Add Certificate

This script, add_certificate.py, is a specialized script developed for the Google-GO project within the PyPSA-Eur workflow. It is designed to integrate Guarantee of Origin (GO) certificates into energy system models. It essentially creates "virtual" representations of power plants and storage units, and sets up a market for these certificates within the PyPSA network.

Here's a breakdown of its main functions, categorized by their roles:

  • Functions for Filtering and Binding with GO Market:

    • get_virtual_ppl_dataframe: Constructs a DataFrame that defines virtual power plants (VPPs) by grouping real power plant units (generators and links) based on certificate criteria. This information is used both here and for constraints in solve_network.py.
    • get_virtual_storage_dataframe: Identifies real storage units and their associated charger/discharger links, grouping them into virtual storage systems for certificate tracking. This information is used both here and for constraints in solve_network.py.
    • get_go_background_demand: Generates a background Guarantee of Origin (GO) electricity demand profile for each country based on historical AIB statistics.

  • Functions for Creating the GO Layer:

    • add_virtual_carriers: Adds "virtual" carriers to the PyPSA network, which are duplicates of existing carriers used for tracking certificate flows.
    • add_virtual_ppl: Adds virtual power plants to the PyPSA network as aggregate virtual generators and creates corresponding virtual buses.
    • add_demand: Adds GOs demand to the PyPSA network by creating new buses and loads representing the certificate demand.
    • add_go_market: Establishes a market bus for Guarantees of Origin, connecting GO supply and demand buses.
    • add_virtual_storage: Adds virtual storage units to the PyPSA network as virtual generators, connected to national "GO Market" buses.

  • Supporting Functions:

    • get_geo_center: Computes the geographic center (centroid) of countries or regions from a shapefile, used for placing virtual buses on a map.
    • extract_AIB_statistics: Downloads, processes, and exports electricity cancellation statistics from the AIB's dataset.
    • retrieve_ci_load: Retrieves industrial and commercial electricity load data.
    • get_load_demand: Extracts and processes electricity load demand from the PyPSA network.

The script's overall workflow involves:

  1. Virtual Carrier Addition: Adds "GOs" as a carrier and creates virtual carriers based on plant groupings.
  2. Virtual Power Plant Creation: Groups real generators and links into virtual power plants and adds them to the network.
  3. Demand Integration:
    • If enabled, calculates and adds "background" GOs demand using AIB statistics and creates a corresponding market.
    • If enabled, calculates and adds "new" GOs demand based on load profiles and creates a corresponding market.
  4. Virtual Storage Integration: If national scope demands are enabled and storage carriers are defined, groups real storage units into virtual storage and adds them to the network.

Essentially, this script extends a standard PyPSA energy model to include the complexities of a Guarantee of Origin certificate system, allowing for the simulation and analysis of certificate trading and its impact on the energy system.