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the unified dynamic rate system of generation and transmission based on technology of condition monitoring for overhead transmission line was introduced. Theories, components and structure of the system were analyzed. Condition monitoring technique and primary constrain condition applied in the system were discussed. The technical economy was proved in theory. The field test results and effects during...
Electrical aging of polymer insulated power cables has been an important subject of investigation in the last several decades. Cable insulation is placed under heavy electrical stress due to overvoltages occurring during switching operations taking place in the power system. Transients overriding the normal ac operation voltage are some of the most hazardous conditions for cable insulation life. Although...
Medium voltage power cables are manufactured with various insulating materials. Ethylene Propylene Rubber (EPR) is one of the most common materials used in cable insulation among them. It is known that power cables in service are subjected to moisture due to wet environment which may reach the insulation and accelerate environmental aging of insulation. In the experiments set for this study, the accelerated...
During the operation of power system, the insulation of high voltage extruded cables will be placed under high electrical stress, including overvoltages caused by switching surges. In the study, 15 kV XLPE and EPR power cable samples are energized by switching impulses. The aging phenomena of cable insulation are observed by the measurement of partial discharge level and AC breakdown voltage during...
The electrical degradation of cable insulation in distribution lines is due to the electrical stress caused by switching surges. During the operation, the insulation of power cables will be placed under high electrical stress, including overvoltages caused by switching. The status of power cable insulation aging is evaluated by the measurement of partial discharge level and AC breakdown voltage. The...
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