暂态仿真和稳定性仿真在传统电力系统分析时几乎很少同时用于解决同一问题,而在微网以及含分布式电源的配电网中二者的应用出现了交集,如何合理地选择这两种仿真方法成为了亟待解决的问题。为此,详细阐述了暂态仿真和稳定性仿真的一致...暂态仿真和稳定性仿真在传统电力系统分析时几乎很少同时用于解决同一问题,而在微网以及含分布式电源的配电网中二者的应用出现了交集,如何合理地选择这两种仿真方法成为了亟待解决的问题。为此,详细阐述了暂态仿真和稳定性仿真的一致性和差异性,对微网中各种分布式电源和储能系统进行建模,采用Matlab/Sim Power Systems作为暂态仿真工具,DIg SILENT作为稳定性仿真工具,在统一的微网算例上进行了大量的仿真测试。通过对仿真结果的比较分析,说明了二者的一致性和差异性,同时也给出了其各自的适用范围,对于理解微网内部的各种动态过程和选择合理的仿真方法具有一定的指导意义。展开更多
Aiming at the issue of yaw and rollover stability control for off-road vehicles with non-pneumatic mechanical elastic wheel(MEW),an integrated control system based on fuzzy differential braking is developed.By simplif...Aiming at the issue of yaw and rollover stability control for off-road vehicles with non-pneumatic mechanical elastic wheel(MEW),an integrated control system based on fuzzy differential braking is developed.By simplifying the structure of the MEW,a corresponding fitting brush tire model is constructed and its longitudinal and lateral tire force expressions are set up,respectively.Then,a nonlinear vehicle simulation model with MEW is established to validate the proposed control scheme based on Carsim.The designed yaw and rollover control system is a two-level structure with the upper additional moment controller,which utilizes a predictive load transfer ratio(PLTR)as the rollover index.In order to design the upper integrated control algorithm,fuzzy proportional-integral-derivative(PID)is adopted to coordinate the yaw and rollover control,simultaneously.And the lower control allocator realizes the additional moment to the vehicle by differential braking.Finally,a Carsim-simulink co-simulation model is constructed,and simulation results show that the integrated control system could improve the vehicle yaw and roll stability,and prevent rollover happening.展开更多
文摘暂态仿真和稳定性仿真在传统电力系统分析时几乎很少同时用于解决同一问题,而在微网以及含分布式电源的配电网中二者的应用出现了交集,如何合理地选择这两种仿真方法成为了亟待解决的问题。为此,详细阐述了暂态仿真和稳定性仿真的一致性和差异性,对微网中各种分布式电源和储能系统进行建模,采用Matlab/Sim Power Systems作为暂态仿真工具,DIg SILENT作为稳定性仿真工具,在统一的微网算例上进行了大量的仿真测试。通过对仿真结果的比较分析,说明了二者的一致性和差异性,同时也给出了其各自的适用范围,对于理解微网内部的各种动态过程和选择合理的仿真方法具有一定的指导意义。
基金Project(11672127)supported by the National Natural Science Foundation of ChinaProject(NHAl3002)supported by the Major Exploration Project of the General Armaments Department of China+1 种基金Project(KYCX17_0240)supported by the Postgraduate Research&Practice Innovation Program of Jiangsu Province,ChinaProjects(NP2016412,NP2018403,NT2018002)supported by the Fundamental Research Funds for the Central Universities,China
文摘Aiming at the issue of yaw and rollover stability control for off-road vehicles with non-pneumatic mechanical elastic wheel(MEW),an integrated control system based on fuzzy differential braking is developed.By simplifying the structure of the MEW,a corresponding fitting brush tire model is constructed and its longitudinal and lateral tire force expressions are set up,respectively.Then,a nonlinear vehicle simulation model with MEW is established to validate the proposed control scheme based on Carsim.The designed yaw and rollover control system is a two-level structure with the upper additional moment controller,which utilizes a predictive load transfer ratio(PLTR)as the rollover index.In order to design the upper integrated control algorithm,fuzzy proportional-integral-derivative(PID)is adopted to coordinate the yaw and rollover control,simultaneously.And the lower control allocator realizes the additional moment to the vehicle by differential braking.Finally,a Carsim-simulink co-simulation model is constructed,and simulation results show that the integrated control system could improve the vehicle yaw and roll stability,and prevent rollover happening.
