JP6943756B2 - Ground fault position positioning method and ground fault position positioning system - Google Patents

Description

The present invention relates to a ground fault position locating method and a ground fault position locating system 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 type vehicle travels.

As a magnetic levitation type railway, a linear Synchronous Motor (LSM) system is used, in which a field coil is provided in a vehicle traveling on an orbit and a propulsion coil as an armature coil is provided in the orbit. There was something. As a ground fault position determination method for determining the ground fault position when the propulsion coil in the magnetically levitated railway using this LSM method, that is, the propulsion coil provided on the track on which the linear synchronous motor type vehicle travels, ground faults, for example. When a ground fault occurs, there is a method of determining the ground fault position based on the resonance frequency of the current flowing through the propulsion coil.

Japanese Patent Application Laid-Open No. 2004-334883 (Patent Document 1) describes a plurality of feeders connected to a three-phase feeder cable via an inverter that outputs three-phase AC power, a three-phase feeder cable, and a feeder section switch. A ground fault in an LSM feeder circuit consisting of a power section three-phase propulsion coil, an output filter with one end connected to the output terminal of the feeder and grounded at the other end, and a control device that controls the opening and closing of the feeder division switch. A technique relating to a method for locating a ground fault for a magnetic feeder for locating a point is disclosed.

Further, in Patent Document 1, the output filter, the three-phase electric cable, and the ground fault accident occur when the ground fault occurs and the inverter gate blocks in the magnetically levitated railway ground fault point determination method. _{Based on the resonance frequency f n} of the healthy phase of the closed circuit formed by the electric section three-phase propulsion coil and the ground or the resonance frequency f _f of the unhealthy phase, from one end of the electric section three-phase propulsion coil to the ground fault point. A technique for determining the distance x _{c is disclosed.}

In addition, sensor technology represented by IoT is advancing day by day, and there are remarkable improvements in the performance and cost reduction of the sensor alone, and there are many sensor usage patterns that were previously impossible, such as a large number of sensors along railway lines. It is becoming possible to arrange and use it for maintenance.

Japanese Unexamined Patent Publication No. 2004-343883

In the track of the magnetic levitation type railway, a levitation guide coil is provided on the side surface of the side wall via the propulsion coil, and the propulsion coil cannot be directly observed visually. Therefore, it may be difficult to determine which propulsion coil is ground faulting.

Here, when power is supplied to the transmission line, a method of determining the ground fault position based on the time required for the surge waveform of the current when the ground fault occurs to propagate, that is, a method using a synchro phasor is used. be able to. However, it is difficult to use the same method when supplying electric power to the propulsion coil provided in the track of the magnetic levitation type railway. This is because there is a difference in the characteristic impedance between the propulsion coil main body and the connection cable, and it is difficult to measure and acquire a highly accurate surge waveform. Further, even if a surge waveform with high accuracy is measured, it is difficult to determine the position because the time difference between the waveforms measured at the two points is extremely short.

On the other hand, in the ground fault position positioning method described in Patent Document 1, the current flowing through the propulsion coil is calculated using the measured resonance frequency, and the voltage section from one end of the three-phase propulsion coil to the ground fault point. It is a method of determining the distance of. However, since the method described in Patent Document 1 is a complicated method, the accuracy of the positioning position may be lowered, and the ground when a ground fault occurs while reducing the installation cost of the ground fault position positioning device. A ground fault position positioning method that can easily position the entanglement position is desired. Further, the above-mentioned problems are not limited to the magnetic levitation type railway, but are also common to the railway on which the linear synchronous motor type vehicle travels.

The present invention has been made to solve the above-mentioned problems of the prior art, and is 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. In the ground fault position locating method for locating a position, a ground fault position locating method capable of easily locating a ground fault position when a ground fault occurs while reducing the installation cost of the ground fault position locating device is provided. The purpose is.

A brief description of typical inventions disclosed in the present application is as follows.

The ground fault position locating method as one aspect of the present invention is a ground fault position locating 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 type vehicle travels. be. In the ground fault position positioning method, the propulsion coil device includes a plurality of propulsion coil groups arranged along the orbit, and each of the plurality of propulsion coil groups is a plurality of first propulsion coils arranged along the orbit. Each of the plurality of first propulsion coils includes a first conductor, a first insulator covering the first conductor, and a first semi-conductive layer covering the first insulator. The plurality of first conductors included in each of the plurality of first propulsion coils are electrically connected in series with each other over the plurality of propulsion coil groups, and the plurality of first conductors included in each of the plurality of first propulsion coils are each included. The first semi-conductive layer is electrically connected to each other for each propulsion coil group, and the semi-conductive layer group is formed for each propulsion coil group by a plurality of first semi-conductive layers electrically connected to each other for each propulsion coil group. The semi-conductive layer group formed is grounded via the first connecting wire for each propulsion coil group. Then, in the ground fault position positioning method, the potential of the semi-conductive layer group or the current flowing through the first connecting line is measured for each propulsion coil group, and a ground fault occurs based on the measured measured values. Position the ground fault at the time.

Further, as another aspect, the ground fault position positioning method may include the step (a) of measuring the potential of the semi-conductive layer group or the current flowing through the first connecting line for each propulsion coil group. good. Further, in the ground fault position determination method, the measured value measured in step (a) is compared with the reference value, and when the measured value is equal to or less than the reference value, a ground fault occurs in the propulsion coil group in which the measured value is measured. It may have a step (b) in which it is determined that the ground fault has not occurred and when the measured value exceeds the reference value, it is determined that a ground fault has occurred in the propulsion coil group in which the measured value has been measured. Further, in the ground fault position positioning method, the ground fault position when the ground fault occurs is defined by setting the position of the propulsion coil group determined to have generated the ground fault in step (b) as the ground fault position. (C) It may have a step.

Further, as another aspect, neither of the two semi-conductive group groups need to be electrically connected to each other.

Further, as another aspect, the propulsion coil device includes a grounding wire extending along the track and being grounded, and the semi-conductive layer group is grounded via the first connecting wire for each propulsion coil group. By being electrically connected to the wire, each propulsion coil group may be grounded via the first connecting wire and the grounding wire.

Further, as another aspect, among the plurality of propulsion coil groups, the propulsion coil group arranged on the side closest to the power supply unit that supplies power to the propulsion coil device is designated as the first end propulsion coil group, and a plurality of propulsion coil groups are used. When the propulsion coil group arranged on the side farthest from the power supply unit among the propulsion coil groups is the second end propulsion coil group, the number of the first propulsion coils possessed by the second end propulsion coil group is the first. It may be larger than the number of first propulsion coils possessed by one end propulsion coil group.

Further, as another aspect, each of the plurality of propulsion coil groups has a plurality of first propulsion coils and a plurality of second propulsion coils arranged alternately along the track, and the plurality of second propulsion coils of the plurality of propulsion coils. Each may include a second conductor, a second insulator covering the second conductor, and a second semi-conductive layer covering the second insulator. The plurality of second conductors included in each of the plurality of second propulsion coils are electrically connected in series with each other over the plurality of propulsion coil groups, and the plurality of second conductors included in each of the plurality of first propulsion coils are each included. The first semi-conductive layer and the plurality of second semi-conductive layers included in each of the plurality of second propulsion coils are electrically connected to each other for each propulsion coil group, and electrically to each other for each propulsion coil group. A semi-conductive layer group may be formed for each propulsion coil group by the plurality of connected first semi-conductive layers and the plurality of second semi-conductive layers.

The ground fault position locating method as one aspect of the present invention is a ground fault position locating 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 type vehicle travels. be. In the ground fault position positioning method, the propulsion coil device includes a plurality of propulsion coil groups arranged along the orbit, and each of the plurality of propulsion coil groups is a plurality of first propulsion coils arranged along the orbit. Each of the plurality of first propulsion coils includes a first conductor, a first insulator covering the first conductor, and a first semi-conductive layer covering the first insulator. The plurality of first conductors included in each of the plurality of first propulsion coils are electrically connected in series with each other over the plurality of propulsion coil groups, and the plurality of first conductors included in each of the plurality of first propulsion coils are each included. The first semi-conductive layer is electrically connected to each other for each propulsion coil group, and the semi-conductive layer group is formed for each propulsion coil group by a plurality of first semi-conductive layers electrically connected to each other for each propulsion coil group. It is formed. The end half, which is a semi-conductive layer group formed in the end propulsion coil group, which is the propulsion coil group arranged at the first end on the first side of the first arrangement formed by the plurality of propulsion coil groups. The conductive layer group is grounded to the grounding point via the first connecting wire, and the propulsion coil device further conducts electricity between each of the plurality of semi-conductive layer groups formed in each of the plurality of propulsion coil groups. It is provided with a plurality of second connecting lines that are specifically connected to each other. Then, the ground fault position determination method measures the current flowing through each of the first connecting line and the plurality of second connecting lines, and based on the measured measured values, determines the ground fault position when the ground fault occurs. Position.

Further, as another aspect, the ground fault position positioning method measures a first current value flowing through the first connecting line and a plurality of second current values flowing through each of the plurality of second connecting lines (each of the plurality of second connecting lines). a) It may have steps. Further, in the ground fault position positioning method, the first current value measured in step (a) is compared with the first reference value, and each of the plurality of second current values measured in step (a) is seconded. When the first current value is equal to or less than the first reference value and all of the plurality of second current values are equal to or less than the second reference value as compared with the reference value, a ground fault occurs in any of the plurality of propulsion coil groups. Is not generated, and when the first current value exceeds the first reference value, or when any of the plurality of second current values exceeds the second reference value, any of the plurality of propulsion coil groups. It may have a step (b) of determining that a ground fault has occurred in the coil. Further, in the ground fault position positioning method, 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. When the first connection line or the second connection line which is the first connection line or the second connection line and is arranged on the side farthest from the grounding point is the third connection line, it is in contact with the third connection line. The step (c) of determining the ground fault position when a ground fault occurs by setting the position of the propulsion coil group located on the opposite side to the point side and adjacent to the third connecting line as the ground fault position is performed. You may have.

Further, as another aspect, the track includes a plurality of structures arranged along the track, and a plurality of propulsion coil groups may be provided in each of the plurality of structures.

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

The ground fault position locating system as one aspect of the present invention is a ground fault position locating system 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 type vehicle travels. be. In the ground fault positioning system, the propulsion coil device includes a plurality of propulsion coil groups arranged along the orbit, and each of the plurality of propulsion coil groups is a plurality of first propulsion coils arranged along the orbit. Each of the plurality of first propulsion coils includes a first conductor, a first insulator covering the first conductor, and a first semi-conductive layer covering the first insulator. The plurality of first conductors included in each of the plurality of first propulsion coils are electrically connected in series with each other over the plurality of propulsion coil groups, and the plurality of first conductors included in each of the plurality of first propulsion coils are each included. The first semi-conductive layer is electrically connected to each other for each propulsion coil group, and the semi-conductive layer group is formed for each propulsion coil group by a plurality of first semi-conductive layers electrically connected to each other for each propulsion coil group. The semi-conductive layer group formed is grounded via the first connecting wire for each propulsion coil group. Then, the ground fault positioning system measures the potential of the semi-conductive layer group or the current flowing through the first connecting line for each propulsion coil group, and a ground fault occurs based on the measured measured values. Position the ground fault at the time.

Further, as another aspect, the ground fault positioning system may have a measuring unit for measuring the potential of the semi-conductive layer group or the current flowing through the first connecting line for each propulsion coil group. In addition, the ground fault position determination system compares the measured value measured by the measuring unit with the 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 have a determination unit for determining that the measurement value is not present and when the measured value exceeds the reference value, it is determined that a ground fault has occurred in the propulsion coil group in which the measured value is measured. In addition, the ground fault position positioning system defines the ground fault position when a ground fault occurs by setting the position of the propulsion coil group determined by the determination unit as the ground fault position. It may have a part.

Further, as another aspect, neither of the two semi-conductive group groups need to be electrically connected to each other.

