电力系统分数次谐波的产生机理、危害与特征  

Representative Characteristics,Emergence Mechanism and Their Harms for Fraction-harmonics

作　　者：杨帆[1] 李晓明[1] 郑秀玉[1] 舒欣[1] 

机构地区：[1]武汉大学电气工程学院,武汉430072

出　　处：《高电压技术》2007年第12期153-156,共4页High Voltage Engineering

摘　　要：为了了解、研究分数次谐波对电力系统安全稳定运行产生的危害及其机理,以变频调速装置和快速变化的波动负荷2种典型的非线性负荷分数次谐波源为例,分析了分数次谐波的产生机理及分数次谐波的危害。同时,应用MATLAB进行了数字仿真,通过对含有不同分数次谐波的波形分析,给出了分数次谐波具有周期大于工频周期,且为工频周期整数倍的典型特征。该典型特征可作为检测是否存在分数次谐波的依据。The mechanism of fraction-harmonics appearance is analyzed through the example of inverter speed equipment and fluctuation load of two typical fraction-harmonic sources,and the harm of fraction-harmonics is analyzed in detail through some typical examples.It suggests that fraction-harmonics,same as the integer harmonics,have serious impacts on the electrical devices.Then the wave which including different fraction-harmonics is analyzed through the mathematical simulation by the software MATLAB.The representative characteristics of fraction-harmonics are presented.It is revealed that the cycle of the wave including fraction-harmonics is longer than the base cycle.According to the characteristic,fraction-harmonics can be found if they exist.

关 键 词：分数次谐波 电力系统谐波 谐波源 检测方法 机理 典型特征 

分 类 号：TM711[电气工程—电力系统及自动化]