Title :
Energy storage based LVRT and stabilizing power control for direct-drive wind power system
Author :
Wang, Wenliang ; Ge, Baoming ; Bi, Daqiang ; Qin, Ming ; Liu, Wei
Author_Institution :
Guo Dian United Power Technol. Co. Ltd., Beijing, China
Abstract :
To enhance low voltage ride through (LVRT) capability and stabilize output power of direct-drive permanent magnet wind power system, a new type of vanadium redox flow battery (VRB) based energy storage system (ESS) is added at DC-link bus of dual-PWM converters. Correspondingly, the control strategy of bi-directional DC/DC converter is developed to manage the VRB. VRB-based ESS can be used to improve LVRT capability effectively when the grid voltage sags and smooth the grid-injected power when the wind speed rapidly changes. The simulated model is established to analyze the operation characteristics in detail. The results show that the performances of the grid-connected operation are effectively improved for the direct-drive wind power system by using VRB-based ESS at DC-side, and the dynamic response is fast.
Keywords :
DC-DC power convertors; PWM power convertors; dynamic response; permanent magnet machines; power control; power generation control; power supply quality; secondary cells; wind power plants; DC-link bus; bi-directional DC-DC converter; direct-drive permanent magnet wind power system; dual-PWM converters; dynamic response; energy storage system; grid voltage sags; low voltage ride through capability; stabilizing power control; vanadium redox flow battery; Bidirectional control; Converters; Current measurement; Lead; Medical services; Saturation magnetization; LVRT; VRB; direct-drive; energy storage; permanent magnet synchronous generator; wind power;
Conference_Titel :
Power System Technology (POWERCON), 2010 International Conference on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4244-5938-4
DOI :
10.1109/POWERCON.2010.5666732
