LU Dongbin,LI Fengqi,YAO Qixin,et al.Analysis on Dead-zone Angle and Dead-zone Voltage for Tap Adjustment of HVDC Transmission Converter Transformer[J].Automation of Electric Power Systems,2023,47(24):165-174.
LU Dongbin,LI Fengqi,YAO Qixin,et al.Analysis on Dead-zone Angle and Dead-zone Voltage for Tap Adjustment of HVDC Transmission Converter Transformer[J].Automation of Electric Power Systems,2023,47(24):165-174. DOI: 10.7500/AEPS20230331002.
Analysis on Dead-zone Angle and Dead-zone Voltage for Tap Adjustment of HVDC Transmission Converter Transformer
The high-voltage direct current (HVDC) transmission system realizes the power regulation through rapid control of the triggering angle of converters. In addition
in order to expand the power regulation range and maintain the system in a good operation condition
the tap adjustment of converter transformer is also supplemented. The relationship between tap adjustment and angle change or AC voltage fluctuations from the rectifier side and the relationship between tap adjustment and DC voltage or AC voltage fluctuations from the inverter side are analyzed
respectively. The dead-zone setting principle for tap adjustment is proposed
which is to select an appropriate dead-zone angle or dead-zone voltage of the converter transformer tap based on the AC voltage fluctuation range of the actual AC system connected to the HVDC transmission system
in order to prevent reduced lifespan or even damage of the tap changer caused by tap reciprocating adjustment
and to avoid large fluctuations in reactive power and DC voltage.
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