductive resin composition which has carbon black which has electroconductivity can be used.

<Pip circuit device>
Next, a feeding circuit device for supplying power to the propelling coil device of the magnetic levitation railway to which the ground fault localization system of the first embodiment is applied will be described. FIG. 5 is a block circuit diagram showing a feeding circuit for supplying power to the propulsion coil device to which the ground fault localization system according to Embodiment 1 is applied.

  As shown in FIG. 5, the feeding circuit device 10 for supplying power to the propulsion coil device PD comprises three inverters to which three phase AC powers of U phase, V phase and W phase are respectively supplied. The electric cable 12, the plurality of propulsion coil devices PD, the plurality of feeding segment switches 13, and the control device 14 are provided. In FIG. 5, the feeding cable 12 to which U-phase AC power is supplied is indicated as feeding cable 12U, and the feeding cable 12 to which V-phase AC power is supplied is indicated as feeding cable 12V. The feeding cable 12 to which the AC power is supplied is indicated as the feeding cable 12W. Each of the three feeding cables 12U, 12V and 12W extends along the track 1 (see FIG. 1). Each of the three feeding cables 12U, 12V and 12W is connected to the output terminal of the inverter 11, and each of the three feeding cables 12U, 12V and 12W is an inverter via the feeding division switch 13. Each of the U-phase, V-phase, and W-phase three-phase AC power is supplied by the power supply circuit 11.

  A train operating section TS in which a vehicle 2 (see FIG. 1) traveling on a track 1 (see FIG. 1) is operated as a train is divided into a plurality of feeding sections PS each having a feeding section length. The propulsion coil device PD and the feeding division switch 13 are disposed for each feeding section PS. The feeding section length is usually longer than the train length, for example 500 m. In FIG. 5, three feeding sections PS1, PS2 and PS3 are shown as feeding sections PS, but in practice, the train operation section is divided into three or more multiple feeding sections. May be

  Each of the feeding sections PS1, PS2 and PS3 is provided with a propulsion coil device PD. In FIG. 5, three propulsion coil devices PD respectively provided in each of the feeding sections PS1, PS2 and PS3 are indicated as propulsion coil devices PD1, PD2 and PD3. Hereinafter, the feeding section PS1 will be described on behalf of the feeding sections PS1, PS2 and PS3, but each of the feeding sections PS2 and PS3 can be similar to the feeding section PS1.

  The propulsion coil device PD provided in the feeding section PS1 has three propulsion coil sections 15 to which three phase AC powers of U phase, V phase and W phase are respectively supplied. In FIG. 5, the propulsion coil unit 15 to which U-phase AC power is supplied is indicated as a propulsion coil unit 15U, and the propulsion coil unit 15 to which V-phase AC power is supplied is indicated as a propulsion coil unit 15V. The propulsion coil unit 15 to which the AC power is supplied is indicated as a propulsion coil unit 15W.

  The feeding classification switch 13 is provided for each feeding section PS, and for each feeding section PS, a state in which the propulsion coil device PD is not electrically connected to the electric cable 12 and the propulsion coil device PD. When the electric cable 12 is electrically connected, it switches. In other words, the feeding division switch 13 electrically connects the propulsion coil device PD and the feeding cable 12 so as to be able to open and close mutually.

  In FIG. 5, the feeding division switch 13 electrically connecting the propulsion coil device PD with the electric cable 12 so as to be able to open and close for the U phase is indicated as the feeding division switch 13U, and the propulsion coil device PD for the V phase A feeder segment switch 13 electrically connecting the cable 12 so as to be able to open and close is displayed as a feeder segment switch 13V, and for the W phase, it is electrically connected to the cable 12 so as to be able to open and close the propulsion coil device PD. The charge classification switch 13 is displayed as the charge classification switch 13W.

  One end of the propulsion coil unit 15U is connected to the power cable 12U via the feeding division switch 13U, one end of the propulsion coil unit 15V is connected to the feed cable 12V via the charging division switch 13V, and the propulsion coil One end of the portion 15W is connected to the wire cable 12W through the feeding division switch 13W. The other end of the propulsion coil unit 15U, the other end of the propulsion coil unit 15V, and the other end of the propulsion coil unit 15W may be electrically connected to each other as shown in FIG. A cable (N wire) of another neutral potential is provided, and it may be connected to it.

  As described above, each of the feeding sections PS2 and PS3 can be similar to the feeding section PS1. Then, the control device 14 controls the inverter 11 and the feeding classification switch 13 according to the program, thereby, for example, three for the propulsion coil device PD for each feeding section PS according to the operation status of the train. Control whether or not to supply phase alternating current power.

<Ground position positioning system and ground position positioning method>
Next, the ground fault positioning system and the ground fault positioning method of the first embodiment will be described. The ground fault position determination system according to the first embodiment is a ground fault position determination system for a magnetic levitation railway that locates a ground fault position when a ground fault occurs in a propulsion coil device of a magnetic levitation railway. The ground fault localization method according to the first embodiment is a ground fault localization method for a magnetic levitation railway that locates the ground fault position when a ground fault occurs in a propulsion coil device of a magnetic levitation railway.

  As described above, the railway to which the ground fault positioning system and the ground positioning method of the first embodiment are applied may be a railway on which a linear synchronous motor type vehicle travels on a track. In such a case, the ground fault position determination system of the first embodiment is a ground fault when a ground fault occurs in a propulsion coil device as an armature coil device provided on a track on which a linear synchronous motor type vehicle travels. It is a ground fault positioning system that positions the position. Further, according to the ground fault position locating method of the first embodiment, the ground fault position when a ground fault occurs in a propulsion coil device as an armature coil device provided on a track on which a linear synchronous motor type vehicle travels is located Ground positioning method.

  FIG. 6 is a block circuit diagram showing the ground fault localization system according to the first embodiment. FIG. 7 is a flow chart showing an example of the ground fault localization method according to the first embodiment.

  FIG. 6 shows the U-phase of the three propulsion coil units 15 that the propulsion coil device PD provided in the feeding section PS shown in FIG. 5 has and each of the three-phase AC power is supplied. The following shows the propulsion coil unit 15U to which alternating current power is supplied (the same applies to FIGS. 8, 10, 12 to 14 and 16). Further, in FIG. 6, for the sake of simplicity, the propulsion coil 7 is illustrated as having a short rectangular shape instead of the coil shape (the same applies to FIGS. 8 and 10 to 16). ). Although FIG. 6 shows the U phase among the three phases of the U phase, the V phase and the W phase, the same can be applied to the V phase and the W phase.

  As shown in FIG. 6, in one feeding section PS, a U-phase propulsion coil unit 15U of the propulsion coil device PD has a plurality of propulsion coils arranged along the track 1 (see FIG. 1) of a magnetic levitation railway. The group 8 is provided. Also, each of the plurality of propulsion coil groups 8 has a plurality of propulsion coils 7 arranged along the track 1 (see FIG. 1). Note that FIG. 6 shows the U-phase propulsion coil 7 U as the propulsion coil 7.

  Each of the plurality of propulsion coils 7 is formed of a wound conductor. As described with reference to FIG. 4, the propulsion coil 7 includes the conductor 9a, the insulator 9b covering the conductor 9a, and the semiconductive layer 9c covering the insulator 9b.

  The plurality of conductors 9 a included in each of the plurality of propulsion coils 7 are electrically connected to each other in series across the plurality of propulsion coil groups 8. As a result, the plurality of propulsion coils 7 can be electrically connected in series with one another across the plurality of propulsion coil groups 8, and the AC power supplied from the inverter 11 (see FIG. 5) A plurality of propulsion coils 7 can be supplied via a feeder (see FIG. 5) and a feeder segment switch 13 (see FIG. 5).

  The plurality of semiconductive layers 9 c included in each of the plurality of propulsion coils 7 are electrically connected to one another for each of the propulsion coil groups 8. The plurality of semiconductive layers 9 c electrically connected to each other for each propulsion coil group 8 form a semiconductive layer group 16 for each propulsion coil group 8. The semiconductive layer group 16 is grounded via the connection line 17 for each propulsion coil group 8. In other words, the plurality of semiconductive layers 9 c respectively included in each of the plurality of propulsion coils 7 may be formed if they are electrically connected to each other across the plurality of propulsion coils 7. The layer group is in a state of being divided for each propulsion coil group 8. That is, in order to identify the propulsion coil 7 which has a ground fault, the entire semiconductive layer group formed of the plurality of semiconductive layers 9c which may be electrically connected to each other in the entire propulsion coil group is The plurality of semiconductive layer groups 16 are divided and divided.

  Although not shown, the propulsion coil 7 is formed by a cable, and the cable has a core wire as the conductor 9a, an insulating layer covering the conductor 9a, and a semiconductive layer covering the insulating layer. In this case, the semiconductive layer group 16 may be formed by the semiconductive layer covering the insulating layer.

  In the example shown in FIG. 6, the U-phase propulsion coils 7U are divided into three groups in a feeding section PS, and the semiconductive layers 9c are commonly grounded in each group. Although only U-phase propulsion coil 7U is shown in FIG. 6, in actuality, as shown in FIG. 3, the propulsion coil device PD is not only U-phase propulsion coil 7U shown in FIG. It has the propulsion coil 7V of the phase and the propulsion coil 7W of the W phase.

  Further, the propulsion coil device PD includes a plurality of voltmeters 18 each of which measures the potential relative to the ground potential of each of the plurality of semiconductive layer groups 16. In such a case, the potential relative to the ground potential of the semiconductive layer group 16 is measured by the voltmeter 18 for each propulsion coil group 8, and a ground fault occurs when a ground fault occurs based on the measured value of the measured potential. It will determine the position.

  When the propulsion coil 7 is installed, for example, on the back side of the floating guide coil 6 (see FIG. 2), it is difficult to visually monitor whether the state of the propulsion coil 7 is sound or not. Further, even when an abnormality such as a ground fault occurs in the propulsion coil 7, a change in the appearance may not occur. That is, as described with reference to FIG. 2, even when the levitation guide coil 6 is provided on the side surface 4 b of the side wall 4 via the propulsion coil 7, when the propulsion coil 7 can not be observed directly by visual observation , It may be difficult to determine which propulsion coil 7 is grounded. In such a case, since it is not possible to specify the propulsion coil 7 in which the ground fault has occurred even if a ground fault occurs, it may take time to replace and restore the propulsion coil 7 in which the ground fault has occurred.

