阻抗匹配平衡变压器单相负荷平衡补偿的研究与分析计算

The Study,Analysis and Calculations of Balance Compensation for the Impedance Matching Balance Transformer When Carrying Single Phase Load

阻抗匹配平衡变压器 ,是一种三相变两相的供电设备 ,已广泛用于我国电气化铁道 .对于单相负荷 ,通常原方三相电流是不平衡的 ,但通过补偿 ,也可实现平衡变换 .这一新的发现 ,对有的单相负荷容量较大 ,且电网容量不大 ,经受不了较大负序干扰的地方 ,能使原方三相系统保持对称运行 .本文对单相平衡变换的条件进行了较详细的分析和计算并通过模型机试验 ,验证了其可行性 .

The Balance Transformer Accroding to Impedance Matching which has been widely used in electric railway is a kind of three-phase to two-phase power supply equipment.The single phase load is generally not considered as balance,but its balance transformation can be realized by compensation.When the capacity of power supply network is not so large compared with that of the single phase loads that it can not bear the negative influence,the theory discussed in this paper render the primary three phase system symmetry.This paper analyses and calculates the related condition of single phase transformation of balance in details.The test of practical model proves its feasibility.