KR101093030B1 - A fault location estimation technique using fault current ratio flowing catenary of the both sides between fault zone in ac feeding system and method - Google Patents

A fault location estimation technique using fault current ratio flowing catenary of the both sides between fault zone in ac feeding system and method Download PDF

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KR101093030B1
KR101093030B1 KR1020100089281A KR20100089281A KR101093030B1 KR 101093030 B1 KR101093030 B1 KR 101093030B1 KR 1020100089281 A KR1020100089281 A KR 1020100089281A KR 20100089281 A KR20100089281 A KR 20100089281A KR 101093030 B1 KR101093030 B1 KR 101093030B1
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South Korea
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fault
current
winding transformer
line
current flowing
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KR1020100089281A
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Korean (ko)
Inventor
김형철
나희승
민명환
박영
정호성
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한국철도기술연구원
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/10Measuring sum, difference or ratio
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08Locating faults in cables, transmission lines, or networks
    • G01R31/081Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/083Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground

Abstract

The present invention relates to a fault point expression system and a method using a fault current ratio flowing in a catenary at both ends of a fault section in an AC feed system, wherein the electric current of the catenary is measured in real time, when an accident occurs in which the catenary is shorted over the rail, A fault current measuring module for generating fault current information by measuring fault currents of a catenary flowing through two loops formed at transformers at both sides adjacent to the two lines; A current ratio measuring module configured to generate fault current current ratio information by receiving fault current information from the fault current measuring module and calculating a current ratio of the fault current of the vehicle line; And the fault current current ratio information is received from the current ratio measuring module, using the current ratios of the positions of the two points between the single winding transformers and the two points between the single winding transformers and the current of the train. , Current ratio (
Figure 112010059199525-pat00125
) And the point of failure (
Figure 112010059199525-pat00126
It includes; fault point expression module for deriving a relationship between the expression point.
According to the present invention as described above, it is possible to utilize the protection relay installed for the protection of the existing power supply system for the expression of the fault point of the AC electric railway, it is possible to interwork with the existing protection relay as well as additional facilities for the fault point expression By reducing the cost and expressing the fault point by using the current ratio of the tram lines flowing through both ends of the fault section, all fault currents flow to the fault point when a fault occurs. Network, etc.) is not affected.

Description

Fault point expression system and method using fault current ratio flowing through the tram line at both ends of breakdown section in AC feed system

The present invention relates to a fault point expression system and a method using a fault current ratio flowing in a tram line at both ends of a fault section in an AC feed system, and more particularly, to protect a feed system when a fault occurs in an AC power supply of an electric railway. The present invention relates to a technology for more accurately predicting a fault location by determining a fault section by using a current measured through an existing protective relay, and also calculating a current ratio of a flowing catenary at both ends.

In general, when a fault occurs between a vehicle line and a rail in a single-circuit transformer (AT) feed circuit, the fault current drawn up to the AT neutral point on both sides of the fault point is the distance from each AT to the fault point, as shown in FIG. Almost inversely proportional to

The absorption current ratio shown in FIG.

Figure 112010059199525-pat00001
ego,
Figure 112010059199525-pat00002
Is in a linear relationship, and satisfies Equation 1 below.

[Equation 1]

Figure 112010059199525-pat00003

Where [Equation 1]

Figure 112010059199525-pat00004
Is the distance from the origin to the point of failure, in kilometers,
Figure 112010059199525-pat00005
Is the distance (km) of the nth AT from the origin,
Figure 112010059199525-pat00006
Is
Figure 112010059199525-pat00007
and
Figure 112010059199525-pat00008
Distance between
Figure 112010059199525-pat00009
Is
Figure 112010059199525-pat00010
The distance from to the fault point.

When a failure occurs in such a power supply circuit, all AT absorption currents of the line are automatically measured and maintained by a separate measuring device, and the data is sent to the power supply control center using a separate communication device. Using a separate analysis device in the power supply control center to calculate the distance (km) of the failure point according to [Equation 1].

