Abstract This paper proposes a direct control strategy for voltage source grid connected inverter (VSI), based on the mathematic model of VSI on the stationary frame, to enhance the operation performance of VSI under the unbalanced and harmonic grid voltage. This strategy can implement two alternative control targets, i.e., stable output active and reactive power, as well as balanced and sinusoidal output current. The reduced order generalized integrator (ROGI) is applied to quickly decompose the positive sequence component of the grid voltage, further to calculate the power reference compensations. Vector proportional integrator (VPI) is used to control the power ripple components accrately. Finally, the experiment system of VSI is built to validate the proposed DPC strategy.
Shen Yongbo,Nian Heng. Stationary Frame Direct Power Control of Grid-Connected Inverter under Unbalanced and Harmonic Grid Voltage[J]. Transactions of China Electrotechnical Society, 2016, 31(4): 114-122.
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2016, Vol. 31 
