After the neutral point is grounded through perterson coil , it can decrease the capacitor current through fault point and the over - voltage caused by the grounding fault , which is advantage for the extinguishments of electric arc 中性点经消弧线圈接地后，有效减小了流过故障点的电容电流，减小了弧光接地过电压，有利于电弧熄灭。
In this system , once the method of selecting line with fault is perfected , the method of neutral point grounding through perterson coil will be the preferred method of neutral grounding in power supply networks without doubt 在这种系统中，一旦接地选线保护方法完善，消弧线圈接地方式无疑将成为配电网中性点接地方式的首选之一。
After the neutral point is grounded through peterson coil , it can decrease the capacitor current through fault point and the over - voltage caused by the grounding fault , which is advantage for the extinguishments of electric arc 中性点经消弧线圈接地后，有效地减小了流过故障点的电容电流，减小了弧光接地过电压，有利于电弧熄灭。
Transformer neutral point overvoltage relaying protection main includs nod gap and arrestor protection . in this paper , principle of parameter choice and different function of above - mentioned protection are analysed 摘要变压器中性点过电压保护装置主要有棒间隙保护和避雷器保护两种，文中分析了这两种保护装置的不同作用和参数选择的原则。
It has been proved by test results that this protective method is suitable not only for neutral point insulated system , but also for neutral point grounded system through arc suppression coil 实验结果表明：该保护原理不仅适用于中性点绝缘的供电系统，而且适用于中性点经消弧线圈接地的供电系统，提高了选择性漏电的动作可靠性，保证了动作值的稳定性。
The result of simulation and test verified that this algorithm is simple to be carried out , and harmonics in output waveform are small , and neutral point voltage can be controlled very well , and narrow pulse problem is solved as well 仿真和实验结果表明，该方法实现简单，输出波形谐波含量小，中点电位得到很好的控制，并较好地解决了窄脉冲问题。
On the basis of improvement of a simple but effective three - level svpwm algorithm , a simple neutral point balancing and narrow pulse elimination algorithm without current sensor is proposed . and dead time is compensated in the algorithm also 本文在对一种简洁高效的三电子svpwm算法改进的基础上，提出一种无电流传感器的中点电位控制和窄脉冲消除方法，同时进行了死区的补偿。
The resistance products have various types , and are for different lightning arrester , restrictive transformer , capacitor , electric machinery , vacuum switch , transformer neutral point sealed electrical instruments , cable , and railway line overvoltage 该电阻片具有多种规格型号，用于组装不同使用场所的避雷器，限制变压器、电容器、电机、真空开关、变压器中性点、全封闭电器、电缆、铁道线路的过电压。
The factors that cause negative friction are discussed . the mechanism of negative friction and the methods decreasing it are also studied . the neutral point and negative friction are determined according technical code for building pile foundation 对单桩负摩阻力的产生原因、产生机理、减少负摩阻力的方法、建筑桩基规范中负摩阻力的确定方法、负摩阻力中性点位置的确定、以及对荷载传递基本微分方程的推导都进行了论述。
The generators are of three - phase four - wire type , making use of star connection with neutral point . the rated line voltage is 400v . phase voltage 230v . frequency 50hz , power factor 0 . 8 ( lag ) . it can provide 60hz and the other voltage ' s generator according to necessary 本发电机为三相四线制，采用带有中性点的星接法，额定电压为400伏，相电压为230伏，频率50赫，功率因素0 . 8 （滞后）根据用户需要，也可提供60赫及其它电压值的发电机。
