Equivalent modeling of electromagnetic transient simulation for hybrid braking resistance converter

被引：0
|
作者：
Zhao Z. [1 ]
Tian Y. [1 ]
Xue Y. [1 ]
Lei X. [2 ]
Yang Z. [2 ]
Hu Z. [2 ]
机构：
[1] State Grid Economic and Technological Research Institute Co., Ltd, Beijing
[2] China Three Gorges Mechanical and Electrical Engineering Co., Ltd., Chengdu
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2021年 / 41卷 / 07期
关键词：
Electromagnetic transient modeling; Hybrid braking resistance converter; Nested iteration; Power surplus; Thevenin equivalent;
D O I：
10.16081/j.epae.202104001
中图分类号：
学科分类号：
摘要：
In order to solve the problem that the huge number of network nodes in the original model of hybrid braking resistance converter in the VSC-HVDC(Voltage Source Converter based High Voltage Direct Current) system with island new energy resources seriously restricts the speed of electromagnetic transient simulation, an equivalent modeling method for hybrid braking resistance converter based on Thevenin equivalent and nested iteration is proposed. In this method, the whole branch is divided into four kinds of sub-module networks with different operation states. The Thevenin equivalent circuit of each sub-module network is obtained based on the triggering instruction combination of main and auxiliary switching devices in the sub-modules, and the synthetic equivalent model of the hybrid braking resistance converter branch is substituted into the whole network of VSC-HVDC system for solution. The electrical characteristics of the internal sub-module are inversely deduced, and then the solution is iterated. The consistency test and simulation time comparison between the equivalent model and the original model are carried out in PSCAD／EMTDC simulation software. The results show that the method can greatly reduce the simulation time, and highly simulate the external operation characteristics and the internal sub-module variation characteristics of hybrid braking resistance converter. © 2021 Electric Power Automation Equipment Editorial Department. All right reserved.
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页码：111 / 116and123
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