Abstract
Recently, qualitative decline in electric power due to harmonic effect is causing trouble in the electric power system. Further, faults due to condensive capacitor series reactor bum are causing problems. Thus, a positive harmonic countermeasure is expected by both consumers and suppliers of electric power.
This thesis proposes a new harmonic countermeasure in the electric power system of the large consumer with harmonic occurrence source load leading to extra-high tension receipt of initial power. That is, it is the proposal of a harmonic restraint system that combines a voltage detection system series active filter with the current detection system shunt active filter. The authors carried out theory analysis and simulation by numerical value example. Consequently, this is being reported because of positive effectiveness. With a shunt active filter and series active filter used together, the series active filter compensates harmonic voltage on the load side. It then becomes possible to use a current detection system shunt active filter for the harmonic occurrence source load containing the above system's capacitive load. Furthermore, using this system, inflow of the current harmonics to the capacitive load can be restrained by harmonic expansion phenomenon and anti-resonance phenomena. This proposal is related to the system employing a series active filter together with a shunt active filter. The authors are reporting this thesis because the above system was considered in detail and hasn't been published as far as they know.
