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  • PCS-9590 DC De-Icer

  • Heavy ice coating can damage transmission lines and towers, ultimately leading to a power supply outage in partial or the entire grid network. To guarantee the safe operation of the power system in severe weather, NR Electric provides consumers with the PCS-9590 fixed DC de-icer and the PCS-9591 relocatable DC de-icer for the protection of transmission lines. The DC output voltage is adjustable. Different DC short-circuit currents can be supplied according to the conductor’s diameter and length. In addition, the de-icer device can also be used as SVC to quickly compensate reactive power, stabilize system voltage and improve power quality.

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  • The use of thyristor rectifiers can reduce the impact on power system during ice melting and ease the switch-over operations.
  • The DC de-icer device supports large current and large angle continuous stable operation. It is applicable to tranmission lines with different conductor diameters and lengths.
  • The PCS-9590/9591 DC de-icer can adopt container type installation and valve hall installation, effectively saving the land resource, shortening the site construction period and easing the equipement transportation.
  • The device adopts reliable and compact structure with watercooling system and compact valve banks.
  • The PCS-9590/9591 is equipped with 6 phase seg circuit breakers enabling the automatic switchover among various ice melting modes and realizing the balanced ice melting for AC lines.
  • NR Electric also provides the high performance control and protection system for DC de-icing melting characteristics has been developed and features and high reliability.
  • Primary system of DC ice melting device requires only very small number of operations to realize SVC function.

The fixed DC de-icer is applicable to long transmission lines with high voltage level. The power supply of PCS-9590 is normally fed by a 35kV AC bus. The PCS-9590 fixed DC de-icer includes:

  • The PCS-9590 has two standard commercial containers: one is used to install of valve banks and water cooling system, the other is equipped with phase segregated circuit breakers and control panels.
  • One 3-winding converter transformer is used to facilitate current commutation among valve banks.
  • The key component in the DC de-icer is the 12 pulsation conversion valve banks which can convert the AC current to DC current.
  • The water cooling system is consisted of indoor forced water cooling and outdoor forced air cooling components to cool converter valve banks.
  • The phase segregated circuit breakers is used to select the target AC line and realize balanced de-icer of AC lines.
  • The control and protection system provides supervision and protection functions for the whole DC de-icer device.

The relocatable DC de-icer device is applicable to short lines with low voltage levels. Normally the power supply of device is fed by a 10kV AC bus. The PCS-9591 relocatable DC de-icer includes:

  • The PCS-9591 has one standard commercial container to install all equipment.
  • The key component is a 6 pulsation conversion valve banks used to convert AC current to DC current.
  • The cooling system of relocatable DC de-icer is composed of indoor forced water cooling and outdoor forced air cooling to cool converter valve banks.
  • The phase segregated circuit breakers is used to select the target AC line and realize balanced de-icer of AC lines.
  • The control and protection system provides supervision and protection functions for the whole DC de-icer device.