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Steady-state operation of 110 kV power line
Pastorek, Jaroslav ; Bok, Jaromír (referee) ; Blažek, Vladimír (advisor)
This Bachelor's thesis addresses the steady operation of 110 kV power lines. It is well known that these lines are used within the distribution system of very high voltage levels and are used to transfer large amounts of energy over long distances. The essential prerequisite for the transfer of such an amount of energy is to achieve the greatest efficiency possible. Therefore, there are methods developed, by which under known circumstances on one end of the line we can calculate the line ratios at the other end. These methods can be classified into exact, approximate and graphic methods. With approximate methods, T – element and ? – element, the most popular ones, are used. Only a brief description of the graphic method is given. Before the calculations of these methods, a procedure for determining various parameters of the external line is described. In the practical part, calculations based on the given example are listed. The example addresses calculation of ratios at the start of the line and ratios during short-circuit and freewheeling operation. The end contains a brief summary and comparison of the results. 100 kV lines can be either designed either as buried cables or external lines hanging from pylons. Buried cables are rarely used for 100 kV, so this Bachelor's thesis is focused on external lines.
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