  Here, when power is supplied to the transmission line, when a ground fault occurs, a steep waveform that is generated as a waveform of the current flowing through the transmission line, that is, a surge waveform is measured at a plurality of positions, and the surge waveform is It is possible to use a method of locating the ground position based on the time required to propagate among a plurality of positions, that is, a method by a synchrophasor.

  However, when power is supplied to the propulsion coils 7 provided on the track 1 (see FIG. 1) of the magnetic levitation railway, it is difficult to use the same method. This is because the propulsion coil, which is the medium through which the surge waveform propagates, is not a uniform medium, and for example, there is a difference in the characteristic impedance between the propulsion coil body 7a (see FIG. 3) and the connecting cable 7b (see FIG. 3). It is due to being there. That is, every time the propagated surge waveform passes through the boundary between the propulsion coil main body 7a and the connecting cable 7b, transmission and reflection of the surge waveform occur, which attenuates the waveform and becomes complicated. It becomes difficult to measure surge waveforms with high accuracy.

  Here, a ground fault positioning method may be considered in which the potential of the semiconductive layer 9c included in the propulsion coil 7 is measured to determine the ground fault position. According to such a ground positioning method, it is not necessary to use the synchrophasor method, and there is no need to worry about whether or not a highly accurate surge waveform can be measured.

  A plurality of semiconductive layers 9 c respectively included in each of the plurality of propulsion coils 7 are electrically connected to one another across the plurality of propulsion coil groups 8 and are electrically connected to one another across the plurality of propulsion coil groups 8. A case is considered where a semiconductive layer group is formed by a plurality of semiconductive layers 9c, and the formed semiconductive layer group is grounded via one connection line. In such a case, as a ground fault positioning method, the potential with respect to the ground potential of the semiconductive layer group integrally formed over the plurality of propulsion coil groups 8 is measured. Even if a ground fault occurs at any position of the ground, a large current flows in the connecting line and the potential with respect to the ground potential of the semiconductive layer group rises, so based on the measured value of the measured potential, a plurality of propulsion coil groups The occurrence of a ground fault somewhere in 8 can be easily determined. However, it can not be determined where in the plurality of propulsion coil groups 8 a ground fault has occurred.

  Alternatively, it is assumed that the plurality of semiconductive layers 9 c included in each of the plurality of propulsion coils 7 are grounded via connection lines for each of the propulsion coils 7. In such a case, as a ground fault positioning method, the potential relative to the ground potential of the semiconductive layer 9c is to be measured for each propulsion coil 7, and the propulsion coil 7 is promoted regardless of the occurrence of a ground fault. When a large current flows in the connecting line connected to the semiconductive layer 9c of the coil 7 and the potential relative to the ground potential of the semiconductive layer 9c rises, when a ground fault occurs based on the measured value of the measured potential It is possible to determine the ground fault position of However, in such a case, in order to measure the potential of the semiconductive layer 9c with respect to the ground potential for each propulsion coil 7, it is necessary to provide voltmeters as many as the number of propulsion coils 7 and the installation cost of the ground positioning apparatus increases. And the measurement circuit for measuring the potential of the semiconductive layer 9c becomes complicated.

  In the ground fault positioning method described in Patent Document 1 described above, the distance from one end of the feeding section three-phase propulsion coil to the ground fault point is calculated by performing an operation using a resonant frequency measured for the current flowing through the propulsion coil. It is a method to determine Therefore, a ground fault positioning method is desired which can easily locate the ground fault position when the ground fault occurs while reducing the installation cost of the ground fault position measuring device.

  On the other hand, in the first embodiment, the plurality of semiconductive layers 9 c electrically connected to each other for each propulsion coil group 8 form the semiconductive layer group 16 for each propulsion coil group 8. Is grounded via the connecting wire 17 for each propulsion coil group 8. In such a case, as a ground fault positioning method, the potential relative to the ground potential of the semiconductive layer group 16 is measured for each propulsion coil group 8, but a ground fault occurs in any of the propulsion coil groups 8 Then, in the propulsion coil group 8, a large current flows from the conductor 9a to the connection line 17 through the semiconductive layer group 16, and the potential relative to the ground potential of the semiconductive layer group 16 rises, so measurement of the measured potential Based on the value, it can be easily determined in which propulsion coil group 8 a ground fault has occurred, and the ground fault position when the ground fault has occurred can be easily determined.

  Further, in the first embodiment, since the potential of the semiconductive layer group 16 may be measured for each propulsion coil group 8, it is not necessary to install voltmeters as many as the number of propulsion coils 7. Therefore, the number of voltmeters provided in the propulsion coil device PD can be reduced, the installation cost of the ground positioning device can be reduced, and the measuring circuit for measuring the potential of the semiconductive layer group 16 can be simplified. Can be

  That is, according to the ground fault positioning system and the ground fault positioning method of the first embodiment, the potential relative to the ground potential of the semiconductive layer group 16 is measured for each propulsion coil group 8, and the measured potential is measured. Based on the value, locate the ground fault position when the ground fault occurs. Therefore, it is possible to easily locate the ground fault position when the ground fault occurs while reducing the installation cost of the ground fault position determination device. When a ground fault occurs, track maintenance such as replacement of the propulsion coil 7 can be performed easily and reliably at the ground fault position that is easily specified. Alternatively, when the ground fault occurs, the ground fault position can be located instantaneously, and maintenance work of the track 1 such as replacement of the propulsion coil 7 at the ground fault position can be started immediately after the train operation is finished.

  Specifically, the propulsion coil group 8 can include, for example, three to five propulsion coils 7. In such a case, the number of voltmeters to be installed can be reduced to 1⁄5 to 1⁄3 as compared with the case where voltmeters are installed for each propulsion coil 7.

  Furthermore, the ground fault positioning system and the ground fault positioning method according to the first embodiment are described in the above-mentioned Patent Document 1, and the amount of change in the resonance frequency of the current waveform when the ground fault occurs is converted to the converter side. It may be used in combination with the method of determining the ground fault position by measuring Thereby, the positioning accuracy of the ground fault position when the ground fault occurs can be further improved.

  As shown in FIG. 6, preferably, the ground fault location system 20 according to the first embodiment includes a measuring unit 21, a determining unit 22, and a locating unit 23. The measuring unit 21 measures the potential relative to the ground potential of the semiconductive layer group 16 for each propulsion coil group 8. The determination unit 22 compares the measured value measured by the measurement unit 21 with the reference value, and when the measured value is equal to or less than the reference value, no ground fault occurs in the propulsion coil group 8 in which the measured value is measured. When the measured value exceeds the reference value, it is determined that a ground fault has occurred in the propulsion coil group 8 in which the measured value is measured. The positioning unit 23 locates the ground fault position when the ground fault occurs by setting the position of the propulsion coil group 8 determined by the determination unit 22 to cause the ground fault as the ground fault position. Thereby, a concrete ground fault positioning operation can be realized.

  As shown in FIG. 7, preferably, the ground fault location method according to the first embodiment includes a measurement step (step S1), a determination step (step S2), and a positioning step (step S3). . In step S1, the potential with respect to the ground potential of the semiconductive layer group 16 (see FIG. 6) is measured for each propulsion coil group 8 (see FIG. 6). In step S2, the measured value measured in step S1 is compared with a reference value, and when the measured value is less than or equal to the reference value, it is determined that a ground fault has not occurred in the propulsion coil group 8 in which the measured value is measured. When the measured value exceeds the reference value, it is determined that a ground fault has occurred in the propulsion coil group 8 in which the measured value is measured. In step S3, by setting the position of the propulsion coil group 8 determined to have a ground fault as the ground fault position, the ground fault position when the ground fault occurs is located. Thereby, a concrete ground fault positioning operation can be realized.

  In FIG. 7, in consideration of the first modification of the first embodiment described later, in step S1, “a potential of the semiconductive layer group or a current flowing through the connecting line is measured for each propulsion coil group” Described.

  As shown in FIG. 6, preferably, any two semiconductive layer groups 16 are not electrically connected to each other. As a result, the potential with respect to the ground potential of the semiconductive layer group 16 can be reliably measured for each propulsion coil group 8, and the ground fault position when a ground fault occurs is reliably determined in units of propulsion coil group 8 can do.

  Further, as shown in FIGS. 1 and 6, preferably, the track 1 includes a plurality of structures (guide ways) 1a arranged along the track 1, and a plurality of propulsion coil groups 8 includes a plurality of structures. Each of the structures 1a is provided (hereinafter, the same applies to the first to third modifications of the first embodiment). As a result, specifying the ground fault position for each propulsion coil group 8 is equivalent to specifying the ground fault position for each structure 1a, so the ground fault position can be more easily located, and 1 maintenance management can be performed easily and reliably.

  Specifically, for example, the length of the structure (guide way) 1a is about 10 m, and one propulsion coil group 8 having a length of about 10 m is provided corresponding to the one structure 1a. The semiconductive layer group 16 is grounded by the connection wire 17 for each propulsion coil group 8 at an interval of about 10 m corresponding to the length of the structure 1a. In such a case, since the potential of the semiconductive layer group 16 is measured for each propulsion coil group 8, it is position accuracy at the time of locating the ground fault position when the ground fault occurs in the propulsion coil device PD. As positioning accuracy, positioning accuracy of about 10 m can be obtained. That is, when a ground fault occurs, it can be determined in which structure 1a the ground fault has occurred.

  Alternatively, preferably, the track 1 comprises a plurality of structure groups arranged along the track 1 and each of the plurality of structure groups has a plurality of structures 1 a arranged along the track 1 The plurality of propulsion coil groups 8 may be provided to each of the plurality of structure groups (hereinafter, the same applies to the first to third modifications of the first embodiment). In such a case, locating the ground fault position for each propulsion coil group 8 is equivalent to locating the ground fault position for each structure group, so it is possible to more easily locate the ground fault position. , Maintenance management of the track 1 can be performed easily and reliably.