Further, as another aspect, the propulsion coil device includes a grounding wire extending along the track and being grounded, and the semi-conductive layer group is grounded via the first connecting wire for each propulsion coil group. By being electrically connected to the wire, each propulsion coil group may be grounded via the first connecting wire and the grounding wire.

Further, as another aspect, among the plurality of propulsion coil groups, the propulsion coil group arranged on the side closest to the power supply unit that supplies power to the propulsion coil device is designated as the first end propulsion coil group, and a plurality of propulsion coil groups are used. When the propulsion coil group arranged on the side farthest from the power supply unit among the propulsion coil groups is the second end propulsion coil group, the number of the first propulsion coils possessed by the second end propulsion coil group is the first. It may be larger than the number of first propulsion coils possessed by one end propulsion coil group.

Further, as another aspect, each of the plurality of propulsion coil groups has a plurality of first propulsion coils and a plurality of second propulsion coils arranged alternately along the track, and the plurality of second propulsion coils of the plurality of propulsion coils. Each may include a second conductor, a second insulator covering the second conductor, and a second semi-conductive layer covering the second insulator. The plurality of second conductors included in each of the plurality of second propulsion coils are electrically connected in series with each other over the plurality of propulsion coil groups, and the plurality of second conductors included in each of the plurality of first propulsion coils are each included. The first semi-conductive layer and the plurality of second semi-conductive layers included in each of the plurality of second propulsion coils are electrically connected to each other for each propulsion coil group, and electrically to each other for each propulsion coil group. A semi-conductive layer group may be formed for each propulsion coil group by the plurality of connected first semi-conductive layers and the plurality of second semi-conductive layers.

The ground fault position locating system as one aspect of the present invention is a ground fault position locating system 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 type vehicle travels. be. In the ground fault positioning system, the propulsion coil device includes a plurality of propulsion coil groups arranged along the orbit, and each of the plurality of propulsion coil groups is a plurality of first propulsion coils arranged along the orbit. Each of the plurality of first propulsion coils includes a first conductor, a first insulator covering the first conductor, and a first semi-conductive layer covering the first insulator. The plurality of first conductors included in each of the plurality of first propulsion coils are electrically connected in series with each other over the plurality of propulsion coil groups, and the plurality of first conductors included in each of the plurality of first propulsion coils are each included. The first semi-conductive layer is electrically connected to each other for each propulsion coil group, and the semi-conductive layer group is formed for each propulsion coil group by a plurality of first semi-conductive layers electrically connected to each other for each propulsion coil group. It is formed. The end half, which is a semi-conductive layer group formed in the end propulsion coil group, which is the propulsion coil group arranged at the first end on the first side of the first arrangement formed by the plurality of propulsion coil groups. The conductive layer group is grounded to the grounding point via the first connecting wire, and the propulsion coil device further conducts electricity between each of the plurality of semi-conductive layer groups formed in each of the plurality of propulsion coil groups. It is provided with a plurality of second connecting lines that are specifically connected to each other. Then, the ground fault position determination system measures the current flowing through each of the first connection line and the plurality of second connection lines, and based on the measured measured values, determines the ground fault position when the ground fault occurs. Position.

Further, as another aspect, the ground fault positioning system measures a first current value flowing through the first connecting line and a plurality of second current values flowing through each of the plurality of second connecting lines. It may have a part. In addition, the ground fault position positioning 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. However, when the first current value is equal to or less than the first reference value and all of the plurality of second current values are equal to or less than the second reference value, a ground fault has occurred in any of the plurality of propulsion coil groups. When it is determined that there is no 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. May have a determination unit for determining that has occurred. Further, in the ground fault position positioning system, 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. When the first connection line or the second connection line which is the first connection line or the second connection line and is arranged on the side farthest from the grounding point is the third connection line, it is in contact with the third connection line. By setting the position of the propulsion coil group located on the opposite side to the point side and adjacent to the third connecting line as the ground fault position, it has a reference portion for defining the ground fault position when a ground fault occurs. You may.

Further, as another aspect, the track includes a plurality of structures arranged along the track, and a plurality of propulsion coil groups may be provided in each of the plurality of structures.

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

By applying one aspect of the present invention, in the ground fault position determining method for determining the ground fault position when a ground fault occurs in the propulsion coil device provided on the track on which the linear synchronous motor type vehicle travels, the ground fault While reducing the installation cost of the position positioning device, it is possible to easily position the ground fault position when a ground fault occurs.

It is a perspective view which shows typically the track of the magnetic levitation type railway to which the ground fault position positioning system of Embodiment 1 is applied. It is sectional drawing which shows typically the track of the magnetic levitation type railway to which the ground fault position positioning system of Embodiment 1 is applied. It is a figure which shows typically the arrangement of the propulsion coil which the propulsion coil device to which the ground fault position positioning system of Embodiment 1 is applied. FIG. 5 is a cross-sectional view of a propulsion coil included in a propulsion coil device to which the ground fault position positioning system of the first embodiment is applied. It is a block circuit diagram which shows the feeder circuit which supplies electric power to the propulsion coil device to which the ground fault position positioning system of Embodiment 1 is applied. It is a block circuit diagram which shows the ground fault position positioning system of Embodiment 1. FIG. It is a flow chart which shows an example of the ground fault position positioning method of Embodiment 1. FIG. It is a block circuit diagram which shows the ground fault position positioning system of the 1st modification of Embodiment 1. FIG. It is a figure for demonstrating the method of collectively measuring the current flowing through three connection lines. It is a block circuit diagram which shows the ground fault position positioning system of the 2nd modification of Embodiment 1. FIG. It is a block circuit diagram which shows the ground fault position positioning system of the 3rd modification of Embodiment 1. FIG. It is a block circuit diagram which shows the ground fault position positioning system of Embodiment 2. It is a block circuit diagram which shows the ground fault position positioning system of the 1st modification of Embodiment 2. It is a block circuit diagram which shows the ground fault position positioning system of the 2nd modification of Embodiment 2. It is a block circuit diagram which shows the ground fault position positioning system of the 3rd modification of Embodiment 2. It is a block circuit diagram which shows the ground fault position positioning system of Embodiment 3. It is a flow chart which shows an example of the ground fault position positioning method of Embodiment 3.

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

It should be noted that the disclosure is merely an example, and those skilled in the art can easily conceive of appropriate changes while maintaining the gist of the invention are naturally included in the scope of the present invention. Further, in order to clarify the description, the drawings may schematically represent the width, thickness, shape, etc. of each part as compared with the embodiment, but this is just an example, and the interpretation of the present invention is used. It is not limited.

Further, in the present specification and each figure, the same elements as those described above with respect to the above-mentioned figures may be designated by the same reference numerals, and detailed description thereof may be omitted as appropriate.

Further, in the drawings used in the embodiments, hatching (shading) attached to distinguish the structures may be omitted depending on the drawings.

In the following embodiments, when the range is indicated as A to B, A or more and B or less are indicated unless otherwise specified.

(Embodiment 1)
<Magnetic levitation railroad track>
First, the track of the magnetic levitation type railway to which the ground fault positioning system of the first embodiment is applied will be described. The railway to which the ground fault position positioning system of the first embodiment is applied may be any railway in which a linear synchronous motor vehicle travels on the 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 type railway to which the ground fault positioning system of the first embodiment is applied. FIG. 2 is a cross-sectional view schematically showing the track of a magnetic levitation type railway to which the ground fault positioning system of the first embodiment is applied.

As shown in FIGS. 1 and 2, the track 1 of the magnetic levitation railway to which the ground fault position positioning system of the first embodiment is applied is the track on which the vehicle 2 of the magnetic levitation railway travels, and the track 3 And two side walls 4 provided on the traveling path 3 at intervals in the width direction of the traveling path 3. The travel path 3 may be divided into a plurality of travel path portions 3a along the travel direction of the vehicle 2, that is, the track 1, and the side wall 4 corresponds to the plurality of travel path portions 3a along the track 1. It may be divided into a plurality of side wall portions 4a. When the structure 1a is formed by the traveling path portion 3a and the side wall portion 4a corresponding to the traveling path portion 3a, the track 1 includes a plurality of structures 1a arranged along the track 1. ..

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

That is, the magnetic levitation type railway shown in FIGS. 1 and 2 includes a superconducting magnet 2b provided on the vehicle 2, that is, on the vehicle, and a levitation guide coil 6 and a propulsion coil 7 provided on the track 1, that is, on the ground. This is a magnetic levitation type railway that applies a levitation force, a guiding force, and a propulsive force to the vehicle 2 by an electromagnetic interaction, that is, an electromagnetic force, to move the vehicle 2 at high speed in a non-contact manner with respect to the track 1.

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

<Propulsion coil device>
Next, the propulsion coil device to which the ground fault position positioning system of the first embodiment is applied will be described. FIG. 3 is a diagram schematically showing an arrangement of propulsion coils included in a propulsion coil device to which the ground fault position positioning system of the first embodiment is applied.

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

As shown in FIG. 3, the plurality of propulsion coils 7 included in the propulsion coil device PD are such that the propulsion coils 7 of each of the three-phase AC U-phase, V-phase, and W-phase are U along the orbit 1. It is repeatedly arranged in the order of phase, V phase, W phase, U phase, V phase, W phase, and so on, that is, in the order of U phase, V phase, and W phase. In FIG. 3, the U-phase propulsion coil 7 is displayed as a propulsion coil 7U, the V-phase propulsion coil 7 is displayed as a propulsion coil 7V, and the W-phase propulsion coil 7 is displayed as a propulsion coil 7W.

In the example shown in FIG. 3, each of the plurality of propulsion coils 7 is provided at both ends of the propulsion coil main body 7a and the propulsion coil main body 7a, and is connected to each of the two connection cable portions 7b, respectively. It has two connecting portions 7c and. Further, by connecting the two connecting portions 7c of each of the two propulsion coils 7 adjacent to each other in each phase by the connecting cable portion 7b, a plurality of propulsion coils 7 are sequentially connected for each phase to supply power. Connected to. The voltage applied to the propulsion coil 7 is, for example, 6.6 to 33 kV. The electric circuit including the power supply will be described with reference to FIG. 5, which will be described later.

As shown in FIG. 3, the propulsion coil 7 is fixed to the side wall 4 by, for example, sandwiching it with a mounting bracket or a levitation guide coil. The propulsion coil 7 is a coil formed by a wound conductor. Although the number of turns of the propulsion coil 7, that is, the number of turns is simplified to 2 in FIG. 3, a coil having a required number of turns can be formed. Further, since the number of windings can be increased by one degree 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 will be 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 a resin. The case where it is applied will be described as an example. However, the propulsion coil device PD of the present embodiment is also applicable to a propulsion coil device having a coil having the same function as the propulsion coil and having a coil having another structure.

FIG. 4 is a cross-sectional view of a propulsion coil included in the propulsion coil device to which the ground fault position positioning system of the first embodiment is applied. FIG. 4A shows a cross section of the entire propulsion coil, and FIG. 4B shows an enlarged region RG1 surrounded by a chain double-dashed line in FIG. 4A.

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

As shown in FIG. 4B, the periphery of the conductor 9a is covered with the insulating layer 9e. Although not shown, the connection cable portion 7b has a core wire as a conductor, an insulating layer covering the core wire, and a sheath layer as a semi-conductive layer covering the insulating layer. The semi-conductive layer 9c of the propulsion coil 7 is connected to the sheath layer of the connecting cable portion 7b, and the potential of the semi-conductive layer 9c of the propulsion coil 7 is equal to the potential of the sheath layer of the connecting 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 this specification, and is electrically conductive, the electrical conductivity means not less than 10 6 ^{S /} m, and has a semiconductive, electric conductivity exceeds 10 -6 ^{S / m} And, ^{it means the case where it is less than 10 6} S / m, and having the insulating property means the case where the electric conductivity is ^10-6 S / m or less.

As the conductor 9a, for example, a conductor made of a copper wire, an aluminum wire, or the like can be used. As the insulator 9b, one made of an insulating material such as epoxy can be used. As the semi-conductive layer 9c, for example, a base resin having an ethylene-vinyl acetate copolymer (EVA) containing vinyl acetate (VA) and a propylene-olefin copolymer and having insulating properties, and a base resin contained in the base resin. And, a semi-conductive resin composition having a conductive carbon black and a semi-conductive resin composition can be used.

