Utilising the flexible generation potential of tidal range power plants to optimise economic value
Utilising the flexible generation potential of tidal range power plants to optimise economic value
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DOI：
10.1016/j.apenergy.2018.12.091
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发表时间：
2019-01
期刊：
影响因子：
11.2
通讯作者：
Freddie Harcourt;A. Angeloudis;M. Piggott
中科院分区：
文献类型：
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作者：
Freddie Harcourt;A. Angeloudis;M. Piggott
潮汐范围可再生发电厂有能力向电网输送可预测的能量，这取决于已知的潮汐变化性。潮汐发电厂本身具有水力发电更普遍的优势，包括寿命超过替代可再生能源技术，以及相对较低的运营和维护成本。然而，这项技术通常会受到与资本成本相关的重大前期投资的制约。与其他可再生能源相比，这项技术之所以脱颖而出的一个关键方面是，它在发电时间上拥有部分灵活性。在这项研究中，我们提供了详细的设计方法，旨在优化潮汐能量结构的时间运行，特别是在英国布里斯托尔海峡内提出的斯旺西湾潮汐泻湖。除了专注于能源最大化的经典激励外，我们还制定了一个目标泛函，以促进该计划从前一天能源市场获得最大收益。仿真结果表明，有机会利用潮汐的可预测性和发电精确时间的灵活性，显著降低经常与监管机构和政府谈判的补贴成本。此外，我们建议，这种方法应该使潮差能源在确保英国供应安全方面发挥更积极的作用。基于收入的优化控制更是突显了这一点，这种控制在需求较高的时期平均提供更多电力。对于斯旺西湾潮汐泻湖的案例研究，与非适应性作业相比，在优化其作业后所获得的收入增加了23%。同样，在一年的运营中，相对于能源最大化方法的10%的增长表明，在电价变化的情况下简单地最大化能源发电量可能不是最佳策略。
Tidal range renewable power plants have the capacity to deliver predictable energy to the electricity grid, subject to the known variability of the tides. Tidal power plants inherently feature advantages that characterise hydro-power more generally, including a lifetime exceeding alternative renewable energy technologies and relatively low Operation & Maintenance costs. Nevertheless, the technology is typically inhibited by the significant upfront investment associated with capital costs. A key aspect that makes the technology stand out relative to other renewable options is the partial flexibility it possesses over the timing of power generation. In this study we provide details on a design methodology targeted at the optimisation of the temporal operation of a tidal range energy structure, specifically the Swansea Bay tidal lagoon that has been proposed within the Bristol Channel, UK. Apart from concentrating on the classical incentive of maximising energy, we formulate an objective functional in a manner that promotes the maximisation of income for the scheme from the Day-Ahead energy market. Simulation results demonstrate that there are opportunities to exploit the predictability of the tides and flexibility over the precise timing of power generation to incur a noticeable reduction in the subsidy costs that are often negotiated with regulators and governments. Additionally, we suggest that this approach should enable tidal range energy to play a more active role in ensuring security of supply in the UK. This is accentuated by the income-based optimisation controls that deliver on average more power over periods when demand is higher. For the Swansea Bay tidal lagoon case study a 23% increase is observed in the income obtained following the optimisation of its operation compared to a non-adaptive operation. Similarly, a 10% increase relative to an energy-maximisation approach over a year’s operation suggests that simply maximising energy generation in a setting where power prices vary may not be an optimal strategy.