随着科技的发展,变电站综合自动化技术日益提升,新一轮的变电站综合自动化改造已经到来。传统综合自动化系统改造面临着施工周期长、停电时间久、投资大、事故风险高、覆盖面广等缺点,为此提出了一种定制式改造策略,将现场可利用资源进...随着科技的发展,变电站综合自动化技术日益提升,新一轮的变电站综合自动化改造已经到来。传统综合自动化系统改造面临着施工周期长、停电时间久、投资大、事故风险高、覆盖面广等缺点,为此提出了一种定制式改造策略,将现场可利用资源进行充分的利旧,只对新装置进行模块化定制,保证新设备和旧资源的兼容性。通过在220 k V凤凰变电站综合自动化系统改造工程中的应用,验证了定制式改造策略的优越性,不仅节省了施工成本,在保障安全生产的同时将停电时间和施工周期压缩到了新的临界点,甚至部分工程实现了不停电、零风险作业,具有广泛的推广意义。展开更多
A feedback control system is needed to restrain plasma vertical displacement in EAST (Experimental Advanced Superconducting Toknmak). A fast control power supply excites active feedback coils, which produces a magne...A feedback control system is needed to restrain plasma vertical displacement in EAST (Experimental Advanced Superconducting Toknmak). A fast control power supply excites active feedback coils, which produces a magnetic field to control the plasma's displacement. With the development of EAST, new demands on the new fast control power supply have led to an enhanced ability of fast response and output current, as well as a new control mode. The structure of cascaded and paralleled H-bridges can meet the demand of extended capacity, and digital control can reMize current and voltage mixed control mode. The validity of the proposed scheme is confirmed by experiments.展开更多
文摘随着科技的发展,变电站综合自动化技术日益提升,新一轮的变电站综合自动化改造已经到来。传统综合自动化系统改造面临着施工周期长、停电时间久、投资大、事故风险高、覆盖面广等缺点,为此提出了一种定制式改造策略,将现场可利用资源进行充分的利旧,只对新装置进行模块化定制,保证新设备和旧资源的兼容性。通过在220 k V凤凰变电站综合自动化系统改造工程中的应用,验证了定制式改造策略的优越性,不仅节省了施工成本,在保障安全生产的同时将停电时间和施工周期压缩到了新的临界点,甚至部分工程实现了不停电、零风险作业,具有广泛的推广意义。
基金supported by ITER Program of China(973 Program)(No.2011GB109002)National Natural Science Foundation of China(No.11275056)Hefei University of Technology Doctor Research Foundation of China(No.2011HGBZ1292)
文摘A feedback control system is needed to restrain plasma vertical displacement in EAST (Experimental Advanced Superconducting Toknmak). A fast control power supply excites active feedback coils, which produces a magnetic field to control the plasma's displacement. With the development of EAST, new demands on the new fast control power supply have led to an enhanced ability of fast response and output current, as well as a new control mode. The structure of cascaded and paralleled H-bridges can meet the demand of extended capacity, and digital control can reMize current and voltage mixed control mode. The validity of the proposed scheme is confirmed by experiments.