Control Strategy of UHVDC Project in Some Special Conditions

Control system is the 'brain' of UHVDC, which is based on the closed loop limiting matching mechanism of the GAMMA controller, voltage controller and current controller. Control characteristics and analysis method of UHVDC are studied in depth, which is under such special conditions as starting and stopping a pole, on-line exiting a valve group, AC voltage fluctuation and electromagnetic interface between the two poles. The analysis method and research results of this paper are helpful to analyze the control characteristics of UHVDC System under complex operating conditions, and have rich practical value.