Asymmetric Load and Unbalance Power Flow

[ahhm14]

Hello!

I'm looking at the documentation for Asymmetric Load Flow (https://pandapower.readthedocs.io/en/latest/elements/asymmetric_load.html) and Unbalance Power Flow (https://pandapower.readthedocs.io/en/latest/powerflow/ac_3ph.html)

I understand this features are included in the latest version of the library, although, is this version already avaiable? I have v2.2.2, the latest version in PyPi project.

If not available right now, do you have an estimate of when it will be?

Thank you so much!

[lthurner]

Hi, it is included in the develop version, there is a tutorial on the homepage on how to install it from github.

[jiedxu]

Hi, pandapower team:

Thanks for the excellent work.

I have a similar problem with asymmetric lines. The task is to calculate unbalanced power flows based on data sets from IEEE PES AMPS DSAS Test Feeder Working Group. For example, in 13-bus Feeder of 1992 Test Feeder Cases, line parameters are given as:

I am wondering how I can specify phases of different kinds of lines using pandapower.create_line_from_parameters, because they have different number of phases. Or just to make sure the powers of loads in different phases are correct.

[lthurner]

Single or two phase lines can not be modeled with pandapower yet, only unbalanced loads/generators in 3phase line networks.

[jiedxu]

May I ask why? I am doing my master graduation project. I am appreciated if you can elaborate on the difficulties with single- or V- phase laterals. Or you can recommend some literature that I can refer.

[gourab2009]

@edxu96
We didn't implement single or two-phase lines yet because it is not so relevant for the German and European power systems.
It is very much relevant for Americal power systems and some parts of Australian and New-Zealand electrical systems.

[jiedxu]

@gourab2009 Thanks for the reply.

But I did find a paper, hsieh2017matrix, later. The modeling is very similar to three-phase lines. For example:

• Hsieh, Ting‐Yen, Tsai‐Hsiang Chen, and Nien‐Che Yang (2017). “Matrix decompositions‐based approach to Z‐bus matrix building process for radial distribution systems”. In: International Journal of Electrical Power & Energy Systems 89, pp. 62–68.