Harmony

Project description

Reasons behind this project

As other power systems, the European grid experiences a massive RES development, bringing up many new challenges for system operation. One of such challenges is the massive penetration of Power Electronic (PE) converters (e.g. PV & wind generation units, batteries & chargers, HVDC connections, statcoms, etc.) on a large scale as they may cause instable system operation (resonance) or harmonic waves that can interfere and/or damage the neighbouring equipment.

Where a few, local (a plant) and rather simple situations had to be analysed in the past, the risk is growing exponentially, as more devices connect, as they are more diverse, as they are closer one to another. Grid regulations are all the more demanding that complex situations can actually not be addressed. And, as a consequence, strong mitigation measures are integrated in every piece of equipment, at a significant additional cost… without preventing all undesired interactions.

In HARMONY will be developed a mathematical framework capable of simulating all components in HPS for system stability assessment studies. The developed tool will be comprehensive and user-friendly for the analysis of stability assessment and the mitigation of instabilities in the power systems of interest. It will be efficient in investigating multi-terminal HVDC power systems (offshore and onshore side), interconnections between transmission and distribution power system side, controller interoperability, and HVDC protection. Presently available commercial tools require expensive equipment, with long-time model development, and computationally and time expensive simulations (minutes to hours). In contrast, the newly designed tool will provide execution time in the range of several seconds using general-purpose CPUs.

Project objectives

Harmony (“HARMONic stabilitY assessment of PE-penetrated power systems”) shall develop such a framework, with the following lines of research actions, all opensource:

  • Design of the harmonic stability assessment solver with OPF used for setting up the operating point.
  • Design of the dynamic phasor approach for time domain simulation.

In order to meet those goals, the work will be split into:

  • WP1: Developing models for the HPS and dynamic phasor (DP) components’ models
  • WP2: Developing optimization models for harmonic and DP analysis of the AC-DC power system
  • WP3: Mathematical framework implementation and testing

Project milestones:

M1: Power electronic converters’ spectral and DP model validation by experiments (in RTDS laboratory, after 1.5 years from the project start).
M2: Design and interconnection of spectral, DP, and power flow models of the power electronic converter (end of year 2).
M3: Tested validation of the complete framework by experiments (in RTDS laboratory, after 2.5 years from the project start).

Project partners:

Harmony is a common project, undertaken by TU Delft, TenneT and Swissgrid.

Project deliverables:

Related event to this project

Contact(s)

info@cresym.eu


A.Lekic@tudelft.nl

 


Robert.dimitrovski@tennet.eu


Ressources



Harmony teams channel workspace (private)

ACDC OPF github space

Harmony framework github space (private)