Flow-Oriented Dynamic Time Warping for Characterizing Temporal Relationships in PV Building Energy Flows
Artykuł w czasopiśmie
MNiSW
140
Lista 2024
| Status: | |
| Autorzy: | Piasecka Izabela, Piotrowska Katarzyna, Gryniewicz-Jaworska Michalina, Małek Arkadiusz |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2026 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 18 |
| Wolumen/Tom: | 19 |
| Numer artykułu: | 4283 |
| Strony: | 1 - 33 |
| Impact Factor: | 3,9 |
| Web of Science® Times Cited: | 0 |
| Scopus® Cytowania: | 0 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | TAK |
| Licencja: | |
| Sposób udostępnienia: | Witryna wydawcy |
| Wersja tekstu: | Ostateczna wersja opublikowana |
| Czas opublikowania: | W momencie opublikowania |
| Data opublikowania w OA: | 10 września 2026 |
| Abstrakty: | angielski |
| Understanding how photovoltaic generation is distributed between local use, surplus export, and grid import requires analysis of the temporal structure of individual energy flows rather than only aggregate PV-load matching. This study proposes a flow-oriented Dynamic Time Warping (DTW) framework based on three physically interpretable relationships: self-consumption versus PV production (SC-PV), surplus export versus PV production (EXP-PV), and grid import versus total consumption (IMP-LOAD). The method was applied to 30 complete 24-h profiles recorded at 15-min resolution in a university building equipped with a 49.7 kWp rooftop PV system. SC-PV exhibited the lowest median normalized DTW distance (DTW* = 0.0186), EXP-PV the highest (0.4468), and IMP-LOAD an intermediate value (0.2323) with the greatest day-to-day variability. The differences among the three components were highly significant (Friedman X-2(2)=54.60, p<0.001 , Kendall's W = 0.91). Direct comparison with conventional PV-LOAD DTW* showed markedly different day-by-day associations for SC-PV (rho = -0.523), EXP-PV (rho = -0.006), and IMP-LOAD (rho = -0.760), demonstrating that a single PV-LOAD distance does not retain the flow-specific information captured by the proposed representation. Cross-correlation provided complementary evidence, with a median optimal lag of zero for all three flow pairs. The proposed framework therefore provides a compact diagnostic representation of local PV utilization, surplus formation, and residual grid dependence without implying causal relationships. |