  Specifically, how many parts of the propelling coil group are divided into propelling coil groups can be determined based on the balance between the positioning accuracy when determining the ground fault position and the installation cost of the voltmeter.

  The ground fault positioning system or the ground fault positioning method according to the first embodiment can be applied to all of the propulsion coil device PD, that is, all of the portions of the track 1 (see FIG. 1) where the propulsion coil 7 is installed. There is no need to install or implement. Therefore, in the ground fault positioning system and the ground fault positioning method according to the first embodiment, the voltage applied to the propulsion coil 7 which is considered to be relatively easy to cause a ground fault in the feeding section PS is relatively large. The installation or implementation may be limited to the high section. Alternatively, the ground fault positioning system and the ground fault positioning method according to the first embodiment may be installed in the feeding section PS having a relatively high voltage applied to the propulsion coil 7 among the plurality of feeding sections PS. You may implement.

First Modified Example of First Embodiment
Next, a ground fault position determination system and a ground fault position determination method according to a first modification of the first embodiment will be described. FIG. 8 is a block circuit diagram showing a ground fault localization system according to a first modification of the first embodiment.

  As to the ground fault positioning system and the ground fault positioning method of the first modification, instead of measuring the potential of the semiconductive layer group with respect to the ground potential for each propulsion coil group, the current flowing through the connecting line is The ground fault positioning system and the ground fault positioning method according to the first embodiment can be the same except that the measurement is performed for each propulsion coil group.

  As shown in FIG. 8, in the first modification as well, as in the first embodiment (see FIG. 6), the propulsion coils are formed by the plurality of semiconductive layers 9c electrically connected to each other for each propulsion coil group 8. A semiconductive layer group 16 is formed for each group 8, and the semiconductive layer group 16 is grounded via the connection line 17 for each propulsion coil group 8. On the other hand, in the first modification, unlike the first embodiment, the propulsion coil device PD includes a plurality of ammeters 25 each of which measures the current flowing through each of the plurality of connection lines 17. In such a case, the current flowing through the connecting wire 17 is measured by the ammeter 25 for each propulsion coil group 8, and the ground fault position when the ground fault occurs is determined based on the measured value of the measured current. It will be.

  When measuring the current flowing through the connecting wire 17, the current flowing through the connecting wire 17 may be measured for only one of the U-phase, V-phase, and W-phase propulsion coil groups 8, but the same location, for example The currents flowing through the three connecting wires 17 for grounding each of the U-phase, V-phase and W-phase three-phase propulsion coil groups 8 provided in the same structure 1a (see FIG. 1) are collectively determined. It may be measured. A method of collectively measuring the current flowing through such three connection lines 17 will be described with reference to FIG. In FIG. 9, three connection lines 17 for grounding the U-phase, V-phase and W-phase three-phase propulsion coil groups 8 are shown as connection lines 17U, 17V and 17W, respectively.

  As shown in FIG. 9, for example, a clamp meter 25a as the ammeter 25 can be used to measure the currents flowing through the three connection lines 17U, 17V and 17W in a three-phase operation. At this time, the three connection lines 17U, 17V and 17W are collectively clamped by the clamp unit 25b of the clamp meter 25a by collectively clamping the three connection lines 17U, 17V and 17W of U phase, V phase and W phase. The current flowing through can be measured in three phases collectively (the same applies to the first modification and the third embodiment of the second embodiment described with reference to FIGS. 13 and 16).

  A plurality of semiconductive layers 9 c respectively included in each of the plurality of propulsion coils 7 are electrically connected to one another across the plurality of propulsion coil groups 8 and are electrically connected to one another across the plurality of propulsion coil groups 8. A case is considered where a semiconductive layer group is formed by a plurality of semiconductive layers 9c, and the formed semiconductive layer group is grounded via one connection line. In such a case, although the current flowing through the one connecting wire is measured as a method of locating the ground fault position, the connecting wire may be used regardless of where in the plurality of propulsion coil groups 8 a ground fault occurs. Since a large current flows in the sensor, it can be easily determined that a ground fault has occurred somewhere in the plurality of propulsion coil groups 8 based on the measured value of the measured current. However, it can not be determined where in the plurality of propulsion coil groups 8 a ground fault has occurred.

  Alternatively, it is assumed that the plurality of semiconductive layers 9 c included in each of the plurality of propulsion coils 7 are grounded via connection lines for each of the propulsion coils 7. In such a case, the current flowing through the connecting wire is measured for each propulsion coil 7 as a method for positioning the ground fault position. Since a large current flows in the connecting line connected to the semiconductive layer 9c, the ground fault position when the ground fault occurs can be determined based on the measured value of the measured current. However, in such a case, in order to measure the current flowing through the connecting wire for each propulsion coil 7, it is necessary to provide an ammeter as many as the number of propulsion coils 7, and the installation cost of the ground positioning apparatus increases. The measurement circuit for measuring the current flowing through the connecting line becomes complicated.

  On the other hand, in the first modification, unlike the first embodiment, the propulsion coil device PD includes a plurality of ammeters 25 each of which measures the current flowing through each of the plurality of connection lines 17. Similarly to 1, the plurality of semiconductive layers 9c electrically connected to each other for each propulsion coil group 8 form a semiconductive layer group 16 for each propulsion coil group 8, and the semiconductive layer group 16 is a propulsion coil Each group 8 is grounded via the connecting line 17. In such a case, the current flowing through the connecting wire 17 is measured for each propulsion coil group 8 as a ground fault positioning method, but when a ground fault occurs in any of the propulsion coil groups 8, the propulsion is performed In the coil group 8, a large current flows in the connecting wire 17. Therefore, it can be easily determined in which propulsion coil group 8 a ground fault has occurred based on the measurement value of the current measured by the ammeter 25. The ground fault position when the ground fault occurs can be easily determined.

  Further, in the first modified example, since it is sufficient to measure the current flowing through the connection wire 17 for each propulsion coil group 8, it is not necessary to install as many ammeters as there are propulsion coils 7. Therefore, the number of ammeters provided in the propulsion coil device PD can be reduced, the installation cost of the ground positioning device can be reduced, and the measurement circuit for measuring the current flowing through the connecting wire 17 can be simplified. can do.

  That is, according to the ground fault positioning system and the ground fault positioning method of the first modification, the current flowing through the connecting wire 17 is measured for each propulsion coil group 8, and the measured value of the measured current is used. , Locate the ground fault position when the ground fault occurs. Therefore, it is possible to easily locate the ground fault position when the ground fault occurs while reducing the installation cost of the ground fault position determination device.

  Specifically, as described above in the first embodiment, the propulsion coil group 8 can include, for example, 3 to 5 propulsion coils. In such a case, the number of ammeters to be installed can be reduced to 1⁄5 to 1⁄3 as compared with the case where ammeters are installed for each propulsion coil 7.

  As shown in FIG. 8, the ground fault localization system 20 of the first modification is similar to the ground fault localization system 20 (see FIG. 6) of the first embodiment, in the measurement unit 21 and the determination unit. 22 and a positioning unit 23. In the ground fault localization system 20 according to the first modification, the measuring unit 21 measures the current flowing through the connecting wire 17 for each propulsion coil group 8 instead of the potential to the ground potential of the semiconductive layer group 16. It can be made to be the same as the ground fault positioning system 20 (refer to FIG. 6) of the first embodiment except for the following points.

  Further, in the ground fault positioning method of the first modification, in step S1, instead of the potential to the ground potential of the semiconductive layer group 16 (see FIG. 8), the current flowing through the connecting line 17 (see FIG. 8) Except for the point of measurement for each of the propulsion coil groups 8 (see FIG. 8), the method can be the same as the ground fault positioning method (see FIG. 7) of the first embodiment.

  Specifically, how many parts of the propelling coil group are divided into propelling coil groups can be determined based on the balance between the positioning accuracy in locating the ground fault position and the installation cost of the ammeter. In addition, the first modification may be used in combination with the first embodiment, and the ground fault position may be determined using both the voltmeter and the ammeter (first modification of the second embodiment and the second embodiment) The same applies between

Second Modified Example of First Embodiment
Next, a ground fault position determination system and a ground fault position determination method according to a second modification of the first embodiment will be described. FIG. 10 is a block circuit diagram showing a ground fault localization system according to a second modification of the first embodiment.

  With regard to the ground fault positioning system and the ground fault positioning method of the second modification, the number of propulsion coils included in the propulsion coil group on the opposite side (downstream side) of the inverter side is the propulsion coil on the inverter side (upstream side) The ground fault positioning system and the ground fault positioning method according to the first embodiment can be the same as that of the first embodiment except that the number is larger than the number of propulsion coils included in the group.

  As shown in FIG. 10, in the second modification as well, as in the first embodiment (see FIG. 6), the propulsion coils are formed by the plurality of semiconductive layers 9c electrically connected to each other for each propulsion coil group 8. A semiconductive layer group 16 is formed for each group 8, and the semiconductive layer group 16 is grounded via the connection line 17 for each propulsion coil group 8. Further, the propulsion coil device PD includes a plurality of voltmeters 18 each of which measures the potential relative to the ground potential of each of the plurality of semiconductive layer groups 16. In such a case, the potential relative to the ground potential of the semiconductive layer group 16 is measured by the voltmeter 18 for each propulsion coil group 8, and a ground fault occurs when a ground fault occurs based on the measured value of the measured potential. It will determine the position.

  On the other hand, in the second modification, unlike the first embodiment, the number of propulsion coils 7 included in the propulsion coil group 8 on the side (downstream side) far from the inverter 11 rather than the side (upstream side) closer to the inverter 11 Is large.

  Among the plurality of propulsion coil groups 8, the propulsion coil group 8 disposed on the side closest to the inverter 11, which is a power supply unit for supplying electric power to the propulsion coil device PD, is an end portion propulsion coil group 81, and a plurality of propulsion coils Of the group 8, the propulsion coil group 8 disposed on the side farthest from the inverter 11 is referred to as an end portion propulsion coil group 82. In this case, the number of propulsion coils 7 (6 in FIG. 10) of the end propulsion coil group 82 is greater than the number of propulsion coils 7 (4 in FIG. 10) of the end propulsion coil group 81. large.

