CAJ | 학술논문

分析了馈能型交流电子负载谐波间谐波产生的机理，基于馈能型电子负载工作原理，对电子负载输出信号进行研究，得出输出信号含有谐波间谐波等多种成分。采用 MUSIC算法估计电力谐波信号频率，针对电力信号实值的特点，对 MUSIC算法进行相应改进，获得较高的检测精度，同时对比了 FFT 算法的频率估计结果，得出MUSIC对电力谐波信号尤其是间谐波等负载谐波具有更高的精度，对电力系统监测及电能质量评估有较大应用价值。
분석료궤능형교류전자부재해파간해파산생적궤리，기우궤능형전자부재공작원리，대전자부재수출신호진행연구，득출수출신호함유해파간해파등다충성분。채용 MUSIC산법고계전력해파신호빈솔，침대전력신호실치적특점，대 MUSIC산법진행상응개진，획득교고적검측정도，동시대비료 FFT 산법적빈솔고계결과，득출MUSIC대전력해파신호우기시간해파등부재해파구유경고적정도，대전력계통감측급전능질량평고유교대응용개치。
The harmonic/inter-harmonic production mechanism of energy-feedback AC electronic load is analyzed based on the working principle of energy-feedback electronic load.The electronic load output signal is studied,and it is found that the output signal contains harmonic/inter-harmonic and other components.By adopting the MUSIC,the frequency of power harmonic signal is estimated.According to the characteristic that the power signal is real,the MUSIC method is correspondingly improved and a high detection precision is achieved.Compared with the result of frequency estimation based on FFT algorithm,it is found that MUSIC has much higher accuracy with regard to detecting electrical harmonic signal,and the inter-harmonic in particular.This is of great applicable value to the monitoring of electrical power system and to the evaluation of energy power quality.