GE DTR GEK-106305A, Инструкция по эксплуатации

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1. GENERAL DESCRIPTION AND APPLICATION
GEK-106305A DTR Digital Tap Changer Controller 5
1. GENERAL DESCRIPTION AND APPLICATION
New technologies have allowed in the last years a significant development in the integration of functions performed
by the different components of a power system. The reason for this integration is the bigger need for reducing and
optimizing the investments in equipment and installations, as well as the management and use of energy, due to the
significant savings involved.
This integration of functions includes not only the switchgear control devices for high and low voltage, protection for
the different elements, signaling and alarms in a substation, but also the monitoring of all elements, the analysis of
the available information (events, alarms, oscillography, load/demand profiles, etc.), and certain innovative functions
such as the substation maintenance, adaptive protections, etc.
DTR units are microprocessor based relays used for the voltage control in the power system.
DTR is used in MV substations for controlling the voltage, operating on the OLTC of power transformers.
The functions integrated in these units are:
A) CONTROL:
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Transformer OLTC control
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Overvoltage unit for monitoring the OLTC control
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Undervoltage unit for monitoring the OLTC control
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Overcurrent unit for monitoring the OLTC control
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Blocking functions for excessive number of operations (totals) and for excessive number of successive operations
in a determined period of time.
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Fast backward function, if the difference to the setpoint is excessive.
B) MONITORING AND REGISTER
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Metering and display of the phase current
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Metering and display of voltage
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Metering and display of frequency
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Display of the tap value. The device accepts the tap status coded in BCD or in contact per tap (please refer to
model list)
•
Metering and display of active power
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Metering and display of reactive power
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Metering and display of the power factor
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Metering and display of the voltage difference with respect to the setpoint.
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Display of the operation time
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Programmable graphic display showing the main statuses and measures
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Self check of the unit
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Counter for number of tap-ups, tap-downs and operations