Suppression control of harmonics by switching route connection in distribution systems

With recent currency of power electronics devices, the harmonic pollution in power system becomes serious problem. On the other hand, as recent utility power distribution system becomes broader and more complex, advanced harmonic measurement and analysis technologies are required. This paper presents the harmonic modeling based on the synchronized measurement system of harmonics at multi-points in wide area distribution system and the harmonic suppression method based on the route control in the network. The route control, which is based on the decentralized autonomous control theory, is achieved by switching the transmission route or inserting the phase modifier to change the harmonic flow in distribution system. The basic concept of this idea is represented by an example study.