Wind energy's role in the global electric grid is set to expand significantly. New York State alone anticipates offshore wind farms (WFs) contributing 9GW by 2035. Integration of energy storage emerges as crucial for this advancement. In this study, we focus on a WF paired with a captive battery energy storage system (BESS). We aim to ascertain the capacity credit for a BESS with specified energy and power ratings. Unlike prior methods rooted in reliability theory, we define a power alignment function, which leads to a straightforward definition of capacity and incremental capacity for the BESS. We develop a solution method based on a linear programming formulation. Our analysis utilizes wind data, collected by NYSERDA off Long Island's coast and load demand data from NYISO. Additionally, we present theoretical insights into BESS sizing and a key time-series property influencing BESS capacity, aiding in simulating wind and demand for estimating BESS energy requirements.

翻译：风能在全球电网中的作用预计将显著扩大。仅纽约州就预计到2035年海上风电场（WFs）将贡献9GW的发电能力。储能系统的集成对这一发展至关重要。在本研究中，我们关注与配套电池储能系统（BESS）配对的风电场。我们的目标是确定具有特定能量和功率额定值的BESS的容量可信度。与先前基于可靠性理论的方法不同，我们定义了一个功率对齐函数，从而导出了BESS容量和增量容量的简明定义。我们开发了一种基于线性规划公式的求解方法。我们的分析利用了由纽约州能源研究与发展局（NYSERDA）在长岛海岸外收集的风数据，以及来自纽约独立系统运营商（NYISO）的负荷需求数据。此外，我们还提出了关于BESS容量配置的理论见解，以及一个影响BESS容量的关键时间序列特性，这有助于模拟风能和需求以估算BESS的能量需求。