  At the side far from the inverter 11 (downstream side), the voltage applied to the propulsion coil 7 drops compared to the side closer to the inverter 11 (upstream side), so that a ground fault is less likely to occur. Therefore, by making the number of propulsion coils 7 in the end propulsion coil group 82 larger than the number of propulsion coils 7 in the end propulsion coil group 81, the propulsion coil groups on the side (downstream side) far from the inverter 11 It is possible to make the number of propulsion coils 7 included in 8 larger than the number of propulsion coils 7 in the propulsion coil group 8 on the side (upstream side) closer to the inverter 11. Further, the number of voltmeters provided in the propulsion coil device PD can be reduced, the installation cost of the ground positioning device can be reduced, and the measuring circuit for measuring the potential of the semiconductive layer group 16 can be simplified. Can be

  On the other hand, make the number of propulsion coils 7 of the propulsion coil group 8 on the inverter 11 side (upstream side) smaller than the number of propulsion coils 7 of the propulsion coil group 8 on the opposite side (downstream side) to the inverter 11 side. Therefore, on the inverter 11 side (upstream side), it is possible to maintain the position accuracy of positioning the ground fault position when the ground fault occurs.

  Since the voltage applied to the propulsion coil 7 gradually decreases from the end propulsion coil group 81 to the end propulsion coil group 82, the number of the propulsion coils 7 of the propulsion coil group 8 is gradually increased. It is more preferable to

  Further, in the second modification, in the case of the first embodiment in which the potential with respect to the ground potential of the semiconductive layer group 16 is measured for each propulsion coil group 8, the number of propulsion coils 7 included in the end propulsion coil group 82 An example in which the number of the propelling coils 7 included in the end propelling coil group 81 is larger than that of the propelling coil group 81 has been described. However, in the case of the first modification of the first embodiment in which the current flowing through the connecting wire 17 is measured for each propulsion coil group 8, the number of the propulsion coils 7 included in the end propulsion coil group 82 is It may be larger than the number of propulsion coils 7 that the group 81 has.

Third Modified Example of First Embodiment
Next, a ground fault position determination system and a ground fault position determination method according to a third modification of the first embodiment will be described. FIG. 11 is a block circuit diagram showing a ground fault localization system according to a third modification of the first embodiment.

  In the ground fault positioning system and the ground fault positioning method of the third modification, a plurality of semiconductive layers are electrically connected across three propulsion coil units to which three-phase AC power is supplied, respectively. The ground fault positioning system and the ground fault positioning method according to the first embodiment can be the same except that the semiconductive layer group is formed.

  FIG. 11 shows three of the propulsion coil devices PD provided in the feeding section PS shown in FIG. 5 and to which three U-phase, V-phase and W-phase three-phase AC powers are respectively supplied. The propulsion coil units 15U, 15V and 15W are shown (the same applies to FIG. 15).

  As shown in FIG. 11, in one feeding section PS, the propulsion coil device PD includes a plurality of propulsion coil groups 8 arranged along the track 1 (see FIG. 1). In addition, each of the plurality of propulsion coil groups 8 includes a plurality of propulsion coils 7 arranged along the track 1. In the example shown in FIG. 11, each of the plurality of propulsion coil groups 8 is arranged along the track 1 by being repeated in the order of the U-phase propulsion coil 7U, the V-phase propulsion coil 7V, and the W-phase propulsion coil 7W. A plurality of propulsion coils 7U, a plurality of propulsion coils 7V, and a plurality of propulsion coils 7W are provided.

  The plurality of conductors 9a respectively included in the plurality of propulsion coils 7U are electrically connected to one another across the plurality of propulsion coil groups 8 in series. Thereby, the plurality of propulsion coils 7U can be electrically connected in series with each other across the plurality of propulsion coil groups 8, and AC power supplied from the inverter 11 (see FIG. 5) In each case, a plurality of propulsion coils 7U can be supplied via the feeding cable 12U (see FIG. 5) and the feeding segment switch 13U (see FIG. 5).

  The plurality of conductors 9 a included in each of the plurality of propulsion coils 7 </ b> V are electrically connected to each other in series across the plurality of propulsion coil groups 8. As a result, the plurality of propulsion coils 7V can be electrically connected in series with each other across the plurality of propulsion coil groups 8, and the AC power supplied from the inverter 11 (see FIG. 5) In each case, a plurality of propulsion coils 7V can be supplied via the feeding cable 12V (see FIG. 5) and the feeding segment switch 13V (see FIG. 5).

  The plurality of conductors 9 a included in each of the plurality of propulsion coils 7 W are electrically connected in series with one another across the plurality of propulsion coil groups 8. As a result, the plurality of propulsion coils 7W can be electrically connected in series with one another across the plurality of propulsion coil groups 8, and the AC power supplied from the inverter 11 (see FIG. 5) In each case, a plurality of propulsion coils 7W can be supplied via the feeding cable 12W (see FIG. 5) and the feeding segment switch 13W (see FIG. 5).

  On the other hand, in the propulsion coil group 8 formed by the plurality of propulsion coils 7U, the plurality of propulsion coils 7V, and the plurality of propulsion coils 7W, the plurality of semiconductive layers 9c respectively included in each of the plurality of propulsion coils 7 are The propulsion coil groups 8 are electrically connected to one another. In the propulsion coil group 8 formed of the plurality of propulsion coils 7U, the plurality of propulsion coils 7V, and the plurality of propulsion coils 7W, the plurality of semiconductive layers 9c electrically connected to each other for each propulsion coil group 8 A semiconductive layer group 16 is formed for each propulsion coil group 8. The semiconductive layer group 16 is grounded via the connection line 17 for each propulsion coil group 8. In other words, the plurality of semiconductive layers 9 c respectively included in each of the plurality of propulsion coils 7 may be formed if they are electrically connected to each other across the plurality of propulsion coils 7. The layer group is in a state of being divided for each propulsion coil group 8. In the example shown in FIG. 11, the plurality of semiconductive layers 9c are repeatedly connected in order of the semiconductive layer 9c of the propulsion coil 7U, the semiconductive layer 9c of the propulsion coil 7V, and the semiconductive layers 9c of the propulsion coil 7W. However, the order of connection is not particularly limited as long as it is connected for each propulsion coil group 8. The connection of the semiconductor layer 9c of each phase to the connection line 17 may be either series connection or parallel connection.

  Further, the propulsion coil device PD includes a plurality of voltmeters 18 each of which measures the potential relative to the ground potential of each of the plurality of semiconductive layer groups 16. In such a case, the potential relative to the ground potential of the semiconductive layer group 16 is measured by the voltmeter 18 for each propulsion coil group 8, and a ground fault occurs when a ground fault occurs based on the measured value of the measured potential. It will determine the position.

  Also in the third modification, as in the first embodiment, it suffices to measure the potential of the semiconductive layer group 16 for each propulsion coil group 8, so it is not necessary to install voltmeters as many as the number of propulsion coils 7. . Therefore, the number of voltmeters provided in the propulsion coil device PD can be reduced, the installation cost of the ground positioning device can be reduced, and the measuring circuit for measuring the potential of the semiconductive layer group 16 can be simplified. Can be

  On the other hand, in the third modification, unlike the first embodiment, the propulsion coil group 8 includes a plurality of U-phase propulsion coils 7U, a plurality of V-phase propulsion coils 7V, and a plurality of W-phase propulsion coils 7W. As compared with the first embodiment, the number of voltmeters 18 provided in the propulsion coil device PD can be reduced to one third. Therefore, in the third modification, the installation cost of the ground positioning apparatus can be further reduced compared to the first embodiment, and the measurement circuit for measuring the potential of the semiconductive layer group 16 can be further simplified. can do.

  Unlike the first embodiment, in the third modification, only by measuring the potential relative to the ground potential of the semiconductive layer group 16, any phase of U phase, V phase and W phase when a ground fault occurs It is difficult to determine if a ground fault has occurred in the U-phase, but in which phase of the U-phase, V-phase and W-phase the earth fault has occurred, for example, the current flowing through a substation or feeder cable Since it can be easily identified by measuring the current flowing at a fixed position or the potential at a fixed position on the inverter 11 side (upstream side) of the propulsion coil device PD, the ground when a ground fault occurs The position accuracy similar to that of the first embodiment can be maintained as the position accuracy for positioning the winding position.

  In the third modification, an example has been described in which the plurality of semiconductive layers 9c are electrically connected to form the semiconductive layer group 16 over three phases. However, the plurality of semiconductive layers 9 c may be electrically connected to form the semiconductive layer group 16 over at least two of the three phases. In such a case, each of the plurality of propulsion coil groups 8 has a plurality of propulsion coils 7U and a plurality of propulsion coils 7V alternately arranged along the track 1 (see FIG. 1). The plurality of semiconductive layers 9c respectively included in each of the plurality of propulsion coils 7U and the plurality of semiconductive layers 9c respectively included in each of the plurality of propulsion coils 7V are electrically connected to each other for each propulsion coil group 8 Will be connected to

Second Embodiment
Next, the ground fault positioning system and the ground fault positioning method according to the second embodiment will be described. FIG. 12 is a block circuit diagram showing a ground fault localization system according to a second embodiment.

  In the ground fault positioning system and the ground fault positioning method according to the second embodiment, the propulsion coil device includes a grounding wire which extends along a track and is grounded, and the semiconductive layer group is a propulsion coil. It differs from the ground fault positioning system and the ground fault positioning method of the first embodiment in that each group is electrically connected to the ground line via a connection line. On the other hand, the other points are the same as those of the ground fault position locating system and the ground fault position locating method of the first embodiment, and thus the detailed description will be omitted.

  As shown in FIG. 12, in the second embodiment, as in the first embodiment (see FIG. 6), for example, the U-phase propulsion coil unit 15U of the propulsion coil device PD in the feeding section PS has A plurality of propulsion coil groups 8 are arranged along the track 1 (see FIG. 1) of the floating railway. Further, each of the plurality of propulsion coil groups 8 has a plurality of propulsion coils 7 U arranged along the track 1.

  In the second embodiment, as in the first embodiment, each of the plurality of propulsion coils 7U covers the conductor 9a, the insulator 9b covering the conductor 9a (see FIG. 4A), and the insulator 9b. And a semiconductive layer 9c.

