Dual Operation Mode Of A Transformer Less H-bridge Inverter In Low-voltage Microgrid

Dual Operation Mode Of A Transformer Less H-Bridge Inverter In Low-Voltage Microgrid

Abstract:

In this project a new control strategy has been developed to initiate and activate the H-bridge inverter to control the power flow at PCC. It presents the bilateral operation of a transformer-less H-bridge inverter as a power flow controller and fault current limiter in low-voltage distribution network.  On the other hand, the H-bridge inverter operation like a short circuit current limiter during grid disturbance event and its smooth reinsertion after fault clearance have also been clarified. Besides, an island mode control strategy incorporating synchronization controller, and proper coordination with flip flops have been implemented in order to synchronize the micro-grid with the main grid before reclosing the circuit breaker