摘要
根据交流励磁变速恒频风力发电运行的特点,将矢量控制的电网电压定向技术应用在双馈发电机的并网发电上,提出了基于电网电压定向的双馈变速恒频风力发电柔性并网控制策略,即在定子开路或接本地负载的情况下,根据电网电压以及电机转速调节转子的励磁电流,在变速条件下实现几乎无冲击电流并网及输出有功功率和无功功率的解耦控制,并建立了交流励磁发电机柔性并网及稳态运行的控制模型.对柔性并网及其逆过程解列进行了实验研究,结果验证了控制策略的正确性和有效性.
According to characteristic of AC （alternating current）-excited variable speed constant frequency （VSCF） wind power generation, vector control technique is applied in doubly fed induction generator （DFIG）. Flexible cutting-in control strategy is presented based on grid voltage orientation. When stator circuit is open or connected with load, according to grid voltage and rotor speed, rotor excitating current is adjusted to connect grid without overshoot current, decoupling control of active power and reactive power is obtained. The modes of flexible cutting in and running in ready state are established. Flexible cutting in and its inverse process cutting off are studied by experiments. The re- sult confirms the accuracy and validity of flexible cutting in and off control strategy.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第3期94-97,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
高等学校博士学科点专项科研基金资助项目(20060280018)
关键词
风力发电
变速恒频
电网电压定向
柔性并网
解列
解耦
wind power generation
VSCF （variable speed constant frequency）
grid voltage orienta- tion
flexible cutting-in
cutting-off
decoupling
