Azure Analysis Services - refresh

Hello _Vladimir_,
Azure Analysis Services uses the same data gateway as Power BI. https://docs.microsoft.com/en-us/azure/analysis-services/analysis-services-gateway are the docs 
Incremental refresh would be defined in your https://docs.microsoft.com/en-us/analysis-services/tabular-models/partitions-ssas-tabular?view=asallproducts-allversions in how you set up your model. 

The refresh would be handled outside of Analysis Services via your existing ELT process and an XMLA command, or an https://medium.com/ricoh-digital-services/process-azure-analysis-services-models-with-azure-data-factory-v2-d7c6288f352c pipeline or https://docs.microsoft.com/en-us/azure/analysis-services/analysis-services-refresh-azure-automation. 

If you use just regular processing in Azure Analysis Services the processing may still take longer than an hour due to the long running HTTP call. You can get around this in AAS by using https://docs.microsoft.com/en-us/azure/analysis-services/analysis-services-async-refresh instead. 

HTH!