WEEK-02: SERIES AND PARALLEL INTERCONNECTION

(1)

X

Courses » Design of Photovoltaic Systems

Unit 3 -

WEEK-02: SERIES AND PARALLEL INTERCONNECTION

[email protected] ▼

Announcements Course Ask a Question Progress Mentor FAQ

Course outline

WEEK-00:

Getting Started

WEEK-01: THE PV CELL

WEEK-02:

SERIES AND PARALLEL

INTERCONNECTION Identical cells in series Load line Non-identical cells in series Protecting cells in series Interconnecting modules in series Simulation of cells in series Identical cells in parallel Non-identical cells in parallel Protecting cells in parallel Interconnecting modules Simulation of cells in parallel Practicals - Measuring I-V characteristics Practicals - PV

Due on 2018-08-15, 23:59 IST.

1) 1 point

2) 1 point

WEEK 02 - Assessment

The due date for submitting this assignment has passed.

As per our records you have not submitted this assignment.

Few photovoltaic modules are connected in series-parallel conﬁguration as shown in the ﬁgure below. Each module has an I-V characteristic having the x-axis intercept as 31V and the y-axis intercept as 4.2A. The short circuit current for the series-parallel system shown is

Fig.1

4.2 A 8.4 A 12.6 A 25.2 A

No, the answer is incorrect.

Score: 0

Accepted Answers:

8.4 A

A project of In association with

Funded by

Design of Photovoltaic Systems - - Unit 3 - WEE... https://onlinecourses.nptel.ac.in/noc18_ee35/un...

1 of 4 Thursday 08 November 2018 04:01 PM

(2)

Powered by

Week 03:

ENERGY FROM SUN

Week 04:

INCIDENT ENERGY ESTIMATION

Week 05: SIZING PV

Week 06:

MAXIMUM POWER POINT TRACKING

Week 07: MPPT ALGORITHMS

Week 08:

PV-BATTERY INTERFACES

Week 09:

PELTIER COOLING

Week 10: PV AND WATER PUMPING

WEEK-11:

PV-GRID INTERFACE-I

Week 12:

INTERFACE-II and LIFE CYCLE COSTING

source emulation WEEK-02 Resources Quiz : WEEK 02 - Assessment Week 02 Assessment solutions

3) 1 point

4) 1 point

5) 1 point

For the photovoltaic module conﬁguration shown in Figure.1, the open circuit voltage for the series-parallel system is

93 V 31 V 62 V 186 V

Score: 0

93 V

V1 and V2 are two voltage sources having voltages 11V and 13V respectively. The series resistance of each source is 0.25 ohms.

The circulating current is

Fig. 2

8 A 4 A 2 A 24 A

Score: 0

4 A

With reference to the circuit topology shown in Figure.2, in

order to eliminate the circulating currents for any values of V1 and V2, one can use diode along the path of the source current ﬂow such that

a diode is in series with the voltage source V1

a diode is in series with the voltage source V2

a diode is in series with either of the voltage sources V1 or V2

diodes are in series with both the voltage sources

Score: 0

diodes are in series with both the voltage sources

A photovoltaic panel has four modules connected in series, each module having an open-circuit voltage (Voc ) of 10V and short- circuit current (Isc ) of 2A. What should be the voltage axis intercept of the I-V characteristics of the series system?

10 V

(3)

6) 1 point

7) 1 point

8) 1 point

8 V 40 V 80 V

Score: 0

40 V

A photovoltaic panel has four modules connected in series, each module having an open-circuit voltage (Voc ) of 10V and short- circuit current (Isc ) of 2A. What should be the current axis intercept of the I-V characteristics of the series system?

2 A 8 A 4 A 0.5 A

Score: 0

2 A

Two dissimilar PV cells are connected in parallel (no

protection diodes are incorporated). Let the open-circuit voltage and short-circuit current of one cell be 10V and 2A respectively. Let the open-circuit voltage and short-circuit current of the other cell be 12V and 3A respectively. If Voc and Isc represent the open-circuit voltage and short-circuit current of parallel cell combination, then

Voc < 10V Voc >12V Voc = 10V 10V<Voc<12V

Score: 0

10V<Voc<12V

A PV module has 20 cells connected in series. There are no

protection diodes. Each cell has a Voc of 1V and Isc of 2A. One cell is completely shaded. Across the shaded cell, instead of a bypass diode, a resistor of 10 ohms is connected. The Voc of the PV module is

19 V 20 V 0 V 18 V

Score: 0

(4)

9) 1 point

10) 1 point

19 V

A battery having a voltage of 48V is in series with a 10 ohm resistance. Across the terminals of this series system, a load Ro is connected. Maximum power is transferred to Ro when

10 ohms 20 ohms 5 ohms 24 ohms

Score: 0

10 ohms

A battery having a voltage of 48V is in series with a 10 ohm resistance. Across the terminals of this series system, a load Ro is connected. Maximum power that can be transferred to Ro is

51.2 W 230 W 43.2 W 57.6 W

Score: 0

57.6 W

WEEK-02: SERIES AND PARALLEL INTERCONNECTION

Unit 3 -

WEEK-02: SERIES AND PARALLEL INTERCONNECTION

WEEK 02 - Assessment

Previous Page End