WO2024023853A1 - Système et procédé de détection d'une connexion défectueuse dans une grille terrestre ou un équipement - Google Patents

Système et procédé de détection d'une connexion défectueuse dans une grille terrestre ou un équipement Download PDF

Info

Publication number
WO2024023853A1
WO2024023853A1 PCT/IN2023/050731 IN2023050731W WO2024023853A1 WO 2024023853 A1 WO2024023853 A1 WO 2024023853A1 IN 2023050731 W IN2023050731 W IN 2023050731W WO 2024023853 A1 WO2024023853 A1 WO 2024023853A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
equipment
riser
grid
input current
Prior art date
Application number
PCT/IN2023/050731
Other languages
English (en)
Inventor
PrashanthBelur GURURAJA RAO
Original Assignee
Jef Techno Solutions Pvt Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jef Techno Solutions Pvt Ltd filed Critical Jef Techno Solutions Pvt Ltd
Publication of WO2024023853A1 publication Critical patent/WO2024023853A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults

Definitions

  • the embodiments herein generally relate to detection of a faulty connection in an earth grid or an equipment, and more particularly, to a system and method for detecting the faulty connections in the earth grid or the equipment using a current injection device and a current measuring device.
  • the existing system gauges a damage in the earth grid (i.e. riser) by measuring an effective resistance between the earth grid and the equipment.
  • the drawback of the existing system is that it is not possible to identify which riser is defective and the riser is defective at the equipment or at the earth grid. Further, it is very important to detect a faulty connection in the system which has only one riser in between the equipment and the earth grid as there are no other riser which are connected to the equipment and the earth grid. If there is a damage/breakage in the single riser system, the chances of accidents and causalities are very high.
  • an embodiment herein provides a system for detecting a faulty connection in an earth grid or an equipment.
  • the system includes an earth grid, a plurality of equipment, a current injection device and a plurality of current measuring devices.
  • the plurality of equipment is connected to the earth grid.
  • the plurality of equipment includes a first equipment and a second equipment.
  • the first equipment is connected to the earth grid through a plurality of first risers.
  • the second equipment is connected to the earth grid through a second riser.
  • the current injection device includes a frequency converter and a current unit.
  • the frequency converter modifies an input current with grid frequency into an input current with off grid frequency.
  • the current unit regulates the input current with off grid frequency into a variable input current with off grid frequency.
  • the first reference riser and the second riser receive a first input current with off-grid frequency from the current injection device and provide the first input current with off-grid frequency to the earth grid for detecting a faulty connection using the second riser that is under test.
  • the second equipment or the body of the second equipment and the second riser receive a second input current with off grid frequency from the current injection device and provide the second input current with off-grid frequency to the second riser under test for detecting a faulty connection in the second equipment or the body of the equipment using the second riser that is under test.
  • the plurality of current measuring devices includes a first current measuring device and a second current measuring device. The first current measuring device is connected to the second riser below the second current injection point and the second current measuring device is connected to the second riser above the second current injection point.
  • the first current measuring device measures a first current that is received by the second riser from the earth grid and the second current measuring device measures a second current that is received by the second riser from the second equipment or the body of the second equipment.
  • the system compares the first current, the second current, the first input current, and the second input current and determines a faulty connection in(i) the second equipment if at least one of (a) the second current that is received by the second riser under test from the body of the second equipment is below the first current that is received by the second riser under test from the earth grid, (b) the second current that is received by the second riser under test from the second equipment is below the second input current that is provided to the body of the second equipment, or (c) the second current that is received by the second riser under test from the body of the second equipment is zero, and (ii) the earth grid if at least one of (a) the first current that is received by the second riser under test from the earth grid is below the second current that is received by the second riser under test
  • the system determines a location of the faulty connection in the second equipment or the body of the second equipment more accurately by (i) changing the third current injection point to a pole structure of the second equipment above a first termination point where the second riser is terminated, (ii) providing the second input current with off-grid frequency at the third current injection point and to the second current injection point, (iii) measuring, using the second current measuring device, the second current that is received by the second riser from the pole structure of the second equipment, and (iv) comparing at least two of the first current, the second current and the second input current to determine a faulty connection in the first termination point.
  • the system determines a location of the faulty connection in the second equipment or the body of the second equipment more accurately by (i) changing (a) the third current injection point to a frame of the second equipment above a second termination point where a pole structure is bonded with the frame and (b) the second current injection point to the pole structure below the second termination point, (ii) providing the second input current with off-grid frequency to (a) the frame of the second equipment and (b) the pole structure which acts a riser under test, (iii) measuring, using the second current measuring device, the second current that is received by the pole structure from the frame of the second equipment, and (iv) comparing at least two ofthe first current, the second current, and the second input current to determine a faulty connection in the second termination point.
