PREVENTIVE%20WARM-UP%20OF%20PHASE%20AND%20GROUND%20WIRES%20OF%20OVERHEAD%20POWER%20LINES%20BY%20LOADED%20DEVICES%20IN%20THE%20PERIOD%20OF%20GLAZE%20DANGER

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PREVENTIVE WARM-UP OF PHASE AND GROUND WIRES OF
OVERHEAD POWER LINES BY LOADED DEVICES IN THE
PERIOD OF GLAZE DANGER

• Y.R. HUNGER
• (ELSI GROUP),
• Ju.V. DEMIN,
• I.R. PIVCHIK, E.G. CHROMOV
• ("Sibenergosetproject JSC)
• Russia

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The damages of Odessaenergo power system
Lines switched off by means of electrical
protection
Damaged elements of overhead lines
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Icing prevention currents
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Variants of load implementation

• To switch on high voltage resistors.
• To switch on electroheaters.
• To switch on LV lines into short circuit.
• To use specially designed powerful ground
  electrodes.
• To switch on ground wires to 6-35 kV.

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Example of icing prevention
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Types of load-producing devices
10 kV module of 1,5 MW (BEL Co. Moscow, Russia)
Induction electroheaters Edison-500 (500 kW,
0,4 kV). ProducerSibtehnomach (Novosibirsk,
Russia)
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Some features of icing prevention

• 1. The duration of icing is short (2-5 days), and
  its start can be forecasted meteorologically.
• 2. The expected locations of icing are known.
• 3. The beginning of icing corresponds with the
  time of minimum load of overhead lines.
• 4. The networks disposable power is at its
  maximum level during the period of icing.

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CONCLUSIONS

• The method of icing prevention
• newly developed
• allows to protect a whole group of lines with
  various voltage
• doesn't require expensive equipment
• allows to minimise additional energy losses.