<Feeder circuit device>
Next, a feeder circuit device that supplies electric power to the propulsion coil device of the magnetic levitation type railway to which the ground fault position positioning system of the first embodiment is applied will be described. FIG. 5 is a block circuit diagram showing a feeder circuit for supplying electric power to a propulsion coil device to which the ground fault position positioning system of the first embodiment is applied.

As shown in FIG. 5, the feeder circuit device 10 that supplies power to the propulsion coil device PD includes an inverter 11 and three feeders that are supplied with three-phase AC power of U-phase, V-phase, and W-phase, respectively. It includes an electric cable 12, a plurality of propulsion coil devices PD, a plurality of feeder division switches 13, and a control device 14. In FIG. 5, the feeder cable 12 to which the U-phase AC power is supplied is displayed as the feeder cable 12U, the feeder cable 12 to which the V-phase AC power is supplied is displayed as the feeder cable 12V, and the W-phase is displayed. The feeder cable 12 to which the AC power of the above is supplied is displayed as the feeder cable 12W. Each of the three feeder cables 12U, 12V and 12W extends along track 1 (see FIG. 1). Each of the three feeder cables 12U, 12V and 12W is connected to the output terminal of the inverter 11, and each of the three feeder cables 12U, 12V and 12W is an inverter via the feeder division switch 13. A supply of three-phase AC power of U-phase, V-phase, and W-phase is provided by 11.

The train operation section TS in which the vehicle 2 (see FIG. 1) traveling on the track 1 (see FIG. 1) is operated as a train is divided into a plurality of feeder section PSs each having a feeder section length. The propulsion coil device PD and the feeder division switch 13 are arranged for each feeder section PS. The feeder section length is usually longer than the train length, for example 500 m. In FIG. 5, three feeder sections PS1, PS2 and PS3 are shown as feeder sections PS, but in reality, the train operation section is divided into a large number of three or more feeder sections. You may.

Each of the feeder sections PS1, PS2 and PS3 is provided with a propulsion coil device PD. In FIG. 5, three propulsion coil device PDs provided in each of the feeder sections PS1, PS2 and PS3 are displayed as propulsion coil devices PD1, PD2 and PD3. In the following, the power supply section PS1 will be described on behalf of the power supply sections PS1, PS2 and PS3, but each of the power supply sections PS2 and PS3 can be the same as the power supply section PS1.

The propulsion coil device PD provided in the feeder section PS1 has three propulsion coil units 15 to which each of three phases of U-phase, V-phase, and W-phase AC power is supplied. In FIG. 5, the propulsion coil unit 15 to which the U-phase AC power is supplied is displayed as the propulsion coil unit 15U, the propulsion coil unit 15 to which the V-phase AC power is supplied is displayed as the propulsion coil unit 15V, and the W-phase is displayed. The propulsion coil unit 15 to which the AC power is supplied is indicated as the propulsion coil unit 15W.

The feeder section switch 13 is provided for each feeder section PS, and the feeder section PS is in a state where the propulsion coil device PD and the electric cable 12 are not electrically connected, and the propulsion coil device PD. When the electric cable 12 is electrically connected to the electric cable 12, the state is switched. In other words, the feeder division switch 13 connects the propulsion coil device PD and the feeder cable 12 so as to be electrically openable and closable to each other.

In FIG. 5, when the propulsion coil device PD is used for the U phase, the electric power division switch 13 which electrically connects the electric cable 12 to the electric cable 12 is displayed as the electric power division switch 13U, and when the V phase is the propulsion coil device PD. Electrically connect to the electric cable 12 so that it can be opened and closed The electric switch 13 is displayed as the electric switch 13V, and the propulsion coil device PD and the electric cable 12 are electrically connected to the electric cable 12 for the W phase. The coil-classified switch 13 is displayed as the coil-classified switch 13W.

One end of the propulsion coil section 15U is connected to the feeder cable 12U via the feeder section switch 13U, and one end of the propulsion coil section 15V is connected to the feeder cable 12V via the feeder section switch 13V. One end of the portion 15W is connected to the feeder cable 12W via the feeder division switch 13W. Further, the other end of the propulsion coil portion 15U, the other end of the propulsion coil portion 15V, and the other end of the propulsion coil portion 15W may be electrically connected to each other as shown in FIG. In some cases, a cable (N-ray) having a neutral potential different from that of the cable is provided and connected to the cable (N-ray).

As described above, each of the feeder sections PS2 and PS3 can be the same as the feeder section PS1. Then, the control device 14 controls the inverter 11 and the feeder section switch 13 according to the program, so that the propulsion coil device PD has three for each feeder section PS, for example, according to the operation status of the train. Controls whether to supply or not supply phase AC power.

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

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

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

FIG. 6 shows the U phase of the three propulsion coil units 15 of the propulsion coil device PD provided in the electric power section PS shown in FIG. 5 and to which each of the three-phase AC power is supplied. The propulsion coil portion 15U to which the AC power of the above is supplied is shown (the same applies to FIGS. 8, 10, 12, 14 and 16). Further, in FIG. 6, for simplification of understanding, the propulsion coil 7 is shown so as to have a short rectangular shape instead of the coil-shaped 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 the electric train section PS, the U-phase propulsion coil portion 15U included in the propulsion coil device PD is a plurality of propulsion coils arranged along the track 1 (see FIG. 1) of the magnetic levitation type railway. It has a group 8. Further, 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 a U-phase propulsion coil 7U 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 a conductor 9a, an insulator 9b covering the conductor 9a, and a semi-conductive layer 9c covering the insulator 9b.

The plurality of conductors 9a included in each of the plurality of propulsion coils 7 are electrically connected in series with each other over the plurality of propulsion coil groups 8. As a result, the plurality of propulsion coils 7 can be electrically connected in series with each other over the plurality of propulsion coil groups 8, and the AC power supplied from the inverter 11 (see FIG. 5) can be supplied to the feeder cable 12. It can be supplied to the plurality of propulsion coils 7 via the feeder section switch 13 (see FIG. 5) and the feeder division switch 13 (see FIG. 5).

The plurality of semi-conductive layers 9c included in each of the plurality of propulsion coils 7 are electrically connected to each other for each propulsion coil group 8. A semi-conductive layer group 16 is formed for each propulsion coil group 8 by a plurality of semi-conductive layers 9c electrically connected to each other for each propulsion coil group 8. The semi-conductive layer group 16 is grounded via a connecting wire 17 for each propulsion coil group 8. In other words, the entire semi-conductive layer 9c contained in each of the plurality of propulsion coils 7 would be formed if they were electrically connected to each other over the entire 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 ground-faulted propulsion coil 7, the entire semi-conductive layer group formed by a plurality of semi-conductive layers 9c which may normally be electrically connected to each other in the entire propulsion coil group. , It is divided into a plurality of semi-conductive layer groups 16 and divided.

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

In the example shown in FIG. 6, the U-phase propulsion coil 7U is divided into three groups in the electric section PS, and the semi-conductive layer 9c is commonly grounded in each group. Although FIG. 6 shows only the U-phase propulsion coil 7U, as shown in FIG. 3, the propulsion coil device PD actually includes not only the U-phase propulsion coil 7U shown in FIG. 6 but also V. It has a phase propulsion coil 7V and a W phase propulsion coil 7W.

Further, the propulsion coil device PD includes a plurality of voltmeters 18 for measuring the potentials of the plurality of semi-conductive layer groups 16 with respect to the ground potential. In such a case, the potential of the semi-conductive layer group 16 with respect to the ground potential is measured by the voltmeter 18 for each propulsion coil group 8, and based on the measured potential value, the ground fault occurs when the ground fault occurs. The position will be located.

When the propulsion coil 7 is installed, for example, on the back side of the levitation guide coil 6 (see FIG. 2), it is difficult to visually monitor whether or not the state of the propulsion coil 7 is sound. Further, even if an abnormality such as a ground fault occurs in the propulsion coil 7, the appearance may not be changed. That is, as described with reference to FIG. 2, when the propulsion coil 7 cannot be directly visually observed, including the case where the levitation guide coil 6 is provided on the side surface portion 4b of the side wall 4 via the propulsion coil 7. , It can be difficult to determine which propulsion coil 7 is ground faulting. In such a case, even if a ground fault occurs, the propulsion coil 7 in which the ground fault has occurred cannot be identified, so it may take time to replace and recover 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 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 measured. A method of determining the ground fault position based on the time required to propagate between a plurality of positions, that is, a method using a synchro phasor can be used.

However, it is difficult to use the same method when supplying electric power to the propulsion coil 7 provided on the track 1 (see FIG. 1) of the magnetic levitation type railway. This is because the propulsion coil, which is the medium through which the surge waveform propagates, is not a uniform medium. For example, there is a difference in characteristic impedance between the propulsion coil main body 7a (see FIG. 3) and the connection cable 7b (see FIG. 3). It is due to something. That is, every time the propagated surge waveform passes through the boundary between the propulsion coil main body 7a and the connection cable 7b, the surge waveform is transmitted and reflected, and the waveform is attenuated and complicated. , It becomes difficult to measure the surge waveform with high accuracy.

Here, a ground fault position determination method in which the potential of the semi-conductive layer 9c included in the propulsion coil 7 is measured to determine the ground fault position can be considered. According to such a ground fault position positioning method, it is not necessary to use a method using a synchro phasor, so there is no need to worry about whether or not a surge waveform with high accuracy can be measured.

A plurality of semi-conductive layers 9c contained in each of the plurality of propulsion coils 7 are electrically connected to each other over the plurality of propulsion coil groups 8 and electrically connected to each other over the plurality of propulsion coil groups 8. Consider a case where a semi-conductive layer group is formed by a plurality of semi-conductive layers 9c, and the formed semi-conductive layer group is grounded via one connecting wire. In such a case, as a ground fault position determination method, the potential with respect to the ground potential of the semi-conductive layer group integrally formed over the plurality of propulsion coil groups 8 is measured, and the plurality of propulsion coil groups 8 are measured. Regardless of the position of the ground fault, a large current flows through the connecting line and the potential of the semi-conductive layer group with respect to the ground potential rises. It can be easily determined that a ground fault has occurred somewhere in 8. However, it is not possible to determine where in the plurality of propulsion coil groups 8 the ground fault has occurred.

Alternatively, consider a case where a plurality of semi-conductive layers 9c included in each of the plurality of propulsion coils 7 are grounded via a connecting wire for each propulsion coil 7. In such a case, as a ground fault position determination method, the potential of the semiconductive layer 9c with respect to the ground potential is measured for each propulsion coil 7, and no matter which propulsion coil 7 causes a ground fault, the propulsion thereof is performed. A large current flows through the connection line connected to the semi-conductive layer 9c of the coil 7, and the potential of the semi-conductive layer 9c with respect to the ground potential rises. Therefore, when a ground fault occurs based on the measured value of the measured potential. The position of the ground fault can be determined. However, in such a case, since the potential of the semi-conductive layer 9c with respect to the ground potential is measured for each propulsion coil 7, it is necessary to provide as many voltmeters as there are propulsion coils 7, which increases the installation cost of the ground fault position locating device. However, the measurement circuit for measuring the potential of the semiconducting layer 9c becomes complicated.

In the ground fault position determination method described in Patent Document 1, the distance from one end of the electric section three-phase propulsion coil to the ground fault point is calculated by using the measured resonance frequency for the current flowing through the propulsion coil. It is a method of locating the frequency, which is a useful method but complicated. Therefore, a ground fault position positioning method capable of easily positioning the ground fault position when a ground fault occurs while reducing the installation cost of the ground fault position positioning device is desired.

