An embedded interactive monitoring system for PV-Diesel - download pdf or read online

By Boonyang Plangklang.

ISBN-10: 3899581288

ISBN-13: 9783899581287

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20 Chapter 2: PV-Diesel hybrid system technology For the quasi-static processes, a capacitor Cp, which is connected in parallel to a resistor Rp, disappears. This derived model corresponds to the Shepherd model, which is perhaps the most spread model worldwide [8]. An additional loss in the battery is due to self-discharge, which is represented by a resistor RS (Fig. 2-15). This resistance is responsible for the emptiness of charged batteries after they are left for so long although they are never in use.

System losses define systematic energy losses that are due to the physical properties of the system components or the entire installation. Energy conversion losses or DC power line losses constitute important contributions to this category. 1 Capture losses Capture or irradiation losses translate the fact that only part of the incoming irradiation is used for energy conversion. The losses are classified as follows: • Shading losses Losses due to shading correspond to the reduced energy received by a shaded module or array with respect to the un-shaded one under otherwise identical conditions.

For an infinitely large load resistance (open circuit), the output current is then zero (Icell = 0) and thus the entire photocurrent flows through the internal diode (point 4 in Figure 2-8). The open-circuit voltage Voc can be therefore derived again from (2-2). 65 ⋅ 10-5 eV/K] T = absolute temperature [K] The quantity I 0 defines the so-called dark- or saturation current of a diode. It plays a very large role of the performance of a solar cell. 9 V for amorphous cells. Power of a solar cell is the product of current and voltage (I-V) and can be described in a curve as shown in Figure 2-9.

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An embedded interactive monitoring system for PV-Diesel hybrid plants in rural areas by Boonyang Plangklang.

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