Development of a Parallel Hybrid Power Filter with Respective Harmonic Compensation Method

In this paper, the development of a practical parallel hybrid power filter consisting of a shunt active power filter and two passive filters is presented. The characteristic of the proposed hybrid power filter is analyzed in detail. The cooperation between the active power filter and passive filters is very important for reducing the power rating of the active part. So a novel control strategy is introduced to separate the compensation frequency bands of active and passive filters. 250 kVA hybrid filter device has been developed for compensating large power rating rectifier. Finally, the simulation and experimental results are presented to demonstrate the good performance of the proposed system, and validate that this control strategy can reduce the power rating of active part effectively for large capacity nonlinear load.