• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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    • 专利摘要:
    System for the detection of cuts in negative conductor cables and leakage currents in electrical installations. The present invention describes a system for the detection of cuts in negative lead wires and leakage currents in negative lead wires (8) in electrical installations of a rail transport network (7). Specifically, this system comprises: at least one current transducer (3) intended to be installed in at least one of the negative lead wires (8) of the negative well of the electrical installation, wherein said current transducer (3) it is linked to a control unit (4) which in turn is linked to an alert unit (5). So that when a cut or a leakage current occurs, said negative conductor cable (8) is detected and notified to an operator. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2680394A1
    申请号:ES201730237
    申请日:2017-02-23
    公开日:2018-09-06
    发明作者:Juan Antonio MARTÍN AMAYA；Diego Manuel RODRÍGUEZ TABERNERO；Luciano AVENDAÑO LAGO；José María TESO ALONSO；Jesús MARTÍN LEÓN；Félix GARCÍA NUÑEZ；José Luis CARRERO GARCÍA；Azucena CONCEJO LISTE
    申请人:Administrador de Infraestructuras Ferroviarias ADIF；
    IPC主号:
    专利说明:

    SYSTEM FOR THE DETECTION OF CUTS IN CABLES CONDUCTORS OF NEGATIVE AND CURRENTS OF LEAK IN ELECTRICAL INSTALLATIONS
    D E S C R I P C I Ó N
    5
    OBJECT OF THE INVENTION
    The object of the present invention is a system for the detection of cuts in negative conductor cables and leakage currents in electrical installations of a railway transport network, including train networks, high-speed train networks, metro networks, tram or trolleybus networks.
    Alternatively, this system could be applied to any electrical installation where it is necessary to monitor cuts and leakage currents of energized cables from the same AC and DC generator, and therefore even from a group of batteries.
    BACKGROUND OF THE INVENTION
    Typically, the electrical, or electrification, installations of the rail transport networks 20 electrically feed the engine of the trains running on the tracks. These electrical installations comprise a plurality of electrical substations along the path that transform and rectify the electric current from the general supply network and produced by the supplying companies. Each electrical substation comprises at least one power supply cable, or feeder, intended to inject electricity to power the electric motor and at least one negative cable intended to return the electricity to the electrical substation.
    Currently, electrical installations have problems related to the cuts of negative conductor cables, also known as lane return cables. 30 The negative conductor cable may be composed of more than one negative conductor cable and therefore the section of the latter for the electrical substation is the sum of the section of all the negative conductor cables of the same electrical substation.
    Usually, these cuts in the negative wires are mainly caused by
    maintenance of the train tracks, and for the theft of these negative conductor cables.
    This cutting of the negative conductor cables can cause, among others, the following 5 effects: load imbalance, heating of the negative conductor cables, leakage currents, deterioration of the inductive joints and economic cost overruns in the consumption charge of the adjacent electrical substations in electrical installations.
    10 More specifically, load imbalances are caused by the decrease in the section of the negative conductor cable, this produces an imbalance of loads between the electrical substations of the electrical installations that feed the rail transport network. This causes that the affected electrical substation does not contribute the necessary electrical load to the train and the collateral substation assumes that imbalance, 15 exceeding the contracted power of the installation. This implies a higher economic cost and an overexploitation of the installation, which can lead to breakdowns in the electrical installation itself.
    The heating of the cables is caused by the reduction of the section of the returns, 20 that is to say this produces the heating of the negative conductive cables, being able to give rise to fires in the zones next to the train track. As well as the fatigue in the materials that when losing the mechanical properties causes the rupture of the negative conductive cables.
    25 On the other hand, the ground return of electrified systems in direct current is responsible for leakage currents. Leakage currents depend on the degree of insulation of the infrastructure with respect to ground, and the section of the negative conductor cable. Therefore, a decrease in the section of the cable, leads to this type of leakage currents that penetrate the facilities through pipes, or 30 metal structures, and that in contact with the ground can cause electrolytic corrosion that degrades the Metallic structures of the viaducts and that can cause leaks of liquids in underground conduits, explosion of gases and damages in electrical or telecommunications installations outside the railway line. Additionally, these leakage currents can generate a potential difference that
    It can be dangerous for people and electromagnetic interference that can affect nearby electronic installations.
