Modular Switched Capacitor Application in Low Capacitance Static Compensator

摘要

A low capacitance cascaded H-bridge static compensator (StatCom) with additional switches on the dc-side is presented in this paper. The switching capability of the dc capacitors provides opportunities for choosing optimal semiconductor technologies by distributing the losses between the dc-side switches and the main H-bridge switches. Having additional switches on the dc-side helps to easily modularize the capacitors and control the ripple on the capacitors voltages. Simulation study on an 8.5-MVA StatCom system is used to confirm the viability of using modular switched capacitors in the low capacitance cascaded H-bridge StatCom systems.