Groundings and Grounding Systems in Power Networks

Course title: Groundings and Grounding Systems in Power Networks

Code: 3ФЕИТ09Л011

Number of credits (ECTS): 6

Weekly number of classes: 3+2+0+0

Prerequisite for enrollment of the subject: None

Course Goals (acquired competencies): Understanding the dangers of touch and step voltages in accordance with the regulations in the country and the world, as well as capacity for calculation, sizing and design of grounding and grounding systems.

Total available number of classes: 180

Course Syllabus: Introduction. Field of study. Basic features of groundings and grounding systems in power networks. Grounding modeling. Interactions with nearby groundings. Numerical solution of  grounding configurations. Application of software tools. Overhead lines as elements of the grounding system. Grounding of the towers and transformer stations for high and medium voltage. Typical solutions and their characteristics. Impulse impedances. Grounding model of a transmission line, approximate and detail modeling. Reduction factor. Power cables as elements of the grounding system. Model with distributed parameters and equivalent pi-circuit. Reduction factor. Transferred potentials. Complex grounding systems in high voltage transmission networks. Calculation of voltages and current distribution under ground fault. Grounding systems of medium voltage distribution networks, possibilities for neutral grounding, common practice, recommendations and technical regulations. Modern numerical techniques for gr.

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