Variable Final Energy [by Sector]|Natural Gas gets negative

[maxnutz]

Problem:

• In current network, the variable of Final Energy [by Sector]|Natural Gas is much too low.
• The variables value gets negative for future years. This is not realistic. Final Energy - variables must stay positive. Ever.
• changing the pypsa-input changes the variables value strongly.

model	scenario	region	variable	unit	version	2025	2030	2040	2050
Pypsa-AT v1.0	var-gas-imports	Austria	Final Energy [by Carrier]|Coal	TJ	1	68215.392	47241.936	6702.768
Pypsa-AT v1.0	var-gas-imports	Austria	Final Energy [by Carrier]|District Heat	TJ	1	70186.641208776	75804.582955824	113484.708164916	89301.81504996
Pypsa-AT v1.0	var-gas-imports	Austria	Final Energy [by Carrier]|Electricity	TJ	1	244715.06160486	266833.000827	348948.24896898	390207.451451508
Pypsa-AT v1.0	var-gas-imports	Austria	Final Energy [by Carrier]|Natural Gas	TJ	1	74637.4400581576	11809.424434918	-72728.5302362543	-92816.0648473342
Pypsa-AT v1.0	var-gas-imports	Austria	Final Energy [by Carrier]|Oil	TJ	1	274374.985943145	268982.958171872	76253.9936415593	2959.24219486929

The comparison-value of the energy balance for 2020 is:
Final Energy [by Carrier]|Natural Gas 1.96259 e5 TJ

Networks to use for testing

use the following networks (to be set in the config-files parameter 'network_results_path`:

• /home/maxnutz/Documents/pypsa-at-validation/pypsa-validation_processing/resources/AT_KN2040
• /home/maxnutz/Documents/scripting/nora_outputs/electricity-network-0p3/AT_KN2040
  The second path contains the newer version of pypsa-at and is therefore of greater importance

Tasks:

• Inspect the statistics-function: How can the output of this variable be negative?
• are there reasoning errors in the code?
• What adaptions would you propose?
• write the results of your investigation as comment into this issue. If a comment is not possible, then directly edit the description with the results of your investigation.