Multi-Objective Advanced Inverter Controls to Dispatch the Real and Reactive Power of Many Distributed PV Systems.

Abstract

The research presented in this report compares several real-time control strategies for the power output of a large number of PV distributed throughout a large distribution feeder circuit. Both real and reactive power controls are considered with the goal of minimizing network overvoltage violations caused by large amounts of PV generation. Several control strategies are considered under various assumptions regarding the existence and latency of a communication network. The control parameters are adjusted to maximize the effectiveness of each control. The controls are then compared based on their ability to achieve multiple objectives. These objectives include minimizing the total number of voltage violations, minimizing the total amount of PV energy curtailed or reactive power generated, and maximizing the fairness of any control action among all PV systems. The controls are simulated on the OpenDSS platform using time series load and spatially-distributed irradiance data.

Optimal Parameters of Volt–Var Function in Smart Inverters for Improving System Performance

“…Feeder #1 has a short range with urban, feeder #2 has a medium range and feeder #3 has a long range feeder with rural. The power conditioning system (PCS) capacity for modelling in the PV was set differently from case to case, but this model assumes a 10% margin [29,30,32]. The installation location of the PV was assumed to be the end of the long range feeder (Feeder #3) where the over-voltage problem occurs first before other location [9,33].…”

“…Further, the improvement of the proposed method was limited due to only using standard settings. References [29,30] analyzed five different inverter control strategies for differing objective functions. Further, these papers analyzed the output reduction effect of the active power due to the reactive power control.…”

Προσομοίωση Σε Πραγματικό Χρόνο Επιδράσεων Διεσπαρμένης Παραγωγής Σε Δίκτυα Διανομής Με Χρήση Ψηφιακών Μοντέλων Και Πραγματικού Εξοπλισμού

“…Τυπική Q(V) χαρακτηριστική: σημειώνονται τα σύμβολα VQ min , VQDB neg, V n , VQDB pos , VQ max Σχήμα 3.7. Ενδεικτική P(V) χαρακτηριστική [68] Σχήμα 3.8. Απλοποιημένο διάγραμμα βαθμίδων ανοιχτού βρόχου του Q(V) ελεγκτή αντιστροφέα Σχήμα 3.9.…”

“…Τυπική Q(V) χαρακτηριστική: σημειώνονται τα σύμβολα VQ min , VQDB neg, V n , VQDB pos , VQ max max Σχήμα 3.7. Ενδεικτική P(V) χαρακτηριστική[68] Ο συντονισμένος έλεγχος τάσης μπορεί να είναι κεντρικός ή αποκεντρωμένος. Στον κεντρικό έλεγχο, ένας κεντρικός ελεγκτής λαμβάνει μετρήσεις από διάφορους ζυγούς, εκτελεί κατάλληλο αλγόριθμο (π.χ.…”