## 6 Conclusions and Future Work on the Redispatch Model  
The redispatch model developed in this work is successful because it contributes to the decisions made by the system operator over any other method related to the real-time electricity generation market. This redispatch model replaces the traditional and inefficient economic merit list used in several South American countries, allowing us to mitigate the non-optimal results of operating costs due to unjustified dispatches of plants with the economic merit list methodology as the only resource in real-time operation. Therefore, it is necessary to evolve to a more sophisticated redispatch model that adapts to the challenges of real-time operation and market, considering the massive solar-wind renewable generation that Chile and the world are facing, with thousands of megawatts added to conventional generation. The proposed redispatch model is fast to execute in order to face the daily real-time operation that deviates from the scheduled operation of the unit commitment. The convergence times for the different real case studies to which the redispatch model was subjected are acceptable and the economic results have absolute validity. The system operator can execute, in real time, the decisions of dispatch and retirement of plants optimally, leaving expired the use of the economic merit list that causes serious deviations in the real costs of operation of the system, ranging from 20 to 50%, i.e., in the order of 8 to 20 MUSD, with respect to the proposed redispatch model. As for the convergence times for the different real case studies that the redispatch model was subjected to, they are in the order of 2 to 5 min compared to the long convergence times of the unit commitment models and the merit list, which range from 1 to 3 h in their execution. Unfortunately, the proposed redispatch model has shortcomings that can be improved as other authors propose modifications to the model. From the operational point of view, it is complex to visualize all the dynamic behavior of an electric system in terms of power flows, angle control, voltage regulation, and systemic inertia, which makes the proposed redispatch model premature in these technical aspects and in need of improvement. On the other hand, the ancillary services market is a parallel market to the energy market based on marginal costs. It is a challenge for future researchers to link the ancillary services market in real time to the redispatch model using the necessary active power reserves for frequency control and voltage control, as is the case of reactive power, taking advantage of the massive resource of solar-wind renewable generation. Finally, it can be stated that as solar-wind renewable generation continues to increase its generation capacity, most modern power systems in the world will have a decreasing capacity of rotational axis inertia and a deficit in the capacity of power reserves for frequency control. However, the proposed redispatch model replaces the traditional and inefficient economic merit list and the system operator can execute real-time dispatch and retirement decisions in an optimal way, leaving the use of the economic merit list, that causes serious deviations in real operating costs, out of date. Therefore, the future challenge of this work focuses on integrating these new markets of ancillary services into the redispatch model, where responsibility in the short term must be assumed by solar-wind generation to displace conventional thermal generation in order to ensure an effective energy transition worldwide. Conceptualization, K.B. ; methodology, K.B. ; validation, K.B. ; formal analysis, K.B. ; investigation, K.B. ; writing--original draft preparation, K.B. ; writing--review and editing, K.B. and D.W.; visualization, K.B. ; supervision, D.W. All authors have read and agreed to the published version of the manuscript. This research received external support and funding from Conicyt-Fondecyt 1221943 and Conicyt-FONDAP 1522A0006 (SERC Chile).