The EU-funded TWENTIES project – ‘Transmission system operation with a large penetration of wind and other renewable electricity sources in electricity networks using innovative tools and integrated energy solutions’ (launched April 2010) – was aimed to advance the development and deployment of new technologies which facilitate the widespread integration of more onshore and offshore wind power into the European electricity system by 2020 and beyond.
TWENTIES, one of the largest renewable energy demonstration projects funded under the EC’s FP7 program, was organized around six large-scale demonstration projects grouped into three task forces – Contribution of variable generation and flexible load to system services; Reliable offshore network and wind development; and Improvements in the flexibility of the transmission grid.
These were complemented by three work packages – one focused on the assessment of non-technology barriers to the development of a real offshore grid, and the other two related to the replicability and scalability at EU level of the results of the demonstration projects.
TWENTIES shows that Europe’s energy infrastructure can be used a lot more efficiently than it currently is. The most significant findings include the following:
- Wind farms can provide wide area voltage control, and secondary frequency control services to the system
- Virtual power plants enable reliable delivery of ancillary services, like voltage control and reserves, by intelligent control of distributed generation including wind farms and industrial consumption
- A DC circuit breaker prototype was tested successfully
- By applying ‘high wind ride through control’, reserve requirements are cut in half
- By using Real Time Thermal Rating (RTTR) or Dynamic Line Rating (DLR) for measuring and forecasting overhead line capacity, 10% more flow in average can go through equipped overhead lines
- By using the combined effect of DLR and power flow controlling devices to control the flows in the European grid, more wind in-feed can be integrated in the existing grid without jeopardizing the system security
- By controlling flows by means of PSTs, HVDCs and FACTS, local congestions can be alleviated in a flexible manner. A smart control of a set of such devices enables getting even more out of the existing grids.
A full summary of the project results is available in the TWENTIES final report HERE
A more detailed description of the work and the results achieved are available on the project site.