Magazine | Issue 1 2024 Image 1: Damaged voltage transformer after an explosion In an electrotechnical sense, a CVT equates to a resonant circuit, which is why the theory of resonant circuits can be used to solve the equation system. The precise measurement method and mathematical procedure are patented and can be found in our IEEE paper, which we refer to in greater detail below. Although the problem was theoretically solved, it took a lot of work to develop a functioning practical measurement. We started with a fundamental procedure using the first measurements and a simple calculation program. The initial results were encouraging, so the method was implemented in VOTANO 100. After the team fiddled about in the lab for hours, they understood the background better and were able to perform comparison measurements with a broad spectrum of test objects. Finally, we performed field tests at various manufacturers, including Mexico and Columbia, showing that our results are comparable with standard measurement methods. Then, we wrote an IEEE paper on this basis: A new method for determining the C-divider capacitances of a Capacitor Voltage Transformer with frequency measurements (Bischof, Gopp, Atlas), 2023 IEEE PES GTD International Conference and Exposition (GTD) ieeexplore.ieee.org/document/10261719 Developing this new measurement method, from the idea through theoretical considerations to performing functioning, practical measurements on a wide variety of test objects, was a very challenging undertaking. We want to thank everyone involved for their support, especially the companies who generously provided test objects for the field tests. LISTEN TO THE PODCAST Interested in this topic? Check out our Podcast, where you can find this miniseries and other exciting episodes with all kinds of topics related to power system testing, data management, and cyber security in the power industry. Scan the QR-Code or visit: omicron.energy/episode77 41
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