modifying Sinewave inverter as 'on-grid' inverter

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zeeshan2029

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Hello

i have made transformer based pure sine wave inverter by generating spwm from microcontroller. so i am trying to make this simple inverter to work as 'on grid' inverter.
what changes are required.


regards
 

You need frequency synchronization and a feedback loop controlling the output voltage according to the Iload respectively Pload setpoint. Also protection circuits watching safety limits for output current and output voltage.
 
Thank you sir

can you explain in detail about the protection circuitry.
 

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