配电线路抗饱和等效模型及实物化方法

摘要

Distribution line is an important component of distribution system and its centralized materialization mostly satisfying its distributed characteristics is essential in the construction of dynamic distribution network simulation platform.A method for materializing the equivalent distribution line model is proposed based on the Π-type line model covering the line resistance,inter-phase capacitance,line-to-earth capacitance,line self-inductance and inter-line mutual-inductance.The advantages and disadvantages of various inductor models are analyzed and the hollow ring solenoid structure is proposed,which can not only resist the inductor saturation but also enclose the magnetic flux in the coil to inhibit the leakage of magnetic field.Experiments are carried out to verify the magnetic field closeness and transient characteristics of the line model and results show that the proposed model can be used to simulate the real distribution line.%配电线路是配电网系统重要的元件,在尽量满足分布特性的情况下,将其集总实物化是构建配电网动态模拟平台的关键环节.以Π型线路模型为基础,提出配电线路等效模型实物化方法.所提模型涵盖了线路电阻、相间电容、对地电容及线路间自感和互感;在分析各种电感模型的优缺点后,提出了空心螺线环形结构,不仅可以抗电感饱和,还可将磁通封闭在线圈内部,抑制磁场泄漏.最后通过实验对线路模型的磁场封闭性和暂态变化特性进行验证,表明所提模型可用于模拟真实配电网线路.