题目内容

The Nuon team in TU Delft designed a very fast car powered by solar energy, the Nuna 7. They just came back from the World Solar Challenge 2013 in Australia after winning the first place. But they are already looking for improving their car. As storage, they need a solution as light as possible.Looking at the Ragone plot here, which would be the preferred technology for the batteries of the new Nuna car?

A. Lead-acid batteries
B. Nickel or metal hydride batteries
C. Lithium batteries
D. Lithium-ion batteries

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Which of the following is NOT a secondary battery?

A. Zinc-carbon batteries
B. Lead-acid batteries
C. Nickel cadmium batteries
D. Lithium-polymer batteries

Which of the following statements is NOT true regarding the solar inverter topologies?

A. Module level (micro)inverters are better suited to get the maximum power out of each PV module than compared to central inverters, especially when there are partially shaded arrays.
B. String inverters ensure a higher yield than central inverters when there are partially shaded arrays.
C. String inverters ensure a higher yield than module level (micro)inverters when there are partially shaded arrays.
D. Module level (micro)inverters ensure a higher yield than string inverters when there are partially shaded arrays.

Which of the following is NOT a requirement for an ideal solar inverter?

A very high conversion efficiency
B. Detection and prevention capability against islanding
Continuing to supply power to the grid in the event of grid failure
D. A high lifetime
E. In-built MPP Tracking capability

Consider a typical I-V and P-V curve of a solar module as shown in the figure below.a) For any set of irradiance and temperature conditions, the PV module always has the \(P_{mpp} \gt V_{oc} \times I_{sc}\).b) The rest of the conditions remaining the same, if the irradiance falling on the PV module uniformly increases such that the new P-V curve has an MPP at \(P_{mpp}'\), then \(P_{mpp}' \gt P_{mpp}\).c) The rest of the conditions remaining the same, if the irradiance falling on the PV module uniformly increases such that the new P-V curve has an MPP at \(P_{mpp}'\), then \(P_{mpp}' \lt P_{mpp}\).d) For V=\(V_{mpp}\), \(\frac{dP}{dV} = 0\).Which of the above statements are true?

A. a) and b)
B. d) only
C. b) and d)
D. c) and d)

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