On the other hand, in the first embodiment, the semi-conductive layer group 16 is formed for each propulsion coil group 8 by the plurality of semi-conductive layers 9c electrically connected to each other for each propulsion coil group 8, and the semi-conductive layer group 16 is formed. Is grounded via the connecting wire 17 for each propulsion coil group 8. In such a case, as a ground fault position determination method, the potential of the semi-conductive layer group 16 with respect to the ground potential 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 connecting line 17 via the semiconductive layer group 16, and the potential with respect to the ground potential of the semiconductive layer group 16 rises. Therefore, the measured potential is measured. Based on the value, it is possible to easily determine which propulsion coil group 8 the ground fault has occurred in, and it is possible to easily determine the ground fault position when the ground fault occurs.

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

That is, according to the ground fault position locating system and the ground fault position locating method of the first embodiment, the potential of the semiconductive layer group 16 with respect to the ground potential is measured for each propulsion coil group 8 and the measured potential is measured. Based on the value, the position of the ground fault when the ground fault occurs is determined. Therefore, it is possible to easily position the ground fault position when the ground fault occurs while reducing the installation cost of the ground fault position positioning device. Then, when a ground fault occurs, it is possible to easily and surely perform maintenance management of the track such as replacement of the propulsion coil 7 at the easily defined ground fault position. Alternatively, when a ground fault occurs, the ground fault position can be instantly determined, and immediately after the train operation is completed, maintenance work of the track 1 such as replacement of the propulsion coil 7 at the ground fault position can be started.

Specifically, the propulsion coil group 8 can include, for example, 3 to 5 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.

Further, the ground fault position locating system and the ground fault position locating method of the first embodiment are described on the converter side in the amount of change in the resonance frequency of the current waveform when a ground fault occurs, which is described in Patent Document 1. It may be used in combination with the method of specifying the ground fault position by measuring with. As a result, the accuracy of locating the ground fault position when a ground fault occurs can be further improved.

As shown in FIG. 6, preferably, the ground fault position locating system 20 of the first embodiment has a measuring unit 21, a determining unit 22, and a locating unit 23. The measuring unit 21 measures the potential of the semi-conductive layer group 16 with respect to the ground potential for each propulsion coil group 8. The determination unit 22 compares the measured value measured by the measuring unit 21 with the reference value, and when the measured value is equal to or less than the reference value, it is determined that no ground fault has 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. The positioning unit 23 defines 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 as the ground fault position. As a result, a specific ground fault position positioning work can be realized.

As shown in FIG. 7, preferably, the ground fault position locating method of the first embodiment includes a measurement step (step S1), a determination step (step S2), and a locating step (step S3). .. In step S1, the potential of the semi-conductive layer group 16 (see FIG. 6) with respect to the ground potential is measured for each propulsion coil group 8 (see FIG. 6). In step S2, the measured value measured in step S1 is compared with the reference value, and when the measured value is equal to or less than the reference value, it is determined that no ground fault has 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, the position of the propulsion coil group 8 determined to have generated the ground fault is set as the ground fault position, so that the ground fault position when the ground fault occurs is determined. As a result, a specific ground fault position positioning work can be realized.

In addition, in FIG. 7, in consideration of the first modification of the first embodiment described later, in step S1, "the potential of the semi-conductive layer group or the current flowing through the connecting line is measured for each propulsion coil group". It is described.

As shown in FIG. 6, preferably, neither of the two semi-conductive group groups 16 is electrically connected to each other. As a result, the potential of the semi-conductive layer group 16 with respect to the ground potential can be reliably measured for each propulsion coil group 8, and the ground fault position when a ground fault occurs can be reliably determined in units of the propulsion coil group 8. can do.

Further, as shown in FIGS. 1 and 6, preferably, the track 1 includes a plurality of structures (guideways) 1a arranged along the track 1, and the plurality of propulsion coil groups 8 includes a plurality of propulsion coil groups 8. Each of the structures 1a is provided (hereinafter, the same applies to the first modification to the third modification of the first embodiment). As a result, defining the ground fault position for each propulsion coil group 8 is synonymous with defining the ground fault position for each structure 1a, so that the ground fault position can be more easily defined and the orbit. The maintenance management of 1 can be easily and surely performed.

Specifically, for example, the length of the structure (guideway) 1a is set to about 10 m, and one propulsion coil group 8 having a length of about 10 m is provided corresponding to the one structure 1a. It is assumed that the semi-conductive layer group 16 is grounded by the connecting 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 semi-conductive layer group 16 is measured for each propulsion coil group 8, it is the position accuracy when determining the ground fault position when a ground fault occurs in the propulsion coil device PD. As the positioning accuracy, a positioning accuracy of about 10 m can be obtained. That is, when a ground fault occurs, it is possible to determine which structure 1a the ground fault occurred in.

Alternatively, preferably, the orbit 1 includes a plurality of structures arranged along the orbit 1, and each of the plurality of structure groups has a plurality of structures 1a arranged along the orbit 1. However, the plurality of propulsion coil groups 8 may be provided in each of the plurality of structure groups (hereinafter, the same applies to the first modification to the third modification of the first embodiment). In such a case, defining the ground fault position for each propulsion coil group 8 is synonymous with defining the ground fault position for each structure group, so that the ground fault position can be more easily defined. , Maintenance and management of the track 1 can be easily and surely performed.

Specifically, the number of parts of the propulsion coil group to be divided into the entire propulsion coil group can be determined by the balance between the positioning accuracy when locating the ground fault position and the installation cost of the voltmeter.

The ground fault position determination system or ground fault position determination method of the first embodiment is applied to all of the propulsion coil device PD, that is, all of the track 1 (see FIG. 1) where the propulsion coil 7 is installed. , No need to install or implement. Therefore, in the ground fault position locating system and the ground fault position locating method of the first embodiment, the voltage applied to the propulsion coil 7 of the feeder section PS, which is considered to be relatively prone to ground faults, is relatively high. It may be installed or implemented only in a high section. Alternatively, the ground fault position locating system and the ground fault position locating method of the first embodiment are installed or installed in the feeder section PS in which the voltage applied to the propulsion coil 7 is relatively high among the plurality of feeder section PSs. It may be carried out.

<First Modified Example of Embodiment 1>
Next, the ground fault position locating system and the ground fault position locating method of the first modification of the first embodiment will be described. FIG. 8 is a block circuit diagram showing a ground fault position positioning system according to a first modification of the first embodiment.

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

As shown in FIG. 8, also in the first modification, as in the first embodiment (see FIG. 6), the propulsion coils are formed by a plurality of semi-conductive layers 9c electrically connected to each other for each propulsion coil group 8. A semi-conductive layer group 16 is formed for each group 8, and the semi-conductive layer group 16 is grounded for each propulsion coil group 8 via a connecting wire 17. On the other hand, in the first modification, unlike the first embodiment, the propulsion coil device PD includes a plurality of ammeters 25 for measuring currents 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 only for the propulsion coil group 8 of one phase of the U phase, the V phase, and the W phase, but the current flowing through the connecting wire 17 may be measured at the same location, for example. The currents flowing through the three connecting wires 17 that ground 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 applied. It may be measured. A method of collectively measuring the currents flowing through the three connecting lines 17 will be described with reference to FIG. In FIG. 9, three connecting wires 17 for grounding each of the U-phase, V-phase, and W-phase three-phase propulsion coil groups 8 are shown as connecting wires 17U, 17V, and 17W.

As shown in FIG. 9, in order to measure the current flowing through the three connecting lines 17U, 17V and 17W in a three-phase batch, for example, a clamp meter 25a as an ammeter 25 can be used. At this time, the three connecting lines 17U, 17V and 17W of the U phase, the V phase and the W phase are collectively clamped by the clamp portion 25b of the clamp meter 25a, so that the three connecting lines 17U, 17V and 17W The current flowing through the two phases can be measured collectively in three phases (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 semi-conductive layers 9c contained in each of the plurality of propulsion coils 7 are electrically connected to each other over the plurality of propulsion coil groups 8 and electrically connected to each other over the plurality of propulsion coil groups 8. Consider a case where a semi-conductive layer group is formed by a plurality of semi-conductive layers 9c, and the formed semi-conductive layer group is grounded via one connecting wire. In such a case, the ground fault position determination method is to measure the current flowing through the one connecting line, but the connecting line may occur at any position of the plurality of propulsion coil groups 8. Since a large current flows through the coil, 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 is not possible to determine where in the plurality of propulsion coil groups 8 the ground fault has occurred.

Alternatively, consider a case where a plurality of semi-conductive layers 9c included in each of the plurality of propulsion coils 7 are grounded via a connecting wire for each propulsion coil 7. In such a case, as a ground fault position determination method, the current flowing through the connecting wire is measured for each propulsion coil 7, but no matter which propulsion coil 7 causes a ground fault, the propulsion coil 7 Since a large current flows through the connecting line connected to the semi-conductive layer 9c, the ground fault position when a 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 line for each propulsion coil 7, it is necessary to provide as many ammeters as the number of propulsion coils 7, which increases the installation cost of the ground fault position locating device and increases the installation cost. The measurement circuit that measures the current flowing through the connection line becomes complicated.

On the other hand, in the first modification, unlike the first embodiment, the propulsion coil device PD includes a plurality of current meters 25 for measuring the currents flowing through each of the plurality of connecting lines 17, but the first embodiment includes the plurality of current meters 25. Similar to 1, a semi-conductive layer group 16 is formed for each propulsion coil group 8 by a plurality of semi-conductive layers 9c electrically connected to each other for each propulsion coil group 8, and the semi-conductive layer group 16 is a propulsion coil. Each group 8 is grounded via the connecting wire 17. In such a case, as a ground fault position determination method, the current flowing through the connecting line 17 is measured for each propulsion coil group 8, but when a ground fault occurs in any of the propulsion coil groups 8, the propulsion thereof Since a large current flows through the connecting wire 17 in the coil group 8, it is possible to easily determine which propulsion coil group 8 has a ground fault based on the measured value of the current measured by the ammeter 25. , The position of the ground fault when a ground fault occurs can be easily determined.

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

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

Specifically, the propulsion coil group 8 may include, for example, 3 to 5 propulsion coils, as described above in the first embodiment. 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 the ammeters are installed for each propulsion coil 7.

As shown in FIG. 8, the ground fault position locating system 20 of the first modification is the same as the ground fault position locating system 20 (see FIG. 6) of the first embodiment, that is, the measuring unit 21 and the determination unit. It has 22 and a positioning unit 23. Further, in the ground fault position positioning system 20 of 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 with respect to the ground potential of the semiconductive layer group 16. The same can be applied to the ground fault positioning system 20 (see FIG. 6) of the first embodiment, except that the above points are to be observed.

Further, in the ground fault position determination method of the first modification, in step S1, instead of the potential with respect to the ground potential of the semiconductive layer group 16 (see FIG. 8), the current flowing through the connecting line 17 (see FIG. 8) is used. , Except that the measurement is performed for each propulsion coil group 8 (see FIG. 8), the same can be applied to the ground fault position positioning method (see FIG. 7) of the first embodiment.

Specifically, the number of parts of the propulsion coil group to be divided into the entire propulsion coil group can be determined by the balance between the positioning accuracy when locating the ground fault position and the installation cost of the ammeter. Further, the first modification may be used in combination with the first embodiment, and the voltmeter and the ammeter may be used in combination to determine the ground fault position (the first modification of the second embodiment and the second embodiment). The same applies to and).

<Second variant of Embodiment 1>
Next, the ground fault position locating system and the ground fault position locating method of the second modification of the first embodiment will be described. FIG. 10 is a block circuit diagram showing a ground fault position positioning system according to a second modification of the first embodiment.

Regarding the ground fault position locating system and the ground fault position locating method of this second modification, the number of propulsion coils possessed by the propulsion coil group on the opposite side (downstream side) from the inverter side is the propulsion coil on the inverter side (upstream side). It can be the same as the ground fault position positioning system and the ground fault position positioning method of the first embodiment except that the number of propulsion coils is larger than that of 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 a plurality of semi-conductive layers 9c electrically connected to each other for each propulsion coil group 8. A semi-conductive layer group 16 is formed for each group 8, and the semi-conductive layer group 16 is grounded for each propulsion coil group 8 via a connecting wire 17. Further, the propulsion coil device PD includes a plurality of voltmeters 18 for measuring the potentials of the plurality of semi-conductive layer groups 16 with respect to the ground potential. In such a case, the potential of the semi-conductive layer group 16 with respect to the ground potential is measured by the voltmeter 18 for each propulsion coil group 8, and based on the measured potential value, the ground fault occurs when the ground fault occurs. The position will be located.