  • the system determines a location of the faulty connection in the second equipment or the body of the second equipment more accurately by (i) changing the second current injection point to the frame of the second equipment below a third termination point where the frame is bonded withthe second equipment, (ii) providing the second input current with off-grid frequency to (a) the second equipment and (b) the frame of the second equipment which acts a riser under test, (iii) measuring, using the second current measuring device, the second current that is received by the frame of the second equipment from the second equipment, and (iv) comparing at least two ofthe first current, the second current, and the second input current to determine a faulty connection in the third termination point.
  • the current injection device is electrically connected to the frame of the second equipment or the pole structure of the second equipment at the third current injection point for providing the second input current with off-grid frequency.
  • the first input current or the second input current ranges from 1 ampere to 20 amperes. In some embodiments, the first input current or the second input current ranges from 1 ampere to 40 amperes. In some embodiments, the first input current or the second input current comprise an alternate current (AC) or a direct current (DC). In some embodiments, the first reference riser is a conductor that connects the current injection device and the earth grid.
  • the first reference riser is a node taken from the earth grid to provide the first input current from the current injection device to the earth grid.
  • the second riser is a node taken from the second equipment or the body of the second equipment to provide the second input current from the current injection device to the second equipment or the body of the second equipment.
  • the second riser under test is a conductor that is connected with (i) the second equipment or the body of the second equipment to receive the second input current from the second equipment or the body of the second equipment and (ii) the earth grid to receive the first input current from the earth grid.
  • the second input current from the second equipment or the body of the second equipment and the first input current from the earth grid are provided to the first current measuring device and the second current measuring device for measuring the first current and the second current respectively.
  • an embodiment herein provides a method for detecting a faulty connection in an earth grid or an equipment.
  • the earth grid is connected to a plurality of equipment.
  • the plurality of equipment comprises a first equipment or a second equipment.
  • the first equipment is connected to the earth grid through a plurality of first risers and the second equipment from the plurality of equipment is connected to the earth grid through a second riser.
  • the method includes (i) modifying, using a frequency converter of a current injection device of a system, an input current with grid frequency into an input current with off grid frequency, (ii) regulating, using a current unit of the current injection device, the input current with off grid frequency into a variable input current with off grid frequency, (iii) receiving, using a first reference riser and a second riser of the system, a first input current with off-grid frequency from a current injection device and providing the first input current with off-grid frequency to an earth grid for detecting a faulty connection using the second riser that is under test when the current injection device is electrically connected to
  • the method comprises determining, using the system, a location of the faulty connection in the second equipment or the body of the second equipment more accurately by (i) changing the third current injection point to a pole structure of the second equipment above a first termination point where the second riser is terminated, (ii) providing the second input current with off-grid frequency at the third current injection point and to the second current injection point, (iii) measuring, using the second current measuring device, the second current that is received by the second riser from the pole structure of the second equipment, and (iv) comparing at least two ofthe first current, the second current and the second input current to determine a faulty connection in the first termination point.
  • the method comprises determining, using the system, a location of the faulty connection in the second equipment or the body of the second equipment more accurately by (i) changing (a) the third current injection point to a frame of the second equipment above a second termination point where a pole structure is bonded with the frame and (b) the second current injection point to the pole structure below the second termination point, (ii) providing the second input current with off-grid frequency to (a) the frame of the second equipment and (b) the pole structure which acts a riser under test, (iii) measuring, using the second current measuring device, the second current that is received by the pole structure from the frame of the second equipment, and (iv) comparing at least two ofthe first current, the second current, and the second input current to determine a faulty connection in the second termination point.
  • the method comprises determining, using the system, a location of the faulty connection in the second equipment or the body of the second equipment more accurately by (i) changing the second current injection point to the frame of the second equipment below a third termination point where the frame is bonded with the second equipment, (ii) providing the second input current with off-grid frequency to (a) the second equipment and (b) the frame of the second equipment which acts a riser under test, (iii) measuring, using the second current measuring device, the second current that is received by the frame of the second equipment from the second equipment, and (iv) comparing at least two ofthe first current, the second current, and the second input current to determine a faulty connection in the third termination point.
