Multiple Module Quasi Resonant Boost Converter

Renewable energy sources, such as offshore wind farms, require high voltage gains in order to interface with power transmission networks. Previously, these conversions are normally made using bulky, complex, and costly transformers and high-voltage ac?dc converters with unnecessary bidirectional power flow capability. In order to avoid the use of huge transformers with large turns ratio, multiple modules of single-switch single-inductor dc?dc converters was proposed. It can reach high gain without transformers but results in high switching loss. To overcome this, a new approach for high-gain high-voltage dc-dc converters using quasi resonant boost converters is proposed. This approach reduces the switching losses associated with the semiconductor devices and increases the reliability during transmission.