Tese
Controle e supervisão de fonte ininterrupta de energia híbrida
Fecha
2017-02-13Autor
Tibola, Jonas Roberto
Institución
Resumen
This work presents contributions to the modeling, control and management of an
hybrid uninterrupted power supply (UPS) based on Otto cycle power generator set and
lead acid battery bank. The proposed configuration is called hybrid due to the presence
of two energy storage elements: i) the fuel fed the Otto cycle internal combustion engine
(ICE) of the generator set and ii) a lead acid battery bank, which can be recharged from
the grid or from the generator. With the hybridization it is possible to add up the advantages
of UPS’s such as uninterrupted power supply and high output energy quality with
the advantages of power generator sets, such as high autonomy and lower installation cost
for high autonomy. In addition, with the hybrid topology it is possible to explore degrees
of freedom that do not exist in the independent configurations, such as: i) variable
speed operation and ii) start-stop operation of the MCI in order to reduce consumption/
emissions in lower loads, (iii) use of Otto cycle engine with lower cost in relation to
a Diesel ICE. The hybrid UPS is composed of an Otto cycle internal combustion engine
(ICE), a three-phase/three-wire rectifier, which can be connected via contactors to the
grid, or to the permanent magnet synchronous generator (PMSG), a battery bank connected
to the DC bus through a bi-directional boost converter, and a three-phase/four-wire
inverter at the output. Experimental results are provided indicating that variable speed
operation can achieve a reduction of up to 32% in specific fuel consumption, depending
on the load range. For start-stop operation, the reduction in specific fuel consumption
can reach up to 39%, depending on the load range.