| 变压器中性点经消弧线圈接地的优缺点 |
| 添加时间：2019/5/6 14:59:20 浏览次数： |
| 指变压器的中性点经过一个或多个消弧线圈接地，当系统发生单相接地故障时，消弧线圈产生的电感电流补偿系统的容性电流，防止弧光短路，保证供电安全。 The neutral point of transformer is grounded by one or more arc suppression coils. When single-phase grounding fault occurs in the system, the inductance current generated by the arc suppression coil compensates the capacitive current of the system, prevents arc short circuit and ensures the safety of power supply. 中性点经消弧线圈接地具有以下优点： The neutral point grounded by arc suppression coil has the following advantages: 1.经消弧线圈的感性电流补偿后使接地故障电流小于10A,电弧可自然熄灭。 1. After the inductive current compensation of arc suppression coil, the grounding fault current is less than 10 A, and the arc can be extinguished naturally. 2.带单相故障可以运行2个小时 2. It can run for 2 hours with single-phase fault. 3.大大降低了间歇性弧光过电压的可能性 3. The possibility of intermittent arc overvoltage is greatly reduced. 中性点经销弧线圈接地的缺点： Defects of neutral point distribution arc coil grounding: 1.谐波电流较大时，不能补偿谐波电流 1. When the harmonic current is large, the harmonic current cannot be compensated. 2.脱谐度过小时，容易引起系统谐振过电压，并使中性点电压偏移放大，可能引起误发接地信号 2. If the degree of detuning is too small, it will easily lead to resonance overvoltage of the system and zhongyaocai.71ix.combaohuqi.07858.netzaoxingzd.37ix.com.cnlangfang.71ix.cnamplify the neutral point zhongyaodou.71ix.comkakou.37ix.com.cnvoltage offset, which may lead to wrong grounding signal. 3.脱谐度过大时，会产生间歇性弧光接地过电压 3. Intermittent arc grounding overvoltage will occur when the detuning degree is too large. 4.容量选择手调节容量的限制 4. Capacity Selection Hand-regulated Capacity Limitation 5.投资比电阻接地方式高 5. Investment is higher than resistance grounding 6.使用寿命比电阻接地方式短 6. Shorter service life than resistance grounding |
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