摘要
在考虑定子电压动态性能的情况下,对变速恒频双馈型风力发电机空载并网及电网故障下运行控制策略进行了深入分析,并仔细推导了各控制器的设计依据。利用电网电压定向的矢量控制及分段改变转子电流的参考值的方法实现该并网控制,其主要目的是降低并网时定子的冲击电流。在稳态运行时,考虑了定子电流动态性能的要求,进一步提高了向电网输入电能的质量和低电压穿越能力。最后对整个并网过程进行了实验研究,结果证明了该控制策略的正确性与有效性。
In condition of considering the dynamic performance of stator voltage,the no-load connected-grid and grid fault control strategy of the VSCF doubly-fed wind generator are analyzed,and the design proofs of the controllers are carefully derived from the mathematical model.The grid voltage-oriented vector control and timely the change of the reference value of rotor current are employed to complete the control strategy.The main purpose of control strategy is to reduce the impact of the stator current.During the steady-state,taking the dynamic properties of stator current into account.The quality of the power into the grid is improved and the low-voltage through capacity is increased.While the simulation and test results have verified the correctness and effectiveness of the control strategy.
出处
《电力电子技术》
CSCD
北大核心
2010年第5期6-7,22,共3页
Power Electronics
基金
国家863高技术基金项目(2008AA05Z410)~~
关键词
风力发电机
变流器
电网故障
并网控制
wind power generator
converter
grid fault
connected-grid control
