黄河上游风电光伏互补性量化评估及容量配比研究

针对现有的相关性分析并不能清晰地描述风电和光电联合后变化特征这一问题,该文以黄河上游清洁能源基地为例对风电和光电之间的互补性展开研究,分析其在多个时间尺度上的特征和变化规律,采用一种基于波动特性描述的多能源互补性评估指标体系,评估风电和光电的互补性。结果表明,风电和光电在不同时间尺度上均存在一定程度的互补性,即两者叠加能够降低其自身的波动性。进一步探究不同风、光装机配比下互补性的变化规律,有助于全面理解风、光等不同能源之间的互补性,并为清洁能源基地的规划与设计提供一定的科学依据。

Infuences of Different Admixtures on the Drying Shrinkage Characteristics of Metakaolin-based Geopolymer Mortar

To investigate the influences of different admixtures on the drying shrinkage of polymer mortar in a metakaolin base,the experiments of VAE(vinyl acetate ethylene copolymer),APAM(anionic polyacrylamide)and CPAM(cationic polyacrylamide)on the drying shrinkage properties of geopolymer mortar were designed under normal temperature curing conditions.An SP-175 mortar shrinkage dilatometer was introduced to measure the dry shrinkage of geopolymer mortar.Meanwhile,the drying shrinkage properties of geopolymer mortar are exhibited by the parameters of water loss rate,drying shrinkage rate,drying shrinkage strain and drying shrinkage coefficient.The experimental data are further fitted to obtain the prediction model of dry shrinkage of geopolymer mortar,which can better reflect the relationship between dry shrinkage rate and time.Finally,the experimental results demonstrate that the dry shrinkage of geopolymer mortar can be significantly increased by adding 4%VAE admixture,meanwhile under the condition that the polymer film formed by VAE reaction can strengthen and toughen the mortar.2.5%APAM admixture and 1.5%CPAM admixture can enhance the dry shrinkage performance of geopolymer mortar in a certain range.