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Microgrid solutions for insular power systems in the outback of Australia

Markovic M., Nedic Z., Nafalski A.

Maszyny Elektryczne : zeszyty problemowe

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2016

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Nr 1 (109)

103--107

EN

In countries, such as Australia, with often vast distances between settlements and the mains Power grid, insular power systems are the only solution. The most common of them is diesel generation that is relatively inexpensive, however it can have long term financial and environmental implications such as a large production of green house gases (GHGs). In the paper on an example of a remote water pump station, we compare microgrids of diesel generation only, combination of it with solar generation and an addition to the latter of a battery storage. It is demonstrated that addition of renewable energy to diesel generation can be a viable alternative for insular power systems, resulting in drastic reduction of diesel fuel consumption, emission of GHGs and reduction of total operating and maintenance costs.

PL

W krajach takich jak Australia, często ogromne odległości między osiedlami i siecią elektroenergetyczną, wyspowe systemy zasilania są jedynym rozwiązaniem. Najczęstszym z nich jest generator Diesla, który jest stosunkowo tani, jednak może mieć długoterminowe skutki finansowe i środowiskowe, takie jak duża produkcja zielonych gazów (GHG). W artykule porównano, na przykładzie stacji zdalnej pompy wodnej mikrosieci generację silników wysokoprężnych, połączonych z instalacją solarną oraz systemem baterii do przechowywania energii. Wykazano, że oddanie energii odnawialnej do układu napędowego może być realną alternatywą dla wyspiarskich systemów energetycznych, w wyniku drastycznego zmniejszenia zużycia oleju napędowego, emisji gazów cieplarnianych i zmniejszenia całkowitych kosztów eksploatacji i utrzymania.

2

Study of environmental and economical effects of using electric vehicles

Pirgousis C.T., Nafalski A., Nedic Z., Göl Ö.

Maszyny Elektryczne : zeszyty problemowe

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2009

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Nr 81

107-111

EN

Carbon dioxide emissions from fossil fuels have a lasting detrimental effect on the environment, compounding the green house emissions. The transport industry is a major contributor to the problem; more specifically private transportation in the form of internal combustion engine (ICE) driven motor vehicles. Electric vehicles (EVs) are being considered as a promising alternative, but they will have an effect on the infrastructure they rely on, namely “the grid”. This paper discusses and analyses this effect. The load forecast is based on the energy consumption of a concept car developed by the University of South Australia (UniSA), code-named TREV (Two-seater Renewable Energy Vehicle). The paper gives a brief overview of TREV and estimates the impact of adopting such an electric vehicle on the environment in terms of the reduction in carbon released due to the replacing ICE vehicles.

3

Regenerative braking in an electric vehicle

Cody J., Göl Ö., Nedic Z., Nafalski A., Mohtar A.

Maszyny Elektryczne : zeszyty problemowe

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2009

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Nr 81

113-118

EN

Electric vehicles have been attracting unprecedented attention in light of the volatile market prices and prospect of diminishing supplies of fuel. Advances in battery technology and significant improvements in electrical motor efficiency have made electric vehicles an attractive alternative, especially for short distance commuting. This paper describes the application of Brushless DC (BLDC) motor technology in an electric vehicle with special emphasis on regenerative braking. BLDC motors are being encountered more frequently in electric vehicles due to their high efficiency and robustness; however a BLDC motor requires a rather complex control to cope with the reversal of energy flow during the transition from motoring regime to regenerative braking. In an electric vehicle, regenerative breaking helps to conserve energy by charging the battery, thus extending the driving range of the vehicle. There is a number of different ways to implement regenerative braking in a BLDC motor. This paper describes the Independent Switching scheme for regenerative braking [1] as applied to a developmental electric vehicle at the University of South Australia.