将实时数字仿真仪(real time digital simulator,RTDS)与继电保护装置相连进行闭环测试,可定量分析和检查保护装置在各种工况下的识别能力及保护的动态动作特性,解决了传统动态模拟试验在某些特定工况下不能定量分析保护动作特性的问题...将实时数字仿真仪(real time digital simulator,RTDS)与继电保护装置相连进行闭环测试,可定量分析和检查保护装置在各种工况下的识别能力及保护的动态动作特性,解决了传统动态模拟试验在某些特定工况下不能定量分析保护动作特性的问题。构建了基于RTDS的线路保护、变压器保护柔性检测平台,介绍了该平台的总体结构和试验场景基本架构的设计,并通过数字动态模拟试验验证了该平台能满足检测要求,既可实现常规试验项目,又可完成针对线路保护的系统振荡、功率倒向、弱馈,以及针对变压器保护的励磁涌流、有载调压等特殊试验,可对不同厂家、不同型号的保护装置进行检测。展开更多
Solute transmission in saturated ore heap was studied numerically and experimentally. The convection-diffusion equation (CDE) used to describe the mass transportation in porous media was solved by characteristic diffe...Solute transmission in saturated ore heap was studied numerically and experimentally. The convection-diffusion equation (CDE) used to describe the mass transportation in porous media was solved by characteristic difference method to give the distribution of the concentration of ferrous ion in the ore column. To calibrate the computational model, a column test was performed using infiltration of sulfide ferrous solution (the initial concentration is c0=0.04 mol/L) on a 100 cm high column composed of ore particles smaller than 10 mm for 2.5 h. The numerical analysis shows that the results obtained from numerical modeling under the same operating conditions as used for column test are in good agreement with those from experimental procedure on the whole trend, which indicates that the model, the numerical method, and the parameters chosen can reflect the rule of ferrous ion transmission in ore heap.展开更多
文摘将实时数字仿真仪(real time digital simulator,RTDS)与继电保护装置相连进行闭环测试,可定量分析和检查保护装置在各种工况下的识别能力及保护的动态动作特性,解决了传统动态模拟试验在某些特定工况下不能定量分析保护动作特性的问题。构建了基于RTDS的线路保护、变压器保护柔性检测平台,介绍了该平台的总体结构和试验场景基本架构的设计,并通过数字动态模拟试验验证了该平台能满足检测要求,既可实现常规试验项目,又可完成针对线路保护的系统振荡、功率倒向、弱馈,以及针对变压器保护的励磁涌流、有载调压等特殊试验,可对不同厂家、不同型号的保护装置进行检测。
基金Project(06JJ30024) supported by the Natural Science Foundation of Hunan Province, ChinaProject(2004CB619206) supported by the Major State Basic Research and Development Program of China+1 种基金Project(50321402) supported by the National Science Fund for Innovative Research Groups of ChinaProject(06B052) supported by the Scientific Research Fund of Hunan Provincial Education Department of China
文摘Solute transmission in saturated ore heap was studied numerically and experimentally. The convection-diffusion equation (CDE) used to describe the mass transportation in porous media was solved by characteristic difference method to give the distribution of the concentration of ferrous ion in the ore column. To calibrate the computational model, a column test was performed using infiltration of sulfide ferrous solution (the initial concentration is c0=0.04 mol/L) on a 100 cm high column composed of ore particles smaller than 10 mm for 2.5 h. The numerical analysis shows that the results obtained from numerical modeling under the same operating conditions as used for column test are in good agreement with those from experimental procedure on the whole trend, which indicates that the model, the numerical method, and the parameters chosen can reflect the rule of ferrous ion transmission in ore heap.