That is, as shown in FIG. 2, the conventional AT absorption current ratio method is configured to measure the current ratio through a separate measuring instrument at the AT neutral point, and compare the ratios to express a failure point.

However, the AT point current fault type fault point determination method does not work with the existing protection relay, so it requires an additional additional measurement device, communication device, and analysis device. There is a problem of cost.

In addition, the fault point determination of the AT absorption current ratio method is a problem in that the relationship between the current ratio and the distance is nonlinear in some sections due to other line suction phenomena in a system such as a double-wire system and a common ground network. have.

In addition, since the AT power supply circuit has a complicated configuration, the wicking current ratio is obtained by combining the wicking currents of the upper and lower ATs. Therefore, the fault line determination of the up and down line has a problem that can not be determined by comparing the magnitude of the wicking current of the up and down AT.

In addition, in the AT absorption current ratio method, when the catenary wire (T) -feed line (F) short-circuit occurs, the current drawn to the AT neutral point does not occur and thus there is a disadvantage in that the failure point is not expressed.

An object of the present invention is to determine the failure section by using the current measured through the existing protective relay to protect the power supply system in case of failure in AC power supply of the electric railway, and also the current ratio of the flowing electric cable lines at both ends The purpose is to predict the failure location more accurately by calculating.

In addition, an object of the present invention is to provide a new point of failure expression system that can minimize the additional cost for estimating the fault location by using a protective relay installed to protect the existing power supply system.

In the AC power supply system of the present invention for achieving the above technical problem, the fault point expression system using the fault current ratio flowing in the catenary lines at both ends of the fault section measures the electric current flowing in the catenary line in real time, but the catenary T is the rail (R). A fault current measurement module for generating fault current information by measuring fault currents of a catenary T flowing through two system loops formed at transformers on both sides adjacent to a fault point at both ends when a short circuit occurs; A current ratio measuring module configured to generate fault current current ratio information by receiving fault current information from the fault current measuring module and calculating a current ratio with respect to the fault current of the catenary T; And receiving fault current current ratio information from the current ratio measuring module, using the positions of two points between the single winding transformers and the currents of the two points between the single winding transformers and the current of the train. Current ratio

Figure 112010059199525-pat00011
) And the point of failure (
Figure 112010059199525-pat00012
It includes; fault point expression module for deriving a relationship between the expression point.

In addition, the fault point expression method using the fault current ratio flowing in the tram line at both ends of the fault section in the trans-flow feed system of the present invention based on the above system, the fault current measurement module measures the current of the tram line in real time, In the event of an accident in which (T) is shorted over the rail (R), generating fault current information by measuring the fault current of the catenary T flowing through two loops formed at both transformers adjacent to the fault point. ; (B) generating a fault current current ratio information by receiving the fault current information from the fault current measuring module, calculating a current ratio with respect to the fault current of the catenary T; And the fault point expression module receives fault current current ratio information from the current ratio measuring module, the position of two points between the single winding transformers (AT) and the current ratios and the rails of the two points between the single winding transformers (AT). By using the current of

Figure 112010059199525-pat00013
) And the point of failure (
Figure 112010059199525-pat00014
And (c) expressing a failure point by deriving a relationship of a).

According to the present invention as described above, it is possible to utilize the protection relay installed for the protection of the existing power supply system for the expression of the fault point of the AC electric railway, it is possible to interwork with the existing protection relay as well as additional facilities for the fault point expression The cost can be reduced, and the fault current ratio and the fault distance are linear regardless of various fault conditions. Therefore, the fault distance can be more accurately determined.

In addition, by expressing the fault point by using the current ratio of the tram line T flowing at both ends of the fault section, when the fault occurs, all fault currents flow to the fault point, and thus, other fault elements and system configuration situations (such as a double wire and a common ground network). ) Is not affected.

In addition, the present invention is capable of distinguishing the up and down line failure, there is also an advantage that can determine the fault location by distinguishing the short circuit accident of the tram line (T) and the feed line (F), the accident of the feed line (F) and the rail (R).

