Implementability. Computational feasibility The larger the number of network areas considered, the larger the computational complexity. However, considering even thousands of nodes/areas should be possible, since it has been applied in other regions in the world (for instance in PJM1). Compatibility with existing regulation in Europe Implementing a system of prices that is in line with principles widely implemented in the Internal Energy Market (IEM) or European legislation, like zonal pricing, would face less opposition than schemes that are against these principles. Simplicity (Conceptual one) The simpler the functioning of a market is to understand, the more predictable its output will be, and, therefore, the easier its acceptance by parties will be. Implementation costs Costs of implementing a nodal network model may generally be higher than those of implementing a zonal one, since, for example, software used may need to change and the amount of information exchanged will increase substantially. Besides, implementing a zonal scheme where zones do not coincide with currently existing ones may require the change of the footprint of local power exchanges or aggregators, and the structure of the communication and control scheme adopted (generators and demand initially reporting to some control centre may start reporting and communicating with a new one). Experience with its implementation Authorities and systems tend to rely more easily on schemes that have been widely applied. Possible extension to several time frames (scalability, replicability) If possible, the system of prices devised (level of price differentiation by location) should be implementable not only in day-ahead markets, but also in other time frames (intraday, balancing energy, etc.).
Implementability. Implementability involves compatibility of the design alternatives with the Capacity Allocation and Congestion Management and the Balancing Network Codes, the simplicity of the market sequence, the implementation costs and also the experience with the implementation of a market in other systems.
Implementability. This relates to how easy the implementation of a market is, or the difficulties authorities and operators may face in its implementation and day-to-day functioning. There are several dimensions to the implementability of a market. They are discussed next: Computability Including very complex products can lead to problems extremely difficult to solve. Simplicity of the market Implementing very sophisticated and complex products may prove to over-complicate the bidding processes of the agents, while never perfectly fitting the exact needs of all particular cases. It is therefore generally accepted that a certain level of modelling approximation is adequate. Implementation time and costs Implementing radical changes or adding extra layers of complexity may require long time and high costs.
Implementability. Compatibility with existing regulation/principles and markets New (centralized) RES energy pricing schemes developed may face the opposition of parties willing to stick to already existing ones. Besides, the system of prices applied should, to the extent possible, not be against principles widely implemented in the IEM or European legislation, like marginal supply cost reflectivity. Relevance of barriers faced by RES operators for their participation in markets Unit size and players experience are also factors which have to be taken into account when considering the implementability of a specific scheme. Market access rules can prevent and make the implementation of a specific market based support policy difficult. The implementation of a specific mechanism could require further adaption of market rules and/or the emergence of new actors facilitating the trading or valorization of RES electricity. Level of use of funds from the public (State/local government) budget In some systems, mechanisms related to the adoption of clean technologies have been funded from the public budget. Under this criterion, the amount of funds provided by public authorities that are used to support RES generation should be as low as possible, since these public funds are scarce. The use of large amounts of public funds by a support mechanism may condition its acceptance by authorities. Cost efficiency The overall amount of funds provided to RES generation in the form of support payments should be the smallest one possible that is compatible with achieving the desired level of deployment of this generation.
Implementability. The technical and administrative feasibility of implementing each alternative are evaluated. Technical feasibility includes the difficulties associated with the construction of the remedy and the ability to monitor its effectiveness. For administrative feasibility, the availability of the necessary personnel and materials is evaluated along with potential difficulties in obtaining specific operating approvals, access for construction, institutional controls, and so forth.
Implementability. This criterion focuses on the technical feasibility and availability of the technologies that each alternative would employ and the administrative feasibility of implementing the alternative.
