串联型可控饱和电抗器谐波特性分析  

Harmonic characteristic analysis of serial controllable saturated reactor

作　　者：牟宪民[1] 魏晓霞[1] 纪延超[1] 胡泰[2] 

机构地区：[1]哈尔滨工业大学电气工程及自动化学院,黑龙江哈尔滨150001 [2]广东电网公司江门鹤山供电局,广东鹤山529700

出　　处：《电力自动化设备》2007年第3期14-17,共4页Electric Power Automation Equipment

摘　　要：可控饱和电抗器在动态无功补偿、电机软启动、小电流接地选线等方面具有广阔的应用前景。针对电工硅钢片的特点,将基本磁化曲线简化为2条具有不同斜率的折线。采用傅里叶级数的分析方法对串联型可控饱和电抗器的谐波特性进行详细分析,获得了其电流谐波特性。通过定义饱和度的概念,推导出了可控饱和电抗器输出电流傅氏系数及总谐波畸变率同饱和度之间的关系。利用Matlab软件建立仿真模型,仿真结果验证了理论分析的正确性。最后,对串联型可控饱和电抗器谐波抑制的途径进行了探讨。Controllable saturated reactor is widely used in dynamic reactive power compensation, induction motor soft- starting and fault line selection of small current grounding system. The magnetizing curve of silicon steel sheet approximated as a two- section line and the harmonic characteristics of serial controllable saturated reactor are analyzed in detail using Fourier series method. With the definition of saturation degree,the expression of Fourier coefficient and the relationship between THD（Total Harmonic Distortion） and magnetic saturation degree are derived. Simulation with Matlab/Simulink proves the validity of this theoretical analysis. Feasible methods to eliminate harmonics are discussed.

关 键 词：可控饱和电抗器 磁化曲线 分段映射 无功补偿 谐波分析 

分 类 号：TM761[电气工程—电力系统及自动化]