Reconfigurable and flexible voltage control strategy using smart PV inverters with integrated energy storage for advanced distribution systems

Autor: Mahfuz A. Shuvra, Badrul Chowdhury
Jazyk: angličtina
Rok vydání: 2019
Předmět:
energy storage
power generation control
power grids
distributed power generation
battery storage plants
photovoltaic power systems
invertors
overcurrent protection
power distribution faults
voltage control
distribution networks
power distribution control
reconfigurable
flexible voltage control strategy
smart pv inverters
integrated energy storage
advanced distribution systems
circuit topology
utility-owned photovoltaic inverters
integrated battery energy storage system
state-of-the-art configurations
tight voltage regulation
bess maintenance
solar-storage system
high penetration induced voltage fluctuation
added advantage
inverter size
high ramp
solar irradiance variation
local voltage regulation
permissible range
modified ieee 33 bus medium voltage distribution network
multiple inverters
Electrical engineering. Electronics. Nuclear engineering
TK1-9971
Zdroj: IET Smart Grid (2019)
Druh dokumentu: article
ISSN: 2515-2947
DOI: 10.1049/iet-stg.2019.0018
Popis: A novel circuit topology is proposed for utility-owned photovoltaic (PV) inverters with integrated battery energy storage system (BESS) and compared to two state-of-the-art configurations. The proposed topology offers flexibility and can be applied to a range of distribution networks for tight voltage regulation. During BESS maintenance, the solar-storage system reconfigures itself for a self-run mode of operation, and actively compensates high penetration induced voltage fluctuation without activating overcurrent protection of the inverter, which is an added advantage of this strategy. This advantage is achieved by slightly increasing the inverter size to reserve a portion of inverter's current-carrying capability. A dynamic model of the new configuration is also developed to analyse its performance in providing fast response for high ramp up/down solar irradiance variation. As the proposed control strategy is implemented at the device level, the local voltage regulation is quite guaranteed to be in the permissible range. Results from the analysis performed on a modified IEEE 33 bus medium voltage distribution network with multiple inverters show evidence that the proposed strategy has the potential to mitigate voltage fluctuation in several extreme cases.
Databáze: Directory of Open Access Journals
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