直接计算法在有源电力滤波器中应用的仿真研究  

Simulative research of direct computation method applied in APF

作　　者：李自成[1] 孙玉坤[1] 刘国海[1] 杨建宁[1] 黄永红[1] 

机构地区：[1]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《电力自动化设备》2008年第8期106-109,共4页Electric Power Automation Equipment

基　　金：江苏大学高级人才专项基金资助项目(1283000064);江苏省高校研究生科技创新计划项目(1221140004)~~

摘　　要：根据直接计算法的计算公式,提出了直接计算法的谐波电流检测框图;根据此谐波电流检测框图,利用Matlab的Simulink模块库,建立了直接计算法的Matlab仿真模型。仿真研究发现:若电源电压无畸变,当负载电流处于稳定状态时,直接计算法能够准确地计算出需要补偿的谐波及无功电流,当负载电流处于变化状态时,直接计算法具有较好的动态性能;电源电压畸变对直接计算法的检测精度的影响较大;电源频率变化对直接计算法检测精度的影响很小。当电源电压发生畸变时,可以采用锁相环电路获得与电源电压同步的正弦信号。The block diagram of harmonic current detection based on the computation formula of direct computation method is put forward,according to which the simulative model is built with Simulink module library of Matlab. Simulative research shows：the harmonic and reactive currents to be compensated can be accurately calculated by the direct computation method when load current is stable and there is no power supply voltage distortion;the direct computation method has better dynamic performance when load current is varying; the power supply voltage distortion has comparatively big influence on detection precision;and the power supply frequency has little influence on detection precision. When there is power supply voltage distortion,the sinusoidal signal in synch with power supply voltage can be obtained by phase-locked-loop circuit.

关 键 词：有源电力滤波器 仿真研究 谐波电流 直接计算法 

分 类 号：TN713[电子电信—电路与系统]