中国广域范围内风能资源短时间尺度的时空互补特性调查研究

Investigation on short-term temporospatial complementarities of China's wind energy resources spreading over wide area

风能资源所具有的间歇性和波动性的特性致使风电输出功率具有很大程度的随机性和难以预测性。将这种大规模的波动电源接入电网会给电力系统安全稳定运行带来诸多不利影响。近些年来利用广域范围内风能资源时空互补特性平滑大规模风能输出功率波动已引起国内外学者的广泛关注。中国小时级别及以上时间尺度下的风能资源时空互补性已得到了初步的调查研究,但小时级别以下时间尺度下的时空互补性有待进一步研究。因此,基于中国气象局提供的气象风速数据,本文结合各种统计方法和指标调查研究了中国广域范围内风能资源短时间尺度(1min)的时空互补特性。

Wind power is highly variable and difficult to predict due to the intermittent and fluctuating nature of wind energy resources. Integrating such unstable power source into power systems will bring significant impacts on the safe and reliable operation of them. Interconnecting geographically dispersed wind generations is one of the fea-sible ways to smooth wind power output. Until now making use of the temporospatial complementarities of geograph-ically dispersed wind resources has attracted more and more eyes at home and abroad over recent years. For China, hourly smoothing effect of combining geographically dispersed wind energy resources has been well studied, but the short-term effect still needs to be investigated. Hence,based on the data provided by China Meteorological Adminis-tration (CMA), this paper analyzes the short-term (1minute) temporospatial complementarities of wind energy re-sources spreading over a wide area in China. Several results are drawn based on the analysis and a feasible diagram for China to make use of the complementarities of renewable resources is discussed in this paper.