Multi Usage Applications of Li-Ion Battery Storage in a Large Photovoltaic Plant: A Practical Experience
Multi Usage Applications of Li-Ion Battery Storage in a Large Photovoltaic Plant: A Practical Experience
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大型光伏电站锂离子电池储能多用途应用：实践经验
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
L. Kasprzyk
中科院分区：
文献类型：
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作者：
C. Wenge;R. Pietracho;S. Balischewski;B. Arendarski;P. Lombardi;P. Komarnicki;L. Kasprzyk
在过去几年中，电力系统中安装的大型储能单元的数量有所增加。这一事实仍然与可再生能源在发电中所占份额的增加密切相关。这对于维持电网的稳定性是必要的，由于可再生能源（RES）的数量不断增加，电网的稳定性变得越来越难以维持。这些能源的发电量很难估计，而且生产中可能出现的计划外短缺和过剩是电压和频率波动的原因，这是一种不受欢迎的状态。因此，能量存储的使用不仅有助于电网运行的调节，而且在适当的条件下，如果RES产生太多的能量，或者当RES产生的能量不足时，能量存储的使用还可以构成额外的负载。本文的主要贡献如下：通过实施两个最优控制策略的1兆瓦（0.5兆瓦时）的电池储能（BES）与一个大型的144兆瓦的光伏发电场合作所取得的实际成果的介绍。在第一种情况下，BES用于在光伏发电场产生削减，以避免电网过载。第二种情况的重点是，根据能源市场预测，在能源单价最高的时期，出售所生产的能源，以实现利润最大化。在这两种情况下，存储同时用于满足生产者自己的需求，这消除了与从运营商购买能源相关的成本，特别是在夜间供应期间。考虑到投资的真实的利润，对这两个项目进行了技术和经济评价。确定了利用北京谱仪提高光伏能源功能性的潜力，并在文中进行了讨论。
The number of large energy storage units installed in the power system has increased over the last few years. This fact remains closely linked to the increase in the share of renewable energy in electricity generation. This is necessary to maintain the stability of the grid, which is becoming increasingly difficult to maintain due to the growing number of renewable energy sources (RES). Energy production from these sources is difficult to estimate, and possible unplanned shortages and surpluses in production are the cause of voltage and frequency fluctuations, which is an undesirable state. Consequently, the use of energy storage not only contributes to the regulation of grid operation but can also, under appropriate conditions, constitute an additional load if too much energy is generated by RES, or the source when the generation from RES is insufficient. The main contributions of this paper are as follows: A presentation of practical results achieved by implementing two optimal control strategies for a 1 MW (0.5 MWh) battery energy storage (BES) cooperating with a large 144 MW photovoltaic farm. In the first case, the BES was used to generate curtailment at photovoltaic farm to avoid power grid overload. The second case focuses on maximizing profits from selling the energy produced in periods when the unit price for energy was the highest according to energy market forecasts. In both cases, the storage was used simultaneously to cover the producer’s own demand, which eliminated the costs associated with the purchase of energy from the operator, especially during the night supply. A technical and economic evaluation was prepared for both cases, considering the real profits from the investment. The potential of using the BES to increase the functionality of photovoltaic energy sources was determined and discussed in the paper.