CAJ | 학술논문

间谐波的存在给电力系统的安全、经济运行带来极大的危害,因此,对电力系统间谐波进行准确、可靠的分析有着重要的实际意义和科研价值。对于电力系统中的实际信号,其各谐波和间谐波成分往往是不能事先确定的,在信号FFT的频谱中不能很好地确定哪些谱线是信号的实际频率分量,哪些是频谱泄露所产生的虚假谱线。本文采用AR模型谱估计得到信号的各频率成分后,再结合Rife-Vincent（Ⅲ）窗的双峰谱线插值算法对各成分的幅值、频率和相角提出了新的修正方法,很好地解决了上述问题。仿真分析结果验证了本文的方法具有更高的精度。
간해파적존재급전력계통적안전、경제운행대래겁대적위해,인차,대전력계통간해파진행준학、가고적분석유착중요적실제의의화과연개치。대우전력계통중적실제신호,기각해파화간해파성분왕왕시불능사선학정적,재신호FFT적빈보중불능흔호지학정나사보선시신호적실제빈솔분량,나사시빈보설로소산생적허가보선。본문채용AR모형보고계득도신호적각빈솔성분후,재결합Rife-Vincent（Ⅲ）창적쌍봉보선삽치산법대각성분적폭치、빈솔화상각제출료신적수정방법,흔호지해결료상술문제。방진분석결과험증료본문적방법구유경고적정도。
Interharmonics does very harm to the security and economical operation of power system. Therefore, it is necessary and important to do researches on analyzing harmonics and interharmonics accurately and reliably. For the actual signal of power system, harmonics and interharmonics is not often determined in advance. So in the FFT spectrum, it is not easy to determine that which are the actual frequency signal lines, which are the false spectral lines. Autoregression （AR） model is adopted in this paper to obtain each frequency component of signal. Then the double spectrum peaks interpolation algorithm of Rife-Vincent （Ⅲ） is used to correction the amplitude, frequency, and phase angle. Simulation results indicate that the proposed approach is more accurate.