Coordination of Interdependent Electricity Grid and Natural Gas Network—a Review

Purpose of Review: The fast growth of gas-fired generating units and the new emerging power-to-gas (PtG) technology have intensified the interdependency of the electricity grid and the natural gas network. Indeed, the security and economy of one system could directly and significantly affect that of the other. In observing these new trends and changes, a coordinated optimization between the two energy systems has attracted increasing attentions in recent years, which is believed to derive much more satisfactory solutions than optimized separately. Thus, this paper provides a comprehensive review of existing works on the coordination of interdependent electricity grid and natural gas network. Recent Findings: The paper first highlights the modeling of key coupling components and discusses various coordination strategies of the two energy systems. The review then focuses on three major aspects of the coordination: coordinated short-term scheduling, coordinated long-term expansion planning, and energy market and energy hub. Summary: Research and practical implementation on coordination of the interdependent electricity and natural gas system (IENS) are still in the infant stage. Challenges and potential future research directions that could further benefit the secure, reliable, and economic operation and planning of future IENS are summarized.