|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|5001195||1368412||2017||8 صفحه PDF||ندارد||دانلود کنید|
â¢Artificial short circuit experiment is conducted on an operating Â±800Â kV system.â¢Broadband impedances and stray parameters of the major UHVDC equipment are measured.â¢The wideband frequency transfer characteristics of converting system are investigated.
Due to the wide application of high-order resonant and nonlinear electric equipment in the UHVDC converter station, the electromagnetic transient process is a complex issue during the short-circuit fault transient of the system caused by lightning strike or other reasons. In this study, firstly, an operating Â±800Â kV DC line is artificially short-circuited to simulate the flashover fault process. The instantaneous voltages and currents and the electrical fields are measured by advanced sensors and high sampling rate recording devices at different points in the converter station, in order to comprehensively study the high-frequency characteristics of the UHVDC system. Then, the portal impedances of the major UHVDC equipment as well as the stray parameters are systematically measured in an actual Â±800Â kV station. Based on the data measured, the accurate high-frequency characteristics of the Â±800Â kV converter station are analyzed. The results of the study can be used to guide the EMC and relay protection designs of the UHVDC converter station, so that the stability of the system can be improved.
Journal: Electric Power Systems Research - Volume 147, June 2017, Pages 302-309