为了准确评估告警信号产生时智能变电站保护系统的可靠运行情况,研究了一种基于进程仿真工具PAT的智能变电站保护信息交互建模与验证方法。分析了多个厂家保护装置的原理,构造了保护系统的告警故障树,给出了各保护子功能的工作条件与告...为了准确评估告警信号产生时智能变电站保护系统的可靠运行情况,研究了一种基于进程仿真工具PAT的智能变电站保护信息交互建模与验证方法。分析了多个厂家保护装置的原理,构造了保护系统的告警故障树,给出了各保护子功能的工作条件与告警信号的对应关系。采用进程仿真工具PAT的实时系统模块RTS(Real-Time System Module),对各IED的内部工作、各IED之间的交互过程等进行建模,包括工作条件、各进程之间的信息传递与时序等,给出了保护子功能死锁与保护系统运行阶段的断言与验证。多个算例验证了基于PAT包含告警信号的智能变电站保护系统交互建模与验证方法的有效性,提高了保护模型的准确性和实用性。展开更多
This paper proposes innovations to address challenges emanating from road traffic congestion. Improving economies create more car owners resulting in increased automobile manufacturing, increased vehicle population gi...This paper proposes innovations to address challenges emanating from road traffic congestion. Improving economies create more car owners resulting in increased automobile manufacturing, increased vehicle population giving rise to higher emission of CO2 resulting in traffic congestion. Congested traffic has idling vehicles which emit higher CO2 and pollution. Besides, traffic congestion increases turnaround time, delivery time, commuting time and related logistical aspects. Commuting time negatively impacts working hours. Unless the traffic congestion is mitigated, the economy will take a beating creating a vicious ecology cycle. Building new roads, bridges or reconditioning of infrastructure is not always the best possible solutions. Efficient traffic management is a key to country’s economic growth. Various analytical models are employed to study, appreciate traffic congestion. The paper studies these models to infer that real time approach is the only solution. Several approaches are being worked on and few commercial systems too are available. These systems provide traffic information for course correction. However, it has latency and hence deviates from real time environment. Traffic congestion being highly dynamic in nature, it necessitates real time solution with real time inputs. It is proposed to integrate Real time traffic data with the traffic signal thus modulating the cycle timings at every junction. Deviation from static asymmetric cycle timing is implemented by assigning green phases based on density of vehicles. With minimalistic infrastructure and negligible incremental cost, the paper not only proposes to address traffic congestion but also paves the way for capturing traffic offenses, vehicle tracking and toll collection. The research is imminently realizable and makes a strong case for a PPP (Public Private Partnership) project.展开更多
文摘为了准确评估告警信号产生时智能变电站保护系统的可靠运行情况,研究了一种基于进程仿真工具PAT的智能变电站保护信息交互建模与验证方法。分析了多个厂家保护装置的原理,构造了保护系统的告警故障树,给出了各保护子功能的工作条件与告警信号的对应关系。采用进程仿真工具PAT的实时系统模块RTS(Real-Time System Module),对各IED的内部工作、各IED之间的交互过程等进行建模,包括工作条件、各进程之间的信息传递与时序等,给出了保护子功能死锁与保护系统运行阶段的断言与验证。多个算例验证了基于PAT包含告警信号的智能变电站保护系统交互建模与验证方法的有效性,提高了保护模型的准确性和实用性。
文摘This paper proposes innovations to address challenges emanating from road traffic congestion. Improving economies create more car owners resulting in increased automobile manufacturing, increased vehicle population giving rise to higher emission of CO2 resulting in traffic congestion. Congested traffic has idling vehicles which emit higher CO2 and pollution. Besides, traffic congestion increases turnaround time, delivery time, commuting time and related logistical aspects. Commuting time negatively impacts working hours. Unless the traffic congestion is mitigated, the economy will take a beating creating a vicious ecology cycle. Building new roads, bridges or reconditioning of infrastructure is not always the best possible solutions. Efficient traffic management is a key to country’s economic growth. Various analytical models are employed to study, appreciate traffic congestion. The paper studies these models to infer that real time approach is the only solution. Several approaches are being worked on and few commercial systems too are available. These systems provide traffic information for course correction. However, it has latency and hence deviates from real time environment. Traffic congestion being highly dynamic in nature, it necessitates real time solution with real time inputs. It is proposed to integrate Real time traffic data with the traffic signal thus modulating the cycle timings at every junction. Deviation from static asymmetric cycle timing is implemented by assigning green phases based on density of vehicles. With minimalistic infrastructure and negligible incremental cost, the paper not only proposes to address traffic congestion but also paves the way for capturing traffic offenses, vehicle tracking and toll collection. The research is imminently realizable and makes a strong case for a PPP (Public Private Partnership) project.
