Simulating price-aware electricity storage without linear optimisation
Simulating price-aware electricity storage without linear optimisation
复制标题
在没有线性优化的情况下模拟价格感知电力存储
DOI：
10.1016/j.est.2018.08.022
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发表时间：
2018
影响因子：
9.4
通讯作者：
I. Staffell
中科院分区：
文献类型：
--
作者：
K. R. Ward;I. Staffell
事实证明，电力存储对于高度可再生的电力系统至关重要，但目前的技术对其运行和影响进行建模的能力受到限制。基于历史市场价格或其他固定价格时间序列的研究很常见，但无法解释存储对价格的影响，从而高估利用率和利润。最小化总系统成本的电力系统模型无法根据市场价格对存储的经济调度进行建模，因此无法考虑不完全竞争的大型存储设备聚合商。我们演示了新的算法，该算法使用简单的函数编程来计算存储的利润最大化调度，考虑到其价格影响。这些与技术无关，可以考虑短期电池存储到跨季节化学存储（例如电力转天然气）。这些模型考虑了竞争性和垄断性运营商，并且需要 1-10 秒的时间在一年内调度 GW 的储能。通过对英国电力系统的案例研究，我们表明，未能对价格效应进行建模会导致 ∼50GW 系统中容量超过 100MW 的利润和利用率出现重大错误。我们模拟了高达 10GW 的存储，根据所有权显示出截然不同的结果。与完全竞争市场相比，垄断所有者将存储利用率限制30%，以增加85%的利润，从而通过平滑间歇性可再生能源的需求和产量而减少20%的社会效益。
Electricity storage could prove essential for highly-renewable power systems, but the ability to model its operation and impacts is limited with current techniques. Studies based on historic market prices or other fixed price time-series are commonplace, but cannot account for the impacts of storage on prices, and thus over-estimate utilisation and profits. Power systems models which minimise total system cost cannot model the economic dispatch of storage based on market prices, and thus cannot consider large aggregators of storage devices who are not perfectly competitive.We demonstrate new algorithms which calculate the profit-maximising dispatch of storage accounting for its price effects, using simple functional programming. These are technology agnostic, and can consider short-term battery storage through to inter-seasonal chemical storage (e.g. power-to-gas). The models consider both competitive and monopolistic operators, and require 1–10 s to dispatch GWs of storage over one year.Using a case study of the British power system, we show that failure to model price effects leads to material errors in profits and utilisation with capacities above 100 MW in a ∼50 G W system. We simulate up to 10 GW of storage, showing dramatically different outcomes based on ownership. Compared to a perfectly competitive market, a monopolistic owner would restrict storage utilisation by 30% to increase profits by 85%, thus reducing its benefit to society via smoothing demand and output from intermittent renewables by 20%.
套利存储的优化控制及其在能源系统中的应用
DOI：
10.1109/ciss.2014.6814090
发表时间：
2014
期刊：
--
影响因子：
--
作者：
Cruise J
通讯作者：
Cruise J