孤岛和并网模式下提供辅助服务的有源配电网
Active Distribution Grids offering Ancillary Services in Islanded and Grid-connected Mode
摘要：
未来的有源配电网（ADG）将包含大量的分布式发电机（DG）和其他分布式能源（DER），使它们能够在并网模式下提供辅助服务，并在必要时以孤岛模式运行，以提高可靠性和弹性。在本文中，我们调查的ADG提供频率控制（FC）在并网模式，并确保可靠的孤岛运行一个预先指定的时间段的能力。首先，我们制定了一个集中的多期最优潮流问题，滚动时域为24小时的电网参与欧洲型FC市场的操作。然后，我们包括约束的并网运行的问题，以保证在每个时刻切换到孤岛运行的能力。最后，我们探讨了在平衡的低压配电网上提供这些服务的技术和经济可行性。结果表明，该方案能够提供和响应不同的FC产品，同时确保在孤岛模式下每个时间步长都有足够的能量容量满足临界负载。
英文摘要：
Future active distribution grids (ADGs) will incorporate a plethora of Distributed Generators (DGs) and other Distributed Energy Resources (DERs), allowing them to provide ancillary services in grid-connected mode and, if necessary, operate in an islanded mode to increase reliability and resilience. In this paper, we investigate the ability of an ADG to provide frequency control (FC) in grid-connected mode and ensure reliable islanded operation for a pre-specified time period. First, we formulate the operation of the grid participating in European-type FC markets as a centralized multi-period optimal power flow problem with a rolling horizon of 24 hours. Then, we include constraints to the grid-connected operational problem to guarantee the ability to switch to islanded operation at every time instant. Finally, we explore the technical and economic feasibility of offering these services on a balanced low-voltage distribution network. The results show that the proposed scheme is able to offer and respond to different FC products, while ensuring that there is adequate energy capacity at every time step to satisfy critical load in the islanded mode.
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