Energy Harvesting and Energy Efficiency by Nicu Bizon Naser Mahdavi Tabatabaei Frede Blaabjerg & Erol Kurt

Author:Nicu Bizon, Naser Mahdavi Tabatabaei, Frede Blaabjerg & Erol Kurt
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

(11.20)

(11.21)

(11.22)

(11.23)

Figure 11.17b shows a generalized schematic of a hybrid system which is composed of a PV group, a wind turbine , a generator (it can be either a water turbine generator, diesel generator, etc.), a battery system (generally for backup in case of no electricity generation), system load(s) and a hybrid charge controller that optimizes the source usages due to power generation of each source. Eliminating the peaks of switching on or off, calculation of power of a direct current system is just multiplying voltage and current in steady state, the power of mono-phase and three-phase systems can be calculated using the Eqs. 11.24–11.26. V LL is the line-to-line voltage, I L is the line current, θ is the angle between the phase voltage and the phase current—the impedance angle. P tp is the real, Q tp is the reactive and S tp is the apparent powers for an uncompensated three-phase system.

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