基于牛顿-蚁群算法与选择性谐波调制的电网功率放大器宽频控制策略  

A control strategy for grid power amplifier broadband based on Newton-Raphson ant colony algorithm and selective harmonic modulation

作　　者：代子阔 史可鉴 赵晨星 张天成 徐妍 汪诚 DAI Zikuo;SHI Kejian;ZHAO Chenxing;ZHANG Tiancheng;XU Yan;WANG Cheng(State Grid Liaoning Electric Power Co.,Ltd.,Shenyang 110006,China;State Grid Liaoning Electric Power Research Institute,Shenyang 110006,China;State Grid Tieling Power Supply Company,Tieling 112000,China;State Grid Fushun Power Supply Company,Fushun 113000,China;Nanjing University of Science and Technology,Nanjing 210000,China)

机构地区：[1]国网辽宁省电力有限公司,辽宁沈阳110006 [2]国网辽宁电力科学研究院,辽宁沈阳110006 [3]国网铁岭供电公司,辽宁铁岭112000 [4]国网辽宁省抚顺供电公司,辽宁抚顺113000 [5]南京理工大学,江苏南京210000

出　　处：《电力系统保护与控制》2024年第16期97-109,共13页Power System Protection and Control

基　　金：江苏省自然科学基金项目资助(BK20190461);国网辽宁省电力有限公司科技项目资助(2021YF-63)。

摘　　要：选择性谐波消除/生成脉宽调制技术能与多电平电力电子变换器相结合,实现低开关频率下的高频电网谐波功率复现。然而,为生成特定次谐波,需要求解非线性开关角方程,其求解精度受开关角初值选取约束,且实时性随着谐波次数的增加而降低。因此提出一种基于牛顿-蚁群算法的实时选择性谐波生成脉宽调制技术。通过建立开关角方程,利用蚁群算法求解初值,进一步结合牛顿算法获得不同开关频率及计算步长对应的最多谐波数目,并分析得到调制比-开关角对应关系。通过查找表获得初始开关角,并前馈至电压控制环路,实现对特定次谐波的无静差跟踪。最后以级联H桥多电平变换器为例,搭建仿真与实验平台,验证了理论分析的正确性与所提策略的可行性。Selective harmonic elimination/generation pulse width modulation technology can be combined with multilevel converters to achieve high-frequency grid harmonic power recurrence at a lower switching frequency.To generate a specific harmonic,it needs to solve nonlinear switching angle equations.However,the accuracy of the solutions is constrained by the initial value selection of switching angle.Also,the real-time performance is reduced with the increase of harmonic orders.Therefore,this paper proposes a selective harmonic generation pulse width modulation method based on the Newton-Raphson-ant-colony algorithm.First,it builds switching angle equations,utilizes ant-colony algorithm to calculate the initial values,and further combines the Newton-Raphson algorithm to get the maximum number of harmonics corresponding to different switching frequency and calculation time-step duration.The corresponding relation between modulation ratio and switching angle is analyzed and obtained.Then,by looking up the table to obtain the switching angle and feed-forward it to the voltage control loop,the non-static error tracking of specific harmonics is realized.Finally,taking H-bridge based cascaded multilevel converter as an example,the simulation and experiment platform is built.The correctness of the theoretical analysis and the feasibility of the proposed strategy are verified.

关 键 词：选择性电网谐波功率放大器 级联多电平逆变器 牛顿-蚁群算法 实时选择性谐波生成脉宽调制 

分 类 号：TM46[电气工程—电器] TN722.75[电子电信—电路与系统]