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view for explaining the principle of the expression distance of the AT absorption current ratio method.
2 is a view for explaining a conventional AT absorption current ratio method.
Figure 3 is a block diagram showing a fault point expression system using a fault current ratio flowing in the tram line at both ends of the fault section in the AC power supply system according to the present invention.
4 is a schematic diagram illustrating measurement current measurement in a catenary current ratio method of a fault point expression system using a fault current ratio flowing in a catenary at both ends of a fault section in an AC feed system according to the present invention.
5 is a schematic diagram illustrating a catenary current ratio method of a fault point expression system using a fault current ratio flowing in a catenary at both ends of a fault section in an AC feed system according to the present invention;
6 is a graph showing a fault location and a catenary current ratio according to a fault point expression system using a fault current ratio flowing in a catenary at both ends of a fault section in the AC feed system of the present invention.
FIG. 7 is a system diagram illustrating a loop for expressing a fault point by measuring a current of a feed line when a feeder-car line accident of a fault point expression system using a fault current ratio flowing in a train line at both ends of a fault section in the AC feed system according to the present invention. Illustrated diagram.
FIG. 8 is a system diagram illustrating a loop for expressing a fault point by measuring a current of a feed line when a feeder-rail accident of a fault point expression system using a fault current ratio flowing through a train line at both ends of a fault section in the AC feed system according to the present invention. Illustrated diagram.
9 is a block diagram illustrating a method of expression of a fault point using a fault current ratio flowing in the tram line at both ends of the fault section in the AC power supply system according to the present invention.

Specific features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, terms and words used in the present specification and claims are to be interpreted in accordance with the technical idea of the present invention based on the principle that the inventor can properly define the concept of the term in order to explain his invention in the best way. It should be interpreted in terms of meaning and concept. It is to be noted that the detailed description of known functions and constructions related to the present invention is omitted when it is determined that the gist of the present invention may be unnecessarily blurred.

As shown in FIG. 3, the AC power supply system according to the present invention is a block diagram illustrating a fault point expression system using a fault current ratio flowing through a tram line at both ends of a fault section, and FIG. It is a system diagram showing measurement current measurement in the catenary current ratio method of the fault point expression system using the fault current ratio flowing in the catenary lines at both ends of the fault section in the AC feed system.

3 and 4, in the AC power supply system according to the present invention, the fault point expression system S using the fault current ratio flowing through the electric cable lines at both ends of the fault section includes a fault current measuring module 100 and a current ratio measuring module ( 200) and a failure point facial expression module 300 is configured.

In general, there are two parallel feed stations (PP) and one sub feed section (SP) between substations (SS), and each section has a single auto transformer (AT). Each part is equipped with a protective relay, which monitors the electric current of the train line in real time.

Specifically, the fault current measuring module 100 according to the present invention measures the current flowing out of the transformer in real time, when the accident occurs that the catenary T is shorted over the rail (R), formed in the transformer on both sides adjacent to the accident point Fault current information is generated by measuring the fault current of the catenary T flowing through two loops.

In addition, the current ratio measuring module 200 receives fault current information from the fault current measuring module 100 and calculates a current ratio with respect to the fault current of the catenary T to generate fault current current ratio information.

Referring to FIG. 5, the total current flowing through the catenary T is

Figure 112010059199525-pat00015
and
Figure 112010059199525-pat00016
Sum of
Figure 112010059199525-pat00017
If the distance from the substation to the parallel feeder (PP1) is D, and the distance from the substation to the fault point is d, the ratio of the two distances is the ratio of the total accident current and the current to the right of the fault point as shown in [Equation 2] below. I can express it.

&Quot; (2) "

Figure 112010059199525-pat00018

Further, if the distance between the parallel feed station PP1 and the parallel feed station PP2 is called D1 and the fault point between them is called d1, the current ratio of the fault point can be derived from Equation 3 below.

&Quot; (3) "

Figure 112010059199525-pat00019

And, if the distance between the parallel feed station (PP2) and the auxiliary feed section (SP) is called D2, and the fault point between them is called d2, the current ratio of the fault point can be derived through Equation 4 below. Can be.

