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double-circuit tower
相关语句
  塔双回
     STUDY OF UNBALANCE FACTOR AND INDUCED CURRENT FOR YIMIN-FENGTUN 500 kV DOUBLE-CIRCUIT TOWER LINE
     伊敏─冯屯500kV同塔双回线路不平衡度、感应电流及潜供电流研究
短句来源
     The traditional 500 kV double-circuit tower with three-tiers crossarm is higher that singal-circuit tower by 20m;
     传统三层横担的500 kV 同塔双回线路比单回线路增高约20m , 截雷次数多1-7~2-1 倍, 雷击跳闸率增加2~3 倍。
短句来源
     The Instances Study of Electrical Erosion of ADSS Optical Cable Suspended on High-voltage Double-circuit Tower
     同塔双回高压输电线路上ADSS光缆电蚀实例研究
短句来源
     Hence, for Three Gorgers district with higher soil resistivity and reltively serious lightning disturbances, a kind of shrunk type double-circuit tower with better performance should be studied and designed.
     为此, 对于土壤电阻率较高而雷害相对较严重的三峡地区应研究设计一种性能较优的紧缩型同塔双回线路。
短句来源
  相似匹配句对
     MODE TRANSFORMATION OF DOUBLE CIRCUIT LINE TOWER
     同杆并架双回线路模变换分析
短句来源
     Relay protection for double-circuit lines on the same tower
     同杆双回线路继电保护方案研究
短句来源
     RESEARCH ON FAULT ANALYSIS OF DOUBLE CIRCUIT LINES ON THE SAME TOWER
     同杆双回线故障分析新方法研究
短句来源
     MODE ANALYSIS OF DIFFERENT TRANSPORTED DOUBLE CIRCUIT ON SAME TOWER
     同杆双回路不同换位下模量分析
短句来源
     500 kV Identical Double Circuit Compact Type Tower
     500kV同塔双回紧凑型塔
短句来源
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According to the research on the defect of zero sequence current and negative sequence current faulty phase selection, and the analysis of the different phase relation of zero sequence voltage and negative sequence voltage when the system has two phase fault or single phase fault, a new faulty phase selecting scheme making up of the zero sequence voltage, negative sequence voltage and positive sequence voltage is put forward in this paper. The principle is simple and can select faulty phase...

According to the research on the defect of zero sequence current and negative sequence current faulty phase selection, and the analysis of the different phase relation of zero sequence voltage and negative sequence voltage when the system has two phase fault or single phase fault, a new faulty phase selecting scheme making up of the zero sequence voltage, negative sequence voltage and positive sequence voltage is put forward in this paper. The principle is simple and can select faulty phase correctly and unfailingly, not only for the normal fault, but also for the transferring fault, and the cross over fault on double circuit tower. It meets the demand of ultra high voltage line protection.

通过对零序、负序电流构成的序分量选相元件所存在问题的探讨,以及对单相接地和两相接地故障时,零序电压和正序电压不同相位关系的分析,得出了一种由零序、负序、正序电压所构成的新型故障序分量选相元件。该元件原理简单,选相可靠,不仅能对一般性故障正确选相,而且在转换性故障,同杆并架上的跨线故障等特殊故障情况下也能正确选相,满足了高压及超高压线路保护中对选相元件的要求。

The outgoing 500 kV lines set-completing for Three Gorgers Power Plant will adopt the pattern of double-circuit towers. The traditional 500 kV double-circuit tower with three-tiers crossarm is higher that singal-circuit tower by 20m; its lighening incepting time is 1 7~2 1-fold more, and trip rate of lightning strokes increases 2~3-fold, simultaneous trip rate of double-circuit occupies 30%-40% of the total trip rate, even reachs 50%~60% in the mountain area of high soil resistivity....

The outgoing 500 kV lines set-completing for Three Gorgers Power Plant will adopt the pattern of double-circuit towers. The traditional 500 kV double-circuit tower with three-tiers crossarm is higher that singal-circuit tower by 20m; its lighening incepting time is 1 7~2 1-fold more, and trip rate of lightning strokes increases 2~3-fold, simultaneous trip rate of double-circuit occupies 30%-40% of the total trip rate, even reachs 50%~60% in the mountain area of high soil resistivity. Hence, for Three Gorgers district with higher soil resistivity and reltively serious lightning disturbances, a kind of shrunk type double-circuit tower with better performance should be studied and designed. \ \ The calculating analysis and engineering practice both verify that, the horizontal distance between lines reduced to 6m or so is feasible in the engineering. By the comprehensive comparison, the high-performance shrunk type lines possess double superiorities of technology and economy.

三峡电厂配套的500 kV 出线将采用双回同塔方式。传统三层横担的500 kV 同塔双回线路比单回线路增高约20m , 截雷次数多1-7~2-1 倍, 雷击跳闸率增加2~3 倍。双回同时跳闸率约占总跳闸率的30 % ~40 % , 在高土壤电阻率的山区甚至达到50% ~60 % 。为此, 对于土壤电阻率较高而雷害相对较严重的三峡地区应研究设计一种性能较优的紧缩型同塔双回线路。从计算分析及工程实例均可证实, 水平线间距离减少为6 m 左右在工程中是可行的。经综合比较, 高性能紧缩型线路具有技术与经济双重优势。

The paper illustrates the structures and features of 500 kV double circuit towers of compact type of SCZ and SCJ series.It is known through the comparison that 500 kV compact type suspension towers of SCZ series are 29% lower in height,27% lighter in weight and one half in land occupation than those of the conventional drum type towers;while 500 kV compact type suspension towers of SCJ series are 21% lower in height,23% lighter in weight and 30% less in the land occupation than those...

The paper illustrates the structures and features of 500 kV double circuit towers of compact type of SCZ and SCJ series.It is known through the comparison that 500 kV compact type suspension towers of SCZ series are 29% lower in height,27% lighter in weight and one half in land occupation than those of the conventional drum type towers;while 500 kV compact type suspension towers of SCJ series are 21% lower in height,23% lighter in weight and 30% less in the land occupation than those of the conventional drum type towers.In general speaking,their investment is reduced with reduction of steel consumption and increase of the lightning resistance level.Also a new assumption for the future work has been put forward based on the test of real model towers with comparison and analysis.

文章叙述了SCZ和SCJ系列 5 0 0kV同塔双回并架紧凑型塔的结构、特点。通过比较可知 :SCZ系列 5 0 0kV紧凑型直线塔比常规鼓型塔塔高降低了 2 9%,塔重减轻了 2 7%,塔占地面积减少了一半 ;SCJ系列 5 0 0kV紧凑型转角塔比常规鼓型转角塔塔高降低了 2 1%,塔重减轻了 2 3%,铁塔占地面积也减少了 30 %;总之 ,减少了投资 ,降低了钢耗 ,提高了耐雷水平。并在真型试验、对比分析的基础上提出了今后新的工作设想。

 
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