Electromagnetic Transient Models of Bridge Thyristor Converters for Multirate Simulation of Large Power Systems

M. Borodulin
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引用次数: 0

Abstract

In large power system simulations with positive-sequence root-mean-square (RMS) dynamic programs, bridge thyristor converters of conventional HVDC transmissions are usually represented by equations describing steady-state operation. The use of electromagnetic transient (EMT) bridge converter models reflecting commutations of the thyristor valves can enhance the accuracy of RMS simulations of large power systems with HVDC transmissions. The development of efficient EMT models suitable for multirate simulation with commercial RMS dynamic programs is a challenging task. The paper focuses on EMT models of the single-bridge (Graetz) converter and multi-bridge converters. The thyristor valve is represented by a variable resistor in parallel with a resistor-capacitor branch (the R-RC representation). R-RC bridge models are presented for line-commutated and capacitor-commutated converters. The paper discusses numerical solution of the differential and algebraic equations of the R-RC bridge models and their interface with the main RMS dynamic program.
用于大型电力系统多速率仿真的桥式晶闸管变换器电磁暂态模型
在采用正序均方根(RMS)动态程序的大型电力系统仿真中,传统高压直流输电的桥式晶闸管变流器通常用描述稳态运行的方程来表示。利用反映晶闸管换向的电磁暂态(EMT)桥式变换器模型可以提高大型高压直流输电系统RMS仿真的准确性。利用商业RMS动态程序开发适用于多速率仿真的高效EMT模型是一项具有挑战性的任务。本文重点研究了单桥变换器(Graetz)和多桥变换器的EMT模型。晶闸管阀由一个可变电阻和一个电阻-电容分支并联表示(R-RC表示)。提出了线路整流和电容整流变换器的R-RC桥模型。本文讨论了R-RC桥梁模型的微分方程和代数方程的数值解及其与RMS主动态程序的接口。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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