&Quot; (4) "

Figure 112010059199525-pat00020

That is, the current ratio measuring module 200 calculates the current ratio for the failure point of the catenary T through the above Equations 2 to 4 to generate fault current current ratio information.

On the other hand, in [Equation 2] to [Equation 4],

Figure 112010059199525-pat00021
Is a current flowing from the single winding transformer AT of the upstream substation SS to the tank line T,
Figure 112010059199525-pat00022
Is a current flowing from the single winding transformer (AT) of the descending substation (SS) to the tank line (T),
Figure 112010059199525-pat00023
Is the current flowing from the single winding transformer AT of the uphill parallel feed station PP1 to the catenary T,
Figure 112010059199525-pat00024
Is the current flowing from the single winding transformer AT of the descending parallel feed station PP1 to the catenary T,
Figure 112010059199525-pat00025
Is the current flowing from the single winding transformer (AT) of the upline parallel feeder (PP2) to the tank line (T),
Figure 112010059199525-pat00026
Is the current flowing from the single winding transformer (AT) of the downline parallel feeder (PP2) to the tank line (T),
Figure 112010059199525-pat00027
Is the current flowing from the single winding transformer (AT) of the upstream auxiliary feed section (SP) to the tank line (T),
Figure 112010059199525-pat00028
Is a current flowing from the single winding transformer AT of the downline auxiliary feed section SP to the tank line T.

Also,

Figure 112010059199525-pat00029
Is a current flowing from the single winding transformer AT of the upstream substation SS to the feed line F,
Figure 112010059199525-pat00030
Is a current flowing from the single winding transformer (AT) of the downline substation (SS) to the feed line (F),
Figure 112010059199525-pat00031
Is the current flowing from the single winding transformer AT of the upward parallel feeder PP1 to the feeder line F,
Figure 112010059199525-pat00032
Is the current flowing from the single winding transformer AT of the downline parallel feed station PP1 to the feed line F,
Figure 112010059199525-pat00033
Is the current flowing from the single winding transformer AT of the upward parallel feeder PP2 to the feeder line F,
Figure 112010059199525-pat00034
Is the current flowing from the single winding transformer AT of the descending parallel feed station PP2 to the feed line F,
Figure 112010059199525-pat00035
Is the current flowing from the single winding transformer (AT) of the upstream auxiliary feed section (SP) to the feed line (F),
Figure 112010059199525-pat00036
Denotes a current flowing from the single winding transformer AT of the downline auxiliary feed section SP to the feed line F. FIG.

On the other hand, the fault point expression module 300 receives the fault current current ratio information from the current ratio measuring module 200, the position between the two points between the single winding transformer (AT) and the two between the single winding transformer (AT) By using the current ratio to the point and the current of the train, the current ratio (

Figure 112010059199525-pat00037
) And the point of failure (
Figure 112010059199525-pat00038
) Is expressed as shown in [Equation 5] below to express the fault point.

[Equation 5]

Figure 112010059199525-pat00039

At this time,

Figure 112010059199525-pat00040
Is the failure point,
Figure 112010059199525-pat00041
Is the current ratio,
Figure 112010059199525-pat00042
Is the first point of failure,
Figure 112010059199525-pat00043
Is the second point of failure,
Figure 112010059199525-pat00044
Is the current ratio of the first failure point
Figure 112010059199525-pat00045
ego,
Figure 112010059199525-pat00046
Is the current at the second failure point
Figure 112010059199525-pat00047
to be.

As described above, it is possible to determine the slope of all sections through Equation (5), thereby accurately expressing the point of failure in case of an accident, and to distinguish the up and down lines.

FIG. 6 is a graph illustrating a fault location and a catenary T current ratio according to a fault point expression system using a fault current ratio flowing through a catenary T at both ends of a fault section in the AC feed system of the present invention. As can be seen from the fault section, the linearity between the fault location and the catenary current (T) current ratio is seen.

