电网电压不对称时基于预测电流的双馈风电系统优化控制  

Predictive Current-Based Optimal Control of Wind Power System Composed of Doubly Fed Induction Generators Under Unbalanced Grid Voltage

作　　者：张建华 蔚芳 谢孟丽 刘其辉 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206

出　　处：《电网技术》2012年第12期228-235,共8页Power System Technology

基　　金：国家自然科学基金项目(50807012)~~

摘　　要：电网电压不对称下双馈感应发电机(doubly fedinduction generator DFIG)转子侧变流器(rotor side converter,RSC)和网侧变流器(grid-side converter,GSC)的有效控制对风电场并网运行有着重要意义。提出了基于预测电流的DFIG系统优化控制策略:针对DFIG,构建了电网电压不对称下预测电流控制模型;对GSC,在常规预测电流模型上进行改进;分析了RSC和GSC优化控制目标。在实时数字仿真(real time digital simulator,RTDS)平台上搭建了一台2MW DFIG风电系统完整仿真模型,验证了上述控制策略的正确性和有效性。Available operation control of rotor-side converter （RSC） and grid-side converter （GSC） of doubly fed induction generator （DFIG） under unbalanced grid voltage are significant to the operation of grid-connected wind farm. A predictive current-based optimal control strategy for wind power system composed of DFIGs is proposed. A predictive current control model for DFIG under unbalanced grid voltage is constructed; based on conventional predictive current model the GSC is improved; optimal control objectives of RSC and GSC are analyzed. A complete simulation model for a wind power system composed of a DFIG with rated capacity of 2MW is built on real time digital simulator （RTDS） platform, and the correctness and effectiveness of above-mentioned control strategy are verified.

关 键 词：电网电压不对称 双馈风电机 预测电流控制 双 脉宽调制变流器 优化控制 实时数字仿真 

分 类 号：TM614[电气工程—电力系统及自动化] TM76