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Online Application of Local OOS Protection and Graph Theory for Controlled Islanding

机译：本地OOS保护与控制岛屿理论的在线应用

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摘要

Despite layers of protection at work, power systems have experienced major blackouts in the past due to cascading outages. Such outages can be prevented with controlled islanding, which consists of two problems: "when" and "where" to island. The majority of the existing offline and real-time methods for the "when" aspects are based on wide area measurement systems (WAMSs), which depend on the system topology to perform periodic offline simulations or real-time computation of dynamic system equivalents. In this paper, a simplified "when" approach is proposed based on local generator out-of-step (OOS) protection and generator coherency using fault location. The novelty of the work lies in the use of local OOS protection relays to identify the overall system instability, which eliminates the need for WAMS communication and the complex computation required in real-time methods to form dynamic system equivalents. As this approach does not require any equivalent networks, the methodology is independent of system topology. Unlike existing WAMS-based methods, the proposed methodology simplifies the communication between the central "when" unit and each generator's OOS protection relay using status flags communicated with the IEC 61850 R-GOOSE protocol. The proposed "when" methodology is combined with the "where" method based on graph theory to test the overall controlled islanding scheme in the IEEE 39-bus system using the real-time digital simulator (RTDS).
机译：尽管在工作中的保护层，但由于层叠的停电，电力系统经历了过去的重大停电。这种中断可以防止受控岛屿，这包括两个问题：“当”和“在”到岛屿时。 “当”方面的大部分离线和实时方法基于广域测量系统（WAMS），这取决于系统拓扑，以执行定期离线模拟或动态系统等同物的实时计算。在本文中，基于本地发生器超步（OOS）保护和使用故障位置的发电机一致性提出了一种简化的“当”方法。该工作的新颖性在于使用本地OOS保护继电器来识别整体系统不稳定，这消除了WAMS通信的需求和实时方法所需的复杂计算，以形成动态系统等同物。由于这种方法不需要任何等效网络，因此该方法独立于系统拓扑。与现有的基于WAMS的方法不同，所提出的方法简化了中央“当”单位和每个发电机的OOS保护继电器之间的通信，使用与IEC 61850 R-GoOSE协议通信的状态标志。建议的“当”方法“与基于曲线图的”其中“方法相结合，使用实时数字模拟器（RTD）测试IEEE 39总线系统中的整体受控岛地方案。

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