中国三北地区风—光互补发电系统空间优化研究

Spatial Optimization of Wind-PV Hybrid Energy Systems for the Three-North Region in China

筛选适宜建设风-光互补系统的地区,探究这些地区互补系统最优配比,有助于提高风、光资源的利用率、实现能源结构的绿色低碳转型。为了识别三北地区风、光资源的分布情况及其互补性,首先利用基于四维同化数据的可再生能源评估模型,定量估算三北地区风、光发电年平均容量因子值空间分布情况。研究发现风、光资源发电潜力均较大的地区集中在河北北部和内蒙古,并得到三北地区风、光发电最优比例及相应的互补发电出力平稳性水平;从中筛选出风、光发电潜力大,发电平稳性较高的3个点位作为潜在的风-光互补基地,结合京津唐用电数据,得出三地风-光互补系统净负荷波动最小时的风、光配比。

The optimal combination of wind and solar PV systems to constitute wind-PV hybrid power systems can provide more stable power outputs than the individual component systems, facilitating the integration of variable renewable sources into the regional power system. In this study, the Three-North region was selected as the targeted area, and the renewable energy assessment model based on four-dimensional assimilation data was adopted to evaluate the spatial distribution of annual average capacity factor values of wind and solar power generation. The results indicated that provinces including Inner Mongolia and Hebei are endowed with a high potential for both wind and solar power generation. The optimal ratio of wind-PV power generation in this region was further quantified for the lowest overall variation. Based on these results, three potential sites with both abundant wind and solar power, and high stability(according to their optimal wind-PV ratios) were selected as potential renewable electricity sources for the JingJin-Tang power grid. The optimization analysis of the wind-PV hybrid energy system in each site was further carried out with additional consideration on hourly supply and demand balances.