| Title |
Study on the Measurement and Signal Correction of Space Charge Distribution in Multi-dielectrics |
| Authors |
김형규(Hyung-Gyu Kim) ; 정현철(Hyun-Cheol Jung) ; 박준도(June-Do Park) ; 황보승(Seung-Hwangbo) |
| DOI |
https://doi.org/10.5370/KIEE.2019.68.11.1368 |
| Keywords |
Space Charge; PEA Method; Multi-dielectrics; Deconvolution; Signal Processing |
| Abstract |
In recent year, as the demand for large-scale power transmission and DC cables has increased due to the connection between inter-country grid and offshore wind power generation around the world, high voltage direct current (HVDC) cables have been extensively studied. However, as for long-distance transmission, such as for power grid and offshore wind power generators, a DC high voltage is continuously applied to the internal insulator of the cable, there is a high probability of insulation breakdown due to space charge. The cable connection box consists of several dielectrics and due to the presence of interfaces between adjacent dielectrics, distortion of the electric field occurs, and various problem such as electrical insulation occur. In this study, the Pulsed-Electro-Acoustic (PEA) method is used to measure multi-dielectric space charge distribution signals and a new signal processing algorithm is developed. we use the deconvolution method whereby the original signal is restored using the measured signal and the system response function, this method is an algorithm widely used to obtain the reliability of the signal. We developed a program using signal processing algorithm and LabVIEW S/W, and successfully corrected the measurement signal. |