抽水蓄能

抽水蓄能水电是美国的能源储备

一切旧的都是新的. 水电 is making its comeback, 和 not just as a generation source. 水也可以充当电池. It’s called pumped storage 和 it’s the largest 和 oldest form of energy storage in the country, 这是最有效的大规模能量储存形式.

皇冠现金官方网站APP发电是美国最早的可再生能源. It is often mistakenly considered a tapped resource, but according to the U.S. 美国能源部2016年水电远景报告, hydropower’s capacity can sustainably add 50 new gigawatts by 2050 — 36 GW of which is pumped storage.

New NHA Report Identifies Market, Regulatory Challenges to 抽水蓄能 水电’s Growth

NHA发布2018年抽水蓄能报告

The 国家水电协会 (NHA) today released the 2018 抽水蓄能 Report, 美国的承诺和面临的挑战有哪些细节.S. 抽水蓄能水电工业. 抽水蓄能水电, 这是美国最大的电网规模的能源储存来源, can help solve some of the most urgent problems facing the electric power sector today. Despite ensuring that electric supply securely matches electric dem和 和 in real-time, 市场, 政策和监管负担继续阻碍其增长.

报告发现PSH的一些关键属性, such as 网格 reliability 和 the integration of additional renewable resources, are not adequately compensated within the current environmental 和 power 市场s 和 regulatory constructs. 例如, 批发电力市场服务如频率调节, 在今天的许多市场中,不断增加和旋转的外汇储备并不被重视, or valued in one independent system operator’s 市场 rules 和 product definitions, 但不是在另一个地方. 在许多情况下, these are typically real-time or day-ahead 市场s 和 there are no long-term 市场 products where a bulk storage project can attract investors seeking revenue certainty through long-term power purchase agreements or defined value streams.

PSH项目开发商还面临着漫长的许可程序. Currently it can take up to ten years before a project to be licensed, built 和 become operational. 在当今瞬息万变的能源行业, such a long lead time could render a project obsolete before it is permitted.

除了概述PSH行业面临的挑战, the Report provides a series of recommendations to guide the energy industry, 监管机构, 和政策制定者.

改善市场和政策

  • Develop 市场 products that allow flexible resources to be compensated for providing services that help meet electric 网格 requirements, including fast responding systems that provide critical capacity during key energy needs.
  • Develop 市场 mechanisms that evaluate energy storage technologies based on their abilities to provide key supporting services to the overall electric 网格, 考虑项目生命周期成本, 性能和储能系统降级.
  • Develop 市场 mechanisms 和 products that recognize the potential energy reliability 和 security role PSH plays in the domestic electric 网格.

监管的改进

  • 建立一个替代, streamlined licensing process for low-impact pumped storage hydropower, 如off-channel, 模块化, 或闭环项目.
  • 在没有竞争性批发(能源或产能)市场的地区, require consideration of energy storage resources in state integrated long-term planning processes; including requiring equal consideration with traditional resources.
  • Develop st和ard evaluation criterion for all forms of energy storage so that different types of energy storage can easily be compared 和 evaluated.

抽水蓄能 today makes up 97 percent of utility-scale energy storage in the United States at 42 sites with a total of 23 GW of capacity.

抽水蓄能解释

抽水蓄能 facilities are built to push water from a lower reservoir uphill to an elevated reservoir during times of surplus electricity. 在抽水模式, electric energy is converted to potential energy 和 stored in the form of water at an upper elevation, 这就是为什么它有时被称为“水电池”. Pumping the water uphill for temporary storage “recharges the battery”.

从那里开始,重力就会处理剩下的事情 .在电力需求高的时期, the stored water is released back through the turbines 和 converted back to electricity in generating mode like a conventional hydropower facility.

图片来源:U.S. 能源部水电远景报告

抽水蓄能使更多的风能和太阳能成为可能

抽水蓄能 hydropower enables greater integration of other renewables (wind/solar) into the 网格 by utilizing excess generation, 和 being ready to produce power during low wind 和 solar generation periods. It also has the ability to quickly ramp electricity generation up in response to periods of peak dem和.

As the capacity of available firming resources continue to be stretched to their limit to support the growth of
可变可再生能源,美国.S. electric industry is moving more toward the deployment of emission-free energy storage resources. 抽水蓄能提供可预测的、一致的发电.

抽水蓄能 facilities are like sponges; they can suck up this excess energy from the 网格 和 store it for later.

抽水蓄能和电网

其他可再生能源, 比如风能和太阳能发电, 而在足够的地理多样性下,变量较少, 可以提供新的
美国面临的挑战.S. 网格. The power output in variable generation resources can fluctuate widely as weather patterns change 和, 而不断变化的天气模式可能很好皇冠走地世界杯盘, 可再生能源发电的规模急剧上升(尤其是, when not in correlation with changing load) can be challenging to 网格 operators when renewable energy resources are a large component of their generation portfolio. 这种可变的输出可能导致频率和电压的波动, 哪些对电网稳定性有负面影响.

抽水蓄能, 然而, meets increased transmission system dem和s for reliability 和 system reserves. 它的变化, 商店, 和 reuses energy generated until there is the corresponding dem和 for system reserves 和 variable energy integration.

This shifting, when performed at a 网格-scale, can also avoid transmission congestion periods (i.e., absorb or consume surplus generation to levels consistent with transmission transfer capability), 帮助更有效地管理电网(e.g., 快速获得显著和持续的能量提升), 以及避免潜在的能源供应中断(例如.g.、供应运行储备、纺纱惯性等.). Advanced adjustable speed technology also allows pumped storage to provide an even greater range of fast ramping, 上上下下, 和 frequency regulation services in both the generation 和 pumping modes.