Abstract

Power quality is analyzed for the poloidal field (PF) power supply system of the Experimental Advanced Superconducting Tokamak (EAST) device. It is found that the power quality is quite different when the four-quarter PF power system is working in different operation modes. The (6k±1)’th (k is the odd number) harmonics are dominant during the electricity-cost phase while the (6k±1)’th (k is the even number) harmonics exist abundantly during the electricity-generation stage. In addition, fast Fourier transform as the data analysis method is applied to process harmonics and interharmonics. The experimental results present the characteristics of waveform and of current and power, and they show the emission features of harmonics and interharmonics, which leads to the conclusion that the energy of interharmonics and spectrum leakage caused by the harmonic clustering algorithm is recovered to an integer or that the picket fence effect results in the spectrum leakage of interharmonics.

摘要

分析了实验高级超导托卡马克（EAST）设备的极向场（PF）电源系统的电能质量。研究发现，四分之四的PF电力系统在不同的运行模式下工作时，其电能质量会有很大差异。在电力成本阶段，第（6k±1）次（k为奇数）次谐波占主导，而在发电阶段，第（6k±1）次（k为偶数）次谐波盛行。此外，作为数据分析方法的快速傅里叶变换被应用于过程谐波和间谐波。实验结果展示了波形，电流和功率的特性，并展示了谐波和间谐波的发射特性，