Key features of the energy internet such as energy sources, communication technologies, data computation, energy management systems and financial analysis are highlighted to enhance the energy efficiency, reliability, and security of the power network. Energy Internet, a futuristic evolution of electricity system, is conceptualized as an energy sharing network. Its features, such as plug-and-play mechanism, real-time bidirectional flow of energy, information, and money can lead to significant benefits and innovation in electricity production and. The concept of 'Energy Internet' (EI) has been widely accepted by both academic and industry experts after more than a decade of development. Since it was proposed, EI has been discussed and applied to many technical works in power and energy areas.
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