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double-circuit lines     
相关语句
  双回线
     A method of fault pattern recognition on same-tower double-circuit lines using Kohonen neural network
     基于Kohonen网络的同杆双回线故障模式识别方法
短句来源
     Distance protection of double-circuit lines on the same pole
     同杆并架双回线保护中的距离保护
短句来源
     Study of Protective Relay on Series Capacitor Compensated Lines & Study of Protective Relay and Reclosure on Double-circuit Lines on the Same Pole
     串补线路继电保护的研究与同杆双回线继电保护及重合闸的研究
短句来源
     RTDS Real-time Simulation Test for Relay Protection and Self-adapting Automatic Recloser of 500 kV Sichuan Hong-Long Double-circuit Lines on Same Tower
     四川洪龙500kV同塔双回线继电保护及自适应重合闸装置RTDS实时仿真试验
短句来源
     The 330 kV An-Nan double-circuit lines with same poles is the main transmission line ofAnkang water power station which has a total installed capacity of 800 MW.
     330kV安(康)南(郊)同杆架设双回线是装机容量为800MW的安康水电站的主要外送线路。
短句来源
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  双回线路
     Dynamic Physical Model of 500 kV Common-tower Double-circuit Lines
     500kV同杆并架双回线路的动态物理模型
短句来源
     A New Wavelet Based Scheme for High Impedance Faults Detection in Double-circuit Lines
     基于小波变换的双回线路高阻接地保护新方法
短句来源
     Compared mode α travelling wave of double-circuit line on the same pole with that of fault line when single phase earth fault, some conclusions are reached as follows: the circumfluence component travelling waves are free from the systems outside the double-circuit lines, and have strong reflection in two-terminal busbar and weak reflection at fault point.
     通过对比单相接地故障时双回线环流网与双回线故障线的α模行波的仿真波形,得出了双回线环流量行波与双回线路以外系统无关,且在两端母线处的反射最强而在故障点的反射较弱等特点。
短句来源
     The relay protection solutions of cross line fault over double-circuit lines on the same tower are discussed, the protection signal transmission modes and technique characteristics of longitudinal differential protection are introduced.
     探讨同杆双回线路跨线故障的保护解决方案,介绍纵联保护信号传输方式和特点。
短句来源
     Using unbalanced insulation mode to improve power supply reliability of common-tower double-circuit lines
     采用不平衡绝缘方式提高同塔双回线路供电可靠性
短句来源
更多       
  同杆双回线
     A method of fault pattern recognition on same-tower double-circuit lines using Kohonen neural network
     基于Kohonen网络的同杆双回线故障模式识别方法
短句来源
     Study of Protective Relay on Series Capacitor Compensated Lines & Study of Protective Relay and Reclosure on Double-circuit Lines on the Same Pole
     串补线路继电保护的研究与同杆双回线继电保护及重合闸的研究
短句来源
     Two-terminal fault locating algorithm for double-circuit lines on the same tower based on distributed parameter model using asymmetrical parameter
     基于不对称分布参数的同杆双回线双端故障测距算法
短句来源
     Travelling wave characteristics of circumfluence component of double-circuit lines on the same pole
     同杆双回线环流量的行波特点
短句来源
     According to characteristics of double-circuit lines on the same tower, based on distributed parameter model using asymmetrical parameter, this paper proposes a new fault-locating algorithm for double-circuit lines on the same tower using asynchronous data of two terminals.
     针对同杆双回线的特点,基于不对称的分布参数模型,提出利用线路两端电气量的同杆双回线故障测距算法。
短句来源
更多       
  平行双回线
     NEW FAULT PHASE SELECTOR FOR DOUBLE-CIRCUIT LINES PROTECTIVE RELAYING BASED ON DIFFERENTIAL FAULT CURRENT COMPONENTS
     一种反应环流电流的平行双回线保护选相元件
短句来源
     As it is easy to obtain the fault components of the differential current and its error is small, the protection theory for double-circuit lines will be better than the conventional current balance protection using phase currents or current components.
     与电流平衡保护相比,该基于环流电流的保护在理论上能够提高平行双回线保护的性能。
短句来源

 

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    Alongside the growth of power supply in 220kV network in Anhui province (jn China) .intermediate substations were set up on several long transmission lines, thus breaking the whole line into shorter ones. Correspondingly, the number of double circuit lines increased.with regard to power line carrier communication, the number of broad band width line traps and coupling filters installed at terminals and intermediate bridging circuits should also increase. As a result, the quality of carrier channel declined....

