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多样性子模块混合型MMC统一外特性高效电磁暂态模型
作者:
作者单位:

1.中国电力科学研究院,北京市 100192;2.清华大学电机工程与应用电子技术系,北京市 100084

作者简介:

通讯作者:

基金项目:

国家电网公司总部科技项目(XT71-18-030)。


Unified Terminal and Highly Efficient Electromagnetic Transient Model of Hybrid Modular Multilevel Converter with Various Sub-modules
Author:
Affiliation:

1.China Electric Power Research Institute, Beijing 100192, China;2.Department of Electrical Engineering, Tsinghua University, Beijing 100084, China

Fund Project:

This work is supported by State Grid Corporation of China (No. XT71-18-030).

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    摘要:

    混合型模块化多电平换流器(MMC)的高效电磁暂态仿真是研究相关技术的重要基础。然而,由于多种子模块可以被采用,且每种子模块中均包含了大量的开关,混合型MMC的详细电磁暂态模型将严重降低其仿真效率。鉴于此,文中基于开关函数的定义与电容器件的动态特性,对多样性子模块的串联结构进行了统一的动态平均化等值,并根据等值后的动态模型,提出了一种适用于直流电网高效电磁暂态仿真的混合型MMC统一外特性模型以兼顾直流电网对仿真精度及效率的双重要求。同时,所提统一模型具有良好的可移植性以满足其作为研究工具的修改便利性要求。最后,基于ADPSS仿真软件,通过与基于分立元件的详细模型进行对比,验证了所提统一外特性模型的仿真精度与效率。

    Abstract:

    The highly efficient electromagnetic transient (EMT) simulation of hybrid modular multilevel converter (MMC) is an important basis for the related researches about hybrid MMC. However, because there are various kinds of sub-modules (SMs) can be employed, and a lot of power electronic switches are included in each kind of SMs, the detailed EMT model of hybrid MMC will reduce the simulation efficiency seriously. In view of this background, the unified dynamic averaging equivalent model of the series structure of the various SMs is proposed in this paper based on the switching function and the dynamic characteristic of capacitor. Besides, a unified terminal high efficiency EMT model of hybrid MMC based on the proposed dynamic model of the series structure is also presented and analyzed. The proposed unified model in this paper not only is convenient but also has the great simulation accuracy and efficiency, which has good portability and is especially important for a research tool to satisfied the convenience demand of modification. Finally, the simulation accuracy and efficiency of the proposed model are validated by the comparison with the detailed model based on the simulation components in ADPSS.

    表 1 多样性子模块串联结构的等效电压源类型参数Table 1 Type parameters of equivalent voltage source for series structure based on various sub-module
    表 3 多样性子模块外特性模型与详细模型仿真效率比较结果Table 3 Comparison results of simulation efficiency for detailed model and various sub-modules for terminal model
    表 4 Table 4
    表 2 外特性模型与详细模型仿真效率比较结果Table 2 Comparison results of simulation efficiency of terminal model and detailed model
    图1 混合型MMC及其多样性子模块拓扑结构Fig.1 Topology structure of hybrid MMC and itsvarious sub-modules
    图2 FBSM串联结构不同工作状态下的动态平均化模型Fig.2 Dynamic averaging model of FBSM with series structure for different working states
    图3 多样性子模块串联结构动态平均化统一模型Fig.3 Series structure of DAUM with various sub-modules
    图4 基于DAUM的混合型MMC统一外特性电磁暂态模型整体架构Fig.4 Whole architecture of unified terminal electromagnetic transient model for DAUM based hybrid MMC
    图5 混合型MMC稳态对比结果放大波形Fig.5 Large-time-scale waveforms of steady-state comparison results for hybrid MMC
    图6 混合型MMC端口(限流电抗器外侧)发生双极接地直流故障对比结果放大波形Fig.6 Large-time-scale waveforms of pole to pole grounded DC fault comparison results for hybrid MMC (outside of current limiting reactor)
    图 FBSM串联结构不同状态下的实际运行电路Fig. Practical operating circuits of series structure based on FBSM for different working states
    图 真双极四端直流电网拓扑Fig. Topology of the bipolar dc power network
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引用本文

李亚楼,孙谦浩,孟经伟,等.多样性子模块混合型MMC统一外特性高效电磁暂态模型[J].电力系统自动化. DOI:10.7500/AEPS20190715001.

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  • 收稿日期:2019-07-15
  • 最后修改日期:2020-01-15
  • 录用日期:2019-11-22
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