LCC-MMC混合直流输电系统直流侧谐波电流计算

ZHANG Zheren

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LCC-MMC混合直流输电系统直流侧谐波电流计算

更新时间：2025-08-13

- LCC-MMC混合直流输电系统直流侧谐波电流计算
- Automation of Electric Power Systems Vol. 38, Issue 23, Pages: 65-70(2014)
- 作者机构：
  
  浙江大学电气工程学院,浙江省,杭州市,310027
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- Published：2014
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ZHANG Zheren. [J]. Automation of electric power systems, 2014, 38(23): 65-70.
DOI：

ZHANG Zheren. [J]. Automation of electric power systems, 2014, 38(23): 65-70. DOI：

摘要

针对一种在整流侧和逆变侧分别采用电网换相型换流器和模块化多电平换流器（MMC）的混合直流输电系统，提出了直流侧谐波电流频率计算方法和完整流程。在整流侧采用三脉动谐波电压源，等效了12脉动换流器的谐波输出特性;在逆变侧使用电容串联电感的无源结构，作为MMC直流侧等效电路;线路参数计算中采用了全相非解耦模型的改进算法。与基于PSCAD/EMTDC搭建数字仿真模型进行直流侧谐波电流计算结果的比较，验证了提出方法的准确性。

Abstract

For a hybrid high-voltage direct current（HVDC）transmission system using the line commutated converter（LCC）at the rectifier side and the modular multilevel converter（MMC）at the inverter side，a calculation method and the complete process of harmonic current at the DC side are proposed.Firstly，the LCC at the rectifier side is replaced by the three-pulse harmonic voltage source，whose harmonic output characteristic is equivalent to a twelve-pulse converter.Secondly，the MMC is represented by a passive electric network，with an improved calculating method for the coupled line model introduced for calculating the admittance matrix of DC transmission lines.Finally，by comparing with harmonic current calculation results at the DC side of a digital simulation model based on PSCAD/EMTDC，the accuracy of the proposed method is verified.

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