engleski

Statistical Analysis and Grouping of Measured Power Transformer Overvoltages

Nowadays, more and more renewable energy sources, together with power electronics are installed in the power networks worldwide. This leads to complex situations in the networks that have to be analyzed and monitored. One of the main problems in such networks are the overvoltages that may cause failure of the equipment, in particular power transformers. Therefore, it is necessary to assess this problem with outmost care. In this paper, a methodology for power transformer overvoltages management based on field measurements and advanced electromagnetic transients (EMT) modelling is presented. It consists of simulating overvoltages using detailed power network models, including the high frequency transformer models and continuous monitoring of overvoltage events at the places of interest in the power network. This work gives a framework for dealing with overvoltages in the power network that could be implemented by power utilities.

Power transformer ; overvoltages ; high frequency ; EMTP ; modelling ; asset management ; field measurements

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