  Also in the second embodiment, as in the first embodiment, the plurality of conductors 9a included in each of the plurality of propulsion coils 7 are electrically connected to each other in series across the plurality of propulsion coil groups 8 There is. As a result, the plurality of propulsion coils 7 can be electrically connected in series with one another across the plurality of propulsion coil groups 8, and the AC power supplied from the inverter 11 (see FIG. 5) A plurality of propulsion coils 7 can be supplied via a feeder (see FIG. 5) and a feeder segment switch 13 (see FIG. 5).

  Also in the second embodiment, as in the first embodiment, the plurality of semiconductive layers 9c included in each of the plurality of propulsion coils 7 are electrically connected to one another for each of the propulsion coil groups 8, A semiconductive layer group 16 is formed for each propulsion coil group 8 by a plurality of semiconductive layers 9 c electrically connected to one another every eight.

  On the other hand, in the second embodiment, unlike the first embodiment, the propulsion coil device PD includes the ground line 26 which extends along the track 1 (see FIG. 1) and is grounded. The semiconductive layer group 16 is electrically connected to the ground line 26 via the connection line 17 for each propulsion coil group 8, whereby the semiconductive layer group 16 is connected via the connection line 17 and the ground line 26 for each propulsion coil group 8. It is grounded.

  In addition, although the propulsion coil device PD includes a plurality of voltmeters 18 each of which measures the potential of each of the plurality of semiconductive layer groups 16 to the ground line 26, the ground line 26 is grounded. The potential of 26 is equal to the ground potential. Therefore, in the second embodiment, as in the first embodiment, the propulsion coil device PD is provided with a plurality of voltmeters 18 each of which measures the potential of the plurality of semiconductive layer groups 16 with respect to the ground potential. Also in the second embodiment, as in the first embodiment, the potential with respect to the ground potential of the semiconductive layer group 16 is measured by the voltmeter 18 for each propulsion coil group 8, and the measured value of the measured potential is obtained. Based on this, the ground fault position when the ground fault occurs will be determined. Therefore, in the second embodiment, as in the first embodiment, it is possible to easily locate the ground fault position when the ground fault occurs while reducing the installation cost of the ground fault position determination device. In addition, when a ground fault occurs, track maintenance such as replacement of the propulsion coil 7 can be easily and reliably performed at the ground fault position that is easily specified.

  For example, in the case where it is determined that the ground wire 26 is provided further along the plurality of propulsion coils 7 provided along the track 1 (see FIG. 1) for the purpose other than the purpose of locating the ground position. The ground line 26 can be used for the purpose of locating the ground position, and the length of the connection line 17 provided for each semiconductive layer group 16 can be shortened. As described above, in the case of using the ground line 26 provided for another purpose, in the second embodiment, the installation cost of the ground positioning device can be further reduced compared to the first embodiment.

  As shown in FIG. 12, the ground fault position locating system 20 according to the second embodiment includes a measuring unit 21, a determining unit 22, and a locating unit 23. Further, measuring the potential of the semiconductive layer group 16 to the ground line 26 is equivalent to measuring the potential of the semiconductive layer group 16 with respect to the ground potential. Therefore, the ground fault localization system of the second embodiment 20 can be made the same as the ground fault localization system 20 (see FIG. 6) of the first embodiment. Further, in the ground fault positioning method of the second embodiment, measuring the potential of the semiconductive layer group 16 to the ground line 26 is synonymous with measuring the potential of the semiconductive layer group 16 to the ground potential. Therefore, it can be made to be the same as the ground fault positioning method (refer to FIG. 7) of the first embodiment.

  Also, as shown in FIG. 12, preferably, the track 1 (see FIG. 1) includes a plurality of structures 1a arranged along the track 1, and a plurality of propulsion coil groups 8 includes a plurality of structures It is provided in each of 1 a (hereinafter, the same applies to the first to third modifications of the second embodiment). As a result, specifying the ground fault position for each propulsion coil group 8 is equivalent to specifying the ground fault position for each structure 1a, so the ground fault position can be more easily located, and 1 maintenance management can be performed easily and reliably.

  Alternatively, preferably, the track 1 comprises a plurality of structure groups arranged along the track 1 and each of the plurality of structure groups has a plurality of structures 1 a arranged along the track 1 The plurality of propulsion coil groups 8 may be provided to each of the plurality of structure groups (hereinafter, the same applies to the first to third modifications of the second embodiment). In such a case, locating the ground fault position for each propulsion coil group 8 is equivalent to locating the ground fault position for each structure group, so it is possible to more easily locate the ground fault position. , Maintenance management of the track 1 can be performed easily and reliably.

  In the first embodiment, it is necessary to carry out grounding which is quite laborious for each propulsion coil group 8, and a large number of groundings are required. On the other hand, in the second embodiment, it is not necessary to ground for each propulsion coil group 8 which requires much time and effort, and it is possible to complete one for the plurality of propulsion coil groups 8. Therefore, the installation cost of the ground positioning device can be further reduced.

First Modified Example of Second Embodiment
Next, a ground fault position determination system and a ground fault position determination method according to a first modification of the second embodiment will be described. FIG. 13 is a block circuit diagram showing a ground fault localization system according to a first modification of the second embodiment.

  As to the ground fault positioning system and the ground fault positioning method of the first modification, instead of measuring the potential of the semiconductive layer group with respect to the ground potential for each propulsion coil group, the current flowing through the connecting line is The ground fault positioning system and the ground fault positioning method according to the second embodiment can be the same except that the measurement is performed for each propulsion coil group.

  As shown in FIG. 13, in the first modification, different from the second embodiment (see FIG. 12), the propulsion coil device PD measures a plurality of ammeters each measuring the current flowing through each of the plurality of connecting wires 17. Although, as described above, the potential of the ground line 26 is equal to the ground potential. Therefore, in the first modification, as in the first modification of the first embodiment, the current flowing through the connecting wire 17 is measured by an ammeter for each propulsion coil group 8, and the measured value of the measured current is obtained. Based on this, the ground fault position when the ground fault occurs will be determined. Therefore, in the first modification as well as the first modification of the first embodiment, the ground fault position when a ground fault occurs is easily determined while reducing the installation cost of the ground fault position determining device. be able to. When ground line 26 provided for another purpose is used, in the first modification, the installation cost of the ground positioning device is further reduced as compared to the first modification of the first embodiment. Can.

  As shown in FIG. 13, the ground fault position locating system 20 of the first modified example includes a measuring unit 21, a determining unit 22, and a locating unit 23. In the ground fault localization system 20 according to the first modification, the measuring unit 21 measures the current flowing through the connecting wire 17 for each propulsion coil group 8 instead of the potential to the ground potential of the semiconductive layer group 16. It can be made to be the same as the ground fault positioning system (refer to FIG. 12) of the second embodiment except for the above-mentioned point.

  Further, in the ground fault positioning method of the first modification, the current flowing through the connecting wire 17 is measured for each propulsion coil group 8 instead of the potential of the semiconductive layer group 16 with respect to the ground potential. The ground fault positioning method of the second embodiment can be performed in the same manner.

Second Modified Example of Second Embodiment
Next, a ground fault positioning system and a method of positioning a ground fault according to a second modification of the second embodiment will be described. FIG. 14 is a block circuit diagram showing a ground fault localization system according to a second modification of the second embodiment.

  With regard to the ground fault positioning system and the ground fault positioning method of the second modification, the number of propulsion coils included in the propulsion coil group on the opposite side (downstream side) of the inverter side is the propulsion coil on the inverter side (upstream side) The ground fault positioning system and the ground fault positioning method according to the second embodiment can be the same as the second embodiment except that the number is larger than the number of propulsion coils included in the group.

  As shown in FIG. 14, in the second modification, unlike in the second embodiment (see FIG. 12), on the side (downstream side) far from the inverter 11, propulsion is performed more than on the side (upstream side) closer to the inverter 11. The number of propulsion coils 7 that the coil group 8 has is large.

  Among the plurality of propulsion coil groups 8, the propulsion coil group 8 disposed on the side closest to the inverter 11, which is a power supply unit for supplying electric power to the propulsion coil device PD, is an end portion propulsion coil group 81, and a plurality of propulsion coils Of the group 8, the propulsion coil group 8 disposed on the side farthest from the inverter 11 is referred to as an end portion propulsion coil group 82. In this case, the number of propulsion coils 7 (6 in FIG. 14) of the end propulsion coil group 82 is greater than the number of propulsion coils 7 (4 in FIG. 14) of the end propulsion coil group 81. large.

  At the side far from the inverter 11 (downstream side), the voltage applied to the propulsion coil 7 drops compared to the side closer to the inverter 11 (upstream side), so that a ground fault is less likely to occur. Therefore, by making the number of propulsion coils 7 in the end propulsion coil group 82 larger than the number of propulsion coils 7 in the end propulsion coil group 81, the propulsion coil groups on the side (downstream side) far from the inverter 11 It is possible to make the number of propulsion coils 7 included in 8 larger than the number of propulsion coils 7 in the propulsion coil group 8 on the side (upstream side) closer to the inverter 11. Further, the number of voltmeters provided in the propulsion coil device PD can be reduced, the installation cost of the ground positioning device can be reduced, and the measuring circuit for measuring the potential of the semiconductive layer group 16 can be simplified. Can be

  On the other hand, make the number of propulsion coils 7 of the propulsion coil group 8 on the inverter 11 side (upstream side) smaller than the number of propulsion coils 7 of the propulsion coil group 8 on the opposite side (downstream side) to the inverter 11 side. Therefore, on the inverter 11 side (upstream side), it is possible to maintain the position accuracy of positioning the ground fault position when the ground fault occurs.

  In the second modification, in the case of Embodiment 2 in which the potential with respect to the ground potential of the semiconductive layer group 16 is measured for each propulsion coil group 8, the number of propulsion coils 7 included in the end propulsion coil group 82. An example in which the number of the propelling coils 7 included in the end propelling coil group 81 is larger than that of the propelling coil group 81 has been described. However, in the case of the first modification of the second embodiment in which the current flowing through the connecting wire 17 is measured for each propulsion coil group 8, the number of the propulsion coils 7 included in the end propulsion coil group 82 is It may be larger than the number of propulsion coils 7 that the group 81 has.

