实现同相补偿的三相变流器输出滤波器LCL参数设计  

Parameter design of three-phase converter LCL output filter for co-phase power supply compensation

作　　者：姜兴宇 王果[1] Jiang Xingyu;Wang Guo(School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China)

机构地区：[1]兰州交通大学自动化与电气工程学院,兰州730070

出　　处：《电测与仪表》2019年第8期81-87,107,共8页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51767013);甘肃省教育厅自然科学基金(2017A-020);中国铁路总公司科技研究开发计划(2017J012-A);甘肃省科技计划资助(17JR5RA083)

摘　　要：针对同相供电系统中存在高次谐波问题,提出以电网侧电流谐波畸变率(Total Harmonic Distortion,THD)最小为目标的输出滤波器LCL参数设计方法。首先从机车电流、网侧电感、同相补偿装置(Co-phase Compensation Device,CPD)输出电流整体角度出发,推导电网侧谐波畸变率THD和CPD谐波衰减比RAF (Ripple Attenuation Factor)与网侧电感、LCL电容、LCL总电感、LCL总电感分配比之间的关系。其次以CPD补偿电流满足快速跟踪性、开关纹波电流满足抑制要求、LCL基波无功损耗满足限制条件来确定参数取值范围。THD最小为目标函数,RAF为约束,应用分割矩形算法(Dividing Rectangle Algorithm,DIRECT)进行求解,得到THD值最小时LCL滤波器的参数值。最后利用MATLAB/simulink仿真验证参数设计的正确性。In order to solve the problem of high frequency harmonics in the co-phase power supply system, an output filter LCL parameter design method aiming at the minimum THD (total harmonics distortion, THD) of grid side current is proposed in this paper. Firstly, from the overall perspective of locomotive current, grid side inductance, and the output current from co-phase compensation device (CPD),this paper deduces the relationship among THD of grid side current and RAF (ripple attenuation factor,RAF) of CPD,the grid side inductance,the capacitance of LCL,the total inductance of LCL,and the total inductance distribution ratio of LCL. Then,the range of parameter value is determined by making CPD compensation current meet fast tracking ability,switching ripple current meet the inhibition requirement,and LCL fundamental reactive power loss meet the restriction conditions.The minimum THD is the objective function and RAF is the constraint.The dividing rectangle algorithm is applied to solve the problem and find the parameter value of LCL with the minimum THD. Finally, the accuracy of the parameter design is verified by MATLAB/simulink.

关 键 词：CPD 输出滤波器 LCL 参数设计 

分 类 号：TM93[电气工程—电力电子与电力传动] U233.6[交通运输工程—道路与铁道工程]