    Additionally, the total lack of negative conductor cables causes, in 5 normal conditions of railway traffic, the return of current to return through the signaling lane. Consequently, inductive joints, prepared to withstand limited intensity passage (around 1000 A), suffer deterioration due to over-intensity passage, causing blockage and failure of track signaling circuits.
    10 Finally, when a negative conductor cable cut occurs, an imbalance of the loads between substations results. What causes the electrical substation where the incident has occurred does not inject the electrical intensity for which it has been designed, reducing its performance. While the nearby electrical substations are distributed the charges of this, causing the power sections 15 contracted with the suppliers to overflow. Which would generate three effects: overexploitation of the facilities, with the possibility of unnecessary breakdowns and delays in traffic, incensory economic expenses for charging and repair costs of the facilities.
    20 In spite of all these negative effects that the cuts and leakage currents can cause in negative conductor cables, their prevention method is a visual inspection one by one of said cables. This results in a slow method, which requires planning and high personnel costs to inspect all electrical installations of the rail transport network. As a result, in the majority of cases, these cuts are not detected or prevented in time.
    Currently, in order to try to detect these cuts in the electrical substations, the lack of the negative conductor cables is detected when the negative ground levels previously parameterized in the system are exceeded, which causes the total disconnection of the electrical substation, leaving it out of order when a large number of cables have been disconnected.
    Currently, these systems are unable to perform a constant check and signaling of the status and number of negative lead wires connected to the
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    electrical substation, but only establishes a maximum return intensity value from which the electrical substation is disconnected, so that these cuts are neither detected nor prevented in time.
    DESCRIPTION OF THE INVENTION
    The present invention is a system for the detection of cuts in negative conductor cables and leakage currents in electrical installations with a plurality of electrical substations of a railway transport network, such as a direct current train network, a train network High speed alternating current, or a subway network.
    Specifically, this system includes:
    • a first intensity transducer, intended to be linked to at least one of the negative conductor cables of at least one of the substations, usually installed its negative well, to measure the return intensity,
    • a feeder transducer, intended to be linked with at least one positive feeder of the electrical substation, to measure the intensity consumed by the positive feeder, ie the intensity injected by the electrical substation to the transport network,
    • a ground transducer, intended to be linked to the ground plate in the negative well of the electrical substation, to measure the intensity provided by an external power supply,
    • an alert unit comprising a screen and / or a speaker to generate a visual or audible alarm,
    • at least one control unit comprising:
    or a first means of communication intended to establish communication with the current transducer, with the feeder transducer and with the ground transducer,
    or a memory which in turn comprises instructions for detecting cuts and leakage currents,
    or a second means of communication intended to establish a
    communication with the alert unit,
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    or a microprocessor linked with memory, with the first means of communication, and with the second means of communication to detect cuts and leakage currents in negative conductor cables by executing the instructions for detecting cuts and leakage currents of the memory, and notify it, through the second means of communication, to the alert unit so that it can notify an operator by means of the visual or audible alarm.
    Preferably, the feeder transducer comprises a hall effect sensor linked to a first analog / digital signal converter.
    Preferably, the intensity transducer comprises a hall effect sensor linked to a second analog / digital signal converter.
    Preferably, the ground transducer comprises a hall effect sensor linked to a third analog / digital signal converter.
    More specifically, this earth translator is linked on the ground plate to measure the intensities that may come from outside due to high voltage lines outside the electrical substation or due to lack of isolation of the train tracks. These intensities would be considered as leakage currents from external power supplies and would not be measured by the current transducer since they are not conducted by the negative lead wires.
    Preferably, the system comprises a plurality of current transducers intended to be linked with a plurality of negative conductor cables of the electrical substation.
    Additionally, the control unit comprises a first comparator of the control unit by means of the instructions for detecting cuts and leakage currents included in the memory, compares the intensity measurements of each of the intensity transducers with each other, and this It allows you to detect the cutting of negative conductor cables in a precise way without having to use high sensitivity transducers.
