### Comparison between the Smart and Conventional Grids  
In the traditional power grid, the grid carries power from the central generating station with a conventional distribution system, while in the smart grid, bi-directional flow of electricity between consumers and the grid is enabled by two-way communication and automated and smart distribution networks [12; 13]. Through the use of modern and advanced information technologies, the smart grid can deliver power to the consumers' premises in an efficient way. Surveys on various basic concepts of the smart grid were conducted in [14; 15; 16; 17; 18; 19; 20; 21; 22; 23; 24; 25]. Some of these surveys are summarized in Table 3. \begin{table}
\begin{tabular}{p{113.8 pt} p{227.6 pt}} \hline \hline
**Existing Surveys** & \\
**on the Smart Grid** & **Objective** \\ \hline \hline \multirow{3}{*}{[26]} & In this paper, the authors review different demand response (DR) schemes for energy management. The authors describe various incentive schemes in term of price reduction to participate in the given DR. Moreover, the authors classify the DR algorithms on the basis of system constraints and computational complexity. \\ \hline \multirow{3}{*}{[21]} & In this paper, the authors review all the communication media that is needed in smart grid technology. \\ \hline \multirow{3}{*}{[27]} & In this paper, the authors highlight the potential applications of communication and information technology in smart grid architecture that could be helped by an economic and reliable power system. \\ \hline \multirow{3}{*}{[22]} & The authors review the communication networks that are needed for secure data sharing and control among the various parts of the power system. \\ \hline \multirow{3}{*}{[28]} & This paper explains the challenges associated with the design of smart grid communication networks. \\ \hline \multirow{3}{*}{[29]} & In this paper, the authors review various cyber security issues associated with communication networks in the smart grid that can effect the reliability and system operation of the power system. \\ \hline \multirow{3}{*}{[30]} & In this paper, the authors review the energy efficient communications networks among the smart grid and the various data centers that manage the power system. \\ \hline \multirow{3}{*}{[23]} & Numerous types of wireless communication and their feasibility of usage for different areas of the power system are explored in this report. \\ \cline{1-1}  & \\ \cline{1-1}  & \\ \cline{1-1}  & \\ \cline{1-1}  & \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Comparison between the existing surveys and our proposed survey. Figure 1: General layout of the smart grid’s architecture. A comparison of the traditional grid and the smart grid is given in Table 4[13; 39; 40]. The smart grid can be explained through different technical perspectives, e.g., smart control and protection systems, the smart management system, and smart infrastructure. The communication capability in the smart grid is the key feature which differentiates it from the conventional grid and which plays a vital role in the smart grid. Different researchers have focused on different perspectives to evaluate and explain the smart grid. The author in [41] demonstrated that instead of an expensive wired communication system, the wireless sensor and actuator network (WSAN) is more suitable for communication in the smart grid. Moreover, the use of wireless sensors and actuators can efficiently improve the performance of communication in smart grid [42]. With the help of these communication networks, the smart grid becomes able to efficiently manage energy consumption and solve the consumers' as well as the suppliers' issues.