Title :
High performance control of harmonic instability from HVDC link system
Author :
Min, Wan Ki ; Myeong Ho Yoo
Author_Institution :
Korea Electr. Power Res. Inst., Taejon, South Korea
Abstract :
This paper investigates the usefulness of a novel control method for a HVDC link system which suffers from a severe condition of low order harmonics. This control scheme uses the feedforward control method which is a directly controlled DC current at the DC link system. The studies of this paper are aimed at improving the dynamic response of a HVDC link system in disturbances such as faults. To achieve those objectives, digital time domain simulations are employed by the electromagnetic transient program for a DC system (EMTDC). This method results in stable recovery from faults at both rectifier and inverter terminal busbars for an inherently unstable HVDC system. It has been found to be robust and control performance has been enhanced
Keywords :
HVDC power convertors; HVDC power transmission; digital simulation; dynamic response; electric current control; feedforward; invertors; power system analysis computing; power system control; power system harmonics; power system stability; rectifying circuits; robust control; time-domain analysis; DC link system; DC system; HVDC link system; control performance enhancement; digital time domain simulations; directly controlled DC current; dynamic response improvement; electromagnetic transient program; feedforward control method; harmonic instability control; inverter terminal busbar; low order harmonics; rectifier terminal busbar; robust control; stable fault recovery; Analog-digital conversion; Communication system control; Control systems; Equations; HVDC transmission; Magnetic domains; Power system transients; Reactive power; Rectifiers; Voltage control;
Conference_Titel :
Energy Management and Power Delivery, 1995. Proceedings of EMPD '95., 1995 International Conference on
Print_ISBN :
0-7803-2981-3
DOI :
10.1109/EMPD.1995.500818
