Half- and Full-Bridge Modular Multilevel Converter Models for Simulations of Full-Scale HVDC Links and Multiterminal DC Grids
Half- and Full-Bridge Modular Multilevel Converter Models for Simulations of Full-Scale HVDC Links and Multiterminal DC Grids
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DOI：
10.1109/jestpe.2014.2315833
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发表时间：
2014-04
影响因子：
5.5
通讯作者：
G. Adam;B. Williams
中科院分区：
文献类型：
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作者：
G. Adam;B. Williams
提出了一种改进的半桥和全桥模块化多电平换流器（MMC）电磁暂态（EMT）仿真模型，可用于多电平高压直流（HVDC）输电系统的全尺寸仿真，所提出的模型在其EMT部分内采用最小的软件开销，以正确地表示当转换器开关器件都被封锁了所提出的模型的有效性和可扩展性证明使用开环仿真的半桥和全桥MMC，和闭环仿真的全尺寸的HVDC链路，与201个细胞每臂配备基本的HVDC控制器，包括用于抑制二次谐波电流的转换器臂。从这两个演示所获得的结果表明，所提出的模型能够准确地模拟MMC在正常，交流和直流网络故障的典型行为。
This paper presents an improved electromagnetic transient (EMT) simulation model for the half- and full-bridge modular multilevel converters (MMCs) that can be used for full-scale simulation of multilevel high-voltage dc (HVDC) transmission systems, with hundreds of cells per arm. The presented models employ minimum software overhead within their EMT parts to correctly represent MMCs behavior during dc network faults when converter switching devices are blocked. The validity and scalabilities of the presented models are demonstrated using open-loop simulations of the half- and full-bridge MMCs, and closed-loop simulation of a full-scale HVDC link, with 201 cells per arm that equipped with basic HVDC controllers, including that for suppression of the second harmonic currents in the converter arms. The results obtained from both demonstrations have shown that the presented models are able to accurately simulate the typical behavior of the MMC during normal, and ac and dc network faults.