| 基于谐波线性化的模块化多电平换流器阻抗建模 |
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| 引用本文： | 吕敬,蔡旭. 基于谐波线性化的模块化多电平换流器阻抗建模[J]. 电力系统自动化, 2017, 41(4): 136-142 |
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| 作者姓名： | 吕敬 蔡旭 |
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| 作者单位： | 上海交通大学电子信息与电气工程学院风力发电研究中心, 上海市 200240,上海交通大学电子信息与电气工程学院风力发电研究中心, 上海市 200240 |
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| 基金项目： | 国家重点研发计划资助项目(2016YFB0900901);上海市科委科研计划资助项目(16DZ1203402) |
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| 摘 要： | 模块化多电平换流器(MMC)的小信号阻抗建模是分析含MMC的电力系统谐振及稳定性的关键。MMC是一个多频率、非线性、周期性时变的系统,具有复杂的内部动态特性,传统的小信号建模方法无法直接用于MMC。采用谐波线性化法对MMC的交流侧小信号阻抗进行建模,计及谐波环流和电容电压稳态纹波的影响,并揭示了环流控制对MMC交流侧阻抗的作用机理。利用MATLAB/Simulink搭建三相MMC详细时域仿真模型,仿真测量结果验证了解析模型的正确性。
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| 关 键 词： | 模块化多电平换流器 阻抗 谐振 环流 谐波线性化 |
| 收稿时间： | 2016-07-06 |
| 修稿时间： | 2016-12-02 |
Harmonic Linearization Based Impedance Modeling of Modular Multilevel Converters |
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| LYU Jing and CAI Xu. Harmonic Linearization Based Impedance Modeling of Modular Multilevel Converters[J]. Automation of Electric Power Systems, 2017, 41(4): 136-142 |
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| Authors: | LYU Jing and CAI Xu |
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| Affiliation: | Wind Power Research Center, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China and Wind Power Research Center, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China |
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| Abstract: | The small-signal impedance modeling of modular multilevel converters(MMCs)is the key for the resonance and stability analysis of MMC-based power systems. MMC is a converter system featuring multi-frequency, nonlinearity and periodically time-varying operation trajectory due to its complex internal dynamics. Hence, traditional small-signal methods cannot be directly applied to MMC. The AC-side small-signal impedance of MMC is modeled by the harmonic linearization method, which has taken into consideration the harmonic circulating current and capacitor voltage steady-state ripples. Furthermore, the influence of the circulating current control on the AC-side impedance of MMC is analyzed. A detailed time-domain simulation model of a three-phase MMC is built by using MATLAB/Simulink and the analytical models are validated by simulation results. This work is supported by National Key Research and Development Program of China(No. 2016YFB0900901). |
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| Keywords: | modular multilevel converter(MMC) impedance resonance circulating current harmonic linearization |
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