Study on Dynamic Security Preventive Control of Power Systems

本研究的主要目的是：(1)发展一种快速暂态稳定评估方法和一种能够考虑暂态稳定的预防控制方法；(2)一种用于事故自动选择的安全指标。(1)快速暂态安全评估与预防控制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。该方法的计算速度是传统方法的1100倍左右，成功地建立了一种用于暂态稳定评估和预防控制的模式识别方法。(2)安全指标由过载和超限电压向量范数定义了一种新的事故选择安全指标。在此基础上，对同时考虑线路过载和母线电压越限的故障分析和相容排序进行了分析。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实际功率控制之间的相互作用，提出了一种日常电力系统优化调度方法

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