牵引移相变压器网侧谐波消除研究

Harmonic Elimination of Grid-side Current in Traction Phase-shifting Transformer

对24脉波移相牵引整流移相变压器的结构、移相原理和谐波电流的相移进行了研究,通过公式推导出这种变压器与谐波电流可以互相抵消,并在某牵引整流站进行了实测,证明这种变压器构成牵引整流站对城市电网的影响完全在电网电压的波动范围之内。

In this paper, the structure of 24-pulse phase-shifting traction rectifier and phase-shifting transformer has been discussed. The phase-shifting principle and the shift phase of harmonic current are then studied. Through the formula derivation, we find harmonic current can be eliminated in this transformer. The practical measurement has been made with the impact on a certain traction rectifier station of power grid. In conclusion, the impact of a traction rectifier station constituting of this transformer on urban power grid is entirely within the scope of voltage fluctuation.