  • the method comprises electrically connecting the current injection device to the frame of the second equipment or the pole structure of the second equipment at the third current injection point for providing the second input current with off-grid frequency.
  • the system detects the faulty connection in the earth grid or the equipment more accurately.
  • the system may detect the faulty connection in the earth grid or the equipment during a flow of current in the earth grid/equipment or when the earth grid/equipment is in a working condition.
  • the system provides low input current to the earth grid/equipment, thereby avoiding the damages in the equipment/earth grid and avoid accidents while detecting the faulty connection.
  • the low current can be provided to the earth grid/equipment even when the high current is passing through the earth grid/equipment without shutting down the high current in the earth grid.
  • the low current with off grid frequency provided to the earth grid/equipment for detecting the faulty connection without disturbing the high current in the earth grid/equipment with a grid frequency.
  • FIG. 2 is an exploded view of the system of FIG. Ithat detectsa faulty connection in a first termination point of the equipment (i.e. a second equipment) having a single riser (i.e. a second riser) according to some embodiments herein;
  • a first termination point of the equipment i.e. a second equipment
  • a single riser i.e. a second riser
  • FIG. 3 is an exploded view of the system of FIG. Ithat detectsa faulty connection in a second termination point of the equipment (i.e. a second equipment) having a single riser (i.e. a second riser) according to some embodiments herein;
  • FIG. 4 is an exploded view of the system of FIG. Ithat detectsa faulty connection in a third termination point of the equipment (i.e. a second equipment) having a single riser (i.e. a second riser) according to some embodiments herein;
  • FIG. 5 is a block diagram of the current injection device of FIG. 1 that provides a low input current to the earth grid or the equipment to detect a faulty connection in a riser under test that is connected to the earth grid or the equipmentaccording to some embodiments herein;
  • FIGS. 6A-6B are flow diagrams that illustrate a method for detecting a faulty connection in the earth grid or the equipment using the system of FIG. 1 according to some embodiments herein.
  • the system includes an earth grid 104, a plurality of equipment 102 A-B, a current injection device 110 and a plurality of current measuring devices (116, 118).
  • the plurality of equipment 102A-B is connected to the earth grid 104.
  • the first equipment 102A is connected to the earth grid 104 through a plurality of first risers 106 A-B.
  • the second equipment 102B is connected to the earth grid 104 through a second riser 108.
  • the current injection device 110 includes a frequency converter and a current unit.
  • the frequency converter modifies an input current with grid frequency into an input current with off grid frequency.
  • the current unit regulates the input current with off grid frequency into a variable input current with off grid frequency.
  • the first reference riser 106A and the second riser 108 receive a first input current with off-grid frequency from the current injection device 110 and provide the first input current with off-grid frequency to the earth grid 104 for detecting a faulty connection using the second riser 108 that is under test.
  • the second equipment 102B or the body of the second equipment 102B and the second riser 108 receive a second input current with off grid frequency from the current injection device 110 and provide the second input current with off-grid frequency to the second riser 108 under test for detecting a faulty connection in the second equipment 102B or the body of the second equipment 102B using the second riser 108 that is under test.
  • the plurality of current measuring devices (116, 118) includes a first current measuring device 116 and a second current measuring device 118.
  • the first current measuring device 116 is connected to the second riser 108 below the second current injection point 114 and the second current measuring device 118 is connected to the second riser 108 above the second current injection point 114.
  • the first current measuring device 116 measures a first current that is received by the second riser 108 from the earth grid 104 and the second current measuring device 118 measures a second current that is received by the second riser 108 from the second equipment 102B or the body of the second equipment 102B.
  • the system compares the first current, the second current, the first input current, and the second input current and determines a faulty connection in (i) the second equipment 102B if at least one of (a) the second current that is received by the second riser 108 under test from the body of the second equipment 102B is below the first current that is received by the second riser 108 under test from the earth grid 104, (b) the second current that is received by the second riser 108 under test from the second equipment 102B is below the second input current that is provided to the body of the second equipment 102B, or (c) the second current that is received by the second riser 108 under test from the body of the second equipment 102B is zero, and (ii) the earth grid 104 if at least one of (a) the first current that is received by the second riser 108 under test from the earth grid 104 is below the second current that is received by the second riser 108 under test from the body of the second equipment 102B, (b) the first current that is received by the
  • the first current injection point 112 is a point in the first reference riserlO6A at which a first input current is injected by the current injection device 110.
  • the second current injection point 114 is a point in the secondriserl08 or a pole structure/a frame of the second equipment 102B at which the second input current is injected by the current injection device 110.
