图表显示,2015年至2025年,该省电力结构出现明显的清洁化转变。风电装机从900万千瓦增至3600万千瓦,为原来的四倍;光伏增幅最惊人,从260万千瓦跃至4800万千瓦,十年间接近二十倍;水电基数最大,2015年为2200万千瓦,2025年达到2350万千瓦,占比明显下降。到2025年,风光合计装机已超过水电,电源结构由以水电为主转向以风光为主。这一变化与风光资源开发和电网建设同步,也带来新课题:风光出力随天气起伏,装机上去之后,调节与储能必须跟上。预计随着储能投产与输电通道扩容,清洁发电的比重还会继续上升。
How it's marked
Scoring points for a descriptive and analytical essay: First, fully cover the two comparisons across all three types of data; do not report only the positive aspects. Second, identify the trends correctly (solar and wind power rise sharply, hydropower remains stable, and the structure changes hands). Third, analyze causes and make reasonable predictions based on the data; do not invent figures not shown in the chart. Fourth, write about 200 characters, with a clear structure. The model answer proceeds in this order: overview—comparison by category—structural implications—challenges—predictions.