Question

Question 3 (10 Marks) Sketch an I-V curve for a photovoltaic module. On it show the short circuit current, the open circuit voltage and the maximum power point. What is the purpose of a maximum power point tracker in a PV system and what are the advantages and disadvantages of using such a device? (5 marks) a. What is the purpose of a battery bank in a renewable energy system? A 2V cell has a C100 capacity of 1090 Ah. Explain clearly what this means. Would you expect the Ci0 capacity to be larger or smaller? Why? If 12 of these cells were connected in series to produce a 24V battery bank, what would be the size of this battery bank in kWh? (5 marks) b.

Answer 1

I-V Cuuse PV cell Pown (w) (PavE) ATM e (hatunut) (v-o) 1 MrP IVawuu (Nax Poven Pointh PVcwuu Vnp Gpln Cenuit valge ( Voc o I O the I-V cUru is the PV CUrue To maximizz po Uiee expraition under all envionmaondal Condidione fmpoe Mee Thacker byvaryiy thu ed ouput lcod Riiodance to gat Rafra Pra INEUT SONLY4HT. Raifvoap u .Thiy do so PVC max powr Advantages hieny Oceny 2mpu nnd uminy ine fant ladwantngea Extna aenans ved a pou lonouuned Batitoy can be wasd to the engy pudued by lart Banz lunfeae Can be uad to pewen deviceg when plart Unabla to apply powen (uke PV Plart od Night Tine) C Ratu Ratr ot uhih bute dichavges alative to max auy na-batoy wil dalian (1090 00A) Fo ot dalivn (1o3ov A') Fon 0-6 miudk (fn gun 1090Ah) mano C)0meam CIO Capity 4 SMALLER wnt C1o (CRade d oixe) 26.160KWH (VI)X Time WH 24 V x (1030 Ah) ( Ampheun damo a Qvieo cinuit, I Runain are kwH