  • the third current injection point 120 is a point in the second equipment 102B or a pole structure/a frame of the second equipment 102B at which a second input current is injected by the current injection device 110.
  • the body of the second equipment 102B may be a frame 124, a pole structure 122, an equipment, or any suitable means of connecting the second equipment 102B to the second riser 108.
  • the first input current or the second input current ranges from 1 ampere to 20 amperes. In some embodiments, the first input current or the second input current ranges from 1 ampere to 40 amperes. In some embodiments, the first input current or the second input current ranges from 400 amperes. In some embodiments, the first input current or the second input current comprises an alternate current (AC) or a direct current (DC). In some embodiments, the first reference riser 106A is a conductor that connects the current injection device 110 and the earth grid 104.
  • the first reference riser 106A is a node taken from the earth grid 104 to provide the first input current from the current injection device 110 to the earth grid 104.
  • the second riser 108 is a node taken from the second equipment 102B or the body of the second equipment 102B to provide the second input current from the current injection device 110 to the second equipment 102B or the body of the second equipment 102B.
  • the second riser 108 under test is a conductor that is connected with (i) the second equipment 102B or the body of the second equipment 102B to receive the second input current from the second equipment 102B or the body of the second equipment 102B and (ii) the earth grid 104 to receive the first input current from the earth grid 104.
  • the second input current from the second equipment 102B or the body of the second equipment 102B and the first input current from the earth grid 104 are provided to the first current measuring device 116 and the second current measuring device 118 for measuring the first current and the second current respectively.
  • the system may include a temporary riser that is connected to the second equipment 102B and a reference riser of a third equipment of the plurality of equipment during testing.
  • the current injection device 110 injects the second current to the second riser 108 on the second equipment 102B
  • the first current measuring device 116 that is connected to the second riser 108 measures the first current received by the second riser from the earth grid 104 below
  • the second current measuring device 118 that is implemented on the second riser 108 measures the second current received from the second equipment 102Band the temporary riser that is connected to the second equipment 102B.
  • the system compares the first current and the second current that are measured and detects a faulty connection in the second equipment 102B if the first current measured is lesser than the second current or vice versa.
  • the second equipment 102B has a first pole structure and a second pole structure.
  • the system detects a faulty connection in the second equipment 102B by injecting the second input current at the second injection point in the first pole structure and measuring the current received by the second pole structure using the current measuring device.
  • Theplurality of equipment 106A-B is connected with the earth grid 104 to receive a current from electrical substations.
  • the current may be a grid current.
  • the earth grid 104 is buried under the earth to dissipate fault currents flowing in from above grade steel structures.
  • the current from the electrical substations flows to the plurality of equipment 106A-Bthrough the earth grid 104.
  • the plurality of equipment 106A-B may be any of:current transformer, potential transformer, machines, motors, and the like.
  • the plurality of equipment 106A-Bconnected with the earth grid 104 receives lessercurrent with low voltage if there is some breakage in the earth grid 104.
  • the system detects the faulty connection in the riser under test that is connected to the earth grid 104 buried under the earth using the current injection device 110 and the current measuring devices (116, 118).
  • the earth grid 104 is made of at least one of copper or aluminium. The system detects the faulty connection in the riser under test that is connected to the earth grid 104 without disturbing or shutting down the grid current.
  • the current injection device 110 is connected with the earth grid 104 to provide a low input current to detect the faulty connection in the earth grid 104 buried under the earth without excavating.
  • the current injection device 110 receives an input current (e.g. the first input current and the second input current) from an electrical grid connected with the substations.
  • the system includes a voltage regulator that is used to monitor a flow of the input current (e.g. the first input current and the second input current) with off grid frequency and to regulate the voltage.
  • the voltage regulator includes a capacitor to regulate the voltage.
  • the grid frequency and the off-grid frequency is different for providing the low input current to the earth grid 104 when the high grid current is flowing in the earth grid 104.
  • the system detects that the riser (e.g. the second riser 108) that is under test is weakly connected with the equipment if the second current is below the first current.
  • the system detects that the riser (e.g. the second riser 108) that is under test is weakly connected with the earth grid 104 if the first current is below the second current.
  • the system detects that the riser (e.g. the second riser 108) that is under test is open towards the second equipment 102Bor the earth grid 104 if the second current or the first current is zero.
  • the first and second currents are measured with an increased excitation voltage to determine an extent of weakness of the connection.
  • the voltage drop is also measured along with the first and second currents to accurately determine a condition of the riser that is under test.
  • FIG. 2 is an exploded view of the system of FIG. Ithat detectsa faulty connection in a first termination point 202 of the equipment (i.e. a second equipment 102B) having a single riser (i.e. a second riser 108) according to some embodiments herein.
  • a first termination point 202 of the equipment i.e. a second equipment 102B
  • a single riser i.e. a second riser 108
  • the system determines a location of the faulty connection in the second equipment 102B or the body of the second equipment 102B more accurately by (i) changing the third current injection point 120 to a pole structure 122 of the second equipment 102B above a first termination point 202 where the second riser 108 is terminated, (ii) providing the second input current with off-grid frequency at the third current injection point 120 and to the second current injection point 114, (iii) measuring, using the second current measuring device 118, the second current that is received by the second riser 108 from the pole structure 122 of the second equipment 102B, and (iv) comparing at least two ofthe first current, the second current and the second input current to determine a faulty connection in the first termination point 202.
  • the first termination point 202 is a termination point at which the second riser 108 is terminated on the pole structure 122 of the second equipment 102B.
  • FIG. 3 is an exploded view of thesystem of FIG. Ithatdetects a faulty connection in a second termination point 302 of the equipment (i.e. a second equipment
  • the system determines a location of the faulty connection in the second equipment 102B or the body of the second equipment 102B more accurately by (i) changing (a) the third current injection point 120 to a frame 124 of the second equipment 102B above a second termination point 302 where a pole structure 122 is bonded with the frame 124 and (b) the second current injection point 114 to the pole structure 122 below the second termination point 302, (ii) providing the second input current with off-grid frequency to (a) the frame 124 of the second equipment 102B and (b) the pole structure 122 which acts a riser under test, (iii) measuring, using the second current measuring device 118, the second current that is received by the pole structure 122 from the frame 124 of the second equipment 102B, and (iv) comparing at least two ofthe first current, the second current, and the second input current to determine a faulty connection in the second termination point 302.
  • the second termination point 302 is a termination point at which the pole structure 122 of the second equipment 102B is bonded with the frame 124 of the second equipment 102B.
  • FIG. 4 is an exploded view of the system of FIG. Ithat detectsa faulty connection in a third termination point 402 of the equipment (i.e. a second equipment 102B) having a single riser (i.e. a second riser 108) according to some embodiments herein.
  • a third termination point 402 of the equipment i.e. a second equipment 102B
  • a single riser i.e. a second riser 108
  • the system determines a location of the faulty connection in the second equipment 102B or the body of the second equipment 102B more accurately by (i) changing the second current injection point 114 to the frame 124 of the second equipment 102B below a third termination point 402 where the frame 124 is bonded with the second equipment 102B, (ii) providing the second input current with off-grid frequency to (a) the second equipment 102Band (b) the frame 124 of the second equipment 102Bwhich acts a riser under test, (iii) measuring, using the second current measuring device 118, the second current that is received by the frame 124 of the second equipment 102B from the second equipment 102B, and (iv) comparing at least two ofthe first current, the second current, and the second input current to determine a faulty connection in the third termination point 402.
  • the third termination point 402 is a termination point at which the frame 124 of the second equipment 102B is bonded with the second equipment 102B.
  • the current injection device 110 is electrically connected to the frame 124 of the second equipment 102B or the pole structure 122 of the second equipment 102B at the third current injection point 402 for providing the second input current with off-grid frequency.
  • FIG. 5 is a block diagram of the current injection device 110 of FIG. 1 that provides a low input current (e.g. a first input current or a second input current) to the earth gridl04 or the equipment (e.g. 106A-B) to detect a faulty connection in a riser under test that is connected to the earth grid 104 or the equipment according to some embodiments herein.
  • the current injection device 110 includes a frequency converter 502 and a current unit 504.
  • the frequency converter 502 receives an input current from an electrical grid connected with electrical substations. In some embodiments, the input current received from the electrical grid is in the grid frequency.
  • the frequency converter 502 modifies the input current with grid frequency into the input current with off-grid frequency.
  • the grid frequency is modified into the off-grid frequency to provide the input current with off-grid frequency into the earth grid 104 even when the high current is flown in the earth grid 104.
  • the output from the frequency converter 502 is provided to the current unit 504.
  • the current unit 504 regulates the input current with off-grid frequency into the variable input current with off grid frequency.
  • the input current may be varied between a range of 1 ampere to 20 amperes.
  • the input current with off grid frequency is regulated based on the grid current with grid frequency passing in the earth grid 104.
  • the regulated input current is provided to the earth grid 104 through afirst reference riser 112.
  • FIGS. 6A-6B are flow diagrams that illustrate a method for detecting a faulty connection in the earth grid 104 or the equipment (i.e. a second equipment 102B) using the system of FIG. 1 according to some embodiments herein.
  • the earth grid is connected to a plurality of equipment 102A-B.
  • the plurality of equipment 102 A-B comprises a first equipment 102 A or a second equipment 102B.
  • the first equipment 102 A is connected to the earth grid 104 through a plurality of first risers 106 A-B and the second equipment 102Bfrom the plurality of equipment 102A-Bis connected to the earth grid 104 through a second riser 108.
  • an input current with grid frequency is modified, using a frequency converter 502 of a current injection device 110 of a system, into an input current with off grid frequency.