    Additionally, this comparison allows to determine if there is an imbalance of the charges between the electrical substations adjacent to the electrical substation where the system is installed.
    5
    More specifically, the instructions for detecting cuts and leakage currents comprise a modifiable intensity parameter, by an operator through the alert unit, which relates the number of negative conductor cables for each intensity transducer. Additionally, these instructions for detecting cuts and 10 leakage currents allow to accurately detect the number of negative conductor cables that have a cut, without the need to have an intensity transducer for each negative conductor cable.
    To determine the modifiable intensity parameter that detects the lack of negative conductor cables, the number of negative conductor cables to be verified in the electrical substation is taken into account. For this, the number of current transducers required is determined based on the number of negative conductor cables to be monitored.
    20 Alternatively, the control unit comprises a second comparator which, by means of the instructions for detecting cuts and leakage currents included in the memory, compares the measurement of the intensity transducer with the measurement of the feeder transducer to detect leakage currents from sources of External power supply to the transport network in an alternative way to the ground translator.
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    Preferably, the control unit comprises a third comparator which, by means of the instructions for detecting cuts and leakage currents included in the memory, compares the measurement of the intensity transducer with the measurement of the feeder transducer to detect leakage currents in the network of transport, so that the third comparator detects leakage current when the current measured by the feeder transducer is greater than the current measured by the return current transducer. Note that if there is more than one current or feeder transducer, the measurements of these are added respectively, before making the comparison.
    Additionally, the control unit comprises an intensity monitoring circuit which, by means of the instructions for detecting cuts and leakage currents included in the memory, monitors the intensity measured by the ground transducer, to establish the leakage current of the substation electric Preferably, the control unit comprises an alarm generating circuit for generating the visual or audible alarm when the leakage current is greater than 300A and reproduces it through the alert unit.
    Additionally, the alarm generator circuit is configured to generate a disconnection alarm when the leakage current is greater than 650A and reproduce it through the alert unit (5) so that the operator disconnects the electrical substation.
    Preferably, the installation comprises a plurality of intensity transducers 15 comprising the first intensity transducer and a second intensity transducer intended to be linked with a plurality of negative conductor cables, so that the first intensity transducer is linked with a Single negative conductor cable and the second intensity transducer is linked with up to 3 negative conductor cables.
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    Preferably, the installation comprises a plurality of intensity transducers comprising the first intensity transducer, the second intensity transducer and a third intensity transducer intended to be linked with a plurality of negative conductor cables, so that the first transducer of 25 intensity is linked with a single negative conductor cable, the second intensity transducer is linked with up to 2 negative conductor cables and the third intensity transducer is linked with from 3 to 5 negative conductor cables, depending on the electrical substation.
    Preferably, the installation comprises a plurality of intensity transducers comprising the first intensity transducer, the second intensity transducer, the third intensity transducer and a fourth intensity transducer intended to be linked with a plurality of negative conductor cables, so that the first intensity transducer is linked with a single cable
    Negative conductor, the second intensity transducer is linked with up to 2 negative conductor cables, the third intensity transducer is linked with up to 3 negative conductor cables, the fourth intensity transducer is linked with 4 to 5 negative conductor cables , depending on the 5 electrical substation.
    Preferably, the installation comprises a plurality of intensity transducers comprising the first intensity transducer, the second intensity transducer, the third intensity transducer, the fourth intensity transducer and a fifth intensity transducer intended to be linked with a plurality of negative conductor cables, so that the first intensity transducer is linked with a single negative conductor cable, the second intensity transducer is linked with up to 2 negative conductor cables, the third intensity transducer is linked with up to 3 cables Negative conductors, the fourth 15 current transducer is linked with up to 4 negative conductor cables and the fifth intensity transducer is linked with up to 5 negative conductor cables.
    Preferably, the display of the alert unit is a touch screen that allows the operator to modify and interact with the control unit to access the memory and modify the intensity parameters, classify the alarms, perform diagnostics of the electrical installation and obtain information, for example live, of the measurements of the different intensity, feeder and ground transducers.
