Should Natural Gas Be Shipped or Stored to Supply Power Plants?
Should Natural Gas Be Shipped or Stored to Supply Power Plants?
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DOI：
10.24251/hicss.2019.434
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发表时间：
2019-01
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影响因子：
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通讯作者：
S. Blumsack
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作者：
S. Blumsack
在美国东北部经历了一系列极端寒冷的冬季之后，电网运营商开始进行演习，重点是评估向发电厂输送燃料的能力，特别是天然气。这些研究提出了重要问题，并确定了在冬季高峰期可能导致可靠性问题的可能情景，但尚未评估冬季燃料供应能力具体解决方案的经济性。本文描述了对燃气和电力输送规划问题的一种新的建模框架的扩展(电力和天然气联合扩展，或CEGE模型)，该模型允许将集中式或分布式的天然气储存与传统的规划方案(如输电网扩建)一起评估。使用基于新英格兰天然气和电力传输拓扑的测试系统，我们开发了一个简单的两期天然气存储模型，并使用该模型评估了分布式天然气存储的经济价值位置，并比较了在我们的测试系统中增加新英格兰内部存储和扩大管道基础设施以提高新英格兰发电厂燃料输送能力的经济优势。使用该储气模型的初步模拟表明，储气的最佳位置可以与发电厂共置，以解除燃气网络中靠近燃气发电区域的约束压力约束。此外，极端冬季高峰情景的经济后果可能会以更低的成本得到改善，可以通过天然气储存和管道扩建的组合来缓解，而不是仅仅通过管道扩建。
Following a series of winters featuring extreme cold episodes in the Northeastern U.S., power grid operators have engaged in exercises focused on assessing fuel deliverability to power plants, particularly natural gas. These studies have raised important issues and identified possible scenarios that could contribute to reliability problems during winter peaks, but have not evaluated the economics of specific solutions to winter-time fuel deliverability. This paper describes an expansion to a new modeling framework for gas and electric power transmission planning problems (the Combined Electricity and Gas Expansion, or CEGE model) that allows centralized or distributed natural gas storage to be evaluated alongside traditional planning alternatives such as transmission network expansion. Using a test system based on the gas and electric transmission topology in New England, we develop a a simple two-period gas storage model and use this model to evaluate economically valuable locations for distributed natural gas storage and compare the economic merits of increasing storage within New England versus expanding pipeline infrastructure to increase fuel deliverability to New England power plants within our test system. Initial simulations using this storage model suggest that the optimal placement for gas storage may be co-located with power plants to relieve binding pressure constraints in areas of the gas network close to gas-fired generation. Moreover, the economic consequences of extreme winter peak scenarios may be ameliorated at a lower cost with a mix of gas storage and pipeline expansions rather than via pipeline expansion alone.