S. A. Saleh;A. Jee;J. Meng;E. Ozkop;S. Panetta;D. Mohla;B. Nahid-Mobarakeh
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引用次数: 0
Abstract
The grounding system for a variable-frequency electric motor drive (VFD) is typically designed to enhance the continuity of operation, limit ground fault currents, limit transient over-voltages during ground faults, improve safety, and reduce or eliminate common-mode voltages (CMVs). The majority of VFDs utilize power transformers to provide isolation between the VFD and its supply, and operate as the point-of-supply to the front-ac-dc power electronic converter (PEC). Grounding system designs for VFDs have been a subject of several standards, industrial codes, and recommended practices. This paper analyzes the performance of impedance grounding systems (during steady-state and fault conditions), when utilized in VFDs. Analyzed grounding systems are the low-resistance, and high-resistance grounding systems. The performance of analyzed grounding systems is evaluated based ground currents, ground potential, and CMVs. Several experimental tests are also conducted to draw conclusions and suggest recommendations for an adequate impedance grounding for industrial VFDs.
期刊介绍：
The scope of the IEEE Transactions on Industry Applications includes all scope items of the IEEE Industry Applications Society, that is, the advancement of the theory and practice of electrical and electronic engineering in the development, design, manufacture, and application of electrical systems, apparatus, devices, and controls to the processes and equipment of industry and commerce; the promotion of safe, reliable, and economic installations; industry leadership in energy conservation and environmental, health, and safety issues; the creation of voluntary engineering standards and recommended practices; and the professional development of its membership.
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