摘要
电转气技术可消纳电力系统过剩电能,同时其具有的碳捕捉作用能提升电力系统低碳性。针对现有可再生能源消纳以及低碳化发展趋势,提出一种面向电-气双向耦合与低碳的综合能源系统电转气厂站优化规划策略。该策略考虑耦合系统中各部分特征,以耦合系统年投资运行成本与碳排放成本之和最小为优化目标;在目标函数中,计及弃风成本和购气成本,以及在电转气厂站碳捕捉作用下综合能源系统的碳排放成本,建立基于现有可再生能源出力大小的电转气厂站优化规划数学模型,采用粒子群优化算法进行模型求解。最后以IEEE-9节点电力系统和7节点天然气系统组成的电力天然气耦合系统为例进行验证分析,仿真结果表明所提方法在最大化消纳可再生能源的同时拥有较好的经济性和低碳性。
The power-to-gas(P2G)technology can absorb excess power of power system.At the same time,it can also improve the system’s low-carbon performance owing to its carbon capture function.Aimed at the consumption of the existing renewable energy and the low-carbon development trend,an optimal planning strategy for a P2G power station oriented to the electricity-gas bidirectional coupling and low carbon is proposed in this paper.Under this strategy,the characteristics of each part of the coupling system are considered,and the minimum sum of the corresponding annual investment and operation cost and carbon emission cost is adopted as the optimization objective.In the objective function,the costs of wind abandonment and gas purchase are taken into account,together with the carbon emission cost of the integrated energy system under the effect of carbon capture of the P2G power plant.A mathematical model of optimal planning for the P2G power station based on the existing renewable energy output is established,which is further solved using the particle swarm optimization algorithm.Finally,a power and natural gas coupling system consisting of an IEEE 9-bus power system and a 7-bus natural gas system is taken as an example to verify the proposed method,and simulation results show that the novel method has a good performance in terms of economy and low carbon property while maximizing the renewable energy consumption.
作者
周步祥
华伟杰
张远洪
臧天磊
ZHOU Buxiang;HUA Weijie;ZHANG Yuanhong;ZANG Tianlei(College of Electrical Engineering,Sichuan University,Chengdu 610065,China)
出处
《电力系统及其自动化学报》
CSCD
北大核心
2022年第6期9-17,24,共10页
Proceedings of the CSU-EPSA
基金
国家自然科学基金资助项目(51907097)。
关键词
综合能源系统
电-气双向耦合
电转气技术
低碳
优化规划
integrated energy system
electricity-gas bidirectional coupling
power-to-gas(P2G)technology
low carbon
optimal planning
