分层三相配电网潮流算法及变压器详细模型推导  

Power flow algorithm of layered three-phase distribution network and development of detailed transformer models

作　　者：李红伟[1] 孙宏斌[2] 陈贵[1] 

机构地区：[1]西南石油大学电气信息学院,四川成都610500 [2]清华大学电机工程与应用电子技术系,北京100084

出　　处：《电力自动化设备》2012年第8期41-47,共7页Electric Power Automation Equipment

基　　金：国家杰出青年科学基金资助项目(51025725);四川省教育厅科研项目(11ZA022)~~

摘　　要：提出一种基于道路矩阵的分层三相配电网潮流算法,该算法把复杂的配电网划分成较小的子网络来计算。通过把变压器看作一个特殊的层模块,实现了含变压器的三相不平衡潮流计算。推导了变压器的详细模型,该模型考虑了绕组连接方式、相位偏移、分接头位置、绕组阻抗不对称和中性点接地阻抗等问题,同时该模型解决了基于节点导纳矩阵模型中的导纳阵奇异的问题。IEEE算例分析表明,所提算法和变压器模型是合理和正确的。A power flow algorithm based on path matrix is developed for the layered three-phase distribution network,which divides a large and complicated distribution network into several small and simple subnetworks and considers the distribution transformer as a special layer in the calculation of three- phase unbalanced power flow. Detailed transformer models,considering the winding connection modes ,phase shifting ,off-nominal tapping,winding impedance asymmetry and neutral point grounding impedance,are developed,which avoid the singularity of transformer admittance matrix in traditional models. Case study for IEEE test system proves the proposed algorithm and transformer models are correct and reasonable.

关 键 词：潮流 配电 变压器 模型 分层算法 道路矩阵 

分 类 号：TM401.1[电气工程—电器] TM727.2