    Alongside the growth of power supply in 220kV network in Anhui province (jn China) .intermediate substations were set up on several long transmission lines, thus breaking the whole line into shorter ones. Correspondingly, the number of double circuit lines increased.with regard to power line carrier communication, the number of broad band width line traps and coupling filters installed at terminals and intermediate bridging circuits should also increase. As a result, the quality of carrier channel declined. In bad weather condition, the PLC communication may be interrupted.This paper makes a survey of the causes of the increase of Overall attenuation of PLC channel due to the change of line configuration, For this purpose, the following factors are analyzed in delail:(1) the mismatch between input and load impedances dut to the shortening of direct transmission distance, (2) terminal states (in overhaul or cold stand by vs.in operation); (3) the operation mode of double-circuit lines; (4)the effect of broad baudwidth line traps and coupling filter.

    随着220千伏电网供电密度的扩大,在一些长距离的输电线路上多处开断,新建了一些中间变电所,线路距离变短。平行(或同杆)架设的输电线路也相应增多。在网络结线复杂的220千伏线路上组建载波通道,终端和中间桥路所采用的宽频结合加工设备(指阻波器和结合滤波器)数量随之增多。由电网结线变化所产生的电气短线、线路终端状态、平行线路运行方式的变化和宽频结合加工设备附加衰耗对载波通道总衰耗的影响,致使部分电路的实际通道衰耗远远超过了计算值。造成电路质量和运行可靠性下降。在恶劣的气候条件下,甚至会中断通信电路。针对这种情况,我们结合近年来的220千伏线路载波通道的运行实践,对电网结线变化所造成的载波通道总衰耗普遍增大的几个因素进行了分析。

    On a same-tower double-circuit power transmission line,a conventional phase-to-phase or ground distance relay cannot prevent a three phase tripping caused by cross-country faults between dissimilar phases of different circuits.This paper introduces a newly developed μC-based digital distance relay,not only able to be employed in a single-circuit line but also suitable for a same-tower double circuit line.As it can correctly select a fault phase in case of complex cross-country faults.The...

    On a same-tower double-circuit power transmission line,a conventional phase-to-phase or ground distance relay cannot prevent a three phase tripping caused by cross-country faults between dissimilar phases of different circuits.This paper introduces a newly developed μC-based digital distance relay,not only able to be employed in a single-circuit line but also suitable for a same-tower double circuit line.As it can correctly select a fault phase in case of complex cross-country faults.The paper emphatically describes its design scheme and the real-time test on a computer-simulation system.The paper also gives the block diagrams concerned as well as the test results.

    对于常规的相间和接地距离继电器而言,在同杆平行双回线上应用是十分困难的问题;由于双回线上两个非同名相之间的跨线故障会造成双回线的三相电路均被切除,故常规距离继电器并不能适用于同杆双回线。 本文介绍一种用微型计算机构成的数字式距离继电器,它既能用于单回线也能用于双回线,具有在复杂的跨线故障情况下正确选相的能力;本文着重阐述该装置的具体设计方案和实时试验,并示出有关框图和试验结果。

    This protective relaying system is designed for 330kV Ankang-Nanjiao double-circuit line on same tower in North-West China. It is a complex transverse differential protection which includes current balance relays and current phase comparison relays. It possesses high speed, high sensitivity, low burden for CT and PT, and sophisticated function of phase-selection. Besides, based on the automatic blocking circuits, maloperation of the protection can be avoided when one of the parallel lines is disconnected....

    This protective relaying system is designed for 330kV Ankang-Nanjiao double-circuit line on same tower in North-West China. It is a complex transverse differential protection which includes current balance relays and current phase comparison relays. It possesses high speed, high sensitivity, low burden for CT and PT, and sophisticated function of phase-selection. Besides, based on the automatic blocking circuits, maloperation of the protection can be avoided when one of the parallel lines is disconnected.

    本保护装置根据西北地区330kV安康—南郊同杆双回线的要求,由三方联合开发研制。可提供电流平衡、电流比相以及适用于各种运行方式变化的复合横联保护,具有动作速度快(近处故障时小于15ms)、灵敏度高(相继动作区小于10%)、功耗小及独立选相等优点。保护具有完善的闭锁回路,在出现任何形式的单回线运行方式时,能自动闭锁保护,防止误动作。

     
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