Study on Dynamic Security Preventive Control of Power Systems

本研究的主要目的是：（1）快速暂态稳定评估方法和能够考虑暂态稳定的预防控制方法;（2）自动事故选择的安全指标。我们的研究结果总结如下。(1)提出了一种基于线性化潮流模型的快速暂态稳定仿真方法。该方法的计算速度约为传统方法的1100倍，为电力系统暂态稳定评估和预防控制提供了一种模式识别方法。(2)安全性指标利用过电压和越限电压的向量范数定义了一种新的事故选择安全性指标。随后，它使可能的事故分析，同时考虑线路过载和母线电压限制的冲突和排序进行分析。将该方法应用于IEEE 30节点系统，验证了该方法的有效性。(3)为了考察动态安全预防控制与真实的功率控制之间的相互作用，

The main object of this research is to develop,(1)a method for fast transient stability assessment and a preventive control method being able to take into account transient stability, (2) a security index for automatic contingency selection. Our research results are summarized as follows.(1) Fast transient security Assessment and preventive controlA fast transient stability simulation method based onaa linearized load flow model was developed. The computing speed of this method is about 1100times as fast as that of the conventional method.A pattern recognition method for transient stability assessmentaand preventive control was satisfactorily developed.(2) Security indexA new security index for contingency selection was defined by the vector norm of overloading and out-of-limit voltages. Subsequently, it makes possible the contingency analysis considering both line overloading and bus voltage limit violation and the ranking of contengency to be analized. Appling this method to the IEEE 30 bus system, the effectiveness of the method was confirmed.(3) OthersIn order to inspect the inter-action between dynamic security preventive control and real power control,an optimal scheduling method for the daily power system