The Smart Grids are the future vision of the electric power system with integrated communication, protection, control and sensing technologies. With the introduction of new technologies which constitute the smart grid like demand response, demand side management, electric vehicles, energy storage systems, distributed energy resources, integration of renewable energy resources, and forecasting methods like artificial neural networks, deep learning methods etc, the scope of planning and operation of a smart grid has broadened. The new technologies bring in the need for better tools for solving the planning and operation problems. This paper aims to provide a survey of the works related to some of the smart grid components and classifies the works based on the computational intelligence tools used in solving the planning or operation problem. © 2018 IEEE.