Z型接地变压器在PSCAD下的仿真模型构建

摘要

PSCAD是电力系统常用的仿真软件，在利用其进行电力系统仿真时却发现在元件库中不存在实际常用的Z型接地变压器。针对在仿真中发现的问题，文章在分析Z型接地变压器原理的基础上，利用PSCAD中的单相三绕组变压器模块，设计搭建了Z形接地变压器模型，并对其进行了理论分析和仿真验证。通过对某35kV配电网经消弧线圈接地系统的仿真表明该接地变压器模型设计合理，从而为中性点接地系统建立正确仿真模型奠定了基础。%PSCAD is a commonly used simulation software in power system, but there isn’t the commonly used zigzag grounding transformer in the component library. In view of this problem, based on the analysis of the principle of zigzag grounding transformer, this paper designed and built the zigzag grounding transformer model, and carried on theoretical analysis and simulation verification. The simulation of a 35kv power distribution network earthing via arc extinguishing coil system shows that the design of the grounding transformer model is reasonable, thus laying a foundation for neutral point grounding system to establish a correct simulation model.