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 farther from the inverter 11 (downstream side) than on the side closer to the inverter 11 (upstream side). Is big.

Of the plurality of propulsion coil groups 8, the propulsion coil group 8 arranged on the side closest to the inverter 11 which is the power supply unit for supplying power to the propulsion coil device PD is designated as the end propulsion coil group 81, and the plurality of propulsion coils are formed. Of the group 8, the propulsion coil group 8 arranged on the farthest side of the inverter 11 is referred to as the end propulsion coil group 82. In this way, the number of propulsion coils 7 in the end propulsion coil group 82 (6 in FIG. 10) is larger than the number of propulsion coils 7 in the end propulsion coil group 81 (4 in FIG. 10). big.

On the side far from the inverter 11 (downstream side), the voltage applied to the propulsion coil 7 is lower than that on the side closer to the inverter 11 (upstream side), so that ground faults are less likely to occur. Therefore, by making the number of propulsion coils 7 possessed by the end propulsion coil group 82 larger than the number of propulsion coils 7 possessed by the end propulsion coil group 81, the propulsion coil group on the side (downstream side) far from the inverter 11 The number of propulsion coils 7 possessed by 8 can be made larger than the number of propulsion coils 7 possessed by the propulsion coil group 8 on the side closer to the inverter 11 (upstream side). Then, the number of voltmeters included in the propulsion coil device PD can be reduced, the installation cost of the ground fault position positioning device can be reduced, and the measurement circuit for measuring the potential of the semi-conductive layer group 16 is simplified. Can be.

On the other hand, the number of propulsion coils 7 possessed by the propulsion coil group 8 on the inverter 11 side (upstream side) should be smaller than the number of propulsion coils 7 possessed by the propulsion coil group 8 on the side opposite to the inverter 11 side (downstream side). Therefore, on the inverter 11 side (upstream side), it is possible to maintain the position accuracy of defining 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 propulsion coils 7 possessed by the propulsion coil group 8 is gradually increased. It is more preferable to let it.

Further, in the second modification, in the case of the first embodiment in which the potential of the semi-conductive layer group 16 with respect to the ground potential is measured for each propulsion coil group 8, the number of propulsion coils 7 possessed by the end propulsion coil group 82. Has been described as an example in which the number of propulsion coils 7 of the end propulsion coil group 81 is larger than the number of propulsion coils 7. 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 propulsion coils 7 possessed by the end propulsion coil group 82 is determined by the end propulsion coil. It may be larger than the number of propulsion coils 7 included in the group 81.

<Third variant of Embodiment 1>
Next, the ground fault position locating system and the ground fault position locating method of the third modification of the first embodiment will be described. FIG. 11 is a block circuit diagram showing a ground fault position positioning system according to a third modification of the first embodiment.

Regarding the ground fault position positioning system and the ground fault position positioning method of the third modification, a plurality of semi-conductive layers are electrically connected over three propulsion coil portions to which three-phase AC power is supplied. It can be the same as the ground fault position positioning system and the ground fault position positioning method of the first embodiment except that the semi-conductive layer group is formed.

FIG. 11 shows three units that the propulsion coil device PD provided in the electric power section PS shown in FIG. 5 is provided with three-phase AC power of U-phase, V-phase, and W-phase, respectively. The propulsion coil portions 15U, 15V and 15W are shown (the same applies to FIG. 15).

As shown in FIG. 11, in the electric transmission section PS, the propulsion coil device PD includes a plurality of propulsion coil groups 8 arranged along the track 1 (see FIG. 1). Further, each of the plurality of propulsion coil groups 8 has 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 repeatedly arranged along the orbit 1 in the order of the U-phase propulsion coil 7U, the V-phase propulsion coil 7V, and the W-phase propulsion coil 7W. It has a plurality of propulsion coils 7U, a plurality of propulsion coils 7V, and a plurality of propulsion coils 7W.

The plurality of conductors 9a included in each of the plurality of propulsion coils 7U are electrically connected in series with each other over the plurality of propulsion coil groups 8. As a result, the plurality of propulsion coils 7U can be electrically connected in series with each other over the plurality of propulsion coil groups 8, and the AC power supplied from the feeder 11 (see FIG. 5) is supplied to the propulsion coil unit 15U. Each can be supplied to a plurality of propulsion coils 7U via a feeder cable 12U (see FIG. 5) and a feeder division switch 13U (see FIG. 5).

Further, the plurality of conductors 9a included in each of the plurality of propulsion coils 7V are electrically connected in series with each other over the plurality of propulsion coil groups 8. As a result, a plurality of propulsion coils 7V can be electrically connected in series with each other over the plurality of propulsion coil groups 8, and the AC power supplied from the feeder 11 (see FIG. 5) is transferred to the propulsion coil unit 15V. Each can be supplied to a plurality of propulsion coils 7V via a feeder cable 12V (see FIG. 5) and a feeder division switch 13V (see FIG. 5).

Further, the plurality of conductors 9a included in each of the plurality of propulsion coils 7W are electrically connected in series with each other over the plurality of propulsion coil groups 8. As a result, the plurality of propulsion coils 7W can be electrically connected in series with each other over the plurality of propulsion coil groups 8, and the AC power supplied from the feeder 11 (see FIG. 5) is transferred to the propulsion coil unit 15W. Each can be supplied to a plurality of propulsion coils 7W via a feeder cable 12W (see FIG. 5) and a feeder division 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 semi-conductive layers 9c included in each of the plurality of propulsion coils 7 are formed. Each propulsion coil group 8 is electrically connected to each other. 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 semi-conductive layers 9c electrically connected to each other for each propulsion coil group 8 are used. A semi-conductive layer group 16 is formed for each propulsion coil group 8. The semi-conductive layer group 16 is grounded via a connecting wire 17 for each propulsion coil group 8. In other words, the entire semi-conductive layer 9c contained in each of the plurality of propulsion coils 7 would be formed if they were electrically connected to each other over the entire 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 semi-conductive layers 9c are repeatedly connected in the order of the semi-conductive layer 9c of the propulsion coil 7U, the semi-conductive layer 9c of the propulsion coil 7V, and the semi-conductive layer 9c of the propulsion coil 7W. However, it suffices to be connected for each propulsion coil group 8, and the order of connection is not particularly limited. Further, the connection of the semi-conductive layer 9c of each phase to the connection line 17 may be either a series connection or a parallel connection.

Further, the propulsion coil device PD includes a plurality of voltmeters 18 for measuring the potentials of the plurality of semi-conductive layer groups 16 with respect to the ground potential. In such a case, the potential of the semi-conductive layer group 16 with respect to the ground potential is measured by the voltmeter 18 for each propulsion coil group 8, and based on the measured potential value, the ground fault occurs when the ground fault occurs. The position will be located.

In the third modification as well, as in the first embodiment, the potential of the semi-conductive layer group 16 may be measured for each propulsion coil group 8, so that it is not necessary to install as many voltmeters as the number of propulsion coils 7. .. Therefore, the number of voltmeters included in the propulsion coil device PD can be reduced, the installation cost of the ground fault position positioning device can be reduced, and the measurement circuit for measuring the potential of the semiconductive layer group 16 is simple. Can be.

On the other hand, in the third modification, unlike the first 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, the number of voltmeters 18 included in the propulsion coil device PD can be reduced to 1/3 as compared with the first embodiment. Therefore, in the third modification, the installation cost of the ground fault position locating device can be further reduced as compared with the first embodiment, and the measurement circuit for measuring the potential of the semiconductive layer group 16 is further simplified. can do.

In the third modification, unlike the first embodiment, only by measuring the potential of the semiconducting layer group 16 with respect to the ground potential, which phase of the U phase, V phase, and W phase occurs when a ground fault occurs. However, it is difficult to determine whether the ground fault occurred in the U-phase, V-phase, or W-phase, for example, the current flowing through the substation or the electric potential cable. Since it can be easily identified by measuring the current flowing at a certain position or the potential at a certain position on the inverter 11 side (upstream side) of the propulsion coil device PD, the ground when a ground fault occurs. As the position accuracy for defining the entanglement position, the same position accuracy as in the first embodiment can be maintained.

In this third modification, an example in which a plurality of semi-conductive layers 9c are electrically connected to form a semi-conductive layer group 16 over three phases has been described. However, it is sufficient that the plurality of semi-conductive layers 9c are electrically connected to form the semi-conductive layer group 16 over at least two of the three phases. In such a case, each of the plurality of propulsion coil groups 8 will have a plurality of propulsion coils 7U and a plurality of propulsion coils 7V alternately arranged along the track 1 (see FIG. 1). Then, the plurality of semi-conductive layers 9c contained in each of the plurality of propulsion coils 7U and the plurality of semi-conductive layers 9c contained 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.

(Embodiment 2)
Next, the ground fault position locating system and the ground fault position locating method of the second embodiment will be described. FIG. 12 is a block circuit diagram showing the ground fault position positioning system of the second embodiment.

In the ground fault position locating system and the ground fault position locating method of the second embodiment, the propulsion coil device is provided with a grounding wire extending along the track and grounded, and the semi-conductive layer group is a propulsion coil. It differs from the ground fault position locating system and the ground fault position locating method of the first embodiment in that each group is electrically connected to the ground wire via a connecting wire. On the other hand, 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 detailed description thereof will be omitted.

As shown in FIG. 12, in the second embodiment as well as in the first embodiment (see FIG. 6), in the electric wire section PS, for example, the U-phase propulsion coil portion 15U included in the propulsion coil device PD is magnetic. It includes a plurality of propulsion coil groups 8 arranged along the track 1 (see FIG. 1) of the levitation type railway. Further, each of the plurality of propulsion coil groups 8 has a plurality of propulsion coils 7U arranged along the track 1.

In the second embodiment as well, 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. Includes a semi-conductive layer 9c.

Also in the second embodiment, similarly to the first embodiment, the plurality of conductors 9a included in each of the plurality of propulsion coils 7 are electrically connected in series with each other over 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 each other over the plurality of propulsion coil groups 8, and the AC power supplied from the inverter 11 (see FIG. 5) can be supplied to the feeder cable 12. It can be supplied to the plurality of propulsion coils 7 via the feeder section switch 13 (see FIG. 5) and the feeder division switch 13 (see FIG. 5).

Also in the second embodiment, similarly to the first embodiment, the plurality of semi-conductive layers 9c included in each of the plurality of propulsion coils 7 are electrically connected to each other for each propulsion coil group 8, and the propulsion coil group A semi-conductive layer group 16 is formed for each propulsion coil group 8 by a plurality of semi-conductive layers 9c electrically connected to each other for each eight.

On the other hand, in the second embodiment, unlike the first embodiment, the propulsion coil device PD includes a ground wire 26 extending along the track 1 (see FIG. 1) and being grounded. Then, the semi-conductive layer group 16 is electrically connected to the ground wire 26 for each propulsion coil group 8 via the connection wire 17, so that the semi-conductive layer group 16 is electrically connected to the ground wire 26 for each propulsion coil group 8 via the connection wire 17 and the ground wire 26. Be grounded.

Further, the propulsion coil device PD includes a plurality of voltmeters 18 for measuring the potentials of the plurality of semi-conductive layer groups 16 with respect to the ground wire 26, respectively. However, since the ground wire 26 is grounded, the ground wire 26 is grounded. The potential of 26 is equal to the ground potential. Therefore, in the second embodiment as well, the propulsion coil device PD is provided with a plurality of voltmeters 18 for measuring the potentials of the plurality of semiconductive layer groups 16 with respect to the ground potential, respectively, as in the first embodiment. Further, also in the second embodiment, as in the first embodiment, the potential of the semi-conductive layer group 16 with respect to the ground potential is measured by the voltmeter 18 for each propulsion coil group 8, and the measured potential is used as the measured value. Based on this, the position of the ground fault when the ground fault occurs will be determined. Therefore, also in the second embodiment, as in the first embodiment, the ground fault position when the ground fault occurs can be easily positioned while reducing the installation cost of the ground fault position positioning device. Further, when a ground fault occurs, it is possible to easily and surely perform maintenance management of the track such as replacement of the propulsion coil 7 at the easily defined ground fault position.

