| Title |
An Analysis and Optimum Design of a Neutral Line Harmonics Eliminating Reactor |
| Authors |
Pan-Seok Shin ; Gyo-Bum Chung ; Han-Deul Kim ; Cheol Kim |
| Keywords |
NHER ; Harmonics ; Zig-zag transformer ; Finite Element Method ; Sensitivity algorithm |
| Abstract |
In the modern power distribution systems, there are lots of zero-phase current harmonics in the neutral power line due to much usages of the controlled switching devices, various semiconductor power converting systems, OA(Office Automation) equipments, PC etc. In order to minimize the current harmonics a zero-phase neutral line current eliminating reactor (NHER) is designed and analyzed its performance using the finite element program. For the design of NHER, a program is developed using C++ program. To verify the program a case model(380/220[V], 200[A]) is designed and analyzed by the developed program. As the results of the optimal design, the core loss is reduced by 26[%] with eliminating of the current harmonics. Especially the ninth harmonics is much reduced as compared with the others. When the design of NHER is adapted to the load of the power system, the eliminating effect and efficiency of the device will be much better |