摘要
前期制作了一台智能变桨垂直轴风力发电机样机,经自然条件下的发电实验发现,该样机只能在小于1.0的低尖速比范围内运行,无法成功自起进入高尖速比运行区。对此,经过深入的理论分析发现智能变桨垂直轴风力发电机的两个问题:一是风力机仅凭某一尖速比下的最优变桨规律无法自起;二是最优变桨规律中存在不连续现象,具有不可实现性。通过建立整体的变桨规律曲面,人工修正变桨规律中的不连续部分,对最优变桨规律进行改进设计。最后采用双多流管理论对所设计的变桨规律进行力矩特性分析和发电预测,分析显示采用该变桨规律的垂直轴风力机能够可靠自起且高效发电。
A prototype of smart variable-pitch vertical axis wind turbine was built before and this prototype could only operate in the range of tip speed ratios less than 1. 0, having no self-starting capability to enter into the range of higher tip speed ratios. Two problems of the prototype were found through the theoretical analysis, firstly, the wind turbine has no self-starting capability for using just one optimal pitching law at certain tip speed ratio; secondly, the optimal pitching laws are discontinuous in some places. Inorder to solve these problems, the camber with holistic optimal pitching laws was built, the discontinuous parts were modified to improve the pitching laws. The moment characteristics of the improved pitching laws were analyzed based on double multiple streamtube model. The results indicate that wind turbine using these laws can self-start reliably and generate electricity efficiently.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2013年第8期1427-1433,共7页
Acta Energiae Solaris Sinica
基金
黑龙江省科技计划(TA09Q801)
黑龙江省自然科学基金(E201216)
中央高校基本科研业务费(HEUCFZ1118)
关键词
垂直轴风力发电机
变桨
变桨规律
双多流管模型
vertical axis wind turbine
variable pitch
pitching laws
double-disks multiple streamtube model