For example, when it is decided that a ground wire 26 is further provided along a plurality of propulsion coils 7 provided along the track 1 (see FIG. 1) for a purpose different from the purpose of determining the ground fault position. Can be used for the purpose of determining the ground fault position, and the length of the connecting wire 17 provided for each semi-conductive layer group 16 can be shortened. When the ground wire 26 provided for another purpose is used as described above, in the second embodiment, the installation cost of the ground fault position locating device can be further reduced as compared with the first embodiment.

As shown in FIG. 12, the ground fault position locating system 20 of the second embodiment includes a measuring unit 21, a determining unit 22, and a locating unit 23. Further, since measuring the potential of the semi-conductive layer group 16 with respect to the ground wire 26 is synonymous with measuring the potential of the semi-conductive layer group 16 with respect to the ground potential, the ground fault position determination system of the second embodiment 20 can be the same as the ground fault position positioning system 20 (see FIG. 6) of the first embodiment. Further, in the ground fault position positioning method of the second embodiment, measuring the potential of the semi-conductive layer group 16 with respect to the ground wire 26 is synonymous with measuring the potential of the semi-conductive layer group 16 with respect to the ground potential. Therefore, the same can be applied to the ground fault position determination method of the first embodiment (see FIG. 7).

Further, as shown in FIG. 12, preferably, the track 1 (see FIG. 1) includes a plurality of structures 1a arranged along the track 1, and the plurality of propulsion coil groups 8 includes a plurality of structures. Each of 1a is provided (hereinafter, the same applies to the first modification to the third modification of the second embodiment). As a result, defining the ground fault position for each propulsion coil group 8 is synonymous with defining the ground fault position for each structure 1a, so that the ground fault position can be more easily defined and the orbit. The maintenance management of 1 can be easily and surely performed.

Alternatively, preferably, the orbit 1 includes a plurality of structures arranged along the orbit 1, and each of the plurality of structure groups has a plurality of structures 1a arranged along the orbit 1. However, the plurality of propulsion coil groups 8 may be provided in each of the plurality of structure groups (hereinafter, the same applies to the first modification to the third modification of the second embodiment). In such a case, defining the ground fault position for each propulsion coil group 8 is synonymous with defining the ground fault position for each structure group, so that the ground fault position can be more easily defined. , Maintenance and management of the track 1 can be easily and surely performed.

In the first embodiment, it is necessary to perform a considerably time-consuming grounding 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 perform grounding for each propulsion coil group 8 which is considerably troublesome, and it is possible to perform the grounding for each of the plurality of propulsion coil groups 8 at one place. Therefore, the installation cost of the ground fault position positioning device can be further reduced.

<First Modified Example of Embodiment 2>
Next, the ground fault position locating system and the ground fault position locating method of the first modification of the second embodiment will be described. FIG. 13 is a block circuit diagram showing a ground fault position positioning system of the first modification of the second embodiment.

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

As shown in FIG. 13, in the first modification, unlike the second embodiment (see FIG. 12), the propulsion coil device PD is a plurality of ammeters that measure the current flowing through each of the plurality of connection lines 17. 25 is provided, but as described above, the potential of the ground wire 26 is equal to the ground potential. Therefore, in the first modification, the current flowing through the connecting wire 17 is measured by an ammeter for each propulsion coil group 8 as in the first modification of the first embodiment, and the measured value of the measured current is used. Based on this, the position of the ground fault when the ground fault occurs will be determined. Therefore, in this first modification as well, as in the first modification of the first embodiment, the ground fault position when a ground fault occurs can be easily positioned while reducing the installation cost of the ground fault position positioning device. be able to. Further, when the ground wire 26 provided for another purpose is used, in this first modification, the installation cost of the ground fault position locating device is further reduced as compared with the first modification of the first embodiment. Can be done.

As shown in FIG. 13, the ground fault position locating system 20 of the first modification has a measuring unit 21, a determining unit 22, and a locating unit 23. Further, in the ground fault position positioning system 20 of 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 with respect to the ground potential of the semiconductive layer group 16. It can be the same as the ground fault position positioning system of the second embodiment (see FIG. 12) except that the above point is specified.

Further, in the ground fault position determination 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 with respect to the ground potential of the semiconductive layer group 16. It can be the same as the ground fault position positioning method of the second embodiment.

<Second variant of Embodiment 2>
Next, the ground fault position locating system and the ground fault position locating method of the second modification of the second embodiment will be described. FIG. 14 is a block circuit diagram showing a ground fault position positioning system according to a second modification of the second embodiment.

Regarding the ground fault position locating system and the ground fault position locating method of this second modification, the number of propulsion coils possessed by the propulsion coil group on the opposite side (downstream side) from the inverter side is the propulsion coil on the inverter side (upstream side). It can be the same as the ground fault position locating system and the ground fault position locating method of the second embodiment except that the number of propulsion coils is larger than that of the group.

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

Of the plurality of propulsion coil groups 8, the propulsion coil group 8 arranged on the side closest to the inverter 11 which is the power supply unit for supplying power to the propulsion coil device PD is designated as the end propulsion coil group 81, and the plurality of propulsion coils are formed. Of the group 8, the propulsion coil group 8 arranged on the farthest side of the inverter 11 is referred to as the end propulsion coil group 82. In this way, the number of propulsion coils 7 in the end propulsion coil group 82 (6 in FIG. 14) is larger than the number of propulsion coils 7 in the end propulsion coil group 81 (4 in FIG. 14). big.

On the side far from the inverter 11 (downstream side), the voltage applied to the propulsion coil 7 is lower than that on the side closer to the inverter 11 (upstream side), so that ground faults are less likely to occur. Therefore, by making the number of propulsion coils 7 possessed by the end propulsion coil group 82 larger than the number of propulsion coils 7 possessed by the end propulsion coil group 81, the propulsion coil group on the side (downstream side) far from the inverter 11 The number of propulsion coils 7 possessed by 8 can be made larger than the number of propulsion coils 7 possessed by the propulsion coil group 8 on the side closer to the inverter 11 (upstream side). Then, the number of voltmeters included in the propulsion coil device PD can be reduced, the installation cost of the ground fault position positioning device can be reduced, and the measurement circuit for measuring the potential of the semi-conductive layer group 16 is simplified. Can be.

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

In this second modification, the number of propulsion coils 7 possessed by the end propulsion coil group 82 in the case of the second embodiment in which the potential of the semi-conductive layer group 16 with respect to the ground potential is measured for each propulsion coil group 8. Has been described as an example in which the number of propulsion coils 7 of the end propulsion coil group 81 is larger than the number of propulsion coils 7. 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 propulsion coils 7 possessed by the end propulsion coil group 82 is determined by the end propulsion coil. It may be larger than the number of propulsion coils 7 included in the group 81.

<Third variant of Embodiment 2>
Next, the ground fault position locating system and the ground fault position locating method of the third modification of the second embodiment will be described. FIG. 15 is a block circuit diagram showing a ground fault position positioning system according to a third modification of the second embodiment.

Regarding the ground fault position positioning system and the ground fault position positioning method of the third modification, a plurality of semi-conductive layers are electrically connected over three propulsion coil portions to which three-phase AC power is supplied. It can be the same as the ground fault position positioning system and the ground fault position positioning method of the second embodiment except that the semi-conductive layer group is formed.

As shown in FIG. 15, in the electric transmission section PS, the propulsion coil device PD includes a plurality of propulsion coil groups 8 arranged along the track 1 (see FIG. 1). Further, each of the plurality of propulsion coil groups 8 has 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 repeatedly arranged along the orbit 1 in the order of the U-phase propulsion coil 7U, the V-phase propulsion coil 7V, and the W-phase propulsion coil 7W. It has a plurality of propulsion coils 7U, a plurality of propulsion coils 7V, and a plurality of propulsion coils 7W.

The plurality of conductors 9a included in each of the plurality of propulsion coils 7U are electrically connected in series with each other over the plurality of propulsion coil groups 8. As a result, the plurality of propulsion coils 7U can be electrically connected in series with each other over the plurality of propulsion coil groups 8, and the AC power supplied from the feeder 11 (see FIG. 5) is supplied to the propulsion coil unit 15U. Each can be supplied to a plurality of propulsion coils 7U via a feeder cable 12U (see FIG. 5) and a feeder division switch 13U (see FIG. 5).

Further, the plurality of conductors 9a included in each of the plurality of propulsion coils 7V are electrically connected in series with each other over the plurality of propulsion coil groups 8. As a result, a plurality of propulsion coils 7V can be electrically connected in series with each other over the plurality of propulsion coil groups 8, and the AC power supplied from the feeder 11 (see FIG. 5) is transferred to the propulsion coil unit 15V. Each can be supplied to a plurality of propulsion coils 7V via a feeder cable 12V (see FIG. 5) and a feeder division switch 13V (see FIG. 5).

Further, the plurality of conductors 9a included in each of the plurality of propulsion coils 7W are electrically connected in series with each other over the plurality of propulsion coil groups 8. As a result, the plurality of propulsion coils 7W can be electrically connected in series with each other over the plurality of propulsion coil groups 8, and the AC power supplied from the feeder 11 (see FIG. 5) is transferred to the propulsion coil unit 15W. Each can be supplied to a plurality of propulsion coils 7W via a feeder cable 12W (see FIG. 5) and a feeder division 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 semi-conductive layers 9c included in each of the plurality of propulsion coils 7 are formed. Each propulsion coil group 8 is electrically connected to each other. 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 semi-conductive layers 9c electrically connected to each other for each propulsion coil group 8 are used. A semi-conductive layer group 16 is formed for each propulsion coil group 8. The semi-conductive layer group 16 is grounded for each propulsion coil group 8 via a connecting wire 17 and a grounding wire 26.

Further, the propulsion coil device PD includes a plurality of voltmeters 18 for measuring the potential of each of the plurality of semi-conductive layer groups 16 with respect to the ground wire 26, that is, the potential of each of the plurality of semi-conductive layer groups 16 with respect to the ground potential of each. ing. In such a case, the potential of the semi-conductive layer group 16 with respect to the ground potential is measured by the voltmeter 18 for each propulsion coil group 8, and based on the measured potential value, the ground fault occurs when the ground fault occurs. The position will be located.

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, as in the effect of the third modification of the first embodiment with respect to the first embodiment, the number of voltmeters 18 included in the propulsion coil device PD can be reduced to one-third as compared with the second embodiment. can. Therefore, in the third modification, the installation cost of the ground fault position locating device can be further reduced as compared with the second embodiment, and the measurement circuit for measuring the potential of the semiconductive layer group 16 is further simplified. can do.

Further, as in the third modification of the first embodiment, which phase of the U phase, the V phase, and the W phase the ground fault occurred is determined on the inverter 11 side (upstream side) of the propulsion coil device PD. Since it can be easily specified, it is possible to maintain the same position accuracy as in the second embodiment as the position accuracy for defining the ground fault position when the ground fault occurs.

In this third modification as well, as in the third modification of the first embodiment, the plurality of semi-conductive layers 9c are electrically connected to at least two of the three phases to form the semi-conductive layer group 16. Should be formed. In such a case, each of the plurality of propulsion coil groups 8 will have a plurality of propulsion coils 7U and a plurality of propulsion coils 7V alternately arranged along the track 1 (see FIG. 1). Then, the plurality of semi-conductive layers 9c contained in each of the plurality of propulsion coils 7U and the plurality of semi-conductive layers 9c contained 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.

(Embodiment 3)
Next, the ground fault position locating system and the ground fault position locating method according to the third embodiment will be described. FIG. 16 is a block circuit diagram showing the ground fault position positioning system of the third embodiment. FIG. 17 is a flow chart showing an example of the ground fault position positioning method of the third embodiment.

