Title :
A VSC-HVDC fuzzy controller for improving the stability of AC/DC power system
Author :
Li, Sheng ; Zhang, Jianhua ; Shang, Jingfu ; Wu, Ziping ; Zhou, Mingxia
Author_Institution :
Key Lab. of Power Syst. Protection & Dynamic Security Monitoring & Control under Minist. of Educ., North China Electr. Power Univ., Beijing
Abstract :
This paper puts forward an auxiliary fuzzy logic controller for the Voltage Source Converter based HVDC transmission system, VSC-HVDC, to improve the stability of the AC/DC system by damping the oscillation effectively after disturbance. The fast control capability of the VSC-HVDC and the process of area mode oscillations are analyzed. No detailed model of the system is required for the design of the proposed control scheme. The controller judges the operation states and the control effect and accordingly adjusts its active power order in an adaptive way by using fuzzy rules, so as to damp out the area mode oscillation. Simulation results on the IEEE 4-generator AC/DC power systems have shown that the controller can enhance the dynamic stability of interconnected power systems effectively and is robust to the variation of system operating conditions and oscillation modes.
Keywords :
HVDC power convertors; HVDC power transmission; damping; fuzzy control; power system interconnection; power transmission control; stability; AC/DC power system; HVDC transmission system; VSC-HVDC; active power order; area mode oscillations; fuzzy logic controller; interconnected power systems; voltage source converter; Control systems; Converters; Fuzzy control; Fuzzy systems; Power conversion; Power system dynamics; Power system interconnection; Power system simulation; Power system stability; Robust stability; VSC-HVDC; fuzzy logic control; tie-line oscillation;
Conference_Titel :
Electrical Machines and Systems, 2008. ICEMS 2008. International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-3826-6
Electronic_ISBN :
978-7-5062-9221-4
