Construction and research of characteristics of the high voltage direct current standard
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Full Text |
Pdf
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Author |
Oleh Velychko and Ruslan Vendychanskyi
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e-ISSN |
1819-6608 |
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On Pages
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121-131
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Volume No. |
20
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Issue No. |
3
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Issue Date |
March 21, 2025
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DOI |
https://doi.org/10.59018/022524
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Keywords |
high voltage, direct current, measurement, calibration, measurement standard.
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Abstract
High voltage (HV) power transmission is standard practice in modern power engineering due to its numerous advantages, the main of which is the reduction of energy losses and increased transmission efficiency. HV direct current (DC) transmission lines allow the transmission of electricity over long distances with greater power and lower losses than HV alternating current transmission lines. Accurate voltage measurement is necessary for monitoring and controlling HVDC lines to avoid overloads and equipment damage. Voltage measuring transformers, resistive and capacitive voltage dividers; electrostatic voltmeters, digital voltmeters with special converters are used to measure HVDC. National standards and working standards have been created to calibrate such HVDC measuring instruments. Research the metrological characteristic of the national standard of HVDC is necessary to continuously maintain metrological traceability of HVDC measurements on a national level. Technical and metrological characteristics have been established for the constructed HVDC standard and its main components. These characteristics are regularly researched using specially developed methodology. This methodology examines the low voltage blocks and the compiled measure of stationary and mobile parts of the HVDC standard. The results of the research of compiled measures and low-voltage blocks of the stationary part of the HVDC standard confirm the correctness and stability of the established characteristics of the standard. Deviation of actual value of voltage of compiled measure from the nominal value of 1,000 V does not exceed ±1.3 V (0.13%). The long-time instability of actual voltage of compiled measures of 10,000 V does not exceed ±0.13 V (0.013%). The obtained values of the main metrological characteristics of the standard are confirmed by the results of international comparisons of similar national standards. This ensures metrological traceability of HVDC measurements at the national level.
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