摘要
Power-to-gas technology uses temporary surplus electricity to create either renewable hydrogen or renewable natural gas,which can then be stored in natural-gas pipelines and used when needed.As a result,P2G transforms conventional one-way coupling of a power/heat/natural-gas system into twoway coupling.Furthermore,its operating characteristics makes it possible to more effectively utilize wind-power.This paper describes a new optimal dispatch model for integrated electricity/gas/heat energy systems.The model considers the effective use of surplus wind-energy with electricity-to-gas equipment.First,a multi-energy network model is built,taking into account both equipment and network constraints.Then,we apply a novel two-layer optimization method,which uses P2G,to“absorb”wind power.While the top-layer model is used for the dayahead dispatch of the natural-gas network containing P2G,the bottom-layer model describes the day-ahead economic dispatch of the electricity/heat system,which includes wind power.Based on the Karush-Kuhn-Tucher conditions of the bottom-layer model,the two-layer model is transformed into a single-layer model,and we linearize the nonlinear equation to convert the nonlinear model into a mix-integer linear programming problem,which is solvable using the General Algebraic Modeling System.Finally,numerical case-studies are performed to evaluate the accuracy and effectiveness of the proposed method.
基金
sponsored by Shanghai Sailing Program(20YF1418800)
Outstanding PhD Graduate Development Scholarship of Shanghai Jiao Tong University.
