## 3 DSM Use Case  
### Use Case Description  
The Use Case to be examined is entitled: \"Load Management Based on Demand Response/Demand Side Management\". For accomplishing load management through DR/DSM, a system comprising of at least one energy provider, one energy management actor and some end-users is required. The consumption of end-users is monitored through the smart meter readings sent regularly to the energy provider. This monitoring is performed at an aggregator level, meaning that the energy provider is mostly interested in the consumption as a whole from all consumers. It should also be noted that all end-users have the contracted power. In order to draw useful conclusions about consumption behaviours, the monitoring should be done for a specific time period that would allow for the observation of periodical trends on behalf of the consumers. In order to avoid peaks in the overall load demand, load shifting is decided and planned. Further on, messages are sent to the end-users through an application inviting them to take part in the DR/DSM program. In case of a positive feedback, an actor like an energy service company takes control of certain domestic electrical devices programming their functionality. The energy provider monitors the new situation and conclusions are drawn with respect to the actions taken. This use case can be examined for interoperability purposes in case a new end-user (new smart meter) is integrated in the system. The system should operate the same with the old and the new end-user(s). As a first step, we need to identify the actors that are involved in this use case and the interactions between them. For this scope, we have decided to entail as many actors as possible that would depict a real system in the most possible accurate way and information from reference [41] has also been taken into account. The list of actors is shown in Table 1.  
\begin{table}
\begin{tabular}{p{56.9 pt} p{113.8 pt} p{113.8 pt} p{113.8 pt}} \hline \hline
**Actor Name Selection List** & **Actor Type** & **Actor Description, [18]** & **Further Information Specific to This Use Case** \\ \hline Actor A & External Actor & External actor (Smart Grid Market Role) interacting with the system functions and components in the home or home automation network through the energy management communication channel. Examples of such market roles are the Energy Servicey Provider, the aggregator, etc. & In this UC the external actor can be an energy service company or an aggregator \\ \hline Actor B & External Actor & External actor (Smart Grid Market Role) interacting with the system functions and components in the home or home automation network through the metering communication channel. This actor is responsible for collecting metering data. Examples of such market roles are the DSO, metering company, etc. & In this UC the external actor is the energy provider \\ \hline Meter Data & & The Home customer in agriculture users) may also be involved in contract-based DR/DSM. & The Home customer in this Case decides whether or not to participate in the DR/DSM program \\ \hline Meter Data & & The Home customer in agriculture users) may also be involved in contract-based DR/DSM. & This UC the external actor is the energy provider \\ \hline Meter Data & & The Home customer in agriculture users) may also be involved in contract-based DR/DSM. & This Case decides whether or not to participate or not to participate in the DR/DSM program \\ \hline Meter Data & & The Home customer in agriculture  
The interactions between the aforementioned actors are shown in the Message Sequence Chart (MSC), which is displayed in Figure 3. As it can be observed, smart meter readings are sent to the data concentrator (NNAP) and subsequently they are forwarded to the HES and the MDMS, where the user consumption profile data is extracted. Actor A controls the metering channel, thus it is the point where elaborated smart meter data forming the user consumption profile are collected.