Title :
A LVRT method for wind power PMSG system with Z-source inverter
Author :
Qu, Keqing ; Zhou, Hao ; Xing, Yuehong ; Ding, Zuojin ; He, Ningyi
Author_Institution :
Shanghai Univ. of Electr. Power, Shanghai, China
Abstract :
The Z-source inverter employs a unique impedance network to couple the converter main circuit to the power source, it can provide a shoot-through state of inverter bridges to boost voltage, and make it suitable for a wind PMSG grid-connected system. The operation principle of Z-source converter is analyzed. An Active & Reactive power decoupling method is proposed for a double closed-loop control system, which ensures the stability of voltage of the Z-source network capacitor. In order to enhance the low voltage ride-through(LVRT) capability, a combined protection and control strategy including Pulse Block, Battery Energy Storage System, Reverse Power Tracking are proposed. Simulation results demonstrate rapid response of the double closed-loop decoupling method, the effectiveness of the combined protection and control strategy.
Keywords :
bridge circuits; closed loop systems; invertors; permanent magnet generators; power convertors; power generation control; power generation protection; reactive power; synchronous generators; voltage control; wind power plants; LVRT method; Z source converter; Z source inverter; Z source network capacitor; battery energy storage system; closed loop decoupling method; control strategy; converter main circuit; double closed loop control system; grid connected system; impedance network; inverter bridge; low voltage ride through capability; permanent magnet synchronous generator; protection strategy; pulse block; reactive power decoupling method; reverse power tracking; voltage booster; wind power PMSG system; Capacitors; Inverters; Power quality; Reactive power; Voltage control; Voltage fluctuations; Wind turbines; LVRT; PMSG; Z-source inverter; double closed-loop decoupling control;
Conference_Titel :
Power Engineering and Automation Conference (PEAM), 2011 IEEE
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-9691-4
DOI :
10.1109/PEAM.2011.6134822
