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EM-Transients - Electromagnetic Transients in future Power Systems

EM-Transients - Electromagnetic Transients in future Power Systems

The future power system will be highly complex due to the integration of renewables and realization of smart grids.

The transient overvoltage stresses on components will increase due to the more flexible system topologies, more frequent switching operations, and increased usage of cables and power electronic converters. Safe implementation will require extensive computer simulations during its planning an engineering phases. Existing simulation tools have limited accuracy for representing some critical components such as transformers and cables. The project will produce models that are sufficiently accurate and compatible with available circuit simulators, and make use of the models in system simulation studies in order to pinpoint bad configurations. The models will be available for other users.

The main tasks of the project are:

  • Review of future trends in land based and offshore power systems
  • Improve component modeling
    • Transformer modeling
    • Cable modeling
    • Circuit breaker modeling
    • Instrument transformer modeling
    • Grounding impedance
    • Network equivalencing
  • Perform demo simulations to investigate:
    • system overvoltages caused by high-frequency interaction between cables and transformers (switching events and faults)
    • winding overvoltages caused by restrikes in vacuum breaker
    • phenomena related to energization and faults in power systems with long cables

See the project website

Published 29 September 2014
Chief Scientist

Project duration

2011 - 2015