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储能是解决可再生能源发电不稳定的有效方式之一，从而实现可再生能源的大规模利用与分享。储能的方式可以是电池，也可以通过需求响应的方式实现。以能源互联网的气电协同规划为背景，通过电转气技术可以实现有效、长期、广域的储能。文中从能源互联网的角度介绍电转气技术的基本理论，并提出电转气应用于电力系统与天然气网络的规划与运行的可能方式。采用多阶段气电协同规划为例验证方法的可行性。“,”Energy storage has been recognized as one of the most effective ways to facilitate intermittent renewable energy and to maximize the benefits of customers participating in the electricity market in a smart grid environment. Energy storage can be realized in the form of actual devices such as utility batteries or the participation of demand response programs. As a promising vision, energy internet opens up another perspective for effective, long term, wide range energy storage option through its power-to-gas (P2G) functionalities. This paper discussed the basic concept of the P2G in the energy internet vision and proposed a framework of virtual energy storage for future electricity and gas network. Case studies were also carried out to demonstrate the application of P2G to power system-gas network joint planning problem.