47 lines
2.0 KiB
ReStructuredText
47 lines
2.0 KiB
ReStructuredText
..
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SPDX-FileCopyrightText: 2019-2020 The PyPSA-Eur Authors
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SPDX-License-Identifier: CC-BY-4.0
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##################
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Cost Assumptions
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##################
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The database of cost assumptions is retrieved from the repository `PyPSA/technology-data <https://github.com/pypsa/technology-data>`_ and then saved to``resources/costs.csv``. Cost assumptions of previous PyPSA-Eur versions can be restored by setting in the ``Snakefile``: ``COSTS="data/costs.csv".
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The ``config.yaml`` provides options to choose a reference year (``costs: year:``) and use a specific version of the repository ``costs: version:``.
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It includes cost assumptions for all included technologies for specific
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years from various sources, namely for
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- discount rate,
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- lifetime,
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- investment (CAPEX),
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- fixed operation and maintenance (FOM),
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- variable operation and maintenance (VOM),
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- fuel costs,
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- efficiency, and
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- carbon-dioxide intensity.
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The given overnight capital costs are annualised to net present costs
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with a discount rate of :math:`r` over the economic lifetime :math:`n` using the annuity factor
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.. math::
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a = \frac{1-(1+r)^{-n}}{r}.
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Based on the parameters above the ``marginal_cost`` and ``capital_cost`` of the system components are calculated.
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.. note::
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Another great resource for cost assumptions is the `cost database from the Danish Energy Agency <https://ens.dk/en/our-services/projections-and-models/technology-data>`_.
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Modifying Cost Assumptions
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==========================
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Some cost assumptions (e.g. marginal cost and capital cost) can be directly overwritten in the ``config.yaml`` (cf. Section :ref:`costs_cf` in :ref:`config`).
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To change cost assumptions in more detail, modify cost assumptions directly in ``resources/costs.csv`` as this is not yet supported through the config file.
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You can also build multiple different cost databases. Make a renamed copy of ``resources/costs.csv`` (e.g. ``data/costs-optimistic.csv``) and set the variable ``COSTS=data/costs-optimistic.csv`` in the ``Snakefile``.
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