Single line representation of power system

Trying to symbolize a practical power system where a lot of interconnections among numerous generating stations including a large number of transformers by using three lines equivalent to R, Y and B phase will become needless clumsy and complex. To avoid this, a single line all along with some symbolical representations for generator, transformers substation buses are employed to symbolize a power system instead neatly. For illustration, the system with three lines will be simplified to figure shown below by using single line.  

                                             Figure: Single line representation of power system.

As another illustration, an interconnected power system is symbolized in the self described figure as shown below – it is hoped that you understand the significant features communicate around the system via this figure shown below. 

                                             Figure: Single line representation of power system.