Dynamic modeling and direct power control of wind turbine driven DFIG under unbalanced network voltage conditions  

作　　者：Jia-bing HU Yi-kang HE Lie XU 

机构地区：[1]School of Electrical Engineering, Zhejiang University, Hangzhou 310027, China [2]Department of Electronics and Electrical Engineering, University of Strathclyde, Glasgow G40PG, UK

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2008年第12期1731-1740,共10页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project (No. 50577056) supported by the National Natural Science Foundation of China

摘　　要：This paper proposes an analysis and a direct power control (DPC) design of a wind turbine driven doubly-fed induction generator (DFIG) under unbalanced network voltage conditions. A DFIG model described in the positive and negative synchronous reference frames is presented. Variations of the stator output active and reactive powers are fully deduced in the presence of negative sequence supply voltage and rotor flux. An enhanced DPC scheme is proposed to eliminate stator active power oscillation during network unbalance. The proposed control scheme removes rotor current regulators and the decomposition processing of positive and negative sequence rotor currents. Simulation results using PSCAD/EMTDC are presented on a 2-MW DFIG wind power generation system to validate the feasibility of the proposed control scheme under balanced and unbalanced network conditions.This paper proposes an analysis and a direct power control （DPC） design of a wind turbine driven doubly-fed induction generator （DFIG） under unbalanced network voltage conditions. A DFIG model described in the positive and negative synchronous reference frames is presented. Variations of the stator output active and reactive powers are fully deduced in the presence of negative sequence supply voltage and rotor flux. An enhanced DPC scheme is proposed to eliminate stator active power oscillation during network unbalance. The proposed control scheme removes rotor current regulators and the decomposition processing of positive and negative sequence rotor currents. Simulation results using PSCAD/EMTDC are presented on a 2-MW DFIG wind power generation system to validate the feasibility of the proposed control scheme under balanced and unbalanced network conditions.

关 键 词：Doubly-fed induction generator （DFIG） Wind turbine Direct power control （DPC） Stator voltage oriented （SVO） Unbalanced network 

分 类 号：TM315[电气工程—电机] TM614