| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To interconnect wind-power generation and photovoltaic power generation in large quantities inexpensively. <P>SOLUTION: A pitch angle control unit 16 of a wind-power generation apparatus 1 performs control to change a pitch angle of a blade 11 in accordance to a peripheral velocity ratio according to characteristic data shown in the figure. When generated power increases and there is not enough power margin to reduce the output systematically in a power system, the pitch angle is controlled to one offset from the optimal pitch angle to suppress an increase in generated power, thereby making a gradient of increase in generated power smaller and suppressing a rate of rise in generated power. When generated power is stable and there is not enough power margin to increase the output systematically in the power system, the pitch angle is shifted before the optimal pitch angle in preparation of a drop of generated power, thereby making small a difference between the power when generated power is stable and the power after the drop of generated power and suppressing a rate of drop in generated power. When a drop of generated power is predicted and there is not enough power margin to increase the output, the pitch angle may be offset from the optimal pitch angle. Conversely, when the drop in generated power is not predicted or there is enough power margin to increase the output, the wind-power generation apparatus is operated at the optimal operating point. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
