NDLI: Mechanism analysis and suppression of overvoltage on DC side of ASVG under driving pulses blocking operation

Content Provider	IEEE Xplore Digital Library
Author	Liang Xu Liu Wenhua Jiang Qirong Ji Yong Fang Zhimin Chen Xizheng
Copyright Year	2000
Description	Author affiliation: Dept. of Electr. Eng., Tsinghua Univ., Beijing, China (Liang Xu)
Abstract	In order to enhance the operating reliability of ASVG (advanced static VAr generator), the "driving pulses blocking operation mode" is put into use which means that when blocking the conduction of switching components (GTO), the main switch connecting the ASVG to the power system keeps closed. For the configuration of large capacity ASVG based on multiple inverters, the mechanism of overvoltage on the DC side under driving pulses blocking operation mode is researched. With the help of a large amount of field tests and principal analysis, it is illustrated that overvoltage is caused mainly by the harmonic voltages on no-load transformers. The harmonic voltages are a result of harmonic magnetic flux caused by magnetic saturation of the transformer and complicated magnetizing circuit required by harmonic voltage elimination strategy. On the basis of mechanism research and circuit calculation, a simple countermeasure of suppressing overvoltage on the DC side is put forward. "Driving pulses blocking operation" is successful on a 300 kVAr ASVG.
Starting Page	2904
Ending Page	2909
File Size	424068
Page Count	6
File Format	PDF
ISBN	0780359356
DOI	10.1109/PESW.2000.847346
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-01-23
Publisher Place	Singapore
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Voltage control Power system harmonics Power system reliability Pulse power systems Magnetic flux Switches Pulse transformers Saturation magnetization Reactive power Power generation
Content Type	Text
Resource Type	Article

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