跨步电压

镜像法在接地电阻与跨步电压计算中的应用

Application of the Mirror Image Method in Calculating the Earth Resistance and Step Voltage

接地电阻测量值在0.028~0.029Ω，最大跨步电压小于2.5V，均没有超过设计水平。

The earth resistance observed value is between 0.028 ~ 0.029 Ω . The biggest step voltage is smaller than 2.5 V , and not surpassed the design level .

冲击泄流时接地体附近跨步电压的FDTD分析

FDTD Analysis of the Step-voltages near a Grounding Electrode under Impulse Current Discharge

开创性地运用有限元分析软件ANSYS来定量仿真发生单相对地短路后的跨步电压，仿真结果与理论计算结果基本吻合。

The step voltage when the single phase short-circuit fault occur is calculated quantitatively with the finite element analysis software ANSYS .

IEEEstd80-1986和IEC-471-1都对接地系统的安全评估的标准进行了定义，且两种标准都是根据人体允许通过的电流进行定义，并将其转换为允许的接触电压和跨步电压。

IEEE Std 80-1986 and IEC-479-1 are defined the standard of safety assessment of grounding systems . Both standards define safety criteria in terms of allowable body current . The allowable body current is then translated into the allowable touch and step voltages .

采取3m×3m均压网、块石、沥青混凝土地面填层等，以降低配电装置范围内的接触电压与跨步电压，保证运行安全。

In order to lower contact voltage and cross voltage around switch device , to insure operation safety , we also take some measures , such as using voltage balance net with sizes 3m × 3m , block stone , asphalt concrete grouting layer on ground , etc.

跨步电压演示实验设计及其解析

Designing and Analysis of Showing Experiment about the Stepping Voltage

一种消除跨步电压威胁的大楼防雷接地方式

A new method to lighten protection and grounding to eliminate the pace voltage threat

雨季将导致地网接地电阻及地表跨步电压减小，但有可能导致接触电压增加。

In the raining season , the grounding resistance is reduced ; but the touch voltage is probably increased .

接地系统的接地电阻、接触电压及跨步电压随高阻层的厚度或电阻率的增加而增加。

The grounding resistance and the step and touch voltages of the grounding system increase with the thickness or resistivity of the high resistivity soil layer .

均匀网孔地网造成发电厂、变电站跨步电压和接触电压不均，可能对安全造成危害。

The even network creates the power plant , the transformer substation step voltage and the contact voltage is uneven , possibly to causes the harm .

分析认为，雷电击中大树产生的雷电反击和跨步电压是造成这起雷灾的主要原因。

According to the analysis , the back flashover and the step voltage formed when the lightning strikes a tree are the main causes of the disaster .

本文详细分析了人体的安全电压、接地电流和对地电压、接触电压和跨步电压，论述了电气设备的接地保护必要性。

To equalize the potential and decrease touch voltage and step voltage on the earths surface , an optimum design of grounding systems is proposed in this paper .

以往的电力规程中，在接触电势、跨步电压满足的前提下，发电厂、变电所的接地电阻小于0.5Ω即可。

According to the previous power system design standards , it is only required that the grounding resistance on the step voltage and touch voltage is less than 0.5 Ohm .

接地系统的安全评估是人体实际所承受的最大接触电压和跨步电压与最大的安全允许电压进行比较的测试。

Safety assessment of grounding systems is a testing that the actual maximum touch and step voltages are computed and compared to the maximum allowable ( safe ) touch and step voltages .

季节因素将影响地网的安全性能，导致地网的接地电阻、接触电压和跨步电压的改变。

The seasonal factor affects the safety of grounding system , and causes changes in the grounding resistance , the step and touch voltages on the ground surface above the grounding system .

本文从高层建筑物的防雷要求、钢筋砼基础接地体的应用及如何处理好跨步电压三大方面论述了搞好高层建筑物防雷接地设计的重要性。

This paper discusses high building preventing thunder earthing design and its importance from the requirement of high building preventing thunder , reinforcing steel bar concrete base earthing body and step voltage disposing .

分析表明，增设垂直接地极能有效减低接地系统的接地电阻、减小发变电站的接触电压和跨步电压、减小季节因素对地网安全性的影响。

The results show that the vertical grounding electrodes can effectively decrease grounding resistance , step and touch voltages of the grounding system and reduce the influence of seasonal factors on the grounding system .

用该方法可以计算接地网的工频电流下的任何参数，如工频接地阻抗、接触电压和跨步电压、网内电位差等。

The methods are able to compute any parameter of grounding grids in power current , such as power ground impedance , touch and step voltage , potential differences within grounding grids and so on .

发变电站的接地系统的设计目标是为了保证在电力系统发生故障时，快速切断电源或者限制产生接触电压和跨步电压至人体可承受的范围来保证工作人员的人身安全。

The goal of substations grounding system design is to ensure the power system when it is at fault , by cutting off power supply quickly or restricted the contact voltage and step voltage which maybe threat personal safety .

第六章结合驻马店市电业局两个变电站接地网设计及改造的具体实例，因地制宜地做出了设计及改造方案，实施后接地电阻、接触电压和跨步电压均达到要求。

In Chapter 6 , as examples , the grounding nets of two substations in Zhumadian are designed and reconstructed . After improvement , the grounding resistance , the touch voltage and the step voltage arrive to the requirement .

用矩量法计算埋在二层土壤中含水平钢筋的矩形钢筋混凝土接地网在地面上产生的电位，并绘制地面电位、接触电压、跨步电压的三维分布图。

With the Moment Method , the systematic grounding electric potential of the rectangular concrete grounding grid with the horizontal reinforcing bars in two-layer soil has been calculated and the three-dimensional distribution map of electric potential of ground has been drawn in this paper .

结果表明，深井阳极阴极保护对接地网不存在电压反击问题，也不影响接地网热稳定性；同时也满足变电站关于跨步电压和接触电压的安全要求。

It is showed that the cathodic protection technology does not exist problem of voltage anti-shock to the grounding grid and affect the heat stability of the grounding grid . The secure requirement of step voltage and touch voltage of substation is also satisfied .

传统的采用经验公式的设计计算方法，由于误差较大和不能给出整个地表面电位、跨步电压及接触电压的分布，并且灵活性差，已经很难满足现代设计的要求了。

Traditional use empirical formula design calculation method , because the error big and cannot produce the entire superficial electric potential , the step voltage and the contact voltage distribution , and flexibility bad , already very was difficult to satisfy the modern design the request .

以往受科学技术的限制，早期的电力系统工作者设计时比较重视变电所或电厂内人为或设备原因造成单相接地短路障时的跨步及接触电压安全。

Previously subject to the limitations of science and technology , early power system design workers more concerned with power plant or substation equipment or man-made causes of single-phase ground short of the roadblock when the voltage step and contact security .