    In this way, a system is obtained that reduces the times in the review of the 25 connections of the negative conductor cables for the maintenance personnel of the rail transport network, without it being necessary to periodically move the maintenance personnel to carry them out. preventive maintenance tasks.
    Additionally, this system when detecting the cut before the complete lack of return intensity 30 in the electrical installation which allows to avoid the extra costs derived from exceeding the contracted power, as well as reducing the delay times that can occur in the circulation of the trains for lack of contribution load on the line. It also allows constant verification of the status of negative drivers against theft.
    DESCRIPTION OF THE DRAWINGS
    To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical realization thereof, a set of said description is attached as an integral part of said description. Drawings where, for illustrative and non-limiting purposes, the following has been represented:
    10 Figure 1.- Shows a schematic view of the system installed in the railway network. PREFERRED EMBODIMENT OF THE INVENTION
    In a preferred embodiment of the invention, as shown in Figure 1, the system (1) comprises a plurality of current transducers (3), a feeder transducer (2), a ground transducer (10) , a control unit (4) and an alert unit (5).
    The intensity transducers (3) are hall effect sensors linked with a first analog / digital signal converter installed in the negative well of an electrical substation (6) of the rail transport network (7). Specifically, each hall effect sensor is linked to its group of negative conductor cables (8) present in said well configured as established in the control unit (4) of the system (1).
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    Preferably, the feeder transducer (2) comprises a hall effect sensor, linked with a second analog / digital signal converter, intended to be linked with at least one positive feeder (9) of the electrical substation (6), to measure the intensity consumed by the positive feeder (9).
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    Preferably, the ground transducer (10) comprises a hall effect sensor intended to be linked, with a third analog / digital signal converter, with the ground plate (11) in the negative well of the electrical substation (6) , to measure the intensity contributed by any external power supply.
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    Preferably, the electrical substation (6) comprises the following numbers of negative conductor cables (8), not individually represented, the number and position of the current transducers (3) vary as follows:
    • 1 negative conductor cable (8) implies an intensity transducer (3), therefore the verification of the intensity passage through the negative conductor cable (8) that is connected to the rail.
    • 2 negative conductor cables (8) implies two current transducers (3), one for each negative conductor cable (8) with an intensity ratio of 1 to 1.
    • 3 negative conductor cables (8) involves two current transducers (3). One on a negative conductor cable (8) and the other on two negative conductor cables (8), with an intensity ratio of 1 to 2.
    • 4 negative conductor cables (8) involves two current transducers (3). One on a negative conductor cable (8) and the other on three negative conductor cables (8), with an intensity ratio of 1 to 3.
    • 5 negative conductor cables (8) involves three current transducers (3). One on a negative conductor cable (8), another on a negative conductor cable (8) and the third on three negative conductor cables (8) with an intensity ratio of 1 to 1 to 3.
    • 6 negative conductor cables (8) involves three current transducers (3). One on a negative conductor cable (8), another on two negative conductor cables (8) and the third on three negative conductor cables (8), with a ratio of intensities would be 1 to 2 to 3.
    • 7 negative conductor cables (8) involves three current transducers (3). One on a negative conductor cable (8), another on two conductor cables
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    of negative (8) and the third on four negative conductor cables (8), with a ratio of intensities would be 1 to 2 to 4.
    • 8 negative conductors (8) involves three current transducers (3). One on a negative conductor cable (8), another on three negative conductor cables (8) and the third on four negative conductor cables (8), with a ratio of intensities would be 1 to 3 to 4.
    • 9 negative conductor wires (8) involve three current transducers (3). One on a negative conductor cable (8), another on three negative conductor cables (8) and the third on five negative conductor cables (8), with a ratio of intensities would be 1 to 3.
    • 10 negative conductor cables (8) involves four current transducers (3). One on a negative conductor cable (8), another on two negative conductor cables (8), another on three negative cables (8) and the fourth on four negative conductor cables (8), with a ratio of intensities would be 1 to 2 to 3 to 4.
