Research on "Soft Start-up" of VSC-HVDC in Power System Restoration after Blackouts

It is very common to switch on a long no-load line in power systems. If nothing has been done, switching surge will appear instantaneously. In this paper, Voltage Source Converter (VSC) based HVDC (VSC-HVDC) technology is used in power system restoration to solve the problem of switching surge when...

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Bibliographic Details
Main Authors: Guangkai Li, Chengyong Zhao, Xingran Zhang, Gengyin Li
Format: Conference Proceeding
Language:English
Subjects:
EMTDC
HVDC transmission
long no-load line
overvoltage
Power conversion
Power system restoration
Power system simulation
PSCAD
PWM
soft start-up
Surges
Switches
Switching converters
switching surge
Voltage
VSC-HVDC
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Summary:It is very common to switch on a long no-load line in power systems. If nothing has been done, switching surge will appear instantaneously. In this paper, Voltage Source Converter (VSC) based HVDC (VSC-HVDC) technology is used in power system restoration to solve the problem of switching surge when switching on a long no-load line. Control strategies of VSC-HVDC are developed based on PI controllers. Simulation to start up a long no-load line has been conducted in three conditions respectively on software PSCAD/EMTDC. The simulation includes starting up a long no-load line without VSC-HVDC, starting up a long no-load line with VSC-HVDC when DC voltage reaches the rated value and "soft start-up" the long no-load line with VSC-HVDC. Simulation results show that "soft start-up" with VSC-HVDC can effectively reduce the switching surge when switching a long no-load line.
ISSN:2156-2318
2158-2297
DOI:10.1109/ICIEA.2007.4318748