In addition, the relationship between the current ratio of the tram line T and the feed line F and the failure point is linear even in an accident of the feed line F, the rail R, and the feed line F, and the tram line T, as shown in FIG. 7. In the event of an accident of the feeder line F and the train line T as described above, the current of the tramline T or the feedline F is measured to express a failure point, and the feeder line F-rail R as shown in FIG. ) In case of an accident, the fault point can be expressed by measuring the current of the feed line (F).

In addition, referring to FIG. 9, a failure point expression method using a fault current ratio flowing in a catenary at both ends of a fault section in the AC feed system according to the present invention will be described below.

The fault current measuring module 100 measures the current flowing out of the transformer in real time, and when an accident occurs in which the catenary T is shorted over the rail R, two loops formed in the transformers on both sides adjacent to the accident point flow through both ends. The fault current information is generated by measuring the fault current of the catenary T (S100).

Subsequently, the current ratio measuring module 200 receives fault current information from the fault current measuring module 100, calculates a current ratio for the fault current of the catenary T, and generates fault current current ratio information (S200).

Then, the fault point expression module 300 receives the fault current current ratio information from the current ratio measuring module 200, and uses the position of two points and the current ratio of the two points and the current of the train between the single winding transformers AT. Current ratio (

Figure 112010059199525-pat00048
) And the point of failure (
Figure 112010059199525-pat00049
Derivation of the relationship to express a failure point (S300).

As described above and described with reference to a preferred embodiment for illustrating the technical idea of the present invention, the present invention is not limited to the configuration and operation as shown and described as described above, it is a deviation from the scope of the technical idea It will be understood by those skilled in the art that many modifications and variations can be made to the invention without departing from the scope of the invention. And all such modifications and changes as fall within the scope of the present invention are therefore to be regarded as being within the scope of the present invention.

S: Fault point expression system using fault current ratio flowing in the tram line at both ends of fault section in AC feed system
100: fault current measurement module 200: current ratio measurement module
300: fault expression module

Claims (6)

