This work assesses the economic feasibility of replacing conventional peak power plants, such as Diesel Generator Sets (DGS), by using distributed battery energy storage systems (BESS), to implement Energy Time Shift during peak hours for commercial consumers, whose energy prices vary as a function of energy time of use (ToU tariffs).
Economic feasibility of replacing conventional peak power plants by using distributed (BESS). A commercial consumer connected to the MV network (Campinas/Brazil). Break-even point (BEP) for four battery technologies: OPzS; NiCd; Li-NCA; and FeCr. A reduction of 31%, 38% and 26% in the costs of OPzS, Li-NCA and FeCr makes the BESS viable.
The life cycle inventory for power plant construction and decommissioning is about 2 g-CO2/kWh with reference to the 505 MW CCGT plant evaluated in which can translate to 420.5 g-CO2/MWe by generating capacity. 3.4. Battery energy storage system A full-scale detailed LCA on BESS is out of the scope of this paper.
To reduce the peak thermal generation, the possibility of building pumped storage hydroelectric power plants is being considered. During the off peak generating hours, when surplus generation is available, the pumped storage plant will pump water to an upper reservoir, and then use this stored water for hydro generation during peak load hours.
A synergistic planning of and BESS could theoretically reduce the system level power generation capacity by 26% albeit a potential increase in the overall capital cost at the current cost of batteries. The projected battery cost reduction is critical in improving the feasibility of large-scale deployment. 1. Introduction
... Recently, Kotiuga et al. conducted a pre-feasibility study of a seawater pumped storage system and showed that a 1000 MW pumped storage plant, that could generate power for 8 h, would eliminate the need for 1000 MW thermal plants burning heavy fuel oil.