A study on the capacity of shunt hybrid active power filter

To implement the application of APF in high voltage system with a limited capacity, improved strategies are proposed in this paper. FSRC is the new circuit structure that the APF connected to the grid which effectively reduces the voltage of APF; At the same time, the proposed frequency dividing detection method can effectively reduce the calculation current in capacity. After the theoretical analysis, on the basis of meeting the requirements of harmonic suppression, these strategies can effectively improve the application of smaller capacity APF in high voltage systems, and the fast and efficient control measures is another tend to realize the improved application.