  1. In the fault expression system using the fault current ratio flowing from the AC power supply system to the tram line at both ends of the fault section,
    Measures the current of a train line in real time, but when an accident occurs in which the train line is shorted on the rail, fault current measurement is generated by measuring fault currents of the train lines flowing through two loops formed at both transformers adjacent to the accident point at both ends. module;
    A current ratio measuring module configured to generate fault current current ratio information by receiving fault current information from the fault current measuring module and calculating a current ratio with respect to a fault current of a catenary; And
    The fault current current ratio information is received from the current ratio measuring module, and the position of two points between the single winding transformers (AT) and the current ratio of the two points between the single winding transformers (AT) and the current of the train are used. Current ratio (
    Figure 112010059199525-pat00050
    ) And the point of failure (
    Figure 112010059199525-pat00051
    Defect point expression system using a fault current ratio flowing in the tram line at both ends of the fault section in the AC power supply system, characterized in that it comprises a;
  2. The method of claim 1,
    The current ratio measuring module,
    The total current flowing through the tank line
    Figure 112010059199525-pat00052
    and
    Figure 112010059199525-pat00053
    Sum of
    Figure 112010059199525-pat00054
    When the distance from the substation to the parallel feeder (PP1) is D, and the distance from the substation to the fault point is d, the ratio to the distance between the two is derived through Equation 2,
    Figure 112010059199525-pat00055
    Is the current flowing from the single winding transformer (AT) of the upstream substation (SS) to the tram line,
    Figure 112010059199525-pat00056
    Is the current flowing from the single winding transformer (AT) of the descending substation (SS) to the catenary,
    Figure 112010059199525-pat00057
    Is the current flowing from the single winding transformer (AT) of the ascending parallel feeder (PP1) to the catenary,
    Figure 112010059199525-pat00058
    Is the current flowing from the single winding transformer (AT) of the descending parallel feed station (PP1) to the catenary,
    Figure 112010059199525-pat00059
    Is the current flowing from the single winding transformer (AT) of the upline parallel feeder (PP2) to the tram line,
    Figure 112010059199525-pat00060
    Is the current flowing from the single winding transformer (AT) of downline parallel feeder (PP2) to the tram line,
    Figure 112010059199525-pat00061
    Is the current flowing from the single winding transformer (AT) of the upstream auxiliary feeder section (SP) to the tram line,
    Figure 112010059199525-pat00062
    Is the current flowing from the single winding transformer (AT) of the downline auxiliary feed section (SP) to the tram line,
    Figure 112010059199525-pat00063
    Is a current flowing from the single winding transformer AT of the upstream substation SS to the feed line F,
    Figure 112010059199525-pat00064
    Is a current flowing from the single winding transformer (AT) of the downline substation (SS) to the feed line (F),
    Figure 112010059199525-pat00065
    Is the current flowing from the single winding transformer AT of the upward parallel feeder PP1 to the feeder line F,
    Figure 112010059199525-pat00066
    Is the current flowing from the single winding transformer AT of the downline parallel feed station PP1 to the feed line F,
    Figure 112010059199525-pat00067
    Is the current flowing from the single winding transformer AT of the upward parallel feeder PP2 to the feeder line F,
    Figure 112010059199525-pat00068
    Is the current flowing from the single winding transformer AT of the descending parallel feed station PP2 to the feed line F,
    Figure 112010059199525-pat00069
    Is the current flowing from the single winding transformer (AT) of the upstream auxiliary feed section (SP) to the feed line (F),
    Figure 112010059199525-pat00070
    Is a current flowing from the single winding transformer (AT) of the down line auxiliary feed section (SP) to the feed line (F), the fault point expression system using the fault current ratio flowing through the tram lines at both ends of the fault section.
    &Quot; (2) "
    Figure 112010059199525-pat00071
  3. The method of claim 1,
    The current ratio measuring module,
    The total current flowing through the tank line
    Figure 112010059199525-pat00072
    and
    Figure 112010059199525-pat00073
    Sum of
    Figure 112010059199525-pat00074
    When the distance between the parallel feed station PP1 and the parallel feed station PP2 is D1 and the fault point between the parallel feed station PP1 and the parallel feed station PP2 is d1, the ratio of the distance between the two Derived through equation [3],
    Figure 112010059199525-pat00075
    Is the current flowing from the single winding transformer (AT) of the upstream substation (SS) to the tram line,
    Figure 112010059199525-pat00076
    Is the current flowing from the single winding transformer (AT) of the descending substation (SS) to the catenary,
    Figure 112010059199525-pat00077
    Is the current flowing from the single winding transformer (AT) of the ascending parallel feeder (PP1) to the catenary,
    Figure 112010059199525-pat00078
    Is the current flowing from the single winding transformer (AT) of the descending parallel feed station (PP1) to the catenary,
    Figure 112010059199525-pat00079
    Is the current flowing from the single winding transformer (AT) of the upline parallel feeder (PP2) to the tram line,
    Figure 112010059199525-pat00080
    Is the current flowing from the single winding transformer (AT) of downline parallel feeder (PP2) to the tram line,
    Figure 112010059199525-pat00081
    Is the current flowing from the single winding transformer (AT) of the upstream auxiliary feeder section (SP) to the tram line,
    Figure 112010059199525-pat00082
    Is the current flowing from the single winding transformer (AT) of the downline auxiliary feed section (SP) to the tram line,
    Figure 112010059199525-pat00083
    Is a current flowing from the single winding transformer AT of the upstream substation SS to the feed line F,
    Figure 112010059199525-pat00084
    Is a current flowing from the single winding transformer (AT) of the downline substation (SS) to the feed line (F),
    Figure 112010059199525-pat00085
    Is the current flowing from the single winding transformer AT of the upward parallel feeder PP1 to the feeder line F,
    Figure 112010059199525-pat00086
    Is the current flowing from the single winding transformer AT of the downline parallel feed station PP1 to the feed line F,
    Figure 112010059199525-pat00087
    Is the current flowing from the single winding transformer AT of the upward parallel feeder PP2 to the feeder line F,
    Figure 112010059199525-pat00088
    Is the current flowing from the single winding transformer AT of the descending parallel feed station PP2 to the feed line F,
