SmartGrid solutions are often misinterpreted as complex approaches requiring large amounts of (online) data and computational power for delivering high-quality results. With today's technology, this is surely the most obvious and technically achievable approach for dealing with complex problems. However, by taking this road in the power system field, providing the required high-level reliability becomes a challenging task. Therefore, a thorough consideration of whether increased complexity justifies the gains is surely warranted, especially when it comes to power system protection, where the applied procedures are all about transparency, simplicity and robustness – which is often in contrast to the above interpretation of SmartGrids. Therefore, the motivation of the presented research was to design an effective SmartGrid solution for avoiding power system frequency instability, appropriate for real-life application. Under-frequency load-shedding protection is the subject of many research activities that often result in complex and, consequently, unfeasible suggestions. In contrast, this paper presents an effective RoCoF-based upgrade to the conventional approach, eliminating its most important shortcoming: inflexibility. By estimating frequency stability margin in real time, shedding decisions remain local, whereas the overall efficiency of this system protection scheme is brought to the level of the most sophisticated solutions available in the literature.

SmartGrid解决方案通常被误解为复杂的方法，需要大量（在线）数据和计算能力才能提供高质量的结果。对于当今的技术，这无疑是解决复杂问题的最明显且技术上可实现的方法。然而，通过在电力系统领域走这条路，提供所需的高级别可靠性成为一项艰巨的任务。因此，确实有必要对增加的复杂性是否足以证明收益进行透彻的考虑，尤其是在电力系统保护方面，其中所应用的过程全部是关于透明性，简单性和鲁棒性的，这通常与以上对SmartGrids的解释形成对比。所以，提出的研究的动机是设计一种有效的SmartGrid解决方案，以避免电源系统的频率不稳定，适合现实生活中的应用。低频降载保护是许多研究活动的主题，这些研究活动通常会产生复杂的建议，因此是不可行的。相比之下，本文提出了一种有效的方法基于RoCoF的对传统方法的升级，消除了其最重要的缺点：灵活性不足。通过实时估计频率稳定性裕量，脱落决策仍然是局部的，而该系统保护方案的整体效率达到了文献中可用的最复杂解决方案的水平。