Study on Modeling of DC Side Harmonic Equivalent Circuit of MMC for Medium Voltage Application Scenario

FENG Junjie; ZHOU Shijia; CHEN Fuqiang; ZOU Changyue; YANG Shuangfei; ZHAO Xiaobin; FU Chuang

doi:10.14044/j.1674-1757.pcrpc.2021.05.022

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Study on Modeling of DC Side Harmonic Equivalent Circuit of MMC for Medium Voltage Application Scenario

更新时间：2024-09-14

- Study on Modeling of DC Side Harmonic Equivalent Circuit of MMC for Medium Voltage Application Scenario
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 42, Issue 5, Pages: 136-142(2021)
- 作者机构：
  
  直流输电技术国家重点实验室(南方电网科学研究院有限责任公司)
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2021.05.022
  CLC： TM46;TM721.1
- Published：2021，
- 稿件说明：
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FENG JUNJIE, ZHOU SHIJIA, CHEN FUQIANG, et al. Study on Modeling of DC Side Harmonic Equivalent Circuit of MMC for Medium Voltage Application Scenario. [J]. Power capacitor & reactive power compensation, 2021, 42(5): 136-142.
DOI：

FENG JUNJIE, ZHOU SHIJIA, CHEN FUQIANG, et al. Study on Modeling of DC Side Harmonic Equivalent Circuit of MMC for Medium Voltage Application Scenario. [J]. Power capacitor & reactive power compensation, 2021, 42(5): 136-142. DOI： 10.14044/j.1674-1757.pcrpc.2021.05.022.

摘要

本文首先建立了模块化多电平换流器(modular multilevel converter

MMC)的时域平均模型。接着

为获取中压应用场景下MMC平均开关函数的谐波特性

建立了平均开关函数的动态相量模型。基于MMC的时域平均模型和平均开关函数动态相量模型

推导得到MMC的直流侧谐波等值电路。等值电路由直流侧等效谐波电流源和等效谐波阻抗组成

其中等效谐波电流源不仅能反映MMC交流侧谐波电流对直流侧谐波电流的传递作用

还能反映直流侧特征谐波电流特性。最后

基于Matlab/Simulink仿真模型验证了MMC直流侧等值电路的正确性。

Abstract

In this paper

the time-domain average model of modular multilevel converter（MMC）is firstly set up. Then

the dynamic phasor model of the average switching function is set up in order to obtain the harmonic characteristics of the MMC average switching function in the medium voltage application scenario.The DC-side harmonic equivalent circuit of MMC is derived on the basis of MMC’s time-domain average model and the average switching function dynamic phasor model. The equivalent circuit is composed of equivalent harmonic current source and equivalent harmonic impedance of at the DC side

where the former can not only reflect the transmission effect of the harmonic current at AC side to the harmonic current at DC side

but also reflect the characteristic harmonic current characteristics at DC side. Finally

the correctness of the equivalent circuit at DC side of MMC is verified based on the Matlab/Simulink simulation model.

关键词

MMC开关函数等值电路谐波阻抗谐波特性

Keywords

MMCswitching functionequivalent circuitharmonic impedanceharmonic characteristics

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