[feature] Request to add four-winding transformer equipment

[zhtee]

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Feature Type

• Adding new functionality to pandapower

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Problem Description

Hello, in our practical work, four-winding transformers have been increasingly used. This type of transformer adds a filtering winding to achieve functions such as filtering third harmonics. Therefore, I would like to know if it is possible to add a four-winding transformer device?

Feature Description

Adding four-winding transformer equipment eliminates the need for users to perform equivalent calculations themselves.

Additional Context

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