摘要
星形延边三角形接线平衡变压器是应用于我国电气化铁道的一种新型三相—两相平衡变压器。针对其特殊的接线形式,提出了以磁势平衡方程、绕组连接方程、端口输出方程和电压传递方程为基础的多绕组变压器系统化分析方法。根据理想平衡变压器的技术条件提出了基于绕组之间短路阻抗的阻抗匹配关系式,推广了以前的有关结论。讨论了星形延边三角形接线平衡变压器的等值模型、两相等值电路和中性点不接地运行等问题。给出了星形延边三角形接线平衡变压器在相坐标下的节点导纳矩阵,以便与电力系统其它部分接口进行有关分析。
The wye-prolonged delta connected balance transformer is a new 3-phase to 2-phase balance transformer, which has been used in electrified railway in China. A systematic analysis method for multi-winding transformer, based on the magnetomotive force balance equations, winding connection equations, output-port equations and voltage transfer equations, has been presented to deal with the distinct connection of this transformer. According to the technique demands of ideal balance transformer, impedance matching relations, expressed with the winding-winding short circuit impedances, are put forward, which generalize the existent conclusions on the wye-prolonged delta transformer. Several problems of the transformer, such as equivalent model, 2-phase equivalent circuit and operating performance with neutral isolation are discussed. Finally, its nodal admittance matrix in phase coordinates is derived, which can be used to interface with the other part of power systems in related analyses.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2004年第11期160-166,共7页
Proceedings of the CSEE