    • 11 negative lead wires (8) involve four current transducers (3). One on a negative conductor cable (8), another on two negative conductor cables (8), another on three negative conductor cables (8) and the fourth on five negative conductor cables (8), with an intensity ratio it would be 1 to 2 to 3 to 5.
    • 12 negative lead wires (8) involves four current transducers (3). One on a negative conductor cable (8), another on two negative conductor cables (8), another on four negative conductor cables (8) and the fourth on five negative conductor cables (8), with a ratio of intensities would be 1 to 2 to 4 to 5.
    • 13 negative conductor cables (8) involves four current transducers (3). One on a negative conductor cable (8), another on three cables
    Negative conductors (8), another over four negative conductive cables (8)
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    and the fourth on five negative conductor cables (8), with an intensity ratio would be 1 to 3 to 4 to 5.
    • 14 negative lead wires (8) involves five current transducers
    5 (3). One on a negative conductor cable (8), another on a conductor cable
    negative (8), another on three negative conductor cables (8), another on four negative conductor cables (8) and the fifth on five negative conductor cables (8), with a ratio of intensities would be 1 to 1 to 3 to 4 to 5.
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    • 15 negative lead wires (8) involve five current transducers (3). One on a negative conductor cable (8), another on two negative conductor cables (8), another on three negative conductor cables (8), another on four negative conductor cables (8) and the fifth on five
    15 negative conductor cables (8), with an intensities ratio would be 1 to
    2 to 3 to 4 to 5.
    This allows to calculate the number of current transducers (3) necessary, depending on the number of negative conductor cables (8) to be verified and thanks to the
    20 intensities ratios are optimized the number of current transducers (3) necessary, being able to determine the lack of up to a negative conductor cable (8). In addition, the system (1) is independent of the material and the section of the negative conductor cables (8).
    Additionally, as the hall effect sensors of the current transducers (3) acquire the intensity measurements of each previously linked negative conductor cable (8) and are easily installed on the negative conductor cable (8), without having to Disconnect these negative lead wires (8) for installation. Thus, the intensity transducers (3) do not affect the normal
    30 operation of return circulations to the electrical substation, avoid risks for personnel working in the installation of the device, and are easily installable.
    The measurements of these intensity transducers (3) reach a first means of
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    communication of the control unit (4) through a data bus that links the current (3) and feeder (2) transducers to the first means of the control unit (4). Additionally, the control unit (4) also receives through this data bus the measurements of the ground transducer (10) that is linked to the ground plate (11) of the electrical substation (6).
    Additionally, the control unit (4) comprises a memory which in turn comprises instructions for detecting cuts and leakage currents, and a microprocessor linked to said memory. This microprocessor through the
    10 measurements of each hall effect sensor and of the instructions for detecting cuts and leakage currents, monitors the status of each of the negative conductor cables (8) and detects whether a cut or leakage current has been generated in any of them. When it detects such a cut or leak, it generates an alarm to notify the operator through the alert unit (5).
    fifteen
    Additionally, thanks to the measurements of the earth transducer (10), the control unit (4) can detect a cut-off or a leakage current produced by a current input from an external power supply.
    20 Additionally, the control unit (4) comprises a second means of communication intended to establish a communication with the alert unit (5) so that it notifies the alerts to the operator that can be found in the electrical substation (6) and / or remotely in a control center.
    Preferably, the control unit (4) is a control PLC, the first means of communication are a first plurality of analog inputs to connect the current transducers (3) to the PLC, a second plurality of analog inputs to connect the transducer feeder (2), and a third plurality of analog inputs to connect the ground transducer (10) to the PLC, the second means of
    Communication is a plurality of digital inputs intended to connect to the alert unit (5). Additionally, the second means of communication can be both wired and wireless and therefore the control unit (4) comprises an Ethernet port and / or a WiFi antenna for connecting said digital inputs with the alert unit (5).
    Preferably, the alert unit (5) comprises a touch screen that allows the operator to interact with the control unit (4) to access the memory and modify the intensity parameters, classify the alarms, perform diagnostics of the electrical installation 5 and Obtain information on transducer measurements (2, 3, 10). Additionally, the alert unit (5) comprises a loudspeaker for reproducing an audible alert signal, while the touch screen can reproduce a visual alarm signal.
