Harmonic hosting capacity

[hakanergun]

Versions: v0.1.0 - init, hosting capacity with fixed angle of the harmonic injection. v0.2.0 - allow for variable angle of the harmonic injection, to enable (partial) recombination of the harmonic pollution.

[timmyfaraday]

Version 0.3.0 - Harmonic Fridays 24/11

• [x] Make slides for the monthly meeting, show v0.2.0, i.e., deterministic problem is ready
• [x] Check failing tests of the package
• [x] Have a discussion on slack bus behavior for harmonic currents, i.e., behavior of (29) and (30) in v0.2.0
• [x] Build v0.3.0: SOC problem formulation ready for robust optimization, including assumptions:
  1. Planning problem for fundamental component is out of scope
  2. Fundamental voltage becomes a parameter, in future versions, a stochastic parameter -> Concretely, this drops the lower bound in (7), and entirely drops (31) and (32) in v0.2.0
• [ ] Relate the harmonic current angle cone to the general summation law in IEC61000-3-6, see: Extension on IEC 61000-3-6’s General Summation Law to Estimate Harmonic Current at PCC Based on Probability Distribution by Trelles-Molina et al.

[timmyfaraday]

Version 0.3.0 -- Harmonic Fridays 8/12

• [x] Add Type to dispatch to specific formulation (@timmyfaraday)
• [x] Add SOC formulation v0.3.0 (@timmyfaraday)
• [ ] Add automatic vector group shift wrt reference bus (@hakanergun)
• [ ] Add c_rating of the load to the input file, not a-postiori (@hakanergun)
• [x] Add slack bus as discussed 1/12 (@timmyfaraday), no direct way to set the reference angle harmonic voltage distortion
• [x] Remove ElectricalEngineering from Pkg, otherwise this has to built and downloaded everytime the tests are run (@hakanergun)

[timmyfaraday]

Version 0.3.0 -- Harmonic Fridays 15/12

• [ ] Have a discussion on how to handle RMS limit for current through a branch
• [ ] Evaluate flows

[timmyfaraday]

HARMONIC - January

Goal should be to build, document and validate the two models for the deterministic harmonic hosting capacity problem:

• NLP (dHHC_NLP): exact formulation, and
• SOC (dHHC_SOC): approximation of the load current magnitude.

The following grid elements are currently considered: 1) slack bus, 2) branches (pi-model), 3) transformers (t-model), 4) passive shunt elements, and 5) general harmonic load where for h=1: constant power and for h>1: constant current.

TO DOs

Build models

• [x] Reference bus with pre-set harmonic distortion (@timmyfaraday by 19/01)
• [x] Add relevant bounds to all variables (@hakanergun by 19/01)
• [ ] Add cut to strengthen the SOC approximation (on 02/02)
• [x] Add current limits to the transformers (@timmyfaraday)

Validate models

• [ ] Validate the flows through the industrial network (@timmyfaraday + @hakanergun on 19/01)
• [ ] Validate the necessity of the load current angle cone (@timmyfaraday + @hakanergun on 19/01) An alternative could be to apply the general summation law directly.

Document models

• [x] Build two overleaf documents detailing the models (@timmyfaraday)
• [x] Build slide set detailing the features of the models, including considered grid elements (@timmyfaraday by 26/01)

[timmyfaraday]

HARMONIC - February

Two models for the deterministic harmonic hosting capacity problem:

• NLP (dHHC_NLP): exact formulation, and
• SOC (dHHC_SOC): approximation of the load current magnitude.

The following grid elements are currently considered: 1) slack bus, 2) branches (pi-model), 3) transformers (t-model), 4) passive shunt elements, and 5) general harmonic load where for h=1: constant power and for h>1: constant current.

TO DOs to get to v0.2.0

Addition of features

• [x] Add fairness principle to the objective (@timmyfaraday on 15/02)
• [x] Addition of four fairness principles in the paper (@timmyfaraday on 29/02)

Validate models

• [x] Validate the flows through the industrial network (@timmyfaraday + @hakanergun on 16/02)

Document models (after pushing v0.2.0 to main)

• [ ] Build documentation on Github pages (@timmyfaraday)

Code review

• [x] Clean implementation of active filter (@timmyfaraday on 15/02)
• [x] General spring cleaning (@timmyfaraday + @hakanergun on 15-16/02)
• [x] Fix issues with HOPF implementation (@timmyfaraday + @frederikgeth on 20/02)

TO DOs to get to v0.2.1

Recombination of Harmonic Currents

Investigate methods to enable recombination of harmonic currents from different harmonic loads: current angle cone vs general summation law

• [ ] Implement method for recombination of harmonic currents (@timmyfaraday + @hakanergun)
• [ ] If current angle cone, add cut to strengthen the SOC approximation (@timmyfaraday + @hakanergun)

TO DOs for first journal paper on deterministic harmonic hosting capacity

• [ ] Introduction - Background and Motivation (@hakanergun)
• [x] Mathematical Framework - Harmonic Power Flow (@timmyfaraday)
• [x] Mathematical Framework - Harmonic Hosting Capacity (@timmyfaraday)

[timmyfaraday]

DO NOT DELETE THIS BRANCH