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The continuing growth of energy from renewable resources demands for structural changes of energy transmission systems. These changes are on the one hand related to the increasing decentralized power generation and on the other to different power flow scenarios due to fluctuation in power generation. For example, offshore wind parks require a high transmission capacity over long distances. In order...
The integration of decentralized renewable energy sources leads to a changed load profile of electrical power engineering utilities such as generators, transformers etc. A decreased application of thermal power plants as primary supply of electrical energy results in progressive energy transition and rising load dynamics. Frequent start-up processes etc. lead to rapid changes in the operation conditions...
Due to the rising number of DC transmission systems there is an increasing interest in partial discharge (PD) diagnostics at DC voltage. Under AC stress there are several established instruments to get evidence of the type and the location of the defect, most important the phase angle histogram. Under DC stress there are no such methods available up to now and therefore new interpretation techniques...
Partial Discharge (PD) detection and diagnostics is an established tool to test the condition of the insulation in HV-facilities. One basic question while performing PD measurements is the one concerning the type and location of the defect. Under AC stress there are several instruments to interpret the measured PD, most important the phase angle histogram. At DC voltages this approach is inapplicable...
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