This is a short, general explanation of the electricity grid, with some information on the use of the grid to transmit electricity from renewable sources.
This article covers a variety of issues - a description of the grid, how it is regulated, what are its vulnerabilities, what are its strengths, how can it be improved and more.
This article in Wikipedia describes the electrical grid, its history, its extent, how it is built, its functionality and its implicit impact on climate change.
