Hierarchical Coordinated Fast Frequency Control Using Inverter-Based Resources
Hierarchical Coordinated Fast Frequency Control Using Inverter-Based Resources
复制标题
使用基于逆变器的资源的分层协调快速频率控制
DOI：
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复制
发表时间：
2021
影响因子：
6.6
通讯作者：
H. Hooshyar
中科院分区：
文献类型：
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作者：
Etinosa Ekomwenrenren;Zhiyuan Tang;J. Simpson;E. Farantatos;Mahendra Patel;H. Hooshyar
逆变器连接的可再生能源（RES）在电网中的份额正在增加，这些资源部分取代了传统的同步发电机。这已经导致增加的有功功率供应的可变性、减小的总惯性以及增加的惯性的空间异质性，从而导致更快的系统频率动态沿着更大和更频繁的频率控制事件。这些影响预计将成为越来越重要的电力系统控制在下一代电网，这可能是完全由可再生能源。为了缓解这些挑战，提出了一种快速的，基于区域的分层控制策略。该方案将电力系统划分为小区域，估计局部功率不平衡，并利用局部逆变器资源（IBR）进行校正。在本地没有足够资源的情况下，使用迭代分布式优化方案优先从电气近邻获取电力，该方案保护区域之间的信息隐私。所提出的频率控制架构可以改造到现有的控制系统，并允许灵活的量的模型信息提供给设计师。在两个详细的多区域电力系统模型上对控制策略进行了验证。仿真结果表明，该策略提供了快速和本地化的频率控制。
The share of inverter-connected renewable energy resources (RESs) is increasing in the grid, with these resources partially displacing conventional synchronous generators. This has resulted in increased variability of active power supply, reduced overall inertia, and increased spatial heterogeneity of inertia, leading to faster system frequency dynamics along with larger and more frequent frequency control events. These effects are expected to become increasingly more important in power system control in next-generation grids, which may conceivably be made up entirely of RESs. To mitigate these challenges, a fast, area-based hierarchical control strategy is proposed. This scheme partitions the power system into small areas, estimates local power imbalances, and corrects them by utilizing local inverter-based resources (IBRs). In cases where sufficient resources are not available locally, power is preferentially sourced from electrically close neighbours using an iterative distributed optimization scheme which preserves information privacy between areas. The proposed frequency control architecture can be retrofit onto existing control systems, and allows for flexibility in the amount of model information available to the designer. The control strategy is validated on two detailed multi-area power system models. Simulation results show that the strategy provides fast and localized frequency control.