CAJ | 학술논문

滤波器在电力系统中具有举足轻重的作用,为保证滤波器的安全稳定运行,应对滤波器进行有效的监测.本文在分析了滤波器的功能、结构以及谐波电流特点的基础上,提出了新的指标:谐波电流差值变化率,用于滤波器故障在线监测. 运用支持向量机( SVM)进行故障分类,通过对不同核函数的分类效果的比较,确定了最优的核函数. 通过对双调谐滤波器各元件发生故障时进行仿真,验证了该指标的有效性和SVM分类的准确性,从而说明了本文所提出的在线监测方法的有效性,对实际工程具有一定的价值.
려파기재전력계통중구유거족경중적작용,위보증려파기적안전은정운행,응대려파기진행유효적감측.본문재분석료려파기적공능、결구이급해파전류특점적기출상,제출료신적지표:해파전류차치변화솔,용우려파기고장재선감측. 운용지지향량궤( SVM)진행고장분류,통과대불동핵함수적분류효과적비교,학정료최우적핵함수. 통과대쌍조해려파기각원건발생고장시진행방진,험증료해지표적유효성화SVM분류적준학성,종이설명료본문소제출적재선감측방법적유효성,대실제공정구유일정적개치.
Filter has a decisive role in the power system.In order to ensure the safe and stable operation of the filter, effective monitoring is necessary.Based on the analysis of the function, structure and characteristics of harmonic cur-rents of the filter, the changing rate of harmonic current differences is put forward to monitor filter fault on-line in this paper.The support vector machine ( SVM) is used for classifying fault.By comparing the classification results of different kernel functions, the optimal kernel function is determined.Through simulations of each component's failure of the double tuned filter, the validity of the index and accuracy of SVM are verified.The validity of the proposed on-line monitoring is proved.The index has a certain value for actual projects.