Compact Secondary Substations (CSS)

  • CSS is a type tested assembly comprising an enclosure containing Medium Voltage (MV) switchgear, Distribution transformers, Low Voltage (LV) switchboards, connections and auxiliary equipment.
  • CSS is for energy transformation in secondary distribution network from MV to LV or LV to MV systems.
  • These substations are typically installed in locations accessible to the public and should ensure protection for all people according to specified service conditions
  • All CSS components shall be type and routine tested per their relevant product standards

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  • RiesLing project case study - Smart Compact Secondary Substations practically implemented and tested by a utility

    RiesLing project case study - Smart Compact Secondary Substations practically implemented and tested by a utility

    With the integration of a large number of decentralized renewable energy generators in the distribution network the limits of stable network operation have been reached in many areas. The result is capacity bottlenecks in cables and transformers and voltage spikes in the network. In response to these challenges: Equip existing MV substations with online measurement and online monitoring via secured and managed communication. Upgrade MV substations using new MV compact switchgear including remote operation and additional functionality. Add new compact "Smart Modules" including voltage control for the LV system supplied by the substation. Use the online information from the equipped substations to improve load flow estimation and grid state forecast.

  • Future self-healing power distribution networks

    Future self-healing power distribution networks

    As various sources of renewable power generation are introduced, the medium-voltage (MV) distribution network must adapt to maintain high quality of supply through new network concepts and automated solutions. Dividing distribution networks into zones – separated by active and intelligent components – provides a way to handle fault situations in an optimal way. Communication is a central part of the zoning concept, as it is essential to know the status of the zone divider equipment and to control it.

    In a zoned distribution network, the CSS with its built in technology becomes a key node, and act as a 'smart' CSS.

  • Prefabricated Substations (CSS) in Smart Grid Application

    Prefabricated Substations (CSS) in Smart Grid Application

    In distribution networks affected by the introduction of renewable power generation along with a variety of critical load types, securing quality of supply requires new levels of automation.

    Smart CSS, with fully integrated RMU solutions, can be placed at key points in the network to monitor critical components and key network parameters. ABB Prefabricated Substations have the facility to be monitored, controlled or even have complete network management in order to offer full reliability to power providers.

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