DEVELOPMENT OF AN ALGORITHM FOR THE STUDY OF POWER SYSTEM GROUNDING
1 online resource (96 pages) : PDF
University of North Carolina at Charlotte
It is commonly known that when using electronic equipment, both personnel and equipment need to be protected from high power transients. In order to ensure safety and prevent equipment damage, a grounding system must be used to provide a low resistance path to ground. The grounding system is essential to complete an electrical path to ground if there is non-designed or unanticipated above-normal potential current or voltage surges during operating conditions. The goal of the thesis involves obtaining the short circuit current from a given large scale system and attaching the subsystem with a desired type of grounding method according to the user’s choice. The first part of the thesis is on developing programs that consists of 4 types of grounding protection: High-resistance neutral grounding, High-resistance grounding with three distribution transformers, Low-impedance grounding, and Solid grounding. To protect the system from the fault, the user has 4 options of grounding protection systems available for analysis and can make a required selection. The second part of the thesis is on large scale analysis i.e., short circuit analysis as final needed results for the subsystem grounding. This is technically, the base of the thesis which is used to calculate the short circuit currents on the large scale system at the location of the fault. The Z-bus calculation has been automated and used to calculate the Thevenin’s equivalent circuit and fault currents. Large scale system at the point of short circuit is connected to our system and is analyzed from the grounding point of view. These above obtained short circuit and Thevenin’s equivalent values are used in the subsystems by the user to select the required type of grounding system method.
Cecchi, ValentinaMiri, Mehdi
Thesis (M.S.)--University of North Carolina at Charlotte, 2016.
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