This letter proposes a new way for including hard limits associated with control devices in the formulation of the transient stability problem. The inequality constraints representing hard limits are transformed into a set of equality constraints by using the concept of complementarity constraints and the Fisher-Burmeister merit function. This set of constraints are added to the rest of the equations representing the dynamics of an electric power system for a unified framework of analysis, where hard limits are simultaneously and automatically handled during the numerical solution of the transient stability problem.

中文翻译：

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考虑动态状态硬限制的瞬态稳定性评估

这封信提出了一种新方法，用于在瞬态稳定性问题的表述中包含与控制设备相关的硬限制。通过使用互补约束的概念和 Fisher-Burmeister 评价函数，将表示硬限制的不等式约束转化为一组等式约束。这组约束被添加到代表电力系统动力学的其余方程中，用于统一的分析框架，其中硬限制在瞬态稳定性问题的数值求解过程中同时自动处理。