In this paper, an efficient approximated method based upon the method of auxiliary sources （MAS） is proposed to solve the two-dimensional scattering problem of large, infinite dielectric cylinder. To reduce the size...In this paper, an efficient approximated method based upon the method of auxiliary sources （MAS） is proposed to solve the two-dimensional scattering problem of large, infinite dielectric cylinder. To reduce the size of the total computational cost, the formulation of the MAS is modified by minimizing the number of auxiliary sources considered to implement the solution. It is shown that the standard formulation of the method of auxiliary sources, based on placing a finite number of auxiliary sources in an interior cylinder and the same number in the exterior cylinder surrounding the physical boundary, can be replaced by a finite number of strips placed on the same interior and exterior cylinder. These strips, containing auxiliary sources, are separated by a constant angle. Thus, compared with the standard MAS, the number of auxiliary sources of the new approximated method is reduced; also the proposed method can greatly reduce the computational complexity and the memory requirement. The numerical results obtained in this paper reveal the validity of the proposed approximated method.展开更多
结合某600 MW机组高压厂用变压器出厂试验数据,以及6 k V母线所接异步电动机参数,分别应用等效电压源法和传统方法,计算6 k V母线三相短路电流初始值,并对两种计算结果进行比较,计算中假定高压厂用变压器高压侧馈电网络阻抗为零。应用...结合某600 MW机组高压厂用变压器出厂试验数据,以及6 k V母线所接异步电动机参数,分别应用等效电压源法和传统方法,计算6 k V母线三相短路电流初始值,并对两种计算结果进行比较,计算中假定高压厂用变压器高压侧馈电网络阻抗为零。应用等效电压源法计算由厂用电源支路提供的短路电流,其平均值与采用传统方法的计算结果非常接近。展开更多
文摘In this paper, an efficient approximated method based upon the method of auxiliary sources （MAS） is proposed to solve the two-dimensional scattering problem of large, infinite dielectric cylinder. To reduce the size of the total computational cost, the formulation of the MAS is modified by minimizing the number of auxiliary sources considered to implement the solution. It is shown that the standard formulation of the method of auxiliary sources, based on placing a finite number of auxiliary sources in an interior cylinder and the same number in the exterior cylinder surrounding the physical boundary, can be replaced by a finite number of strips placed on the same interior and exterior cylinder. These strips, containing auxiliary sources, are separated by a constant angle. Thus, compared with the standard MAS, the number of auxiliary sources of the new approximated method is reduced; also the proposed method can greatly reduce the computational complexity and the memory requirement. The numerical results obtained in this paper reveal the validity of the proposed approximated method.
文摘结合某600 MW机组高压厂用变压器出厂试验数据,以及6 k V母线所接异步电动机参数,分别应用等效电压源法和传统方法,计算6 k V母线三相短路电流初始值,并对两种计算结果进行比较,计算中假定高压厂用变压器高压侧馈电网络阻抗为零。应用等效电压源法计算由厂用电源支路提供的短路电流,其平均值与采用传统方法的计算结果非常接近。
