电力系统保护与控制Issue(18)：17-24,8.
直驱永磁风力发电系统在不对称电网故障下的电压稳定控制
Voltage stability control for direct driven wind turbine with permanent magnet synchronous generator in grid asymmetric faults
摘要
Abstract
When the direct driven wind turbine with permanent magnet synchronous generator (D-PMSG) faces the grid asymmetric faults, the negative sequence component makes DC bus voltage produce 2 times frequency oscillation, thus this paper proposes to form a balanced three-phase voltage based on the single-phase voltage delay 60°theory to eliminate the effect of negative sequence component on DC bus voltage. For grid-side inverter, this paper uses voltage ring to steady DC voltage and control active power of converter in outer loop, and uses current feedforward control in inner loop to make the voltage vector decouple in dq axis and control output current of inverter based on the reference value of current obtained by outer loop control. Meanwhile, this paper uses energy discharge circuit to solve power congestion of DC side for D-PMSG in grid asymmetric faults. In addition, the improved minimum energy control strategy is used for dynamic voltage restorer DVR to provide the maximum reactive power support for the system and recover grid side voltage, so as to ensure the stable operation of the system. The simulation results show the effectiveness of the control strategy depending on real-time data in Hexi grid. This work is supported by National Natural Science Foundation of China (No. 50967001) and Excellent Youth Teacher Foundation of Lanzhou University of Technology (No. Q200814).关键词
D-PMSG/不对称故障/直流母线/控制策略/动态电压恢复器Key words
D-PMSG/asymmetrical fault/DC bus/control strategy/dynamic voltage restorer分类
信息技术与安全科学引用本文复制引用
张晓英,程治状,李琛,丁宁,蒋拯..直驱永磁风力发电系统在不对称电网故障下的电压稳定控制[J].电力系统保护与控制,2013,(18):17-24,8.基金项目
国家自然科学基金资助项目(50967001)；兰州理工大学优秀青年教师培养资助项目(Q200814) （50967001）
