Co-optimization scheduling of interdependent power and gas systems with electricity and gas uncertainties
Co-optimization scheduling of interdependent power and gas systems with electricity and gas uncertainties
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DOI：
10.1016/j.energy.2018.06.153
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发表时间：
2018-09
期刊：
影响因子：
9
通讯作者：
Chuan He;Lei Wu;Tianqi Liu;Wei Wei-Wei;Cheng Wang
中科院分区：
文献类型：
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作者：
Chuan He;Lei Wu;Tianqi Liu;Wei Wei-Wei;Cheng Wang
燃气发电机天然气燃料消耗的快速增长以及新兴的电转气技术加剧了电力和天然气系统的相互依赖。因此，这种相互依赖性，加上电力系统（如电力负荷和可再生能源）和燃气系统（如燃气负荷）的异构不确定性，给能源系统运营商如何确保相互依赖的电力和燃气系统的安全和经济运行带来了新的挑战。具体来说，一个基础设施的不确定性很容易传播到另一个基础设施，从而增加脆弱性，最终导致两个系统的级联中断。本文提出了一种两阶段可调鲁棒模型来研究相互依赖的电力和天然气系统的日前协调优化调度。双燃料发电机组也被考虑用于削减天然气燃料消耗并确保在天然气需求高峰时段两个系统的安全。此外，Weymouth气体流量约束通过泰勒级数展开进行线性化，这有利于列和约束生成算法的实现，以有效地解决所提出的第二阶段具有非线性气体流量约束的两阶段可调鲁棒模型。数值案例研究表明，双燃料机组可以增强相互依赖的电力和天然气系统的安全和经济运行，特别是当天然气需求存在向上的不确定性时。研究还表明，电转气设施可以通过有效地将过量的可再生能源发电转化为天然气，促进不稳定的可再生能源的更深入渗透。
The rapid growth of natural gas fuel consumption by gas-fired generators and the new emerging power-to-gas technology have intensified interdependency of electric power and natural gas systems. Consequently, such interdependency, together with heterogeneous uncertainties of the power system (e.g., power loads and renewable energy) and the gas system (e.g., gas loads), has brought new challenges to energy system operators for the secure and economic operation of interdependent power and gas systems. Specifically, uncertainties from one infrastructure could easily spread to the other, which consequently increase vulnerability and eventually lead to cascading outages of both systems. This paper proposes a two-stage adjustable robust model to study day-ahead coordinated optimal scheduling of the interdependent power and gas systems. Dual-fuel generating units are also considered for shaving gas fuel consumptions and ensuring the security of both systems during peak gas demand hours. Moreover, Weymouth gas flow constraints are linearized via Taylor series expansion, which facilitates the implementation of column-and-constraint generation algorithm to effectively solve the proposed two-stage adjustable robust model with nonlinear gas flow constraints in the second stage. Numerical case studies illustrate that dual-fuel units can enhance the secure and economical operation of interdependent power and gas systems, especially when natural gas demands present upward uncertainties. It is also demonstrated that power-to-gas facilities can facilitate a deeper penetration of volatile renewable energy by effectively converting excessive renewable generation into natural gas.