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基于谐波状态空间建模的变换器交直流谐波耦合特性分析
作者:
作者单位:

电力系统运行与控制山西省重点实验室(太原理工大学),山西省太原市 030024

作者简介:

王晋宁(1996—),男,硕士研究生,主要研究方向:微电网运行与控制。E-mail:jinningee@163.com
王磊(1985—),男,讲师,主要研究方向:电力电子变换器及其控制策略。E-mail:tywanglei1985@126.com
韩肖清(1964—),女,通信作者,教授,博士生导师,主要研究方向:电力系统运行与控制、微电网及新能源技术。E-mail:hanxiaoqing@tyut.edu.cn

通讯作者:

基金项目:

国家重点研发计划资助项目(2018YFB0904700);国家自然科学基金资助项目(U1610121);山西省科技重大专项资助项目(20181102028)。


Analysis on AC/DC Harmonic Coupling Characteristics of Converter Based on Harmonic State Space Modeling
Author:
Affiliation:

Shanxi Key Laboratory of Power System Operation and Control (Taiyuan University of Technology), Taiyuan 030024, China

Fund Project:

This work is supported by National Key R&D Program of China (No. 2018YFB0904700), National Natural Science Foundation of China (No. U1610121) and Major Science and Technology Projects of Shanxi Province (No. 20181102028).

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    摘要:

    基于谐波状态空间(HSS)理论对变换器进行建模,深入分析了变换器交直流谐波耦合特性。首先,通过数学推导,采用HSS理论对三相AC/DC变换器拓扑进行建模。HSS模型将交直流侧的各次谐波包括在内,反映了各频次谐波变量的作用关系。其次,通过该模型推导变换器的谐波传递函数,建立耦合阻抗图,分析交直流谐波耦合特性。该模型根据微电网中常用的电压源型三相AC/DC变换器建立,给出了变换器交直流谐波耦合阻抗的全局关系,可探究变换器两侧各个频次的谐波特性,并用于变换器并联、级联等结构的谐波分析。最后,在PLECS平台中搭建电压源型三相AC/DC变换器模型,与HSS模型计算结果进行对比,并通过实验验证了所提模型与谐波耦合特性分析的准确性。

    Abstract:

    A model of the AC/DC converter based on the harmonic state space (HSS) theory is developed, and the AC/DC harmonic coupling characteristics of the converter have been analyzed in depth. Firstly, through the mathematical derivation, the three-phase AC/DC converter is modeled based on the HSS theory. The HSS model includes each harmonic on the AC and DC sides, which reflects the relationship between the harmonic variables of each frequency. Secondly, the harmonic transfer function of the converter is deduced by the model, and the diagram of harmonic coupling impedance is established to analyze the AC/DC harmonic coupling characteristics. The model is built according to the voltage source three-phase AC/DC converter which is commonly used in microgrids. The full range of coupling characteristics between AC and DC side is illustrated, and can be used to explore the harmonic characteristics at all frequencies, and can also be applied in harmonic analysis of converter with parallel and cascaded structures. Finally, the simulation of the voltage source three-phase AC/DC converter is performed in PLECS, and it is compared with the HSS calculation results to verify the proposed model and the study of harmonic coupling characteristics. Furthermore, the proposed model and the conclusion of harmonic coupling characteristics are verified by experiments.

    图1 三相AC/DC变换器拓扑Fig.1 Topology of three-phase AC/DC converter
    图2 2种传递关系的对比示意图Fig.2 Schematic diagram of comparison betweentwo transfer relationships
    图3 耦合导纳分布图(-8~8次)Fig.3 Distribution of coupled admittance (-8th~8th)
    图4 耦合导纳幅值图(0~8次)Fig.4 Amplitude of coupled admittance (0~8th)
    图5 耦合导纳幅值受滤波电感值影响的变化图Fig.5 Variation diagram of coupled admittance amplitude affected by filter inductance
    图6 直流电压扰动作用下变换器交流电流幅值及频谱对比图Fig.6 Comparison of AC current amplitude and spectrum of converter with DC voltage disturbance
    图7 滤波电感值变化时的电流频谱Fig.7 Current spectrum with varied filter inductance
    图8 不同直流电压扰动作用下的变换器实验波形Fig.8 Experimental waveforms of converter with different DC voltage disturbances
    图 三相AC/DC变换器实验平台Fig. Prototype of three phase AC/DC converter
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引用本文

王晋宁,王磊,韩肖清,等.基于谐波状态空间建模的变换器交直流谐波耦合特性分析[J].电力系统自动化,2020,44(4):159-167. DOI:10.7500/AEPS20190409002.
WANG Jinning,WANG Lei,HAN Xiaoqing,et al.Analysis on AC/DC Harmonic Coupling Characteristics of Converter Based on Harmonic State Space Modeling[J].Automation of Electric Power Systems,2020,44(4):159-167. DOI:10.7500/AEPS20190409002.

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  • 收稿日期:2019-04-09
  • 最后修改日期:2019-07-06
  • 录用日期:2019-07-23
  • 在线发布日期: 2020-02-16
  • 出版日期: