Protection of Transmission Lines Using Gps1

8/3/2019 Protection of Transmission Lines Using Gps1

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PROTECTION OFTRANSMISSION

LINESUSING GPS

M.S.SRAVANI, 083E1A0202.

DEPT OF EEE

JAGANS COLLEGE OF ENGG AND TECH,

CHOUTAPALEM, NELLORE.


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OVER VIEW}Introduction

}

Transmission system}Transmission line protection

}GPS satellite system

}Implementation

}Conclusion


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INTRODUCTION}New technique for protection of transmission

system

} System contains relays with fault detection andcommunication system

} Detects high frequency voltage transients

} Records the time instant at fault location

} Receives and transmits the digital signal oflocation information

} SCADA, sectionalizing circuit breakers providefast restoration


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TRANSMISSION SYSTEM


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TRANSMISSION LINE PROTECTION


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POSSIBLE FAULTS


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GPS SATELLITE SYSTEM

}Satellite based navigation system

}Network of 24 satellites in the orbit

}Works in any weather situation, at any

place

}Precise determination of location and time

}Should be looked on to signal of at least 3

satellites


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IMPLEMENTATION

} Involves in installation of GPS timing receivers

for every substation} FTIU produces a TTL pulse and time tags the

arrival of travelling wave

}Accuracy depends on time tagging

}More effective for less than 350KM


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SOURCES OF ERRORS

} Ionosphere and troposphere delays

} Signal multipath

} Receiver clock errors

}Number of satellites visible


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CONCLUSION} Thus the use of GPS in protection of

transmission systems is beneficial with

respect to

} Value regarding programmatic goals:more reliable monitoring using GPS

related technologies.

} Technical merit: new fault location

algorithm based on new input data.

} Emphasis on transfer of technology: CCETpartnership aimed at commercialization.

} Overall performance: on time, with allgoals met so far.


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Protection of Transmission Lines Using Gps1

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