The ground fault position determination system and the ground fault position determination method of the third embodiment are the ground of the first embodiment in that the semi-conductive layer groups are electrically connected to each other over a plurality of propulsion coil groups. It differs from the entanglement position locating system and the ground fault locating method. On the other hand, 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 detailed description thereof will be omitted.

As shown in FIG. 16, in the third embodiment as well as in the first embodiment (see FIG. 6), in the electric wire section PS, for example, the U-phase propulsion coil portion 15U included in the propulsion coil device PD is magnetic. It includes a plurality of propulsion coil groups 8 arranged along the track 1 (see FIG. 1) of the levitation type railway. Further, each of the plurality of propulsion coil groups 8 has a plurality of propulsion coils 7U arranged along the track 1.

In the third embodiment as well, 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. Includes a semi-conductive layer 9c.

Also in the third embodiment, similarly to the first embodiment, the plurality of conductors 9a included in each of the plurality of propulsion coils 7 are electrically connected in series with each other over 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 each other over the plurality of propulsion coil groups 8, and the AC power supplied from the inverter 11 (see FIG. 5) can be supplied to the feeder cable 12. It can be supplied to the plurality of propulsion coils 7 via the feeder section switch 13 (see FIG. 5) and the feeder division switch 13 (see FIG. 5).

Also in the third embodiment, similarly to the first embodiment, the plurality of semi-conductive layers 9c included in each of the plurality of propulsion coils 7 are electrically connected to each other for each propulsion coil group 8, and the propulsion coil group A semi-conductive layer group 16 is formed for each propulsion coil group 8 by a plurality of semi-conductive layers 9c electrically connected to each other for each eight.

On the other hand, in the third embodiment, unlike the first embodiment, the end propulsion is the propulsion coil group 8 arranged at the end ED1 on one side of the array AR1 formed by the plurality of propulsion coil groups 8. The end semi-conductive layer group 16E, which is the semi-conductive layer group 16 formed in the coil group 83, is grounded to the grounding point 28 via the connecting wire 27. The connecting line 27 may be connected to the end ED2 on one side of the end semi-conductive group 16E.

Further, in the third embodiment, the propulsion coil device PD further electrically connects a plurality of semi-conductive layer groups 16 formed in each of the plurality of propulsion coil groups 8. A connecting line 29 is provided.

Further, the propulsion coil device PD includes a plurality of ammeters 30 for measuring the currents flowing through the connection line 27 and the plurality of connection lines 29, respectively. In such a case, the current flowing through each of the connecting line 27 and the plurality of connecting lines 29 is measured, and the ground fault position when the ground fault occurs is determined based on the measured value of the measured current. Become.

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

The measuring unit 21 measures the current value I1 flowing through the connecting line 27 and the plurality of current values I2 flowing through each of the plurality of connecting 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. Then, when the current value I1 is equal to or less than the reference value IS1 and all of the plurality of current values I2 are equal to or less than the reference value IS2, the determination unit 22 causes a ground fault in any of the plurality of propulsion coil groups 8. Judge that it is not done. On the other hand, when the current value I1 exceeds the reference value IS1 or any 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. Judge that it has occurred. The reference value IS2 does not have to 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.

The reference unit 23 is a connection line 27 or a connection line 29 in which the current value I1 exceeds the reference value IS1 or the current value I2 exceeds the reference value IS2 among the connection line 27 and the plurality of connection lines 29. When the connecting line 27 or the connecting line 29 arranged on the farthest side from the grounding point 28 is used as the connecting line 31, it is arranged on the side opposite to the grounding point 28 side of the connecting line 31 and on the connecting line 31. By setting the position of the propulsion coil group 8 which is directly connected, that is, adjacent to the connecting line 31, as the ground fault position, the ground fault position when the ground fault occurs is defined. As a result, a specific ground fault position positioning work can be realized.

As shown in FIG. 17, preferably, the ground fault position locating method of the third embodiment includes a measurement step (step S1), a determination step (step S2), and a locating step (step S3). ..

In step S1, as shown in FIG. 16, the current value I1 flowing through the connecting line 27 and the plurality of current values I2 flowing through each of the plurality of connecting 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 equal to or less than the reference value IS1 and all of the plurality of current values I2 are equal to or less than the reference value IS2, a ground fault occurs in any of the plurality of propulsion coil groups 8. Judge 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 it has been done.

In step S3, as shown in FIG. 16, of 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 connecting line 27 or the connecting line 29, which is 29 and is arranged on the side farthest from the grounding point 28, is the connecting line 31, it is arranged on the side opposite to the grounding point 28 side of the connecting line 31. Moreover, by setting the position of the propulsion coil group 8 adjacent to the connecting line 31 as the ground fault position, the ground fault position when the ground fault occurs is defined.

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 is connected. When the current value I2 (current value I22) flowing through the connecting wire 29b as the wire 29 is equal to or less than the reference value IS2, the propulsion coil group 84 arranged between the connecting wire 29a and the connecting wire 29b is set as the ground fault position. As a result, the ground fault position will be located.

Also in the third embodiment, the position where the current is measured is different from the first modification of the first embodiment, but the ground fault is caused by comparing the measured value of the current measured by a plurality of ammeters with the reference value. The position of the ground fault when it occurs will be determined. Therefore, also in the third embodiment, as in the first modification of the first embodiment, the ground fault position when the ground fault occurs can be easily positioned while reducing the installation cost of the ground fault position positioning device. be able to. Further, when a ground fault occurs, it is possible to easily and surely perform maintenance management of the track such as replacement of the propulsion coil 7 at the easily defined ground fault position.

In the third embodiment, since the semi-conductive layer groups 16 may be connected to each other by the connecting line 29, the length of the connecting line provided for each of the semi-conductive layer groups 16 can be shortened. Therefore, in the third embodiment, the installation cost of the ground fault position locating device can be further reduced as compared with the first modification of the first embodiment.

As shown in FIG. 16, preferably, the track 1 (see FIG. 1) includes a plurality of structures 1a arranged along the track 1, and the plurality of propulsion coil groups 8 includes a plurality of structures. It is provided in each of 1a. As a result, defining the ground fault position for each propulsion coil group 8 is synonymous with defining the ground fault position for each structure 1a, so that the ground fault position can be more easily defined and the orbit. The maintenance management of 1 can be easily and surely performed.

Alternatively, preferably, the orbit 1 includes a plurality of structures arranged along the orbit 1, and each of the plurality of structure groups has a plurality of structures 1a arranged along the orbit 1. However, the plurality of propulsion coil groups 8 may be provided in each of the plurality of structure groups. In such a case, defining the ground fault position for each propulsion coil group 8 is synonymous with defining the ground fault position for each structure group, so that the ground fault position can be more easily defined. , Maintenance and management of the track 1 can be easily and surely performed.

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

Further, also in the third embodiment, similarly to the third modification of the first embodiment (see FIG. 11), the plurality of semi-conductive layers 9c are electrically connected over the three phases to form the semi-conductive layer group 16. 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 fault position positioning device can be further reduced, and the measurement circuit for measuring the current flowing through the connecting line can be further simplified. Can be something like that.

Although the invention made by the present inventor has been specifically described above based on the embodiment thereof, the present invention is not limited to the embodiment and can be variously modified without departing from the gist thereof. Needless to say.

Within the scope of the idea of the present invention, those skilled in the art can come up with various modified examples and modified examples, and it is understood that these modified examples and modified examples also belong to the scope of the present invention.

For example, a person skilled in the art appropriately adds, deletes, or changes the design of each of the above-described embodiments, or adds, omits, or changes the conditions of the process of the present invention. As long as it has a gist, it is included in the scope of the present invention.

The present invention is effective when applied to a ground fault position locating method and a ground fault position locating system 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 type vehicle travels. Is.

1 Track 1a Structure 2 Vehicle 2a Side part 2b Superconducting magnet 2c Refrigeration system 3 Running path 3a Running path part 4 Side wall 4a Side wall part 4b Side part 5 Guide part 6 Floating guide coil 7, 7U, 7V, 7W Propulsion coil 7a Propulsion coil 7a Main body 7b Connection cable 7c Connection 8,84 Propulsion coil group 9a Conductor 9b Insulator 9c Semi-conductive layer 9d Winding 9e Insulation layer 10 Electric circuit device 11 Inverter 12, 12U, 12V, 12W Electric cable 13, 13U, 13V, 13W Electric power division switch 14 Control device 15, 15U, 15V, 15W Propulsion coil part 16 Semi-conductive layer group 16E End semi-conductive layer group 17, 17U, 17V, 17W, 27, 29, 29a, 29b , 31 Connection line 18 Voltage meter 20 Ground fault position positioning system 21 Measuring unit 22 Judging unit 23 Positioning unit 25, 30 Current meter 25a Clamp meter 25b Clamping unit 26 Grounding wire 28 Grounding point 81-83 End propulsion coil group AR1 Arrangement ED1 , ED2 Ends I1, I2, I21, I22 Current value PD, PD1-PD3 Propulsion coil device PS, PS1-PS3 Conductor section RG1 area TS Train operation section

Claims (20)

