Smart grid enhances optimization in generation, distribution and consumption of the electricity by integrating information and communication technologies into the grid. Today, utilities are moving towards smart grid applications, most common one being deployment of smart meters in advanced metering infrastructure, and the first technical challenge they face is the huge volume of data generated from variety of smart devices including the meters. This data is beneficial for both customers and utilities, but only if the capability of using it and extracting knowledge and hidden patterns from data is exploited. In this article, a brief overview of data sources along with applications of big data analytics in power distribution networks and related analytical data models are presented. At the end, big data management tools and techniques applicable in power distribution networks are introduced. Manuscript profile