能量融通型STATCOM提高牵引变电站供电能力研究

Capacity improvement based on power accommodation STATCOM for traction power supply

针对重载铁路大秦线扩能引起的电压质量问题,提出采用能量融通型STATCOM对牵引变电站低压侧进行综合补偿,在不新增牵引变压器容量和更换设备的条件下,将轻载臂的能量融通至重载臂,并补偿重载臂无功,从而有效提高牵引变压器容量利用率和牵引网电压水平。重点分析了Scott型牵引变压器低压侧补偿模型和容量利用率,并建立了相应的PSCAD仿真模型和实验室样机,验证了所提出的能量融通型STATCOM对提高牵引供电能力的有效性。

Aiming at the power quality problem caused by transport capacity expansion,it is proposed to apply the power accommodation STATCOM at low-voltage side of traction power station for comprehensive compensation,which compensates the reactive power and accommodates the active power from heavy-load arm to light-load arm to improve the capacity efficiency of traction transformer and the voltage level of traction network without transformer capacity increase and equipment retrofit.The compensation model and capacity efficiency of Scott-type traction transformer are emphatically studied and the relative PSCAD model and prototype are built,which verifies the effect of the power accommodation STATCOM in power quality improvement.