Method to detect and protect industrial power converter systems from line-to-ground faults
Abstract
An Industrial-Power-Converter-System (IPCS) is a system made up of several power converters, such as Adjustable Speed Drives (ASD), filters, and any kind of reactive power-compensation components. Today, an IPCS requires the ability to accurately detect and isolate electric faults to avoid further compromise of the integrity of the whole system. One particular type of electric fault is the cable line-to-ground fault. Due to the complexity and asymmetry of IPCS, reliably detecting cable line-to-ground faults is a formidable task. Therefore, it is necessary to identify current/voltage signature uniquely linked to the occurrence of the fault; set a threshold; and construct a method that allows for identifying the faulted ASD in the IPCS. The method presented in this dissertation tracks low-frequency current sourced by the Common Mode Voltage (CMV) of the ASD. It is reliable, modular; and it can be extended to complex IPCS.
Degree
Ph.D.
Advisors
Sudhoff, Purdue University.
Subject Area
Engineering|Industrial engineering
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