    Figure 112010059199525-pat00089
    Is the current flowing from the single winding transformer (AT) of the upstream auxiliary feed section (SP) to the feed line (F),
    Figure 112010059199525-pat00090
    Is a current flowing from the single winding transformer (AT) of the down line auxiliary feed section (SP) to the feed line (F), characterized in that the fault point expression system using the fault current ratio flowing through the tram line at both ends of the fault section.
    &Quot; (3) "
    Figure 112010059199525-pat00091
  4. The method of claim 1,
    The current ratio measuring module,
    The total current flowing through the tank line
    Figure 112010059199525-pat00092
    and
    Figure 112010059199525-pat00093
    Sum of
    Figure 112010059199525-pat00094
    When the distance between the parallel feed station (PP2) and the auxiliary feed section (SP) is D2, and the failure point between the parallel feed station (PP2) and the auxiliary feed section (SP) is d2, To derive the ratio through [Equation 4],
    Figure 112010059199525-pat00095
    Is the current flowing from the single winding transformer (AT) of the upstream substation (SS) to the tram line,
    Figure 112010059199525-pat00096
    Is the current flowing from the single winding transformer (AT) of the descending substation (SS) to the catenary,
    Figure 112010059199525-pat00097
    Is the current flowing from the single winding transformer (AT) of the ascending parallel feeder (PP1) to the catenary,
    Figure 112010059199525-pat00098
    Is the current flowing from the single winding transformer (AT) of the descending parallel feed station (PP1) to the catenary,
    Figure 112010059199525-pat00099
    Is the current flowing from the single winding transformer (AT) of the upline parallel feeder (PP2) to the tram line,
    Figure 112010059199525-pat00100
    Is the current flowing from the single winding transformer (AT) of downline parallel feeder (PP2) to the tram line,
    Figure 112010059199525-pat00101
    Is the current flowing from the single winding transformer (AT) of the upstream auxiliary feeder section (SP) to the tram line,
    Figure 112010059199525-pat00102
    Is the current flowing from the single winding transformer (AT) of the downline auxiliary feed section (SP) to the tram line,
    Figure 112010059199525-pat00103
    Is a current flowing from the single winding transformer AT of the upstream substation SS to the feed line F,
    Figure 112010059199525-pat00104
    Is a current flowing from the single winding transformer (AT) of the downline substation (SS) to the feed line (F),
    Figure 112010059199525-pat00105
    Is the current flowing from the single winding transformer AT of the upward parallel feeder PP1 to the feeder line F,
    Figure 112010059199525-pat00106
    Is the current flowing from the single winding transformer AT of the downline parallel feed station PP1 to the feed line F,
    Figure 112010059199525-pat00107
    Is the current flowing from the single winding transformer AT of the upward parallel feeder PP2 to the feeder line F,
    Figure 112010059199525-pat00108
    Is the current flowing from the single winding transformer AT of the descending parallel feed station PP2 to the feed line F,
    Figure 112010059199525-pat00109
    Is the current flowing from the single winding transformer (AT) of the upstream auxiliary feed section (SP) to the feed line (F),
    Figure 112010059199525-pat00110
    Is a current flowing from the single winding transformer (AT) of the down line auxiliary feed section (SP) to the feed line (F), characterized in that the fault point expression system using the fault current ratio flowing through the tram line at both ends of the fault section.
    [Equation 4]
    Figure 112010059199525-pat00111
  5. The method of claim 1,
    The fault point facial expression module,
    The current ratio (
    Figure 112010059199525-pat00112
    ) And the point of failure (
    Figure 112010059199525-pat00113
    ) To express the breakdown point through [Equation 5],
    Figure 112010059199525-pat00114
    Is the failure point,
    Figure 112010059199525-pat00115
    Is the current ratio,
    Figure 112010059199525-pat00116
    Is the first point of failure,
    Figure 112010059199525-pat00117
    Is the second point of failure,
    Figure 112010059199525-pat00118
    Is the current ratio of the first failure point
    Figure 112010059199525-pat00119
    ego,
    Figure 112010059199525-pat00120
    Is the current ratio of the second failure point
    Figure 112010059199525-pat00121
    In the AC power supply system, characterized in that the fault point expression system using the fault current ratio flowing through the tram line at both ends of the fault section.
    [Equation 5]
    Figure 112010059199525-pat00122
  6. In the fault point expression method using the fault current ratio flowing from the AC power supply system to the tram line at both ends of the fault section,
    (a) The fault current measuring module measures the current of the train line in real time, and in the event of an accident in which the train line is shorted on the rail, the fault current is measured by measuring the fault current of the train line flowing through the two loops formed at both transformers adjacent to the accident point. Generating current information;
    (b) a current ratio measuring module receiving fault current information from the fault current measuring module to calculate a current ratio of a fault current of a catenary to generate fault current current ratio information; And
    (c) The fault point expression module receives fault current current ratio information from the current ratio measuring module, and positions the two points between the single winding transformers and the currents for the two points between the single winding transformers. By using ratio and current of train,
    Figure 112010059199525-pat00123
    ) And the point of failure (
    Figure 112010059199525-pat00124
    Deriving a relationship between the expression of the fault point; The fault point expression method using a fault current ratio flowing in the tram line at both ends of the fault section in the AC power supply system comprising a.
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Publication number Priority date Publication date Assignee Title
CN103116114A (en) * 2013-01-23 2013-05-22 中国南方电网有限责任公司超高压输电公司检修试验中心 Fault location method and system under direct current deicing device earth wire deicing mode
CN104215879A (en) * 2014-08-13 2014-12-17 宁波海创天下信息科技有限公司 Method and system for locating short-circuit faults of power distribution networks
KR101628971B1 (en) * 2015-12-31 2016-06-13 한국철도공사 System and method for fault localization of protection relay with time synchronization in ac railway system
KR101653954B1 (en) * 2015-03-18 2016-09-06 한국철도공사 System and method for fault localization using current of trolly-feeder in at feeding system
KR101793712B1 (en) * 2016-01-08 2017-11-03 한국철도공사 Failure Analysis Method using Booster Current of Electric Vehicle Load
ES2699998A1 (en) * 2018-05-04 2019-02-13 Univ Madrid Politecnica SYSTEM AND METHOD OF LOCALIZATION OF LAND FAULTS IN ELECTRIC POWER SUPPLY LINES BIPHYSICAL RAILWAYS (Machine-translation by Google Translate, not legally binding)

