Ship & Boat ›› 2019, Vol. 30 ›› Issue (06): 145-152.DOI: 10.19423/j.cnki.31-1561/u.2019.06.145

Previous Articles    

Research on Harmonic Suppression Strategy of Grid Impedance Adaptive Marine Grid-tied Inverter

LIU Yuan, CHEN Tao, FU Xiao-hong, XIA Jun   

  1. Marine Design & Research Institute of China, Shanghai 200011, China
  • Received:2019-07-08 Revised:2019-10-20 Online:2019-12-25 Published:2020-03-07

电网阻抗适应型船舶并网逆变器谐波抑制策略研究

刘渊, 陈涛, 傅晓红, 夏骏   

  1. 中国船舶及海洋工程设计研究院 上海200011
  • 作者简介:刘 渊（1990-）,男,硕士,工程师。研究方向：绿色船舶应用技术方面的研究。陈 涛（1983-）,男,本科,工程师。研究方向：船舶电力系统及自动化控制研究。傅晓红（1979-）,女,硕士,研究员。研究方向：船舶电力系统及自动化控制、绿色船舶应用技术等方面研究。夏 骏（1990-）,男,本科,工程师。研究方向：船舶电力系统及自动化控制研究。

Abstract: The development of new energy has attracted the attention of all countries in the world. The grid-tied inverters connect the new energy resources and the power grid. LCL filter is used to suppress PWM harmonics caused by the inverter pulse width modulation. The zero impedance characteristics of LCL filter at the resonant frequency will cause the system resonance which endangers the stability of the system. Firstly, the paper analyzes the variation of the equivalent impedance of the ship multi-inverter parallel system, which drifts the LCL filter resonant frequency. Secondly, a harmonic suppression strategy for the shipboard grid-connected inverters is proposed, which can ensure the stability and effectiveness of the harmonic suppression of the single-phase LCL-filter-based grid-tied inverters system. At last, simulations based on PSIM 9.0 have been presented to verify the effectiveness of the proposed method.

Key words: grid-tied inverter, LCL filter, the equivalent grid impedance, harmonic suppression

摘要： 新能源的开发引起世界各国的重视,新能源通过并网逆变器将电能传递至电网。LCL滤波器近年来被越来越多用于抑制并网逆变器PWM谐波。LCL滤波器在谐振频率处的零阻抗特性会引起系统谐振,危害系统的稳定性。该文首先分析了船舶多逆变器并联系统等效电网阻抗的变化,以及等效阻抗变化时LCL滤波器谐振峰的偏移;进而提出了一种电网阻抗适应型船舶并网逆变器谐波抑制策略,该策略能保证基于LCL滤波器的单相并网逆变器系统的稳定性及谐波抑制的有效性;最后在PSIM仿真软件中搭建仿真平台,验证所提方法的有效性。

关键词: 并网逆变器, LCL滤波器, 电网等效阻抗, 谐波抑制

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