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The GARPUR R&D project develops, assesses and evaluates probabilistic power system reliability criteria and transmission system reliability management strategies in the Pan-European power system. The goal is to improve the balance between reliability performance targets and their associated costs, compared to existing approaches using an ‘N-1’ criterion. A GARPUR Quantification Platform (GQP) will be developed to compare and evaluate those criteria. Both the GQP and the newly developed reliability criterion will be tested using pilot experiments by transmission system operators involved in the project.




Closed project



The increasing uncertainty of generation due to intermittent energy sources, combined with the opportunities provided by demand-side management and energy storage, call for new reliability criteria with a better balance between reliability and costs. GARPUR focusses on the development, assessment and evaluation of new power system reliability criteria and management strategies while maximizing social welfare. It considers four time horizons of the TSO decision making process involving system development, asset management, operational planning and power system operation, as well as the multi-agent and multi-area nature of the system.

In order to get general acceptance of alternative reliability criteria, it is important to get an objective evaluation of the performance of various reliability criteria, especially against the state of the art approach. A GARPUR Quantification Platform (GQP) will be developed for this task. Various TSO partners involved in the project will pilot test both the newly developed reliability criterion and the GQP.

The quantification platform will be used to assess the impact of using alternative reliability criteria on a national and Pan-European level, to convince power system stakeholders of working with a more cost-effective approach. Currently, reliability management is mostly done using a rule-based manner based on experience, while small faults or faulty operations result in a high financial impact. Furthermore, the quantification could also be used in an industrial context to improve the cost-effectiveness of power system reliability management at large industrial sites.

EnergyVille's Contribution

The electrical systems division of EnergyVille is involved in the development and implementation of the prototype Garpur Quantification Platform, a tool to evaluate ways of power system reliability management and reliability criteria. The objective is to ensure reliability in a cost-effective way rather than optimizing the decision making process. Therefore, numerical simulations of various reliability criteria and management strategies will be executed in different application contexts to quantify the performance of those criteria. The performance of the GARPUR reliability criterion and its management will be compared to an existing approach, e.g. an N-1 criterion. This allows to appraise the socio-economic impact and the impact on the reliability level of using new reliability management strategies. In the end, a roadmap to evolve the prototype version of the platform towards an industry grade tool will be developed.

GARPUR = Generally accepted reliability principle with uncertainty modelling and through probabilistic risk assessment. 

Dirk van hertem


Dirk van Hertem

Professor Electrical Engineering at EnergyVille/KU Leuven