  • the input current with off grid frequency is regulated, using a current unit 504 of the current injection device 110, into a variable input current with off grid frequency.
  • a first input current with off-grid frequency is received, using a first reference riser 106A and a second riser 108 of the system, from a current injection device 110 and providing the first input current with off-grid frequency to an earth grid 104 for detecting a faulty connection using the second riser 108 that is under test when the current injection device 110 is electrically connected to (i) the first reference riser 106A from the plurality of the first risers 106A-B at a first current injection point 112 and (ii) the second riser 108 at a second current injection point 114.
  • a second input current with off grid frequency is received, using a second equipment 102B or a body of the second equipment 102B and the second riser 108 of the system, from the current injection device
  • the current injection device 110 and providing the second input current with off-grid frequency to the second riser 108 under test for detecting a faulty connection in the second equipment 102B or the body of the second equipment 102B using the second riser 108 that is under test when the current injection device 110 is electrically connected to (i) a second equipment 102B or a body of the second equipment 102B at a third current injection point 120 and (ii) the second riser 108 at the second current injection point 114.
  • a first current that is received by the second riser 108 from the earth grid 104 is measured, using a first current measuring device 116 of the system.
  • a second current that is received by the second riser 108 from the second equipment 102B or the body of the second equipment 102B is measured, using a second current measuring device 118 of the system.
  • the first current, the second current, the first input current, and the second input current is compared, using the system, and determining a faulty connection in(i) the second equipment 102B if at least one of (a) the second current that is received by the second riser 108 under test from the body of the second equipment 102B is below the first current that is received by the second riser 108 under test from the earth grid 104, (b) the second current that is received by the second riser 108 under test from the second equipment 102B is below the second input current that is provided to the body of the second equipment 102B, or (
  • the method comprises determining, using the system, a location of the faulty connection in the second equipment 102B or the body of the second equipment 102B more accurately by (i) changing the third current injection point 120 to a pole structure 122 of the second equipment 102B above a first termination point 202 where the second riser 108 is terminated, (ii) providing the second input current with off-grid frequency at the third current injection point 120 and to the second current injection point 114, (iii) measuring, using the second current measuring device 118, the second current that is received by the second riser 108 from the pole structure 122 of the second equipment 102B, and (iv) comparing at least two of the first current, the second current and the second input current to determine a faulty connection in the first termination point 202.
  • the method comprises determining, using the system, a location of the faulty connection in the second equipment 102B or the body of the second equipment 102B more accurately by (i) changing (a) the third current injection point 120 to a frame 124 of the second equipment 102B above a second termination point 302 where a pole structure 122 is bonded with the frame 124 and (b) the second current injection point 114 to the pole structure 122 below the second termination point 302, (ii) providing the second input current with off-grid frequency to (a) the frame 124 of the second equipment 102B and (b) the pole structure 122 which acts a riser under test, (iii) measuring, using the second current measuring device 118, the second current that is received by the pole structure 122 from the frame 124 of the second equipment 102B, and (iv) comparing at least two of the first current, the second current, and the second input current to determine a faulty connection in the second termination point 302.
  • the method comprises determining, using the system, a location of the faulty connection in the second equipment 102B or the body of the second equipment 102B more accurately by (i) changing the second current injection point 114 to the frame 124 of the second equipment 102B below a third termination point 402 where the frame 124 is bonded with the second equipment 102B, (ii) providing the second input current with off-grid frequency to (a) the second equipment 102B and (b) the frame 124 of the second equipment 102B which acts a riser under test, (iii) measuring, using the second current measuring device 118, the second current that is received by the frame 124 of the second equipment 102B from the second equipment 102B, and (iv) comparing at least two of the first current, the second current, and the second input current to determine a faulty connection in the third termination point 402.
  • the method comprises electrically connecting the current injection device 110 to the frame 124 of the second equipment 102B or the pole structure 122 of the second equipment 102B at the third current injection point 120 for providing the second input current with off-grid frequency.
  • the system/method detects the faulty connection in the earth grid 104 or the equipment more accurately.
  • the system/method may detect the faulty connection in the earth grid 104 or the equipment during a flow of current in the earth grid 104/the equipment or when the earth grid 104/the equipment is in a working condition.
  • the system/method provides low input current to the earth grid 104/the equipment, thereby avoiding the damages in the equipment/earth grid 104 and avoid accidents while detecting the faulty connection.
  • the low current can be provided to the earth grid 104/the equipment even when the high current is passing through the earth grid 104/the equipment without shutting down the high current in the earth grid 104.
  • an area of the faulty connection below/above ground is excavated or identified and the connection in the area is repaired.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

