互不兼容的多功能综合数字继电器的普遍应用,新技术带来的设备更新期大幅缩短以及对继电保护控制精度和实时性越来越高的要求,使得采用嵌入式实时操作系统的电力系统数字继电器通用软件平台的问世成为必然。通过分析电力系统继电保护功...互不兼容的多功能综合数字继电器的普遍应用,新技术带来的设备更新期大幅缩短以及对继电保护控制精度和实时性越来越高的要求,使得采用嵌入式实时操作系统的电力系统数字继电器通用软件平台的问世成为必然。通过分析电力系统继电保护功能需求与分类,在μC OS Ⅱ实时操作系统的基础上,确定了软件平台的任务划分以及任务调度方式。μC OS Ⅱ是源码开放的抢占式实时内核,代码资源丰富,运行时间稳定,可以满足继电保护对可靠性、实时性的要求。并且通过该平台,开发了配电线路保护单元。该软件平台具有良好的通用性、移植性和扩展性,是实现软装配技术的基础。展开更多
A new distribution principle of bus protection is presented.The protection system description,its design features,hardware structure,construction of data communication network are given.Dynamic simulation experiments ...A new distribution principle of bus protection is presented.The protection system description,its design features,hardware structure,construction of data communication network are given.Dynamic simulation experiments show its distinguishing advantages over traditional centralized principle.展开更多
This paper presented a scheme of relayed cellular mobile telecommunication network,which only employs fixed digital relays and not more than two-hop relay routes.Power saving potential of the network is deeply studied...This paper presented a scheme of relayed cellular mobile telecommunication network,which only employs fixed digital relays and not more than two-hop relay routes.Power saving potential of the network is deeply studied under the assumption of not occupying additional frequency bands(i.e.relays share the same frequency bands as used by the base stations).Theoretical analysis and simulation results have both shown that,with the same radio coverage requirement,the necessary effective transmission powers in such a relayed network have greatly decreased compared to conventional cellular network.展开更多
文摘互不兼容的多功能综合数字继电器的普遍应用,新技术带来的设备更新期大幅缩短以及对继电保护控制精度和实时性越来越高的要求,使得采用嵌入式实时操作系统的电力系统数字继电器通用软件平台的问世成为必然。通过分析电力系统继电保护功能需求与分类,在μC OS Ⅱ实时操作系统的基础上,确定了软件平台的任务划分以及任务调度方式。μC OS Ⅱ是源码开放的抢占式实时内核,代码资源丰富,运行时间稳定,可以满足继电保护对可靠性、实时性的要求。并且通过该平台,开发了配电线路保护单元。该软件平台具有良好的通用性、移植性和扩展性,是实现软装配技术的基础。
文摘A new distribution principle of bus protection is presented.The protection system description,its design features,hardware structure,construction of data communication network are given.Dynamic simulation experiments show its distinguishing advantages over traditional centralized principle.
基金National Science Fund for Creative ResearchGroups(No.60521002)Chinese NationalKey Technology R&D Program(No.2005BA908B02)Science Foundation ofShanghai Municipal Commission of Scienceand Technology,Chinese(No.05dz05802)
文摘This paper presented a scheme of relayed cellular mobile telecommunication network,which only employs fixed digital relays and not more than two-hop relay routes.Power saving potential of the network is deeply studied under the assumption of not occupying additional frequency bands(i.e.relays share the same frequency bands as used by the base stations).Theoretical analysis and simulation results have both shown that,with the same radio coverage requirement,the necessary effective transmission powers in such a relayed network have greatly decreased compared to conventional cellular network.