Third Modified Example of Second Embodiment
Next, a ground fault positioning system and a method of positioning a ground fault according to a third modification of the second embodiment will be described. FIG. 15 is a block circuit diagram showing a ground fault localization system according to a third modification of the second embodiment.

  In the ground fault positioning system and the ground fault positioning method of the third modification, a plurality of semiconductive layers are electrically connected across three propulsion coil units to which three-phase AC power is supplied, respectively. The ground fault positioning system and the ground fault positioning method according to the second embodiment can be the same as the second embodiment except that the semiconductive layer group is formed.

  As shown in FIG. 15, in one feeding section PS, the propulsion coil device PD includes a plurality of propulsion coil groups 8 arranged along the track 1 (see FIG. 1). In addition, each of the plurality of propulsion coil groups 8 includes a plurality of propulsion coils 7 arranged along the track 1. In the example shown in FIG. 15, each of the plurality of propulsion coil groups 8 is arranged along the track 1 by being repeated in the order of U-phase propulsion coil 7U, V-phase propulsion coil 7V, and W-phase propulsion coil 7W. A plurality of propulsion coils 7U, a plurality of propulsion coils 7V, and a plurality of propulsion coils 7W are provided.

  The plurality of conductors 9a respectively included in the plurality of propulsion coils 7U are electrically connected to one another across the plurality of propulsion coil groups 8 in series. Thereby, the plurality of propulsion coils 7U can be electrically connected in series with each other across the plurality of propulsion coil groups 8, and AC power supplied from the inverter 11 (see FIG. 5) In each case, a plurality of propulsion coils 7U can be supplied via the feeding cable 12U (see FIG. 5) and the feeding segment switch 13U (see FIG. 5).

  The plurality of conductors 9 a included in each of the plurality of propulsion coils 7 </ b> V are electrically connected to each other in series across the plurality of propulsion coil groups 8. As a result, the plurality of propulsion coils 7V can be electrically connected in series with each other across the plurality of propulsion coil groups 8, and the AC power supplied from the inverter 11 (see FIG. 5) In each case, a plurality of propulsion coils 7V can be supplied via the feeding cable 12V (see FIG. 5) and the feeding segment switch 13V (see FIG. 5).

  The plurality of conductors 9 a included in each of the plurality of propulsion coils 7 W are electrically connected in series with one another across the plurality of propulsion coil groups 8. As a result, the plurality of propulsion coils 7W can be electrically connected in series with one another across the plurality of propulsion coil groups 8, and the AC power supplied from the inverter 11 (see FIG. 5) In each case, a plurality of propulsion coils 7W can be supplied via the feeding cable 12W (see FIG. 5) and the feeding segment switch 13W (see FIG. 5).

  On the other hand, in the propulsion coil group 8 formed by the plurality of propulsion coils 7U, the plurality of propulsion coils 7V, and the plurality of propulsion coils 7W, the plurality of semiconductive layers 9c respectively included in each of the plurality of propulsion coils 7 are The propulsion coil groups 8 are electrically connected to one another. In the propulsion coil group 8 formed of the plurality of propulsion coils 7U, the plurality of propulsion coils 7V, and the plurality of propulsion coils 7W, the plurality of semiconductive layers 9c electrically connected to each other for each propulsion coil group 8 A semiconductive layer group 16 is formed for each propulsion coil group 8. The semiconductive layer group 16 is grounded via the connection line 17 and the ground line 26 for each propulsion coil group 8.

  In addition, the propulsion coil device PD includes a plurality of voltmeters 18 each measuring the potential of the plurality of semiconductive layer groups 16 with respect to the ground line 26, ie, the potential relative to the ground potential of each of the plurality of semiconductive layer groups 16. ing. In such a case, the potential relative to the ground potential of the semiconductive layer group 16 is measured by the voltmeter 18 for each propulsion coil group 8, and a ground fault occurs when a ground fault occurs based on the measured value of the measured potential. It will determine the position.

  In the third modification, unlike the second embodiment, the propulsion coil group 8 has a plurality of U-phase propulsion coils 7U, a plurality of V-phase propulsion coils 7V, and a plurality of W-phase propulsion coils 7W. Therefore, similar to the effect of the third modification of the first embodiment to the first embodiment, the number of voltmeters 18 provided in the propulsion coil device PD can be reduced to 1/3 as compared with the second embodiment. it can. Therefore, in the third modification, the installation cost of the ground positioning device can be further reduced compared to the second embodiment, and the measurement circuit for measuring the potential of the semiconductive layer group 16 can be further simplified. can do.

  Further, as in the third modification of the first embodiment, with respect to which phase of the U phase, V phase and W phase a ground fault has occurred, the inverter 11 side (upstream side) than the propulsion coil device PD The position accuracy similar to that of the second embodiment can be maintained as the position accuracy for locating the ground fault position when the ground fault occurs since the position can be easily specified.

  In the third modification as well, as in the third modification of the first embodiment, the plurality of semiconductive layers 9c are electrically connected to each other over at least two of the three phases. Should be formed. In such a case, each of the plurality of propulsion coil groups 8 has a plurality of propulsion coils 7U and a plurality of propulsion coils 7V alternately arranged along the track 1 (see FIG. 1). The plurality of semiconductive layers 9c respectively included in each of the plurality of propulsion coils 7U and the plurality of semiconductive layers 9c respectively included in each of the plurality of propulsion coils 7V are electrically connected to each other for each propulsion coil group 8 Will be connected to

Third Embodiment
Next, the ground fault positioning system and the ground fault positioning method of the third embodiment will be described. FIG. 16 is a block circuit diagram showing a ground fault localization system according to a third embodiment. FIG. 17 is a flow chart showing an example of the ground fault localization method according to the third embodiment.

  The ground fault positioning system and the ground fault positioning method of the third embodiment are characterized in that the semiconductive layer group is electrically connected to each other across a plurality of propulsion coil groups. It differs from the entrail positioning system and the ground positioning method. On the other hand, the other points are the same as those of the ground fault position locating system and the ground fault position locating method of the first embodiment, and thus the detailed description will be omitted.

  As shown in FIG. 16, in the third embodiment as well as the first embodiment (see FIG. 6), for example, the U-phase propulsion coil unit 15U of the propulsion coil device PD in the feeding section PS is A plurality of propulsion coil groups 8 are arranged along the track 1 (see FIG. 1) of the floating railway. Further, each of the plurality of propulsion coil groups 8 has a plurality of propulsion coils 7 U arranged along the track 1.

  Also in the third embodiment, as in the first embodiment, each of the plurality of propulsion coils 7U covers the conductor 9a, the insulator 9b covering the conductor 9a (see FIG. 4A), and the insulator 9b. And a semiconductive layer 9c.

  Also in the third embodiment, as in the first embodiment, the plurality of conductors 9a included in each of the plurality of propulsion coils 7 are electrically connected to each other in series across the plurality of propulsion coil groups 8 There is. As a result, the plurality of propulsion coils 7 can be electrically connected in series with one another across the plurality of propulsion coil groups 8, and the AC power supplied from the inverter 11 (see FIG. 5) A plurality of propulsion coils 7 can be supplied via a feeder (see FIG. 5) and a feeder segment switch 13 (see FIG. 5).

  Also in the third embodiment, as in the first embodiment, the plurality of semiconductive layers 9c included in each of the plurality of propulsion coils 7 are electrically connected to one another for each of the propulsion coil groups 8, A semiconductive layer group 16 is formed for each propulsion coil group 8 by a plurality of semiconductive layers 9 c electrically connected to one another every eight.

  On the other hand, in the third embodiment, unlike the first embodiment, an end portion propulsion that is the propulsion coil group 8 disposed at one end ED1 of the array AR1 formed by the plurality of propulsion coil groups 8 The end semiconductive layer group 16E, which is the semiconductive layer group 16 formed in the coil group 83, is grounded to the ground point 28 via the connection line 27. The connection line 27 may be connected to the end portion ED2 on one side of the end portion semiconductive layer group 16E.

  Further, in the third embodiment, the propulsion coil device PD further electrically connects between each of the plurality of semiconductive layer groups 16 respectively formed on each of the plurality of propulsion coil groups 8. A connection line 29 is provided.

  Further, the propulsion coil device PD includes a plurality of ammeters 30 each of which measures the current flowing through each of the connection line 27 and the plurality of connection lines 29. In such a case, the current flowing through each of the connection line 27 and the plurality of connection lines 29 is measured, and based on the measured value of the measured current, to determine the ground fault position when the ground fault occurs. Become.

  As shown in FIG. 16, preferably, the ground fault location system 20 according to the third embodiment includes a measuring unit 21, a determining unit 22, and a locating unit 23.

  The measurement unit 21 measures a current value I1 flowing through the connection line 27 and a plurality of current values I2 flowing respectively through the plurality of connection lines 29.

  The determination unit 22 compares the current value I1 measured by the measurement unit 21 with the reference value IS1, and compares each of the plurality of current values I2 measured by the measurement unit 21 with the reference value IS2. When the current value I1 is equal to or less than the reference value IS1 and any one of the plurality of current values I2 is equal to or less than the reference value IS2, the determination unit 22 generates a ground fault in any of the plurality of propulsion coil groups 8 It determines that it does not do. On the other hand, when the current value I1 exceeds the reference value IS1 or one of the plurality of current values I2 exceeds the reference value IS2, the determination unit 22 causes a ground fault in any of the plurality of propulsion coil groups 8 Determine that it has occurred. The reference value IS2 may not be the same for each of the plurality of current values I2, and may be individually different for each of the plurality of current values I2.

  In the connection portion 27 and the plurality of connection lines 29, the positioning unit 23 is the connection line 27 or connection line 29 in which the current value I1 exceeds the reference value IS1 or the current value I2 exceeds the reference value IS2 When connection line 27 or connection line 29 arranged on the farthest side from ground point 28 is connection line 31, connection line 27 or connection line 29 is arranged on the opposite side to connection point 31 with respect to connection line 31 and connection line 31. By setting the position of the propulsion coil group 8 directly connected, that is, adjacent to the connection line 31 to the ground fault position, the ground fault position when the ground fault occurs is located. Thereby, a concrete ground fault positioning operation can be realized.