L'invention concerne un système de détection d'une connexion défectueuse dans une grille terrestre (104) ou un équipement, qui comprend une pluralité d'équipements (102A-B), un dispositif d'injection de courant (110) et une pluralité de dispositifs de mesure de courant (116, 118). Une première ailette de connexion de référence (106A) et une deuxième ailette de connexion (108) reçoivent un premier courant d'entrée provenant du dispositif d'injection de courant et fournissent le premier courant d'entrée à la grille terrestre. La deuxième ailette de connexion reçoit un deuxième courant d'entrée provenant du dispositif d'injection de courant et fournit le deuxième courant d'entrée à la deuxième ailette de connexion à l'essai. La pluralité de dispositifs de mesure de courant comprend un premier dispositif de mesure de courant qui mesure un premier courant et un deuxième dispositif de mesure de courant qui mesure un deuxième courant. Le système compare le premier courant, le deuxième courant, le premier courant d'entrée et le deuxième courant d'entrée et détermine une connexion défectueuse dans la grille terrestre ou l'équipement.
PCT/IN2023/050731 2022-07-29 2023-07-29 Système et procédé de détection d'une connexion défectueuse dans une grille terrestre ou un équipement WO2024023853A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202243043658A IN202243043658A (fr) 2022-07-29 2022-07-29
IN202243043658 2022-07-29

