Coordinated scheduling of integrated electricity-gas energy system considering response characteristic of power-to-gas and wind power uncertainty

Renewable energy will play a leading role in future power systems, and the problem of accommodating wind and solar power production represents a critical issue. P2G(Power-to-Gas) technology contributes to alleviating the fluctuation of wind power, which provides an effective way to solve this problem. Many existing studies consider the P2G facilities in the dispatching process of the integrated electricity-gas energy system, but ignore the response characteristics of P2G facilities. As a result, the ability of wind power accommodation is over-estimated, and the feasibility of operating decisions cannot be ensured. To solve this issue, an operation model of an integrated electricity-gas energy system that considers the response characteristics of P2G facilities is proposed, in which the intermittent wind power production is addressed. Firstly, the chance constraint programming approach is adopted to provide secure operating decisions under stochastic wind power output. Then, the response characteristics of P2G facilities and the corresponding downtime and uptime are considered. Finally, the operation model is transformed into a mixed integer linear programming problem by using piecewise linearization and numerical integration approaches. Case studies demonstrate that the consideration of P2G response characteristic ensures the reliable and economic operation of integra-ted electricity-gas energy system. © 2021, Electric Power Automation Equipment Press. All right reserved.