A Tuning Method of Selective Harmonic Voltage Compensator for Distributed Generators

In islanded micro-grid, the distributed generators are required to regulate the local grid voltage and frequency, especially when non-linear loads produce current harmonics inducing same frequencies voltage harmonics. In order to suppress the voltage harmonics, a selective harmonic compensator is always needed. For single phase distributed generator, a method based on single equivalent synchronous frame which is used to extract harmonics is modified as selective harmonic controller. Considering the lack of parameter tuning method for controller, based on the detailed analysis of the controller, a design procedure of controller parameters is proposed. Simulation and preliminary experiment prove the design approach.