赤峰变压器_0

赤峰变压器
概述
       在中性点不系统(又称小电流系统)中(一般用在35k V及以下电网)发生单相时，非的任何一相对地电压将升高根号3倍，电容电流为正常运行时一相对地电容电流的3倍，较易引起间歇电弧。由于回路振荡的影响，引起系统过电压可达2.5—3倍。
       赤峰变压器赤峰变压器侧，我国一般为D联结(也有“Y”联结)，没有中性点可。为了在电容电流较大而又没有中性点时，系统中必须人为地造出一个中性点，就是必须采用一台赤峰变压器来达到。赤峰变压器是一台曲折形联结的电抗器，使电网形成一个人为中性点，以便经消弧电抗器。
       电网正常时，赤峰变压器三相承受对称电压，故流过很小的励磁电流，其中性点对地电位为零，赤峰变压器处于空载，消弧电抗器内设有电流流过。
 

Grounding transformer
 
Outline
Isolated neutral system (also known as the small current grounding system) (generally used in the 35k V and below the grid) to single-phase, non-grounded ground voltage will rise by three times the square root of the capacitance current normal operation when a relative capacitance of the current times, are prone to causing intermittent arc. Loop oscillation, causing the system over-voltage up to 2.5-3 times.
    The main substation transformer low voltage side, China is generally D links ("Y" links), there is no neutral point earthed. Larger capacitive current and a grounded neutral point, the system must artificially create a neutral point is the need to achieve a grounding transformer. Grounding transformer is a zigzag connection reactor grid to form an artificial neutral point, so that the arc reactor grounding.
    The grid normal, grounding transformers three-phase exposed to symmetrical voltage, so the flow through the small excitation current, which nature points to potential zero, the grounding transformer in no-load, the arc reactor equipped with a current flows through.