engleski

Long Term Partial Discharge Test Automation

Since the insulation defects, design miscalculations and material im-perfections in electric equipment lead to partial discharge, the detection of these discharges can be used not only to evaluate the insulation condition, but also to improve the production process of electric equipment. Therefore, these tests are often used in research and development departments. However, the procedure is usually time-consuming and can occupy significant human resources. Moreover, in repeated tests the human error can become apparent. As a solution to this prob-lem, automation of the tests presents itself as the solution. In this paper, an auto-mated system for detection of partial discharges in oil-paper insulation under al-ternating voltage is described. The automation test system consists of multiple control and acquisition subsystems. To keep the same test conditions in multiple tests, a heat insulated test tank with oil heaters is made for the regulation of oil and model temperature. Also, a voltage control system is implemented, which can raise and continuously regulate the test voltage, as well as rapidly switch off the voltage in case of partial discharge events to protect the test object. In high voltage tests the automation safety is a crucial factor, therefore measures are taken to prevent and detect equipment failure. Furthermore, communication of the automation system with the test engineer is enabled via status email messages, data logging and test recording. The above-mentioned system can follow the given test procedure and perform the experiments in place of the test engineer. The whole process is designed as a stand-alone automated test bed which can run continuously and independently for days.

High Voltage Test Automation, Oil-Paper Insulation, Partial Dis-charge, Voltage Regulation

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