  The increasing adoption of renewable energy sources increases the need for
balancing power. The security concerns of the distribution system operators are
increasing due to fast adoption of distributed energy resources. So far,
various operational models are proposed to manage the distributed energy
resources for economic benefit. However, there is lack of an efficient
operational model that balances the security, market, and uncertainty
management. With the focus on the aggregators operation, this paper developed
an operational model for continuous operation of aggregators interactively with
the grid operators. A rolling optimization model is developed to manage the
uncertainties from prediction errors. The network security is ensured
continuously through an iterative price negotiation process between the
distribution network operator and the aggregators. The optimality of the
solution is guaranteed by convexification of the mixed integer formulation.
