Due to three-phase capacitance to ground, certain voltage exists between the neutral and the ground for a generator with ungrounded neutral.
对于中性点不直接接地的发电机,由于三相对地电容值存在差异,中性点与地之间存在一定电压。
In distributions, because of its low-level voltage, its neutral point used to disconnect to the ground in order to improve its reliability.
城市配电网因为其电压等级较低,为了提高系统供电的可靠性,曾广泛采用中性点不接地系统方式。
R5 and R8 set a small bias level to reduce the otherwise quite wide neutral deadband caused by the forward voltage drops of the 1n4148's.
R5的和r8设置一个小的偏见水平,以减少,否则相当广泛中立的死所带来的正向电压下降的1n4148的。
This dual path approach means that a single control voltage level signal doesn't have to traverse the full reverse range to get to neutral.
这种双重路径的做法,就是一个单一的控制电压水平,信号没有遍历充分扭转范围去中立。
Therefore, the over-voltage caused by the electromagnetic voltage transformer saturation in the system with insulated neutral belongs to shifting over-voltage.
故可得出结论:在中性点绝缘系统中,因电磁式电压互感器饱和引起的过电压现象属于工频位移过电压。
The problem of neutral-point balance is resolved by changing the amplitude of current reference according to the voltage error of two capacitors.
通过两输出电容电压的偏差改变电流参考给定来实现整流器输出中点平衡。
A dynamic hysteresis-band current PWM control arithmetic is also designed to control the voltage of the DC bus, which keeps it steady effectively for the voltage of the neutral point of the DC bus.
设计了动态电流滞环pwm控制算法对直流侧电压进行控制,有效地保证了直流侧中点电位的平衡。
In the neutral ungrounded power system, ferroresonance over-voltage due to electromagnetic transformer takes place frequently.
在中性点不接地电网中,频繁发生由电磁式电压互感器引起的铁磁谐振现象。
But unlike metal, once the voltage is switched off, the plasma rapidly returns to a neutral gas, and the antenna, in effect, disappears.
但和金属不同的是,一旦切断电压,等离子便迅速地变回中性气体,因而其天线作用也就真正地“隐形”了。
The neutral voltage of the three-phase four-leg inverter employed in UPS is desired to be very low.
当三相四桥臂逆变器用于UPS时,要求其中线电压很低。
The neutral-point voltage fluctuation of three-level converter is only related to applied modulation method and three-phase current.
三电平变流器的中点电压波动只与变流器采用的调制技术和三相电流有关。
The neutral-point voltage fluctuation of three-level converter is only related to applied modulation method and three-phase current.
三电平变流器的中点电压波动只与变流器采用的调制技术和三相电流有关。
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