The traditional neutral voltage problem in
low-voltage (LV) four-wire multigrounded distribution networks
can be aggravated due to an unbalanced allocation of one-phase
photovoltaic (PV) units. Inherent limitations restrict the performance
of the traditional strategies to mitigate the combined
effect of load and PV unbalance. To overcome the shortcoming
of traditional approaches, a new dynamic mitigation approach
using community energy storage (CES) is proposed in this paper.
A power balancing algorithm is developed to perform the balancing
operation while minimizing power drawn from the CES.
A charge/discharge control strategy is developed that will continuously
balance and dynamically adjust the power exchange
with the grid in a real time, and mitigate the neutral current
and neutral voltage rise. To investigate the applicability of the
proposed approach under physical time delays associated with
battery and PV systems, a suitable dynamic model is developed.
An Australian LV distribution system is used to verify the proposed
approach under daylong variations of load and PV, and
also during short-term variations of PV output caused by cloud