Python code for the balanced version of the load flow method presented in the following paper has been uploaded.
Homaee, O., Najafi, A., Dehghanian, M., Attar, M. and Falaghi, H., 2019. A practical approach for distribution network load balancing by optimal re‐phasing of single phase customers using discrete genetic algorithm. International Transactions on Electrical Energy Systems, 29(5), p.e2834. (available at: https://onlinelibrary.wiley.com/doi/pdf/10.1002/2050-7038.2834 )
Required data to run the load flow program for the well-known 69 bus distribution systems has been uploaded in an excel file entitled "69bus.xls". It is worth mentioning that the result of this load flow has been verified.