Estimating the value of electricity storage in an energy-only wholesale market
Estimating the value of electricity storage in an energy-only wholesale market
复制标题
估算纯能源批发市场中蓄电的价值
DOI：
10.1016/j.apenergy.2015.09.006
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发表时间：
2015
期刊：
影响因子：
11.2
通讯作者：
M. Sandiford
中科院分区：
文献类型：
--
作者：
D. Mcconnell;Tim Forcey;M. Sandiford
价格波动和可再生能源发电的增加提高了人们对纯能源电力市场中存储技术潜在机会的兴趣。在本文中，我们探讨了在这样一个市场，澳大利亚的国家电力市场（NEM）的价格采取存储设备的价值。我们的分析表明，在最佳操作下，在这个市场上拥有超过6小时的存储几乎没有价值。然而，由于无法完美预测批发价格，特别是极端价格飙升，可能需要一些额外的存储。我们发现，存储设备有效地提供了与峰值发电机类似的服务，并且同样依赖并暴露于极端价格事件，商业发电机的收入高度倾斜于一年中的几天。由于这一发现，与之前的研究相反，存储值被发现对往返效率相对不敏感。我们还发现，使用常见的对冲策略（如峰值发电商目前使用的策略）可以减少收入的可变性和对极端价格的敞口。我们提出了一个案例研究，证明使用这种策略的存储技术可能比NEM中的其他调峰发电机具有竞争优势，因为它能够在极端峰值事件之外获得收入。与传统的峰值发电机类似，在纯能源电力市场中，储能选择的主要驱动因素是极端价格，而这反过来又取决于容量需求。然而，储能技术可以获得额外的收入来源，这可能会通过增加可再生能源的整合而得到改善。
Price volatility and increasing renewable energy generation have raised interest in the potential opportunities for storage technologies in energy-only electricity markets. In this paper we explore the value of a price-taking storage device in such a market, the National Electricity Market (NEM) in Australia. Our analysis suggests that under optimal operation, there is little value in having more than six hours of storage in this market. However, an inability to perfectly forecast wholesale prices, particularly extreme price spikes, may warrant some additional storage. We found that storage devices effectively provide a similar service to peak generators and are similarly dependent on and exposed to extreme price events, with revenue for a merchant generator highly skewed to a few days of the year. As a consequence of this finding, and in contrast to previous studies, the value of storage was found to be relatively insensitive to the round trip efficiency. We also found that the variability of revenue and exposure to extreme prices could be reduced using common hedging strategies, such as those currently used by peak generators. We present a case study that demonstrates storage technologies using such strategies may have a competitive advantage over other peaking generators in the NEM, due to the ability to earn revenue outside of extreme peak events. Similar to traditional peak generators, a main driver for storage options in an energy-only electricity market is extreme prices, which in turn is dependent on capacity requirements. However storage technologies can receive additional revenue streams, which may be improved by increased integration of renewable energy.