Two calculation modes for the effect of external load on slope stability, i.e., mode I in which the external load is thought to act on slope surface, and mode II in which the external load is thought to act on slip su...Two calculation modes for the effect of external load on slope stability, i.e., mode I in which the external load is thought to act on slope surface, and mode II in which the external load is thought to act on slip surface along the force action line, were considered. Meanwhile, four basic distribution patterns of external load were used, of which complex external loads could be composed. In analysis process, several limit equilibrium methods, such as Swedish method, simplified Bishop method, simplified Janbu method, Spencer method, Morgenstern-Price(M-P) method, Sarma method, and unbalanced thrust method, were also adopted to contrast their differences in slope stability under the external load. According to parametric analysis, some conclusions can be obtained as follows:(1) The external load, with the large magnitude, small inclination angle, and acting position close to the slope toe,has more positive effect on slope stability;(2) The results calculated using modes I and II of external load are similar, indicating that the calculation mode of external load has little influence on slope stability;(3) If different patterns of external loads are equivalent to each other, their slope stability under these external loads are the same, and if not, the external load leads to the better slope stability,as action position of the resultant force for external load is closer to the lower sliding point of slip surface.展开更多
标准算例系统是开展电力系统工程、科研、教育工作的重要工具。在我国坚持“集中式和分布式开发并举”的新能源发展战略背景下,提出一种分布式新能源高占比电网安全稳定标准算例具有重要意义。为此,该文首先介绍适用于大电网安全分析的...标准算例系统是开展电力系统工程、科研、教育工作的重要工具。在我国坚持“集中式和分布式开发并举”的新能源发展战略背景下,提出一种分布式新能源高占比电网安全稳定标准算例具有重要意义。为此,该文首先介绍适用于大电网安全分析的分布式新能源仿真建模方法,从设备级模型和聚合等值模型两类颗粒度,总结构建多电压等级算例系统的参数等值方法。然后,面向大电网安全分析的宏观和局部场景,提出一种包含主网架和子网架两部分的算例系统。其中,主网架采用500 k V电压等级,可满足潮流计算、频率安全、电压安全等仿真需求,而子网架提供了颗粒度更小的拓扑数据,可以满足局部电网的电压安全深度分析。最后,以该系统为例,分别介绍所提标准算例系统在潮流计算、频率安全、电压安全等方面的应用。展开更多
基金Project(2015M580702)supported by the China Postdoctoral Science FoundationProject(51608541)supported by the National Natural Science Foundation of ChinaProject(2014122006)supported by the Guizhou Provincial Department of Transportation Foundation,China
文摘Two calculation modes for the effect of external load on slope stability, i.e., mode I in which the external load is thought to act on slope surface, and mode II in which the external load is thought to act on slip surface along the force action line, were considered. Meanwhile, four basic distribution patterns of external load were used, of which complex external loads could be composed. In analysis process, several limit equilibrium methods, such as Swedish method, simplified Bishop method, simplified Janbu method, Spencer method, Morgenstern-Price(M-P) method, Sarma method, and unbalanced thrust method, were also adopted to contrast their differences in slope stability under the external load. According to parametric analysis, some conclusions can be obtained as follows:(1) The external load, with the large magnitude, small inclination angle, and acting position close to the slope toe,has more positive effect on slope stability;(2) The results calculated using modes I and II of external load are similar, indicating that the calculation mode of external load has little influence on slope stability;(3) If different patterns of external loads are equivalent to each other, their slope stability under these external loads are the same, and if not, the external load leads to the better slope stability,as action position of the resultant force for external load is closer to the lower sliding point of slip surface.
文摘标准算例系统是开展电力系统工程、科研、教育工作的重要工具。在我国坚持“集中式和分布式开发并举”的新能源发展战略背景下,提出一种分布式新能源高占比电网安全稳定标准算例具有重要意义。为此,该文首先介绍适用于大电网安全分析的分布式新能源仿真建模方法,从设备级模型和聚合等值模型两类颗粒度,总结构建多电压等级算例系统的参数等值方法。然后,面向大电网安全分析的宏观和局部场景,提出一种包含主网架和子网架两部分的算例系统。其中,主网架采用500 k V电压等级,可满足潮流计算、频率安全、电压安全等仿真需求,而子网架提供了颗粒度更小的拓扑数据,可以满足局部电网的电压安全深度分析。最后,以该系统为例,分别介绍所提标准算例系统在潮流计算、频率安全、电压安全等方面的应用。
