6 hydropower plants, with 2 generators each

Refurbishment of the electrical and automation technology for six hydropower plants, with two generators each and superordinate external control (ÜOW/Q).

Control system:

  • 2 x SIMATIC S7 400 (for the generators)
  • 1 x SIMATIC S7 400
    • For controlling the dam and general control functions
    • Remote control communication via IEC104
  • 1 x SIMATIC S7 400
    • For the ÜOW/Q (superordinate external control)
    • Remote control communication via IEC104

Operating and monitoring system:

  • WinCC V7.3
  • 2 x redundant WinCC stations for local operation and monitoring in the power plant in automatic and manual modes, as well as for recording the measurement data

Bus systems:

  • Industrial Ethernet:
    • In optical redundant ring
    • Communication between the SIMATIC S7 controllers and with the operating and monitoring system
    • Remote logging using IEC 60870-5-104 for simultaneous communication with 3 control stations
  • Profibus:
    • Decentralized peripheral equipment for signal detection and control of auxiliary systems

Noteworthy aspects:

  • Time stamping of messages with a resolution of 3ms
  • DC/DC system
  • Supply and installation of a redundant, diverse DC power supply with battery unit and inverter
  • 400 VAC supply
  • Low voltage switchgear cabinets for two EB transformers
  • Supply and replacement of EB transformers
  • Switchover to auxiliary supply with emergency power supply