谐波注入脉宽调制的有源电力滤波器  

An active power filter with harmonic injection and pulse width modulation

作　　者：胥良 崔兆一 Xu Liang;Cui Zhaoyi(School of Electrical&Control Engineering,Heilongjiang University of Scienc&Technology,Harbin 150022,China)

机构地区：[1]黑龙江科技大学电气与控制工程学院,哈尔滨150022

出　　处：《黑龙江科技大学学报》2023年第6期896-901,共6页Journal of Heilongjiang University of Science And Technology

摘　　要：针对有源电力滤波器空间矢量脉宽调制中坐标变换与矢量调节切换等过程的复杂问题,提出一种谐波注入优化脉宽调制策略。通过建立有源电力滤波器的电路模型,运用内环PI实现电流解耦控制,改进ip-iq法对负载电流采样,分析鞍形调制波的傅里叶展开式,由调制因子求解调制函数及其正弦级数,通过调制指数建立关系,仿真并验证谐波注入脉宽调制的有源电力滤波器作用效果。结果表明,调制指数为0.5时系统可达到理想状态,输入侧电流谐波含量小于5%,功率因数提高,负载突变后仍保持系统稳定。The paper is an attempt to address the complex process problem of coordinate transformation and vector regulation switching in the space vector pulse width modulation of active power filter,and proposes a strategy of optimized PWM with harmonic wave.The study is accomplished by establishing circuit model of active power filter;introducing current inner loop PI to realize current decoupling control;improving i p-i q method to sample the load current;analyzing fourier expansion of saddle modulated wave;solving modulation function and its sinusoidal series by modulation factor and establishing mathematical relationship between the two factors by modulation index;and simulating and verifying the effect of active power filter with harmonic injection pulse width modulation.The results show that the system can reach ideal state with modulation index by 0.5,harmonic content of input current is reduced to less than 5%,power factor is improved.and system remains stable when load changes abruptly.

关 键 词：调制函数 调制因子 鞍形调制波 有源电力滤波器 

分 类 号：TN713[电子电信—电路与系统] TM761[电气工程—电力系统及自动化]