Integrid - Bridging the Gap

33 Results from HLUC05 - Manage the impact of flexibility activation from resources connected to the distribution network The sequence diagrams shown in Figures 4.12 and 4.13 describe the execution of HLUC5 in both time periods – day-ahead (evaluations are performed every hour until gate closure; the time frame of the evaluations are the 24 hours of the next day) and intraday (the evaluation is made upon request (directly after an mFRR bid activation by the TSO) for the time of the activation). The demonstration of HLUC05 considered eight test scenarios, divided into both evaluation modes (day-ahead and intraday). Test scenarios #1 and #2 considered normal network operation configuration, with real flexibility fromDER engaged for the project. Taking into account the flexibility resources available in the Mafra MV network, no grid constraints were detected in these test scenarios, as can be seen in the KPI results in Table 4.4. The following metrics were calculated as a result of the HLUC05 demonstration. Table 4.5 shows the KPI results for test scenarios #1 and #2. A brief description is also provided. Figure 4.14 – TLS assessment pre-results (test scenarios #3 and #4) Table 4.4 - UC5 KPIs and description KPI Result Description Average flexibility quantity accepted 81.64% In ex-ante mode, the Commercial VPP sends multiple bids before gate closure. A number of them are curtailed. At gate closure the Commercial VPP sends its final bids. This KPI quantifies the (average) ratio of flexibility volume (MW) accepted in the final bids by considering the volumes of the bids sent before gate closure. Flexibility program changes 5.61 The Commercial VPP sends multiple bids before gate closure, sometimes varying the composition of the flexibility bids. This KPI quantifies how often per day (on average) bid compositions change. Average flexibility quantity flagged yellow and red per network area 0% The percentage of bid volume which is rejected in the ex-ante evaluation. Non-fulfilled balancing energy based on grid problems 0% In pre-activation mode, TLS evaluates all the bids before an activation is carried out. As such, TLS can curtail flexibilities which could lead to grid problems. This KPI gives the (average) ratio of volume which cannot be activated because it would lead to grid problems. Amount of curtailed flexibility 0 MW Similar to the KPI “Non-fulfilled balancing energy based on grid problems” but the result is in MW instead of percent. Number of problems avoided in the distribution grid by traffic light system 0 Counts how often bids in an activation had to be curtailed due to flexibilities which could have led to grid problems. Figure 4.12 – Testing Sequence Diagram for Demonstration – Day-ahead (Ex-ante). Figure 4.13 – Testing Sequence Diagram for Demonstration – Intraday (Pre-activation).