In the ground fault position locating method for locating the ground fault position when a ground fault occurs in the propulsion coil device provided on the track on which the linear synchronous motor type vehicle travels.
The propulsion coil device includes 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 trajectory.
Each of the plurality of first propulsion coils
With the first conductor
The first insulator covering the first conductor and
The first semi-conductive layer covering the first insulator and
Including
The plurality of first conductors included in each of the plurality of first propulsion coils are electrically connected in series with each other over the plurality of propulsion coil groups.
The plurality of first semi-conductive layers contained 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 semi-conductive layers electrically connected to each other for each propulsion coil group form a semi-conductive layer group for each propulsion coil group.
The semi-conductive layer group is grounded via the first connecting wire for each propulsion coil group.
In the ground fault position positioning method, the potential of the semi-conductive layer group or the current flowing through the first connecting line is measured for each propulsion coil group, and the ground fault is formed based on the measured measured values. Position the ground fault position when it occurs ,
Among the plurality of propulsion coil groups, the propulsion coil group arranged on the side closest to the power supply unit that supplies electric power to the propulsion coil device is designated as the first end propulsion coil group.
When the propulsion coil group arranged on the side farthest from the power supply unit among the plurality of propulsion coil groups is designated as the second end propulsion coil group.
A ground fault position determination method in which the number of the first propulsion coils possessed by the second end propulsion coil group is larger than the number of the first propulsion coils possessed by the first end propulsion coil group. In the ground fault position positioning method according to claim 1,
Each of the plurality of propulsion coil groups has a plurality of the first propulsion coils and a plurality of second propulsion coils arranged alternately along the track.
Each of the plurality of second propulsion coils
With the second conductor
A second insulator covering the second conductor and
The second semi-conductive layer covering the second insulator and
Including
The plurality of second conductors included in each of the plurality of second propulsion coils are electrically connected in series with each other over the plurality of propulsion coil groups.
The plurality of first semi-conductive layers included in each of the plurality of first propulsion coils and the plurality of second semi-conductive layers included in each of the plurality of second propulsion coils are the propulsion coils. Each group is electrically connected to each other
A ground fault in which the semi-conductive layer group is formed for each propulsion coil group by the plurality of first semi-conductive layers and the plurality of second semi-conductive layers electrically connected to each other for each propulsion coil group. Positioning method. In the ground fault position locating method for locating the ground fault position when a ground fault occurs in the propulsion coil device provided on the track on which the linear synchronous motor type vehicle travels.
The propulsion coil device includes 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 and a plurality of second propulsion coils arranged alternately along the track.
Each of the plurality of first propulsion coils
With the first conductor
The first insulator covering the first conductor and
The first semi-conductive layer covering the first insulator and
Including
Each of the plurality of second propulsion coils
With the second conductor
A second insulator covering the second conductor and
The second semi-conductive layer covering the second insulator and
Including
The plurality of first conductors included in each of the plurality of first propulsion coils are electrically connected in series with each other over the plurality of propulsion coil groups.
The plurality of second conductors included in each of the plurality of second propulsion coils are electrically connected in series with each other over the plurality of propulsion coil groups.
The plurality of first semi-conductive layers included in each of the plurality of first propulsion coils and the plurality of second semi-conductive layers included in each of the plurality of second propulsion coils are the propulsion coils. Each group is electrically connected to each other
The plurality of first semi-conductive layers and the plurality of second semi- conductive layers electrically connected to each other for each propulsion coil group form a semi-conductive layer group for each propulsion coil group.
The semi-conductive layer group is grounded via the first connecting wire for each propulsion coil group.
In the ground fault position positioning method, the potential of the semi-conductive layer group or the current flowing through the first connecting line is measured for each propulsion coil group, and the ground fault is formed based on the measured measurement value. A ground fault position locating method for locating the ground fault position when it occurs. In the ground fault position positioning method according to any one of claims 1 to 3,
(A) A step of measuring the potential of the semi-conductive layer group or the current flowing through the first connecting line for each propulsion coil group.
(B) The measured value measured in the step (a) is compared with a reference value, and when the measured value is equal to or less than the reference value, the ground fault occurs in the propulsion coil group in which the measured value is measured. A step of determining that the ground fault has occurred in the propulsion coil group in which the measured value has been measured, when it is determined that the measured value has not occurred and the measured value exceeds the reference value.
(C) By setting the position of the propulsion coil group determined to have generated the ground fault in the step (b) as the ground fault position, the ground fault position when the ground fault occurs is defined. Step,
A method for locating a ground fault. In the ground fault position positioning method according to any one of claims 1 to 4,
A ground fault positioning method in which neither of the two semi-conductive groups is electrically connected to each other. In the ground fault position positioning method according to any one of claims 1 to 5,
The propulsion coil device includes a grounding wire that extends along the track and is grounded.
The semi-conductive layer group is electrically connected to the grounding wire for each propulsion coil group via the first connecting wire, so that the first connecting wire and the grounding wire are connected to each propulsion coil group. Ground fault positioning method that is grounded through. In the ground fault position locating method for locating the ground fault position when a ground fault occurs in the propulsion coil device provided on the track on which the linear synchronous motor type vehicle travels.
The propulsion coil device includes 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 trajectory.
Each of the plurality of first propulsion coils
With the first conductor
The first insulator covering the first conductor and
The first semi-conductive layer covering the first insulator and
Including
The plurality of first conductors included in each of the plurality of first propulsion coils are electrically connected in series with each other over the plurality of propulsion coil groups.
The plurality of first semi-conductive layers contained 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 semi-conductive layers electrically connected to each other for each propulsion coil group form a semi-conductive layer group for each propulsion coil group.
The semi-conductive layer group formed in the end propulsion coil group, which is the propulsion coil group arranged at the first end on the first side of the first arrangement formed by the plurality of propulsion coil groups. The end semi-conductive layer group is grounded to the grounding point via the first connecting wire.
The propulsion coil device further includes a plurality of second connecting lines for electrically connecting each of the plurality of semi-conductive layer groups formed in each of the plurality of propulsion coil groups.
The ground fault position positioning method measures the current flowing through each of the first connection line and the plurality of second connection lines, and based on the measured measured values, the ground fault when the ground fault occurs. Ground fault position positioning method for positioning the position. In the ground fault position positioning method according to claim 7,
(A) A step of measuring a first current value flowing through the first connecting line and a plurality of second current values flowing through each of the plurality of second connecting lines.
(B) The first current value measured in the step (a) is compared with the first reference value, and each of the plurality of second current values measured in the step (a) is referred to as the second reference value. By comparison, when the first current value is equal to or less than the first reference value and all of the plurality of second current values are equal to or less than the second reference value, any of the plurality of propulsion coil groups When it is determined that the ground fault has not occurred and the first current value exceeds the first reference value, or any of the plurality of second current values exceeds the second reference value. A step of determining that the ground fault has occurred in any of the plurality of propulsion coil groups.
(C) Of 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. When the first connection line or the second connection line which is the first connection line or the second connection line and is arranged on the side farthest from the grounding point is used as the third connection line, the third connection line is used. By setting the position of the propulsion coil group located on the side opposite to the grounding point side of the connecting line and adjacent to the third connecting line as the ground fault position, the ground fault occurs. Steps to determine the location of the ground fault,
A method for locating a ground fault. In the ground fault position positioning method according to any one of claims 1 to 8,
The orbit comprises a plurality of structures arranged along the orbit.
A ground fault position determination method in which the plurality of propulsion coil groups are provided in each of the plurality of structures. In the ground fault position positioning method according to any one of claims 1 to 8,
The orbit comprises a plurality of structures arranged along the orbit.
Each of the plurality of structure groups has a plurality of structures arranged along the orbit.
The plurality of propulsion coil groups are provided in each of the plurality of structure groups, respectively, according to a ground fault position determination method. In a ground fault position positioning system that determines the 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 includes 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 trajectory.
Each of the plurality of first propulsion coils
With the first conductor
The first insulator covering the first conductor and
The first semi-conductive layer covering the first insulator and
Including
The plurality of first conductors included in each of the plurality of first propulsion coils are electrically connected in series with each other over the plurality of propulsion coil groups.
The plurality of first semi-conductive layers contained 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 semi-conductive layers electrically connected to each other for each propulsion coil group form a semi-conductive layer group for each propulsion coil group.
The semi-conductive layer group is grounded via the first connecting wire for each propulsion coil group.
The ground fault positioning system measures the potential of the semi-conductive layer group or the current flowing through the first connecting line for each propulsion coil group, and based on the measured values, the ground fault causes the ground fault. Position the ground fault position when it occurs ,
Among the plurality of propulsion coil groups, the propulsion coil group arranged on the side closest to the power supply unit that supplies electric power to the propulsion coil device is designated as the first end propulsion coil group.
When the propulsion coil group arranged on the side farthest from the power supply unit among the plurality of propulsion coil groups is designated as the second end propulsion coil group.
A ground fault position determination system in which the number of the first propulsion coils possessed by the second end propulsion coil group is larger than the number of the first propulsion coils possessed by the first end propulsion coil group. In the ground fault positioning system according to claim 11,
Each of the plurality of propulsion coil groups has a plurality of the first propulsion coils and a plurality of second propulsion coils arranged alternately along the track.
Each of the plurality of second propulsion coils
With the second conductor
A second insulator covering the second conductor and
The second semi-conductive layer covering the second insulator and
Including
The plurality of second conductors included in each of the plurality of second propulsion coils are electrically connected in series with each other over the plurality of propulsion coil groups.
The plurality of first semi-conductive layers included in each of the plurality of first propulsion coils and the plurality of second semi-conductive layers included in each of the plurality of second propulsion coils are the propulsion coils. Each group is electrically connected to each other
A ground fault in which the semi-conductive layer group is formed for each propulsion coil group by the plurality of first semi-conductive layers and the plurality of second semi-conductive layers electrically connected to each other for each propulsion coil group. Positioning system. In a ground fault position positioning system that determines the 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 includes 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 and a plurality of second propulsion coils arranged alternately along the track.
Each of the plurality of first propulsion coils
With the first conductor
The first insulator covering the first conductor and
The first semi-conductive layer covering the first insulator and
Including
Each of the plurality of second propulsion coils
With the second conductor
A second insulator covering the second conductor and
The second semi-conductive layer covering the second insulator and
Including
The plurality of first conductors included in each of the plurality of first propulsion coils are electrically connected in series with each other over the plurality of propulsion coil groups.
The plurality of second conductors included in each of the plurality of second propulsion coils are electrically connected in series with each other over the plurality of propulsion coil groups.
The plurality of first semi-conductive layers included in each of the plurality of first propulsion coils and the plurality of second semi-conductive layers included in each of the plurality of second propulsion coils are the propulsion coils. Each group is electrically connected to each other
The plurality of first semi-conductive layers and the plurality of second semi- conductive layers electrically connected to each other for each propulsion coil group form a semi-conductive layer group for each propulsion coil group.
The semi-conductive layer group is grounded via the first connecting wire for each propulsion coil group.
The ground fault positioning system measures the potential of the semi-conductive layer group or the current flowing through the first connecting line for each propulsion coil group, and based on the measured values, the ground fault causes the ground fault. A ground fault position positioning system that positions the ground fault position when it occurs. In the ground fault positioning system according to any one of claims 11 to 13.
A measuring unit that measures the potential of the semi-conductive layer group or the current flowing through the first connecting line for each propulsion coil group.
The measured value measured by the measuring unit is compared with the reference value, and when the measured value is equal to or less than the reference value, it is determined that the ground fault has not occurred in the propulsion coil group in which the measured value is measured. A determination unit that determines that a ground fault has occurred in the propulsion coil group in which the measured value is measured when the measured value exceeds the reference value.
By setting the position of the propulsion coil group determined by the determination unit as the ground fault position, the position of the ground fault is defined as the ground fault position when the ground fault occurs.
A ground fault positioning system that has. In the ground fault positioning system according to any one of claims 11 to 14,
A ground fault positioning system in which neither of the two semi-conductive groups is electrically connected to each other. In the ground fault positioning system according to any one of claims 11 to 15,
The propulsion coil device includes a grounding wire that extends along the track and is grounded.
The semi-conductive layer group is electrically connected to the grounding wire for each propulsion coil group via the first connecting wire, so that the first connecting wire and the grounding wire are connected to each propulsion coil group. Ground fault positioning system that is grounded through. In a ground fault position positioning system that determines the 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 includes 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 trajectory.
Each of the plurality of first propulsion coils
With the first conductor
The first insulator covering the first conductor and
The first semi-conductive layer covering the first insulator and
Including
The plurality of first conductors included in each of the plurality of first propulsion coils are electrically connected in series with each other over the plurality of propulsion coil groups.
The plurality of first semi-conductive layers contained 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 semi-conductive layers electrically connected to each other for each propulsion coil group form a semi-conductive layer group for each propulsion coil group.
The semi-conductive layer group formed in the end propulsion coil group, which is the propulsion coil group arranged at the first end on the first side of the first arrangement formed by the plurality of propulsion coil groups. The end semi-conductive layer group is grounded to the grounding point via the first connecting wire.
The propulsion coil device further includes a plurality of second connecting lines for electrically connecting each of the plurality of semi-conductive layer groups formed in each of the plurality of propulsion coil groups.
The ground fault positioning system measures the current flowing through each of the first connection line and the plurality of second connection lines, and based on the measured measured values, the ground fault when the ground fault occurs. Ground fault position positioning system that positions the position. In the ground fault positioning system according to claim 17,
A measuring unit that measures a first current value flowing through the first connecting line and a plurality of second current values flowing through each of the plurality of second connecting lines.
The first current value measured by the measuring unit is compared with the first reference value, each of the plurality of second current values measured by the measuring unit is compared with the second reference value, and the first current is compared with the second reference value. When the value is equal to or less than the first reference value and all of the plurality of second current values are equal to or less than the second reference value, the ground fault has occurred in any of the plurality of propulsion coil groups. When it is determined that there is no such first current value exceeds the first reference value, or when any of the plurality of second current values exceeds the second reference value, the plurality of propulsion coil groups A determination unit that determines that the ground fault has occurred in any of the above,
Of the first connection line and the plurality of second connection lines, the first connection line whose first current value exceeds the first reference value or whose second current value exceeds the second reference value. Alternatively, when the first connection line or the second connection line which is the second connection line and is arranged on the side farthest from the grounding point is used as the third connection line, the third connection line is used. Is also arranged on the side opposite to the grounding point side, and by setting the position of the propulsion coil group adjacent to the third connecting line as the ground fault position, the ground fault position when the ground fault occurs. And the standardization part that localizes
A ground fault positioning system that has. In the ground fault positioning system according to any one of claims 11 to 18,
The orbit comprises a plurality of structures arranged along the orbit.
The plurality of propulsion coil groups are provided in each of the plurality of structures, respectively, and are ground fault positioning systems. In the ground fault positioning system according to any one of claims 11 to 18,
The orbit comprises a plurality of structures arranged along the orbit.
Each of the plurality of structure groups has a plurality of structures arranged along the orbit.
The plurality of propulsion coil groups are ground fault positioning systems provided in each of the plurality of structure groups.

Images