  As shown in FIG. 17, preferably, the ground fault location method according to the third embodiment includes a measurement step (step S1), a determination step (step S2), and a positioning step (step S3). .

  In step S1, as shown in FIG. 16, a current value I1 flowing through the connection line 27 and a plurality of current values I2 flowing respectively through the plurality of connection lines 29 are measured.

  In step S2, as shown in FIG. 16, the current value I1 measured in step S1 is compared with the reference value IS1, and each of the plurality of current values I2 measured in step S1 is compared with the reference value IS2. Then, in step S2, when the current value I1 is less than or equal to the reference value IS1, and any of the plurality of current values I2 is less than or equal to the reference value IS2, a ground fault occurs in any of the plurality of propulsion coil groups 8 It judges that it is not. On the other hand, in step S2, when the current value I1 exceeds the reference value IS1 or any of the plurality of current values I2 exceeds the reference value IS2, a ground fault occurs in any of the plurality of propulsion coil groups 8 It is determined that

  In step S3, as shown in FIG. 16, among the connection line 27 and the plurality of connection lines 29, the connection line 27 or the connection line in which the current value I1 exceeds the reference value IS1 or the current value I2 exceeds the reference value IS2. When the connection line 27 or 29 which is disposed on the side farthest from the ground point 28 is the connection line 31, the connection line 27 or 29 is disposed on the opposite side of the connection line 31 to the ground point 28 side. And, by setting the position of the propulsion coil group 8 adjacent to the connection line 31 as the ground fault position, the ground fault position when the ground fault occurs is located.

  In the example shown in FIG. 16, the current value I1 flowing through the connecting line 27 exceeds the reference value IS1, and the current value I2 (current value I21) flowing through the connecting line 29a as the connecting line 29 exceeds the reference value IS2, and the connection is established. When the current value I2 (current value I22) flowing through the connection line 29b as the line 29 is equal to or less than the reference value IS2, the propulsion coil group 84 disposed between the connection line 29a and the connection line 29b is set as the ground fault position. In some cases, the location of the ground fault will be determined.

  In the third embodiment, although the position where the current is measured is different from the first modification of the first embodiment, the ground fault is obtained by comparing the measured values of the current measured by a plurality of ammeters with the reference value. The ground fault position at the time of occurrence will be determined. Therefore, in the third embodiment as well as the first modification of the first embodiment, the ground fault position when the ground fault occurs can be easily determined while reducing the installation cost of the ground fault position determination device. be able to. In addition, when a ground fault occurs, track maintenance such as replacement of the propulsion coil 7 can be easily and reliably performed at the ground fault position that is easily specified.

  In the third embodiment, since it is sufficient to connect the semiconductive layer groups 16 with each other by the connection line 29, the length of the connection line provided for each semiconductive layer group 16 can be shortened. Therefore, in the third embodiment, compared with the first modification of the first embodiment, the installation cost of the ground positioning device can be further reduced.

  As shown in FIG. 16, preferably, the track 1 (see FIG. 1) includes a plurality of structures 1 a arranged along the track 1, and a plurality of propulsion coil groups 8 includes a plurality of structures It is provided in each of 1a. As a result, specifying the ground fault position for each propulsion coil group 8 is equivalent to specifying the ground fault position for each structure 1a, so the ground fault position can be more easily located, and 1 maintenance management can be performed easily and reliably.

  Alternatively, preferably, the track 1 comprises a plurality of structure groups arranged along the track 1 and each of the plurality of structure groups has a plurality of structures 1 a arranged along the track 1 The plurality of propulsion coil groups 8 may be provided to each of the plurality of structure groups. In such a case, locating the ground fault position for each propulsion coil group 8 is equivalent to locating the ground fault position for each structure group, so it is possible to more easily locate the ground fault position. , Maintenance management of the track 1 can be performed easily and reliably.

  Also in the third embodiment, as in the second modification of the first embodiment (see FIG. 10), the number of propulsion coils 7 of the propulsion coil group 8 disposed on the farthest side from the inverter 11 is The number may be larger than the number of propulsion coils 7 of the propulsion coil group 8 disposed closest to the inverter 11. As a result, the number of ammeters included in the propulsion coil device PD can be reduced, the installation cost of the ground positioning device can be reduced, and the measurement circuit for measuring the current flowing through the connection line can be simplified. can do.

  Also in the third embodiment, as in the third modification (see FIG. 11) of the first embodiment, the plurality of semiconductive layers 9c are electrically connected across the three phases, and the semiconductive layer group 16 is It may be formed. As a result, the number of ammeters included in the propulsion coil device PD can be further reduced, the installation cost of the ground positioning device can be further reduced, and the measurement circuit for measuring the current flowing through the connection line can be further simplified. It can be

  As mentioned above, although the invention made by the present inventor was concretely explained based on the embodiment, the present invention is not limited to the embodiment, and can be variously changed in the range which does not deviate from the summary. Needless to say.

  It will be understood by those skilled in the art that various changes and modifications can be made within the scope of the concept of the present invention, and such changes and modifications are also considered to fall within the scope of the present invention.

  For example, those in which a person skilled in the art appropriately adds, deletes, or changes the design of the components or adds, omits, or changes conditions in the above-described embodiments are also included in the present invention. It is included in the scope of the present invention as long as it comprises the gist.

  The present invention is effectively applied to a ground fault positioning method and system for positioning a ground fault when a ground fault occurs in a propulsion coil device provided on a track on which a linear synchronous motor type vehicle travels and a ground fault occurs. It is.

Reference Signs List 1 track 1a structure 2 vehicle 2a side surface portion 2b superconducting magnet 2c refrigeration system 3 traveling path 3a traveling path portion 4 side wall 4a side wall portion 4b side surface portion 5 guide portion 6 floating guide coil 7, 7U, 7V, 7W propulsion coil 7a propulsion coil Body part 7b Connection cable part 7c Connection part 8, 84 Promotion coil group 9a Conductor 9b Insulator 9c Semiconductive layer 9d Winding part 9e Insulating layer 10 Insulating layer 10 Inverter 12 12U, 12V, 12W Feeding cable 13, 13U, 13V, 13W feeder division switch 14 control device 15, 15U, 15V, 15W propulsion coil unit 16 semiconductive layer group 16E end semiconductive layer group 17, 17U, 17V, 17W, 27, 29, 29a, 29b , 31 connection line 18 voltmeter 20 ground fault positioning system 21 measurement unit 22 determination unit 23 positioning unit 25, 30 ammeter 25a clan Meter 25b Clamping part 26 Grounding wire 28 Grounding point 81 to 83 End propulsion coil group AR1 Array ED1, ED2 End I1, I2, I21, I22 Current value PD, PD1 to PD3 Propulsion coil device PS, PS1 to PS3 Feeding section RG1 area TS train service section

Claims (20)