Publications (1)

Publication Number Publication Date
WO2024023853A1 true WO2024023853A1 (fr) 2024-02-01

Family

ID=89705742

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2023/050731 WO2024023853A1 (fr) 2022-07-29 2023-07-29 Système et procédé de détection d'une connexion défectueuse dans une grille terrestre ou un équipement

Country Status (2)

Country Link
IN (1) IN202243043658A (fr)
WO (1) WO2024023853A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024142099A1 (fr) * 2022-12-27 2024-07-04 Jef Techno Solutions Pvt Ltd Système et procédé permettant de détecter une connexion défectueuse à la terre dans un réseau terrestre à partir d'un équipement

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022097165A1 (fr) * 2020-11-03 2022-05-12 Jef Techno Solutions Pvt Ltd Système et procédé de détection de connexion défectueuse dans une grille de mise à la terre
WO2022157800A1 (fr) * 2021-01-19 2022-07-28 Jef Techno Solutions Pvt Ltd Système pour la détection d'une intégrité électrique de mise à la terre entre réseaux

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022097165A1 (fr) * 2020-11-03 2022-05-12 Jef Techno Solutions Pvt Ltd Système et procédé de détection de connexion défectueuse dans une grille de mise à la terre
WO2022157800A1 (fr) * 2021-01-19 2022-07-28 Jef Techno Solutions Pvt Ltd Système pour la détection d'une intégrité électrique de mise à la terre entre réseaux

Also Published As

Publication number Publication date
IN202243043658A (fr) 2023-07-28

Similar Documents

Publication Publication Date Title
US20230314532A1 (en) System and method for detecting a faulty connection in an earth grid
CN100429521C (zh) 绝缘监视方法和设备
FI115488B (fi) Menetelmä ja laitteisto katkeilevan maasulun tunnistamiseksi sähkönjakeluverkossa
US8310242B2 (en) Circuit arrangement and method for insulation monitoring for inverter applications
WO2024023853A1 (fr) Système et procédé de détection d'une connexion défectueuse dans une grille terrestre ou un équipement
KR101269131B1 (ko) 스마트 멀티채널 전력량계를 이용한 누설전류 검출장치 및 그 방법
CN107290629B (zh) 一种10kv低压配电网接地故障定位方法
JP2001242206A (ja) 接地抵抗の測定方法
JP5578573B2 (ja) 直流回路の絶縁抵抗測定器、静電容量測定器、絶縁抵抗測定方法および静電容量測定方法
EP2778694B1 (fr) Appareil et procédé de test d'isolation d'un réseau d'alimentation électrique
CN105182157A (zh) 基于高精度检测电流的中性点多点接地检测装置
EP0437214B1 (fr) Méthode de diagnose de détérioration d'isolation d'un appareil électrique
US20240012068A1 (en) System for detecting an electrical grounding intergrid integrity
WO2024142099A1 (fr) Système et procédé permettant de détecter une connexion défectueuse à la terre dans un réseau terrestre à partir d'un équipement
US20150048840A1 (en) Neutral grounding resistor monitor
CN205015427U (zh) 基于高精度检测电流的中性点多点接地检测装置
JPS63265516A (ja) 三相交流励磁装置
JP2014202696A (ja) 漏電検出方法
CN114487708A (zh) 一种高低压配电线路故障测量装置及使用方法
CN113567807A (zh) 一种电力电缆金属护套层电流异常的检测方法
KR20050048407A (ko) 접지저항 측정장치
CN111650532A (zh) 一种输电线路接地点判定方法
JPH07294588A (ja) ケーブル絶縁不良区間の活線下識別方法
KR20190104606A (ko) 발전기에서의 오류를 결정하기 위한 방법, 및 발전기 테스트 시스템
KR100521635B1 (ko) 주접지극 탐색장치

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23845866

Country of ref document: EP

Kind code of ref document: A1