CAJ | 학술논문

针对谐波接地系统故障线路零序导纳特征不突出这一问题，提出了一种基于EMD的谐振接地系统选线新方法。该方法对各条线路的零序导纳进行EMD分解，提取出特征分量，通过比较故障线路和非故障线路特征分量的符号进行选线。大量仿真表明，该方法不受接地电阻和初始故障角的影响，能准确地选出故障线路。
침대해파접지계통고장선로령서도납특정불돌출저일문제，제출료일충기우EMD적해진접지계통선선신방법。해방법대각조선로적령서도납진행EMD분해，제취출특정분량，통과비교고장선로화비고장선로특정분량적부호진행선선。대량방진표명，해방법불수접지전조화초시고장각적영향，능준학지선출고장선로。
To solve this problem that harmonic grounding system fault line zero sequence admittance levy does not highlight, this paper proposes a new resonant grounding line selection method based on EMD. In this method, each line zero sequence admittance is decomposed with EMD, characteristic component is extracted, and the fault line is selected by comparing the characteristic component symbols of the fault line and non-fault lines. Extensive simulations show that this method is not impacted by the ground fault resistance and the initial angle, and can accurately select the fault line. This work is supported by National Natural Science Foundation of China (No. 61305080).