The special design considerations for series hybrid active power filter

Some important factors of a series hybrid active power filter are presented in this paper for the case when the load is varied in a wide range and/or the source voltage is seriously distorted. Special designs of passive filters, adaptive control of parameter and multi variant control are discussed in detail. The filter is stable, has good performance, and causes small, capacitive reactive current. The simulation and experimental results accorded with the theoretical analysis results.