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The increased application of HVDC components in electrical energy systems has led to new challenges in diagnostic testing and measurement of electrical insulation. In addition to other diagnostic methods Partial Discharge (PD) diagnosis at DC voltage is currently subject to much discussion worldwide. This is because the established and approved procedures, methods and evaluation techniques at AC voltages...
The high voltage diagnostics must follow the actual state of the industry devices and the problems related to diagnostics methods. One of the diagnostic methods necessary to be solved at this time is the partial discharge detection, diagnostics and analyses in HVDC systems. There is no standardized method for detection of partial discharges in HVDC systems supplied with DC voltage. The presented study...
The world of diagnostics has to keep up with the needs and possibilities today's world requires and offers. Everyone want to have the information they desire at the moment and, of course, at minimal cost. The world of diagnostics is no different. One tool that offers that is the online diagnostics. It has many benefits that allow, with proper usage of tools like CBM (condition based maintenance),...
Partial discharges proved to be important diagnostic parameter during technical lifetime of operated electrical machines. Until now PD phenomena was well described and understood in technical society, especially for characteristic arrangement, e.g. corona, tip to plane, sphere to plane, and others. Most of the studies were done under AC voltage. However as DC transmission is concerned, more attention...
Measurement of partial discharges is one of the main nowadays used methods of diagnosis of electrical devices. Generators, transformers, cables and transmission lines are especially tested on the presence of PDs. New standards are being developed for the PD measurement under high frequency, for UHF measurement methods, etc. As the situation in transmission of electrical energy changes to long distance...
Partial discharge measurement and subsequent analyses is one of important and capable test of electro-technological diagnostics. This test evaluates the properties of electrical insulation system of electrical machines and devices. There are a lot of partial discharge test methods based on physical or chemical detection of partial discharge. Described experiment consists of laboratory testing of partial...
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