POWRE: Wavelet Decomposition of Inrush and Arc Currents

ECS-9870456 电力变压器对大电流（称为电弧电流）的保护通常基于差动继电器。 这些继电器用于20 MVA及以上的变压器，约占该国配电变压器的40%。 这些变压器的保护是重要的，因为更换这种Transformer的成本是每千伏安1 -5美元。 虽然这些继电器确实提供保护，但在应用中存在很大的困难。 本研究的目的是开发一种新的和复杂的信号处理算法的基础上小波，将可靠地检测内部故障的方式，将提供快速检测不受浪涌电流。 小波理论的简要回顾提供了沿着一些初步的模拟结果。 它示出，小波，沿着与百分比能量包含在某些时间频率瓦片，显示手头的任务的承诺。 拟议的研究有两个主要阶段。 第一阶段是开发区分浪涌电流和电弧电流的算法。 第二阶段是设计和测试一个原型系统，该系统将以尽可能接近工业设置的方式实现第一阶段开发的算法。 PI计划将她在材料和信号处理领域的优势和专业知识带到电力系统中，这可以从她的知识中受益。 一个电源补助金将提供必要的设备，用品和时间，以帮助保持PI集中在她的新的研究企业

ECS-9870456 Nicoletti Protection for power transformers against large currents, known as arc currents, is commonly based on differential relays. These relays are used on transformers of the size 20 MVA and up, which accounts for approximately 40% of the transformers used in electricity distribution in this country. The protection of these transformers is important because the cost of replacing such a transformer is $1-5 per kVA. While these relays do offer protection, there are substantial difficulties in application. The aim of this research to is to develop a new and sophisticated signal processing algorithm based on wavelets that will reliably detect internal faults in a way that will provide rapid detection not effected by inrush currents. A brief review of the theory of wavelets is provided along with some preliminary results of simulations. It is shown that wavelets, along with percentage energy contained in certain time-frequency tiles, show promise for the task at hand. The proposed research has two major phases. Phase I is the development of algorithms that will distinguish inrush versus arc currents. Phase II is the design and testing of a prototype system that will implement the algorithms developed in Phase I in a way that is as close to the industrial set-up as possible. The PI plans to bring her strengths and expertise from the materials and signal processing areas into the electrical power systems which can benefit from her knowledge. A POWRE grant will provide the essential equipment, supplies and time to help keep the PI focused in her new research ventures