偏移特性阻抗继电器常用于小电流或大电流接地系统中作为输电线路距离保护的测量元件。
LZ-22 partial impedance relay usually used as measuring element on distance protection of the line at small or big current power system.
直流输电线路距离往往上千公里,线路越长、发生故障的概率越高,同时查找故障点的难度也越大。
The longer the lines are, the greater probability of line fault is, and the more difficult it will be to find the fault location.
在线路距离保护段范围发生故障时,利用对侧开关跳闸时序电流的突变量加速本侧保护的跳闸,改善了保护的性能。
This paper presents a novel approach to accelerated trip of power transmission lines by using biorthogonal wavelet transform to improve the performance of protection relays.
结果显示,出游周期、原交通方式选择、游览目的、观光巴士线路包含景点数量、出发地与观光巴士线路距离是决定选择行为的因素。
The results show tour period, original travel mode choice, tourism purpose, sites quantity included in the route, distance between origin and the route are significant variables.
一般来说,乡村和郊区与市区相比,其网络线路铺设距离大,天气环境状况差,从而其网络维护成本更加昂贵。
Rural and suburban installations typically involve longer distances and tougher weather conditions than urban ones, making upkeep of the network more expensive.
对于长距离线路,传统的铜线总是比光纤连接慢。
For long distances, traditional copper cable will always be slower than using a fibre optic connection.
MapMyRun:使用这个作者最喜爱的Google地图mashup之一标示跑步线路并获得准确的距离。
Map My run: Plot your run and get accurate distances with one of the author's favorite Google Maps mashups.
在那之后都是一些好的支点(不过对我而言距离好远),只要坚持住,运用一些脚法,我最终爬到顶端完成了这条线路。
After it is just a question of endurance for my part with the goods hold (quiet long for me) and some technical sequences of foots and to go the top.
美国领导人并不知晓自己距离航图线路偏离了多远,但他们了解必须作出调整才能重返航线。
The country's leaders didn't know how far from their charted path they'd been swept, but they recognised a need to make a course correction.
于是已经知道后一条线路的距离是一样的,我们只需要去计算该距离即可。
So having seen that the latter route is the same distance, we just need to calculate the distance for that.
800千伏特高压直流变压器是实现远距离、大容量输电的特高压输电线路的关键设备。
The 800 kV UHVDC transformer is a key component of ultrahigh-voltage power links that deliver large amounts of electricity over very long distances.
本文结合矿用供电网的实际情况和保护系统的现状,针对现有技术保护距离较短的缺点,提出了一种针对矿用供电线路的远距离故障在线监测的方案。
According to the actual situation of power supply network and protection system under mine, a long distance faults online monitoring program is presented for overcoming the short protection distance.
这里三次样条函数中参数几何意义是沿曲线路径单调增长的距离。
The geometric meaning of the parameter is the mono increasing distance along the curve path.
对常用的几种电梯列表给出电源开关、供电线路规格和在规定的电压损失下的供电距离。
The paper lists power switches, specifications of power supply line and power supply distance under specified voltage loss for commonly-used elevators.
第二是这条线路的商业案例,计划中的“在2043年之前长距离铁路使用翻一翻”听起来有些好高骛远。
Second, the business case for the line: the projected doubling of long-distance rail use by 2043 seems ambitious.
如超长距离输电装置、紧凑型线路、无功动态并联综合补偿技术、大截面耐热导线以及新型安全自动装置等。
For instance, extra long distance implement, tight power line, idle dynamic parallel integrated compensation, big section heat-resistant wire, new-style security automechanism, and so on.
根据集中参数线路模型算法的实测距离,换算成与模型匹配的正序测量阻抗。
The measured distance of the lump parameter circuit model can be converted to the correspondingly matching positive sequence measured impedance.
本文根据一些远距离供水工程的设计实践,对水源选择、输水方式和线路优选等问题提出了见解。
This paper provides some Suggestions concerning the selection of water resources, the method for water transportation and pipeline optimization on the basis of design practices.
距离保护测量元件在线路保护中有广泛的应用。
The measuring elements of distance protection are extensively applied in transmission lines protection.
某一电压等级的输电距离,受输电线路的电压损失及输送容量限制。
The transmission distance at certain voltage level, is restricted by power line's voltage loss and transmission capacity.
实验结果是在某一距离以内,压缩的数字图像信号经过低压电力线路传输后质量得到保持,具有较高的清晰度和自然度。
The testing results show that compressed digital images transmitted over low-voltage power lines maintain good quality which has high clarity and naturalness within a certain distant.
需要注意的是如果变压器和线路耦合元件精确的已知,识别算法在无噪声环境里精确的距离超过18千英尺。
It should be noted that if the transformer and line coupling components are known precisely, the identification algorithms are accurate beyond 18 KFT for noiseless conditions.
分析表明,线路末端三相故障时,线路首端的测量阻抗不与故障距离成正比。
The analysis shows that the measured impedance at the head of the line is not proportional to the fault distance when a three-phase fault occurs at the end of the line.
本文针对串联补偿线路接地距离保护,提出了一种新的电抗补偿系数方法。
In order to improve measuring accuracy of the earth-fault distance protection of series compensated line a new method which employs the reactive compensation factor is presented in this paper.
结果表明,该算法具有良好的高频特性,适用于高压和超高压输电线路的距离保护。
The results of simulations and tests proved that this algorithm possesses excellent performance and is suitable for EHV transmission line protection.
针对送电线路设计过程中,边导线风偏后对地距离的检查及处理的不足之处,建立较为精确且实用的计算公式,并实现微机自动处理。
A new, more exact and practical calculating formula is given for the wind-deviation of the transmission line and the procedure can be realized in computer.
提出了适用于平行双回线路的零序距离继电器新判据。
A double lines distance relay based on the zero sequence components is presented.
本文从选线的原则、选线需搜集的基础资料等角度,论述了长距离输煤管道线路的选线方法。
Discusses the selection line methods of convey coal pipe of long distance, from the angles of selection line principle, and the basic data to collect, etc.
但是短线路在两相短路时,由于测量电压的误差会放大,可能引起距离保护的超越。
Because the voltage measuring error increases when phase to phase short circuit occurs, distance relay protection will act improperly.
就长距离超高压送电线路工程的GPS测量中如何选择大地水准面模型,如何确定GPS测量的高程等问题进行了讨论。
This paper has discussed how to select geoidal model and how to determine normal height in GPS survey of long distance transmission line project.
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