## 5 Simulation Results and Discussion
### Simulation Results for the Semi-Urban Network  
The reduction in _SAIDI_, _ENS_, and _COST_ indicators due to implementing the considered options is shown in Figures 5 and 6 for the semi-urban network. Two figures are provided to represent different value ranges of the indicators. Based on the obtained results (Figures 5 and 6), the following list presents the reduction in the _SAIDI_ and _ENS_ indicators, sorted in descending order from the highest to the lowest reduction, for the considered options in the semi-urban network:  
1. Construction of new lines L1, L2, and L3;
2. Replacement of old CBs;
3. Installation of remotely operated disconnectors with fault indicators; and
4. Replacement of old disconnectors and fuses. This sequence also applies to the reduction order of the _COST_ indicator, although some individual options within items 1 and 2 of the previous list do not strictly follow this order. In the case of the _COST_ indicator, the impact of the location of commercial and industrial consumers within the network is more pronounced, leading to a preference for improvement strategies applied to their feeders. This is most noticeable in the greater reduction in the _COST_ indicator when replacing CB7 at the beginning of Feeder 7. Tables 9-11 display the selection of investment options for minimizing _SAIDI_, _ENS_, and _COST_ in the semi-urban network, respectively. The results are presented for all four analyzed maximum available funds. Each of these tables, in addition to the selected investment options, also presents the available and allocated funds. The values of _SAIDI_, _ENS_, and _COST_ indicators for the baseline scenario and after applying minimization are presented in Table 12 for the semi-urban network. Figure 5: Reduction in the reliability indicators for the considered options in the semi-urban network—Part 1. \begin{table}
\begin{tabular}{c c c} \hline \hline \multirow{2}{*}{**Available Fund**} & **Allocated Fund** & **Selected Investment Options** \\ \hline  & & CB2, CB5, CB7, CB9, TS5-D1, TS5-D2, TS5-D-F, TS6-D1, TS6-D2, TS6-D-F, TS7-D1, TS7-D2, TS7-D-F, TS17-D1, TS17-D-F, TS18-D1, TS18-D-F, TS19-D1, TS19-D2, TS19-D-F, TS20-D2, TS20-D-F, TS21-D1, TS22-D2, TS23-D-F, TS33-D1, TS33-D2, TS33-D-F, TS35-D1, TS35-D2, TS35-D-F, L1-new, L2-new \\ \hline EUR 200,000 & EUR 200,000 & CB2, CB5, CB7, CB9, TS5-D1, TS5-D2, TS33-D1, TS33-D2, L1-new, L3-new \\ \hline EUR 200,000 & EUR 20,000 & CB5, CB7, TS33-D1, TS33-D2, L1-new \\ \hline \hline \end{tabular}
\end{table} 
Table 10: Selected investment options for \(ENS\) minimization for the semi-urban network model. Figure 6: Reduction in the reliability indicators for the considered options in the semi-urban network—Part 2. \begin{table}
\begin{tabular}{c c c} \hline \hline \multirow{2}{*}{**Available Fund**} & **Allocated Fund** & **Selected Investment Options** \\ \hline  & & CB2, CB5, CB7, CB9, TS5-D1, TS5-D2, TS5-D-F, TS6-D1, TS6-D2, TS6-D-F, TS7-D1, TS7-D2, TS7-D-F, TS17-D1, TS17-D-F, TS18-D1, TS18-D-F, TS19-D1, TS19-D2, TS19-D-F, TS20-D2, TS20-D-F, TS22-D2, TS27-D-F, TS33-D1, TS33-D2, TS33-D-F, TS35-D2, TS35-D-F, L1-new, L2-new \\ \hline EUR 200,000 & EUR 200,000 & CB2, CB5, CB7, CB9, TS5-D1, TS5-D2, TS33-D1, TS33-D2, L1-new \\ \hline EUR 20,000 & EUR 20,000 & CB5, CB7, TS33-D1, TS33-D2, L1-new \\ \hline \hline \end{tabular}
\end{table} 
Table 9: Selected investment options for \(SAIDI\) minimization for the semi-urban network model. The ratio of the benefits of improving the reliability indicator \(COST\) (\(\Delta COST\)) to the invested DSO funds for the considered options is calculated for each considered investment option:  
\[Ratio_{i}=\Delta COST_{i}/\text{C}_{inrop\_i}\ [1/yr], \tag{8}\]  
where \(\Delta COST_{i}\) is the improvement of the \(COST\) indicator for option \(i\), and \(C_{inrop\_i}\) is the investment option cost (Table 7). By calculating \(Ratio_{i}\) (8), a value is obtained that indicates the annual reduction in economic losses for each unit of money invested in the considered option \(i\).