摘要
本文分析了非线性负载对电力推进船舶电网的危害,并对电力推进船舶上最大的非线性负载推进变频器谐波产生的机理和频谱特征进行研究。为了抑制电网侧谐波,减小谐波对电网上其他设备的影响,提出了相应的谐波抑制方案,对各种谐波抑制方案进行了对比。重点介绍了改变设备拓扑结构以及控制算法或者加装移相变压器的方法,并在MATLAB中建立了仿真模型,对多脉波整流的输入电流进行仿真。仿真结果显示采用整流器多重化的方法可以有效的减小整流器输入侧谐波,整流器的脉波数越多对谐波的抑制效果越明显。
The hazards of nonlinear loads on ship power grids is analyzed in this paper.It investigates the mechanism and spectral characteristics of harmonic generated from propulsion inverters,the largest nonlinear load on electric propulsion ships.In order to suppress grid side harmonics and reduce their impact on other equipment,corresponding harmonic suppression schemes are proposed and compared,with a focus on introducing methods such as changing equipment topology and control algorithms,or installing phase-shifting transformers.And a simulation model is established in MATLAB to simulate the input current of multiple pulse rectification.The simulation results show that the method of multiple rectifiers can effectively reduce the input side harmonics of the rectifier,and the more pulse numbers are in the rectifier,the more significant the suppression effect is on harmonics.
作者
刘保平
杨清华
Liu Baoping;Yang Qinghua(Beihai Rescue Bureau of the Ministry of Transport,Yantai 264000,Shandong,China;Qingdao Haixi Electric Co.,Ltd,Qingdao 266000,Shandong,China)
出处
《船电技术》
2024年第8期9-12,共4页
Marine Electric & Electronic Engineering
关键词
非线性负载
谐波抑制
整流器多重化
nonlinear load
harmonic suppression
multiplication of rectifiers
