Lernkarten

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Sprache Deutsch
Stufe Universität
Erstellt / Aktualisiert 13.02.2021 / 04.03.2021
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Power distribution unit

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Power regulation & distribution function

Regulate the bus voltage to the required voltage level

- Regulate the power output (voltage and current) from solar cells and energy storage systems

- Regulate the voltages during charging of energy storage systems

Provide direct current (DC)or alternating current (AC)

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pro cons DC / AC

DC

Low power demands

Low transmission distances

 

AC

High power demands

High transmission distances

 

Batteries, fuel cells, solar cellsproduce direct current(DC)

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Power conditioning & control - 2 types

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PPT - explanation

When a load is directly connected to the solar panel, the operating point of the panel will rarely be at peak power. The impedance seen by the panel determines the operating point of the solar panel. Thus by varying the impedance seen by the panel, the operating point can be moved towards peak power point. Since panels are DC devices, DC-DC converters must be utilized to transform the impedance of one circuit (source) to the other circuit (load). Changing the duty ratio of the DC-DC converter results in an impedance change as seen by the panel. At a particular impedance (i.e. duty ratio) the operating point will be at the peak power transfer point. The I-V curve of the panel can vary considerably with variation in atmospheric conditions such as irradiance and temperature. Therefore, it is not feasible to fix the duty ratio with such dynamically changing operating conditions.

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Full energy source overview

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ISS m2 of solar and power

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3000 m² - 250 kW

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photo efficiency lab vs final

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which photocell types are primarily used in space

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