In a ground fault positioning method for positioning a ground fault position when a ground fault occurs in a propulsion coil device provided on a track on which a linear synchronous motor type vehicle travels,
The propulsion coil device comprises a plurality of propulsion coil groups arranged along the track,
Each of the plurality of propulsion coil groups has a plurality of first propulsion coils arranged along the track,
Each of the plurality of first propulsion coils is
The first conductor,
A first insulator covering the first conductor;
A first semiconductive layer covering the first insulator;
Including
The plurality of first conductors respectively included in the plurality of first propulsion coils are electrically connected to each other in series across the plurality of propulsion coil groups,
The plurality of first semiconductive layers respectively included in each of the plurality of first propulsion coils are electrically connected to each other for each of the propulsion coil groups,
The plurality of first semiconductive layers electrically connected to one another for each of the propulsion coil groups form a semiconductive layer group for each of the propulsion coil groups,
The semiconductive layer group is grounded via a first connection line for each of the propulsion coil groups,
The ground fault localization method measures the potential of the semiconductive layer group or the current flowing through the first connection line for each of the propulsion coil groups, and the ground fault is measured based on the measured values. Ground fault location method for locating the ground fault position when it occurs. In the ground fault localization method according to claim 1,
(A) measuring the potential of the semiconductive layer group or the current flowing through the first connection line for each of the propulsion coil groups;
(B) comparing the measured value measured in the step (a) with a reference value, and when the measured value is less than the reference value, the ground fault occurs in the propulsion coil group in which the measured value is measured Determining that no ground fault has occurred, and when the measured value exceeds the reference value, determining that the ground fault has occurred in the propulsion coil group in which the measured value is measured;
(C) setting the position of the propulsion coil group determined to have the ground fault in the step (b) to be the ground fault position, thereby specifying the ground fault position when the ground fault occurs Step,
Ground fault location method having. In the ground fault positioning method according to claim 1 or 2,
A ground positioning method, wherein any two of the semiconductive layer groups are not electrically connected to each other. In the ground fault location method according to any one of claims 1 to 3,
The propulsion coil arrangement comprises a ground wire extending along the track and grounded.
The semiconductive layer group is electrically connected to the ground line via the first connection line for each of the propulsion coil groups, whereby the first connection line and the ground line are formed for each of the propulsion coil groups. Ground positioning method, which is grounded via In the ground fault positioning method according to any one of claims 1 to 4,
Among the plurality of propulsion coil groups, the propulsion coil group disposed on the side closest to the power supply unit for supplying power to the propulsion coil device is taken as a first end propulsion coil group,
When the propulsion coil group disposed on the side farthest from the power supply unit among the plurality of propulsion coil groups is a second end propulsion coil group,
The ground fault locating method according to claim 1, wherein the number of first propulsion coils included in the second end propulsion coil group is larger than the number of first propulsion coils included in the first end propulsion coil group. In the ground fault positioning method according to any one of claims 1 to 5,
Each of the plurality of propulsion coil groups includes a plurality of first propulsion coils and a plurality of second propulsion coils alternately arranged along the track,
Each of the plurality of second propulsion coils is
The second conductor,
A second insulator covering the second conductor;
A second semiconductive layer covering the second insulator;
Including
The plurality of second conductors respectively included in each of the plurality of second propulsion coils are electrically connected to each other in series across the plurality of propulsion coil groups,
The plurality of first semiconductive layers respectively included in each of the plurality of first propulsion coils, and the plurality of second semiconductive layers respectively included in each of the plurality of second propulsion coils are the propulsion coils. Electrically connected to each other in groups
A ground fault in which the semiconductive layer group is formed for each propulsion coil group by the plurality of first semiconductive layers and the plurality of second semiconductive layers electrically connected to each other for each of the propulsion coil groups Positioning method. In a ground fault positioning method for positioning a ground fault position when a ground fault occurs in a propulsion coil device provided on a track on which a linear synchronous motor type vehicle travels,
The propulsion coil device comprises a plurality of propulsion coil groups arranged along the track,
Each of the plurality of propulsion coil groups has a plurality of first propulsion coils arranged along the track,
Each of the plurality of first propulsion coils is
The first conductor,
A first insulator covering the first conductor;
A first semiconductive layer covering the first insulator;
Including
The plurality of first conductors respectively included in the plurality of first propulsion coils are electrically connected to each other in series across the plurality of propulsion coil groups,
The plurality of first semiconductive layers respectively included in each of the plurality of first propulsion coils are electrically connected to each other for each of the propulsion coil groups,
A semiconductive layer group is formed for each of the propulsion coil groups by the plurality of first semiconductive layers electrically connected to each other for each of the propulsion coil groups.
The semiconductive layer group formed in an end portion propulsion coil group which is the propulsion coil group disposed at a first end on a first side of a first arrangement formed by the plurality of propulsion coil groups The end semiconductive layer group is grounded to the ground point via the first connection line,
The propulsion coil device further includes a plurality of second connection lines respectively electrically connecting the plurality of semiconductive layer groups respectively formed on the plurality of propulsion coil groups.
The ground fault localization method measures a current flowing through each of the first connection line and the plurality of second connection lines, and the ground fault occurs when the ground fault occurs based on the measured values measured. Ground positioning method, which determines the position. In the ground fault positioning method according to claim 7,
(A) measuring a first current value flowing through the first connection line, and a plurality of second current values respectively flowing through each of the plurality of second connection lines;
(B) comparing the first current value measured in step (a) with a first reference value, and setting each of the plurality of second current values measured in step (a) as a second reference value In comparison, when the first current value is equal to or less than the first reference value and any one of the plurality of second current values is equal to or less than the second reference value, in any of the plurality of propulsion coil groups When it is determined that the ground fault does not occur, and the first current value exceeds the first reference value, or one of the plurality of second current values exceeds the second reference value, Determining that the ground fault has occurred in any of the plurality of propulsion coil groups;
(C) Among the first connection line and the plurality of second connection lines, the first current value exceeds the first reference value, or the second current value exceeds the second reference value. The third connection line is the first connection line or the second connection line, and the first connection line or the second connection line disposed farthest from the ground point is the third connection line; When the ground fault occurs by setting the position of the propulsion coil group adjacent to the ground connection side relative to the connection line and adjacent to the third connection line as the ground fault position Step to locate the ground position,
Ground fault location method having. The ground fault positioning method according to any one of claims 1 to 8, wherein
The trajectory comprises a plurality of structures arranged along the trajectory,
The ground fault locating method according to claim 1, wherein the plurality of propulsion coil groups are respectively provided to each of the plurality of structures. The ground fault positioning method according to any one of claims 1 to 8, wherein
The orbit comprises a plurality of structure groups arranged along the orbit,
Each of the plurality of structure groups has a plurality of structures arranged along the trajectory,
The ground fault positioning method according to claim 1, wherein the plurality of propulsion coil groups are respectively provided to each of the plurality of structure groups. In a ground fault positioning system for positioning a ground fault position when a ground fault occurs in a propulsion coil device provided on a track on which a linear synchronous motor type vehicle travels,
The propulsion coil device comprises a plurality of propulsion coil groups arranged along the track,
Each of the plurality of propulsion coil groups has a plurality of first propulsion coils arranged along the track,
Each of the plurality of first propulsion coils is
The first conductor,
A first insulator covering the first conductor;
A first semiconductive layer covering the first insulator;
Including
The plurality of first conductors respectively included in the plurality of first propulsion coils are electrically connected to each other in series across the plurality of propulsion coil groups,
The plurality of first semiconductive layers respectively included in each of the plurality of first propulsion coils are electrically connected to each other for each of the propulsion coil groups,
A semiconductive layer group is formed for each of the propulsion coil groups by the plurality of first semiconductive layers electrically connected to each other for each of the propulsion coil groups.
The semiconductive layer group is grounded via a first connection line for each of the propulsion coil groups,
The ground fault localization system measures the potential of the semiconductive layer group or the current flowing through the first connection line for each of the propulsion coil groups, and the ground fault is measured based on the measured values. Ground fault location system which locates the ground fault position when it occurs. In the ground fault localization system according to claim 11,
A measuring unit that measures the potential of the semiconductive layer group or the current flowing through the first connection line for each of the propulsion coil groups;
The measured value measured by the measuring unit is compared with a reference value, and when the measured value is less than or equal to the reference value, the ground fault does not occur in the propulsion coil group in which the measured value is measured A determination unit that determines that, when the measured value exceeds the reference value, the ground fault occurs in the propulsion coil group in which the measured value is measured;
A positioning unit for positioning the ground fault position when the ground fault occurs by setting the position of the propulsion coil group determined to have the ground fault by the determination unit as the ground fault position;
Ground positioning system with. In the ground fault localization system according to claim 11 or 12,
A ground positioning system, wherein no two of the semiconductive layer groups are electrically connected to each other. The ground fault localization system according to any one of claims 11 to 13,
The propulsion coil arrangement comprises a ground wire extending along the track and grounded.
The semiconductive layer group is electrically connected to the ground line via the first connection line for each of the propulsion coil groups, whereby the first connection line and the ground line are formed for each of the propulsion coil groups. Ground positioning system, grounded through. The ground fault localization system according to any one of claims 11 to 14,
Among the plurality of propulsion coil groups, the propulsion coil group disposed on the side closest to the power supply unit for supplying power to the propulsion coil device is taken as a first end propulsion coil group,
When the propulsion coil group disposed on the side farthest from the power supply unit among the plurality of propulsion coil groups is a second end propulsion coil group,
The ground fault positioning system, wherein the number of first propulsion coils included in the second end propulsion coil group is larger than the number of first propulsion coils included in the first end propulsion coil group. In the ground fault localization system according to any one of claims 11 to 15,
Each of the plurality of propulsion coil groups includes a plurality of first propulsion coils and a plurality of second propulsion coils alternately arranged along the track,
Each of the plurality of second propulsion coils is
The second conductor,
A second insulator covering the second conductor;
A second semiconductive layer covering the second insulator;
Including
The plurality of second conductors respectively included in each of the plurality of second propulsion coils are electrically connected to each other in series across the plurality of propulsion coil groups,
The plurality of first semiconductive layers respectively included in each of the plurality of first propulsion coils, and the plurality of second semiconductive layers respectively included in each of the plurality of second propulsion coils are the propulsion coils. Electrically connected to each other in groups
A ground fault in which the semiconductive layer group is formed for each propulsion coil group by the plurality of first semiconductive layers and the plurality of second semiconductive layers electrically connected to each other for each of the propulsion coil groups Positioning system. In a ground fault positioning system for positioning a ground fault position when a ground fault occurs in a propulsion coil device provided on a track on which a linear synchronous motor type vehicle travels,
The propulsion coil device comprises a plurality of propulsion coil groups arranged along the track,
Each of the plurality of propulsion coil groups has a plurality of first propulsion coils arranged along the track,
Each of the plurality of first propulsion coils is
The first conductor,
A first insulator covering the first conductor;
A first semiconductive layer covering the first insulator;
Including
The plurality of first conductors respectively included in the plurality of first propulsion coils are electrically connected to each other in series across the plurality of propulsion coil groups,
The plurality of first semiconductive layers respectively included in each of the plurality of first propulsion coils are electrically connected to each other for each of the propulsion coil groups,
The plurality of first semiconductive layers electrically connected to one another for each of the propulsion coil groups form a semiconductive layer group for each of the propulsion coil groups,
The semiconductive layer group formed in an end portion propulsion coil group which is the propulsion coil group disposed at a first end on a first side of a first arrangement formed by the plurality of propulsion coil groups The end semiconductive layer group is grounded to the ground point via the first connection line,
The propulsion coil device further includes a plurality of second connection lines respectively electrically connecting the plurality of semiconductive layer groups respectively formed on the plurality of propulsion coil groups.
The ground fault localization system measures the current flowing through each of the first connection line and the plurality of second connection lines, and the ground fault occurs when the ground fault occurs based on the measured values measured. Ground positioning system that locates locations. In the ground fault localization system according to claim 17,
A measurement unit configured to measure a first current value flowing through the first connection line, and a plurality of second current values respectively flowing through the plurality of second connection lines;
The first current value measured by the measurement unit is compared with a first reference value, and each of the plurality of second current values measured by the measurement unit is compared with a second reference value, and the first current is measured. When the value is equal to or less than the first reference value and any one of the plurality of second current values is equal to or less than the second reference value, the ground fault occurs in any of the plurality of propulsion coil groups When it is determined that the first current value exceeds the first reference value or any of the plurality of second current values exceeds the second reference value, A determination unit that determines that the ground fault has occurred in any of the above;
Among the first connection line and the plurality of second connection lines, the first connection line in which the first current value exceeds the first reference value or the second current value exceeds the second reference value Alternatively, when the first connection line or the second connection line disposed on the side farthest from the ground point, which is the second connection line, is a third connection line, the third connection line The ground fault position when the ground fault is generated by setting the position of the propulsion coil group adjacent to the third connection line to the ground fault position. The targeting department,
Ground positioning system with. The ground fault localization system according to any one of claims 11 to 18,
The trajectory comprises a plurality of structures arranged along the trajectory,
The ground fault positioning system, wherein the plurality of propulsion coil groups are respectively provided to each of the plurality of structures. The ground fault localization system according to any one of claims 11 to 18,
The orbit comprises a plurality of structure groups arranged along the orbit,
Each of the plurality of structure groups has a plurality of structures arranged along the trajectory,
The ground fault positioning system, wherein the plurality of propulsion coil groups are respectively provided to each of the plurality of structure groups.

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