Dynamic Power Balancing Algorithm for Single-Phase Energy Storage Systems in LV Distribution Network with Unbalanced PV Systems Distribution

TL;DR

This paper introduces a distributed clustering algorithm that uses single-phase battery storage to dynamically balance power in LV distribution networks with high PV penetration, reducing neutral current and voltage issues.

Contribution

It presents a novel distributed clustering approach for dynamic power balancing using single-phase batteries in LV networks with unbalanced PV systems.

Findings

Reduces neutral current and voltage rise.

Efficient clustering of households for power exchange.

Improves power quality in LV distribution systems.

Abstract

Unbalanced power, due to high penetration of single-phase PV rooftops into a four-wire multi-grounded LV distribution system, can result in significant rise in the neutral current and neutral voltage. This preprint proposes a distributed clustering algorithm for dynamic power balancing, using single-phase battery storage systems distributed in the LV distribution system, in order to reduce the neutral current and neutral voltage rise. The distributed clustering algorithm aggregates households connected to the same phase into clusters. Within each cluster, another distributed clustering algorithm is applied to calculate the total grid power exchanged but the corresponding phase. Then, the dynamic power balancing control is applied to balance the powers at the bus, based on battery storage systems' charge/discharge constraints, power minimization and willingness of the households to participate in the power balancing control.