Customized Wavelets for Analysis of Fault Transients in Power Systems

这项研究的目的是研究小波设计，以优化其性能在电力系统的具体应用。研究的另一个目标是开发一种能够准确地表示频率相关参数的时域传输线模型，并将其集成到时域暂态仿真程序中。方法是首先通过使用诸如电磁暂态程序之类的模拟器来集中精力创建一系列电暂态信号。将识别每种类型的瞬变的特征，以便定义由小波表示的主要属性。一旦识别出信号特征，就可以通过选择合适的二叉树结构并针对其滤波格参数优化母小波/尺度函数来构造正交镜像滤波小波/波包正交基。智能优点该项目通过根据电网的特定特性定制母小波，提高了对小波变换用于电力系统暂态分析领域的知识和理解。更广泛的影响该项目的结果将通过实现准确可靠的故障定位，显著提高国家电网运行的可靠性。这将通过最大限度地减少意外停电的持续时间来节省成本。该项目还将培训两名研究生，他们将在本科实验室课程中教授开发的材料。该项目的成果将作为期刊出版物散发。该项目还将让来自代表性不足群体的本科生使用REU补充资金。

The objective of this research is to investigate the wavelet design for optimizing its performance for specific applications in power systems. Another objective of the research is to develop a time-domain transmission line model that can represent frequency dependent parameters in an accurate manner and to incorporate it into a time-domain transient simulation program. The approach is to first concentrate on creating a family of electrical transient signals by using a simulator such as the electromagnetic transients program. The characteristics of each type of transient will be identified in order to define the main properties to represent by a wavelet. Once the signal characteristics are identified, a quadrature mirror filter wavelet/wavepacket orthogonal basis will be constructed by selecting an appropriate binary tree structure and optimizing the mother wavelet/scaling function with respect to its filter lattice parameters. Intellectual MeritThe project advances the knowledge and understanding in the area of wavelet transforms when used for power system transient analysis by customizing the mother wavelet to specific characteristics of power networks. Broader ImpactsResults of the project will lead to significant reliability improvements in the operation of the nation's power grid by allowing accurate and reliable fault location. This will produce cost savings by minimizing the duration of unexpected power outages. The project will also train two graduate students who will teach the developed material in the undergraduate laboratory classes. The results of the project will be disseminated as journal publications. The project will also involve undergraduate students from under-represented groups using REU supplemental funds.