CAJ | 학술논문

根据函数逼近原理,输电线路的电报方程可以整理为一组正交基的线性组合.文章采用Daubechies正交基,经过投影变换,映像到与依赖于时间变量的和建立在确定架构的函数空间,与输电线路的电压和电流相关的微分方程被转换为代数矢量方程.从而,建立起每一单元的投影等效模型,然后可以在投映域中对输电系统的暂态进行计算.利用EMTP仿真验证了所建议的方法.
근거함수핍근원리,수전선로적전보방정가이정리위일조정교기적선성조합.문장채용Daubechies정교기,경과투영변환,영상도여의뢰우시간변량적화건립재학정가구적함수공간,여수전선로적전압화전류상관적미분방정피전환위대수시량방정.종이,건립기매일단원적투영등효모형,연후가이재투영역중대수전계통적잠태진행계산.이용EMTP방진험증료소건의적방법.
According to the approach criterion, the telegraph equation of transmission lines can be approximated with the linear combination of a certain set of orthogonal basis, for example, the set of the Daubechies wavelet. With projection to the Daubechies basis, a function space relates to time variable over a given resolution is mapped, and the differential equations related to the voltage and current of transmission line are transformed to algebraic vector equations. As a result the projected equivalent models of each unit can be obtained. Then, the transients of the transmission system can be computed in the projection domain. The proposed method is validated with EMTP simulation tests.