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Christian Brosig, Eberhard Waffenschmidt,
"Energy autarky of households by sufficiency measures",
10th International Renewable Energy Storage Conference (IRES 2016), Düsseldorf, 15.-17.3.2016.

A consciousness about being independent from energy suppliers is spreading due to several reasons. Many authors already analyzed PV battery systems with a focus on the grade of autarky and self-consumption. But what if someone really wants to be autarkic? How could this person influence the personal grade of satisfaction and with what does the person have to cope with?
To quantify these questions, a new parameter is introduced: the sufficiency indicator. It describes the qualitative rate of self-sufficiency and involves personal ratings of devices. It is expected to express the user's contentment and two measures are identified to maximize it: shifting of loads and prioritized shutdown of devices. As contentment is a very personal value, a survey was conducted, where 150 people indicated their personal values bound to devices and their ability to shift their use. They are classified into groups of standard households. These households are simulated as PV battery systems taking load shift and prioritized shutdown into account. The results are used to characterize the sufficiency indicator, to visualize abandonment and to expose the potentials of the sufficiency measures.
As a conclusion, the sufficiency indicator can be proved as meaningful to visualize how sufficiency measures affect the contentment of the household. Shifting of devices does not always lead to more contentment, as important devices, such as lighting, cannot be shifted. Prioritized shutdown brings more contentment, but reduces the grade of self-sufficiency in general.

The publication is based on the Master Thesis of Christian Brosig.

> Pre-print of the proceding: PDF-Document (1.3 MB)

Load profile (top) and renunciation (bottom, energy which is missed) of a typical household.with PV system and battery storage. The PV generates the amount of yearly needed energy and the battery can store halve of the average daily demand. The horizontal axis corresponds to the day of the year and the vertical axis to the hour of the day. The color indicates the related value.

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Letzte Änderung: E. Waffenschmidt, 23. März 2016