Novel control approach for enhancing multi-performance of two-stage converter during power transfer from solar photo-voltaic array to AC grid

摘要: Abstract This paper presents a nonconventional control approach for augmenting various performances of two-stage power converter (DC-side boost and three-phase voltage source inverter (VSI)) during transfer from solar photo-voltaic array to AC grid. In the application, intermediate DC link is traditionally regulated settle at constant high value. fixed value not optimum in respect converters under variable scenarios. this respect, values different conditions are necessary, which absent conventional scheme. For achieving flexibility, two modifications traditional scheme proposed as, omission regulating loop controlling modulation index current between 0.98 1 VSI. effect, significant multi-benefits obtained (i) reduction stress on switches enhance their life span, (ii) size, cost enhanced lifetime capacitor, (iii) improved efficiency conversion system (iv) total harmonic distortion (THD) maximum injection (PV) connected system. First three benefits produced due required fourth benefit achieved valued (between 1). Both simulation experimental studies verify superior with help logic conditions. Derived mathematical condition interplay amount factors (unity leading) provides insight approach.