单相电路谐波电流检测的一种参考方法的仿真研究  

Simulation Research on A Referenced Method for Harmonic Current Detection of Single-Phase Circuit

作　　者：李自成[1] 孙玉坤[1] 刘国海[1] 李凤祥[1] 杨建宁[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：《低压电器》2008年第17期30-33,共4页Low Voltage Apparatus

基　　金：江苏省高校研究生科技创新计划项目资助(1221140004);江苏省高新技术项目资助(GB2004024)

摘　　要：提出了基于三相电路瞬时无功理论的单相电路谐波电流检测方法(参考方法)的仿真研究。根据该参考方法建立了Matlab仿真模型,确定了低通滤波器的类型、阶数和截止频率。在电源电压无畸变、发生畸变和频率变化情况下,对该参考方法检测精度进行了仿真研究。研究结果表明,以上3种情况对该参考方法检测精度基本无影响,但在电源电压无畸变且负载电流变化时存在过跟踪。Simulation research on method for harmonic, current detection of single-phase circuit based on instantaneous reactive power theory of three-phase circuit（referenced method） was presented. The Matlab simulation model was built and the type, order-number and cut-off frequency of low pass filter were confirmed according to this referenced method. In the case of power supply voltage having no distortion, distortion and frequency variation, the simulation research of detection precision of this referenced method was done. Research result shows that there is no influence on detection precision of this referenced method basically under above three cases, but excessive track exists when power supply voltage has no distortion and load current is variational.

关 键 词：有源电力滤波器 谐波电流 瞬时无功功率理论 低通滤波器 

分 类 号：TM714[电气工程—电力系统及自动化]