论文标题
建模气流方向作为状态变量：它是否为电源系统提供了更大的灵活性？
Modeling Gas Flow Directions as State Variables: Does it Provide More Flexibility to Power Systems?
论文作者
论文摘要
作为一种常见的做法，为简化目的确定每个管道中天然气流的方向，并将其视为调度问题中的给定参数。但是，在具有大量间歇性可再生能源份额的集成气体和电力网络中，不再直接预先确定气体流动方向。气流方向的错误预先确定可能会导致可行，但不一定是最佳时间表。我们提出了一个混合组合线性优化模型，以确定安排系统时的最佳气流流向。如果存在电源和气体系统之间的紧密协调，这将解锁对电力系统的额外灵活性。尽管它以增加计算复杂性的成本为代价，但通过将整个系统的总运行成本与双向气流进行比较而不是单向气流，可以量化其灵活性。我们从数值上表明，将气流方向建模为状态变量，不仅在网格中，而且在径向气体网络中也带来附加值。
As a common practice, the direction of natural gas flow in every pipeline is determined ex-ante for simplification purposes, and treated as a given parameter within the scheduling problem. However, in integrated gas and electric power networks with a large share of intermittent renewable power supply, it is no longer straightforward to optimally predetermine the gas flow directions. A wrong predetermination of gas flow directions may result in feasible but not necessarily optimal schedules. We propose a mixed-integer linear optimization model to determine the optimal gas flow directions while scheduling the system. This unlocks additional flexibility to power systems, provided that a tight coordination between power and gas systems exists. The increased flexibility, although it comes at the cost of increased computational complexity, is quantified by comparing the total operational cost of the entire system with bidirectional gas flows as opposed to unidirectional gas flows. We numerically show that modeling gas flow directions as state variables may bring added value not only in the meshed but also in the radial gas networks.
