本文阐述了电网低电压运行时对用电设备及电网的危害，以及一些防止措施。
In this paper, the detriment of power grid low voltage operation to electric equipment and power system and some preventive measures are described.
自愈式低电压并联电容器在电网中被广泛使用，为了考核其在电网中运行的可靠性，对其进行破坏试验是十分必要的。
Self-healing low-voltage shunt capacitor is widely used in network, to check its reliability in network operation, it is very necessary for destruction test.
为了复合为此，有人芯片运行在一个比较大电流低电压。
To compound this, the chip was made to run at a low voltage with a relatively high amperage.
电弧炉具有低电压、大电流而且负荷非线性的特点，在其运行过程中产生大量的负序电流，导致电网不稳定。
The characteristics of arc furnace are low voltage, big current and nonlinear load. Much negative sequence current is produced during running. As a result, the power net is unstable.
高低电压自动监测和保护功能； 产品按照每年365天，每天24小时运行长寿命设计。
With high and low voltage automatic monitoring and protection function is good for 365 days a year, 24 hours a day running time.
为增强直驱型变速恒频风电系统的低电压穿越能力，采取了变流器直流侧增加卸荷负载以在故障时消耗掉直流侧多余的能量，使风电机组的正常运行基本不受电压跌落影响的应对措施。
By adding damp load at DC-side of the converter, redundant energy at DC-side during grid faults will be consumed, therefore the operating of wind turbine will not be influenced by grid voltage sags.
风电变流器在国产化的过程中也必须要具有低电压穿越、不对称故障下运行的能力和动态无功、有功功率的调节能力。
The wind power converter must possess abilities of Low voltage Ride through (LVRT), available operation with unbalanced voltage fault and adjusting active as well as reactive power.
风电变流器在国产化的过程中也必须要具有低电压穿越、不对称故障下运行的能力和动态无功、有功功率的调节能力。
The wind power converter must possess abilities of Low voltage Ride through (LVRT), available operation with unbalanced voltage fault and adjusting active as well as reactive power.
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