电力系统自动化2011，Vol.35Issue(11)：20-26,81,8.
电网谐波条件下双馈感应风力发电机的建模与控制
Modeling and Control of Wind Turbine Driven Doubly-fed Induction Generators Under Harmonic Grid Voltage Conditions
摘要
Abstract
Based on the detailed analysis on the control of rotor side convenor for the doubly-fed induction generator (DFIG) under harmonic grid voltage conditions, this paper presents a precise mathematical model of the DFIG in the stator-flux-oriented fundamental positive reference frame (dq) + , negative 5-order (dq)5- , and positive 7-order reference frames (dq)7+ . The reasons of the oscillations in the instantaneous active power, reactive power and electromagnetic torque of the DFIG are analyzed and explained through redefining the powers and torque under this special operation condition. Four alternative control targets and the computation algorithm of their corresponding rotor current references for the fundamental and harmonic components are proposed. A novel current controller, consisting of a traditional PI regulator and a resonant (R) controller tuned at the 6 times of grid frequency and referred into the positive (dq)+ reference frame, is designed. It can efficiently suppress the 5th and 7th order components of rotor current without the complex sequential-component decomposition and corresponding time delay involved. Simulation studies on a 2 MW commercial wind-turbine driven DFIG system proves that the suggested control scheme can efficiently smooth the instantaneous active and reactive power fluctuation and electromagnetic torque pulsation, which verifies the correctness of the proposed mathematical model of DFIG and the effectiveness of the suggested control strategy.关键词
双馈感应发电机/电网谐波/建模/电流控制器/定子磁链定向Key words
doubly-fed induction generator (DFIG)/ electrical power harmonics/ modeling/ current controller/ stator-flux orientation引用本文复制引用
徐海亮,胡家兵,贺益康..电网谐波条件下双馈感应风力发电机的建模与控制[J].电力系统自动化,2011,35(11):20-26,81,8.基金项目
国家自然科学基金资助项目(50907057) （50907057）
国家高技术研究发展计划(863计划)资助项目(2007AA05Z419). （863计划）