    权利要求:
    Claims (11)
    [1]
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    R E I V I N D I C A C I O N E S
    1.- System (1) for the detection of cuts in negative conductor cables (8) and leakage currents in electrical installations with a plurality of electrical substations (6) of a rail transport network (7), where in turn The electrical substations (6) comprise at least one negative cable (8), at least one positive feeder (9) and a negative well with a ground plate, characterized in that the system (1) comprises:
    • a first intensity transducer (3) intended to be linked with at least one of the negative conductor cables (8) of at least one of the electrical substations (6), to measure the return intensity,
    • a feeder transducer (2) intended to be linked with at least one positive feeder (9) of the electrical substation (6), to measure the intensity consumed by the positive feeder (9),
    • a ground transducer (10) intended to be linked to the ground plate (11) of the negative well of the electrical substation (6), to measure the intensity provided by any external power supply,
    • an alert unit (5) comprising a screen and / or a speaker to generate a visual or audible alarm,
    • at least one control unit (4) comprising:
    or a first means of communication intended to establish communication with the current transducer, with the feeder transducer
    (2) and with the ground transducer (10),
    or a memory which in turn comprises instructions for detecting cuts and leakage currents,
    or a second means of communication intended to establish communication with the alert unit (5),
    or a microprocessor linked to the memory, with the first means of communication, and with the second means of communication to detect cuts and leakage currents in negative conductor cables (8), by means of the instructions for detecting cuts and leakage currents of the memory, and notify it through the second means of communication to the alert unit (5) so that it can notify an operator by means of the visual or audible alarm.
    [2]
    2. System (1) according to claim 1, characterized in that the feeder transducer
    (2) comprises a hall effect transducer with an analog / digital signal converter.
    5. System (1) according to claim 1, characterized in that the transducer of
    Intensity (3) is a hall effect sensor linked to an analog / digital signal converter.
    [4]
    4. - System (1) according to claim 1, characterized in that the ground transducer
    10 (10) is a hall effect sensor linked to an analog / digital signal converter.
    [5]
    5. - System (1) according to claim 1, characterized in that it comprises a plurality of intensity transducers (3) comprising the first intensity transducer
    (3) and a second intensity transducer (3) intended to be linked with a plurality of negative conductor cables (8), so that the first transducer of
    intensity (3) is linked with a single negative conductor cable (8) and the second intensity transducer (3) is linked with up to 3 negative conductor cables (8).
    6. System (1) according to claim 5, characterized in that it comprises a plurality
    of intensity transducers (3) comprising the first intensity transducer (3), the second intensity transducer (3) and a third intensity transducer (3) intended to be linked with a plurality of negative conductor cables (8) , so that the first intensity transducer (3) is linked with a single negative conductor cable (8), the second intensity transducer (3) is linked with up to 2 negative conductor cables (8) and the third transducer Current (3) is linked with up to 5 negative lead wires (8).
    [7]
    7. System (1) according to claim 6, characterized in that it comprises a plurality 30 of intensity transducers (3) comprising the first intensity transducer (3), the second intensity transducer (3), the third transducer of intensity (3) and a fourth intensity transducer (3) intended to be linked with a plurality of negative conductor cables (8), so that the first intensity transducer (3) is linked with a single negative conductor cable ( 8), the second transducer of
    intensity (3) is linked with up to 2 negative conductor cables (8), the third intensity transducer (3) is linked with up to 3 negative conductor cables (8), the fourth intensity transducer (3) is linked with up to 5 negative conductor cables (8).
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    [8]
    8. - System (1) according to claim 7, characterized in that it comprises a plurality of intensity transducers (3) comprising the first intensity transducer
    (3), the second intensity transducer (3), the third intensity transducer (3), the fourth intensity transducer (3) and a fifth intensity transducer (3) intended
    10 to be linked with a plurality of negative conductor cables (8), so that the first intensity transducer (3) is linked with a single negative conductor cable (8), the second intensity transducer (3) is linked with up to 2 negative conductor cables (8), the third intensity transducer (3) is linked with up to 3 negative conductor cables (8), the fourth intensity transducer (3) is linked with up to 4 negative conductor cables (8) and the fifth intensity transducer (3) is linked with up to 5 negative conductor cables (8).
