Fix optimizedAddCap of non-dispatchable sources

[SabineHaas]

Fix #446,
Fix #461,
Fix #2

Changes proposed in this pull request:

• Fix optimizedAddCap of non-dispatchable sources: multiply maximumCap by max(timeseries(kWh/kWp)) to fix issue maximumCap is equal to peak_flow and not optimizedAddCap  #446 --- see Fix optimizedAddCap of non-dispatchable sources #562
• - timeseries_normalized are calculated for all timeseries of non-dispatchable sources now (before only if optimizeCap==True) see Fix optimizedAddCap of non-dispatchable sources #562
• Add check for the time series of non-dispatchable sources (error message if they do not have values between 0 and 1) (fix Input timeseries effect on output #461)
• Add requirement for non-dispatchable sources to readthedocs
• Fix inverter capacity, see Investment capacities directly connected to Sources #2

The following steps were realized, as well (if applies):

• Use in-line comments to explain your code
• Write docstrings to your code
• For new functionalities: Explain in readthedocs
• Write test(s) for your new patch of code
• Update the CHANGELOG.md
• Apply black (black . --exclude docs/)
• Check if benchmark tests pass locally (EXECUTE_TESTS_ON=master pytest)

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[SabineHaas]

@smartie2076 for the plans/status see "Changes proposed in this pull request:" and previous commits.

[Bachibouzouk]

@SabineHaas, the structure of files has changed, you will have to copy-paste your changes in the new C files located under src/mvs_eland

[smartie2076]

I am taking over this PR now, and am trying to close it today.

Checkpoints:

• Pull and run all pytest locally -> 260 passed, 2 skipped, 11 warnings in 250.62s (0:04:10)
• Create issue regarding D1
• Create issue regarding "input" in C0 ([Testing] Simplify and create pytest for the process around "input" in C0 #583)
• Add pytests for C0.add_max_cap
• Check function for excessive excess generation - currently excess is really, really bad (with tests/inputs), even on busses where excess should not happen as it poses unnecessary costs (see fuel bus) (see below)
• ❌ Create pytest for excessive excess gerneration test -> issue [Testing] Create pytest for E4.detect_excessive_excess_generation_in_bus() #585

Current status of the excessive excess gereration test:

2020-10-01 15:59:19,497 - WARNING - E4_verification - Attention, on bus Fuel_bus there is an excessive excess generation, totalling up to 200% of the inflows. It seems to be cheaper to have this excess generation than to install more capacities that forward the energy carrier to other busses (if those assets can be optimized).
2020-10-01 15:59:19,513 - WARNING - E4_verification - Attention, on bus Electricity_bus there is an excessive excess generation, totalling up to 200% of the inflows. It seems to be cheaper to have this excess generation than to install more capacities that forward the energy carrier to other busses (if those assets can be optimized).
2020-10-01 15:59:19,531 - WARNING - E4_verification - Attention, on bus PV plant (mono)_bus there is an excessive excess generation, totalling up to 150% of the inflows. It seems to be cheaper to have this excess generation than to install more capacities that forward the energy carrier to other busses (if those assets can be optimized).
2020-10-01 15:59:19,546 - WARNING - E4_verification - Attention, on bus ESS Li-Ion_bus there is an excessive excess generation, totalling up to 1380% of the inflows. It seems to be cheaper to have this excess generation than to install more capacities that forward the energy carrier to other busses (if those assets can be optimized).
2020-10-01 15:59:19,560 - WARNING - E4_verification - Attention, on bus Electricity (DSO)_bus there is an excessive excess generation, totalling up to 200% of the inflows. It seems to be cheaper to have this excess generation than to install more capacities that forward the energy carrier to other busses (if those assets can be optimized).
2020-10-01 15:59:19,575 - WARNING - E4_verification - Attention, on bus Electricity (DSO)_pdp_bus there is an excessive excess generation, totalling up to 200% of the inflows. It seems to be cheaper to have this excess generation than to install more capacities that forward the energy carrier to other busses (if those assets can be optimized).

Fixed with 2c17b9c.

@SabineHaas: Previously, you defined

            if (
                group == ENERGY_PRODUCTION
                and asset_dict[FILENAME] != None
                and asset_dict[TIMESERIES_PEAK][VALUE] != None
            ):
                asset_dict[MAXIMUM_CAP][VALUE] = (
                    asset_dict[MAXIMUM_CAP][VALUE] / asset_dict[TIMESERIES_PEAK][VALUE]
                )

I also think that checking for TIMESERIES_PEAK is a duplicate, so I removed it. Also, the maxCap needs to be multiplied with the asset_dict[TIMESERIES_PEAK][VALUE], so I changed that, too. This is the result:

            if group == ENERGY_PRODUCTION and asset_dict[FILENAME] != None:
                asset_dict[MAXIMUM_CAP][VALUE] = (
                    asset_dict[MAXIMUM_CAP][VALUE] * asset_dict[TIMESERIES_PEAK][VALUE]
                )

[smartie2076]

@Bachibouzouk this is ready to merge after the tests ran though. I did the local pytests (master), and they all passed.

[Bachibouzouk]

Already passed through @SabineHaas and @smartie2076 , so it counts as a review