Ancillary Services Market Design in Distribution Networks: Review and Identification of Barriers
Konstantinos Oureilidis (Aristotle University of Thessaloniki)
Kyriaki-Nefeli Malamaki (Aristotle University of Thessaloniki)
Spyros Gkavanoudis (Aristotle University of Thessaloniki)
Milos Cvetkovic (TU Delft - Intelligent Electrical Power Grids)
Juan Manuel Mauricio (University of Seville)
Jose Maria Maza Ortega (University of Seville)
Jose Luis Martinez Ramos (University of Seville)
George Papaioannou
Charis Demoulias (Aristotle University of Thessaloniki)
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Abstract
The high proliferation of converter-dominated Distributed Renewable Energy Sources (DRESs) at the distribution grid level has gradually replaced the conventional synchronous generators (SGs) of the transmission system, resulting in emerging stability and security challenges. The inherent characteristics of the SGs are currently used for providing ancillary services (ASs), following the instructions of the Transmission System Operator, while the DRESs are obliged to offer specific system support functions, without being remunerated for these functions, but only for the energy they inject. This changing environment has prompted the integration of energy storage systems as a solution for transfusing new characteristics and elaborating their business in the electricity markets, while the smart grid infrastructure and the upcoming microgrid architectures contribute to the transformation of the distribution grid. This review investigates the existing ASs in transmission system with the respective markets (emphasizing the DRESs’ participation in these markets) and proposes new ASs at distribution grid level, with emphasis to inertial response, active power ramp rate control, frequency response, voltage regulation, fault contribution and harmonic mitigation. The market tools and mechanisms for the procurement of these ASs are presented evolving the existing role of the Operators. Finally, potential barriers in the technical, regulatory, and financial framework have been identified and analyzed.
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