    [9]
    9. - System (1) according to any one of claims 5 to 8, characterized in that the control unit (4) comprises a first comparator for, by means of the instructions
    20 for detecting cuts and leakage currents included in the memory, compare the measurements of each of the current transducers (3) to detect the cut of any one of the negative conductor cables (8).
    [10]
    10. - System (1) according to claim 1, characterized in that the control unit (4) 25 comprises a second comparator for, by means of the detection instructions of
    cuts and leakage currents included in the memory, compare the measurement of the current transducer (3) with the measurement of the feeder transducer (2) to detect external leakage currents in the transport network.
    11. System (1) according to claim 10, characterized in that the control unit
    (4) comprises an intensity monitoring circuit for, by means of the instructions for detecting cuts and leakage currents included in the memory, monitoring the intensity measured by the ground transducer (10) and establishing the leakage current of the substation electric (6); and comprises a generator circuit of
    alarms to generate the visual or audible alarm when the leakage current is greater than 300A and reproduce it through the alert unit (5).
    [12]
    12. - System (1) according to claim 11, characterized in that the 5 alarm generator circuit is configured to generate a disconnection alarm when the current
    Leakage is greater than 650A and reproduce it through the warning unit (5) so that the operator disconnects the electrical substation.
    [13]
    13. - System (1) according to claim 1, characterized in that the control unit (4), 10 comprises a third comparator for, by means of the cutting detection instructions
    and of leakage currents included in the memory, compare the measurement of the intensity transducer (3) with the measurement of the feeder transducer (2), to detect leakage currents in the transport network so that the third comparator detects a current Leakage when the current measured by the feeder transducer (2) is greater than the current measured by the return current transducer (3).
    [14]
    14. - System (1) according to claim 1, characterized in that the alert unit (5) comprises a touch screen that allows the operator to interact with the control unit (4) to access the memory and modify an intensity parameters for him
    20 intensity transducer, classify alarms, perform diagnostics of the electrical installation and obtain information on the measurements of current transducers (3), feeder transducers (2) and ground transducers (10).
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    同族专利:
    公开号 | 公开日
    WO2018154170A1|2018-08-30|
    ES2680394B1|2019-06-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4117463A|1976-07-28|1978-09-26|Westinghouse Brake & Signal Co. Ltd.|Circuit fault detection apparatus for railroad track circuit redundant connections|
    KR100582214B1|2004-06-03|2006-05-23|한국철도기술연구원|The directional and differential ground fault protective relaying scheme in ungrounded DC traction power supply system and the current limiting device for the ground fault current detection|
    US8836526B2|2009-12-29|2014-09-16|Harald Ruediger|Monitoring device for de-energized catenary systems or overhead lines|
    ITTO20121119A1|2012-12-20|2014-06-21|Ansaldo Sts Spa|MODULAR ELECTRIC POWER SUPPLY LINE ISOLATED AUTO|EP3819162A1|2019-11-11|2021-05-12|Rail Power Systems GmbH|Traction energy supply system and method for monitoring the integrity of at least one conductor of a return line for the traction energy|
    CN112557831B|2021-02-24|2021-05-28|中国铁路设计集团有限公司|Direct power supply type traction network fault location method with reinforcing wire|
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    ES201730237A|ES2680394B1|2017-02-23|2017-02-23|SYSTEM FOR THE DETECTION OF CUTS IN NEGATIVE CONDUCTOR CABLES AND LEAKAGE CURRENTS IN ELECTRICAL INSTALLATIONS|ES201730237A| ES2680394B1|2017-02-23|2017-02-23|SYSTEM FOR THE DETECTION OF CUTS IN NEGATIVE CONDUCTOR CABLES AND LEAKAGE CURRENTS IN ELECTRICAL INSTALLATIONS|
    PCT/ES2018/070138| WO2018154170A1|2017-02-23|2018-02-23|System for detecting outages in negative conductor cables and leakage currents in electrical installations|
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