The IEPG group owns the following research facilities and laboratories for its research:


A Real-Time Digital Simulator Laboratory (RTDS Lab)


RTDS at TU Delft consists of 8 racks supplied with 3PC cards that are able to be used for real time simulation with a time step greater than 50µs (to be upgraded via new PB5 cards to 2µs in 2015). The RTDS Simulator allows to test protection and controls in real time, where an hour in the real world equals an hour in the simulator. Utilizing modular custom computing hardware and software, simulations performed encompass results from DC up to electromagnetic transients. Inherently, these results include information regarding the system load flow and transient stability, as well as that of harmonics and faster disturbances.

Applications include

  • Equipment can be thoroughly test-driven and customized.
  • New power system network designs or upgrades can be evaluated and accurately tested.
  • Black box real-world equipment (e.g. closed-source controllers) can be tested and integrated in larger test scenarios without having a model.
  • Interoperability of multi-vendor installation can be validated
  • Models and real implementations (products) of components can be compared
  • Closed-loop testing of protective relays and control systems.
  • Studying general AC system operation including behavior of generation and transmission systems.
  • Investigating dynamic power system equipment interaction.
  • Studying interaction between integrated AC/DC systems.
  • Testing of control system of converter based equipment.
  • Integration and operation of distributed generation and renewables.
  • Investigation and testing of SMART Grid initiatives including wide area protection and control.

Software Laboratories

IEPG applies several tools for power system analysis (generation, transmission, and distribution). Among them are commercial software packages like DIgSILENT PowerFactory, PSS/E, and PSCAD, which are used extensively in national and international research projects with industrial and academic partners. Open source tools like OpenModelica and ATP-EMTP are alternative tools applied for the development of user defined models and controllers. These tools are used in combination with Matlab, Python, Fortran, and C++, to create highly automated and integrated solutions for modelling, simulation, and data processing, as well as to allow the application of the most powerful state-of-the art algorithms for assessment of system performance and design of control and protection schemes.

The analysis of the steady-steady performance (power flow and optimal power flow) and slow dynamic phenomena (few miliseconds to minutes) of electrical power systems is conducted by using DIgSILENT PowerFactory, PSS/E, and OpenModelica, whereas fast dynamic phenomena (few micro seconds to miliseconds) are studied by using DIgSILENT PowerFactory, PSCAD, and ATP-EMTP.

DIgSILENT PowerFactory is used in the teaching activities of the course ET4113 Power System Dynamics, whereas OpenModelica and MATPOWER are used in SET3065 Intelligent Electrical Power Grids. Matlab Simulink is the main tool used for the study of hybrid AC-DC systems in the course EE4545 Electrical Power Systems of the Future.

When the individual tools reach their limits, IEPG combines them into co-simulations. Using co-simulation, we can address problems larger in size and scope (such as integration of many distributed renewable resources) or the problems that are spanning across multi-energy carriers (such as integration of electricity and heat networks) . Mosiak and HLA are the co-simulation master tools that are used by IEPG to pass the messages between the simulators and to synchronize the execution of the co-simulation. In one such example, IEPG used OMNET++ with grid simulation tools to study impact of delays and cyber-attacks on the grid. In another, we used MATPOWER in combination with grid simulation tools to study the interplay between electricity markets and the grid. 

A High-voltage laboratory

 The High-voltage laboratory is the second largest in the Netherlands. Testing facilities include a 4 megavolt impulse generator and ac sources up to 1.5 megavolt.

Unique possibilities are offered to students and researchers enabling them to study full-scale high voltage equipment. For industry, tests are performed according to IEC 60060 ”High-Voltage test techniques”, like:

  • AC testing,
  • Impulse and switching impulse testing,
  • Corona and RIV testing,
  • Partial discharge testing,
  • Tangens delta testing

Additionally the laboratory is equipped with facilities for:

  • Dielectric spectroscopy
  • Space charge measurments
  • Thermal conductivity measurements