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JP2003072431A (en) 2001-08-30 2003-03-12 Central Japan Railway Co Feeder circuit failure spotting device
JP2007076608A (en) 2005-09-16 2007-03-29 Jr Soken Denki System:Kk Failure detecting device of failure point standardizing device for alternating current at feeding circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003072431A (en) 2001-08-30 2003-03-12 Central Japan Railway Co Feeder circuit failure spotting device
JP2007076608A (en) 2005-09-16 2007-03-29 Jr Soken Denki System:Kk Failure detecting device of failure point standardizing device for alternating current at feeding circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103116114A (en) * 2013-01-23 2013-05-22 中国南方电网有限责任公司超高压输电公司检修试验中心 Fault location method and system under direct current deicing device earth wire deicing mode
CN104215879A (en) * 2014-08-13 2014-12-17 宁波海创天下信息科技有限公司 Method and system for locating short-circuit faults of power distribution networks
KR101653954B1 (en) * 2015-03-18 2016-09-06 한국철도공사 System and method for fault localization using current of trolly-feeder in at feeding system
KR101628971B1 (en) * 2015-12-31 2016-06-13 한국철도공사 System and method for fault localization of protection relay with time synchronization in ac railway system
KR101793712B1 (en) * 2016-01-08 2017-11-03 한국철도공사 Failure Analysis Method using Booster Current of Electric Vehicle Load
ES2699998A1 (en) * 2018-05-04 2019-02-13 Univ Madrid Politecnica SYSTEM AND METHOD OF LOCALIZATION OF LAND FAULTS IN ELECTRIC POWER SUPPLY LINES BIPHYSICAL RAILWAYS (Machine-translation by Google Translate, not legally binding)

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