Abstract
High direct (DC) voltages and currents are becoming increasingly important because of the increasing number of high voltage direct current (HVDC) transmission systems worldwide. Numerous other application fields exist in physics and technology, and DC voltages are also needed to generate impulse voltages and currents. The basic requirements for test and measurement methods for electrical power equipment are laid down in national and international test specifications. The introduction of digital measurement techniques with computer aided data processing has greatly improved the scope, quality and accuracy of the measurements. This marks the imminent end of the analogue circuits and instruments used so far, though analog measurement methods and devices, including the standard rod-rod gap, are still used. This chapter first defines the standardized measurement quantities of DC voltages and currents, briefly describes a few selected generator systems and then discusses in detail the predominantly used digital measurement circuits and methods with computer-aided data processing, allowing online monitoring and on-site tests.
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Schon, K. (2019). High Direct Voltages and Currents. In: High Voltage Measurement Techniques. Power Systems. Springer, Cham. https://doi.org/10.1007/978-3-030-21770-9_3
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DOI: https://doi.org/10.1007/978-3-030-21770-9_3
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