Two T-shaped three-level power sharing VSG controls PV-battery（DC source）/matlab simulink

Improvement of Three level Dual machine Parallel VSG Power Sharing and Voltage Balance Control Strategy[2] Control description:(1) Introducing the integral improvement method to eliminate the unequal distribution of active and reactive power caused by unequal line impedance in reactive power loops(2) Mid point potential balance: When VSG is applied to T-type three-level systems, there may be an imbalance in the input capacitance. The addition of the midpoint potential balance strategy in the literature can significantly improve it, and the balance effect is superior in simulation(3) Quasi PR controller: Using PR controller instead of traditional PI controller can achieve good response speed when the system is loaded with impulsive loads, ensuring good dynamic stability of the system
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