从BPA到EMTDC的动态模型转换

Conversion of Dynamic Models from BPA to EMTDC

电磁暂态分析对现代电力系统的作用已日益显著,而各个电网的数据大多是稳定分析格式的,构建从稳定数据到电磁暂态数据的转换平台显得尤为重要。本文首先介绍了从BPA到EMTDC的潮流转换原理,给出潮流转换不一致时的解决方法。在此基础上阐述了发电机模型转换方法,给出了励磁模型、PSS模型、调速器模型和原动机模型的对照关系。通过两区域四机系统仿真,验证了从BPA到EMT-DC的动态模型转换的有效性。

At present,electromagnetic transient analysis plays an increasing significant role in modern power systems.Since the data of power grids are generally given in the form of stability analysis,it is particularly important to construct a platform to convert the data in the form of stability analysis to that in the form of electromagnetic transient analysis.This paper describes the principle of the power flow conversion from BPA to EMTDC,and provides the method to solve inconsistent results by the power flow conversion,based on which the approach of converting generator model in BPA to that in EMTDC has been illustrated,and the corresponding relations of excitation system,PSS,governor and prime mover between BPA and EMTDC have also been given.The effectiveness of the conversion of dynamic models from BPA to EMTDC has been validated by two-area four-machine system simulation.