simulated work on vsi and csi and to determine thd for vairious loads

7/23/2019 Simulated Work on Vsi and Csi and to Determine Thd for Vairious Loads

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SIMULATED WORK ON VSI AND CSI AND TO

DETERMINE THD FOR VARIOUS LOADS

Submitted in partial fulfillment of the

requirements for the award of degree of

BACHELOR OF TECHNOLOGY

IN

ELECTRICAL ENGINEERING

Submitted By:

Dharmendra Kumar Pandey

Deependra Rastogi

Chandan Dutta

Dilip Kanogiya

Arjun Jaiswal



Full-Bridge VSI:The figure 1 shows the block diagram of Full-bridge VSI having the parameters as following ->

R1 = 1x10-4

Ohms C1 = 2x10-3

F

R2 = 10 Ohms L = 0.03H

Vs = 230V

Figure 1: Full-Bridge VSI

The figure 2 shows the subsystem of Full-bridge VSI.

Figure 2: Subsystem of Full-Bridge VSI



Figure 3: Parameters of Pulse Generator

Figure 3 represents the window of parameters of Pulse generator. The waveform of Full-Bridge

VSI is shown in figure 4. In the waveform Output current (Io) and Output voltage (Vo) is drawn.

Figure 4: Waveform of Full-Bridge VSI

In figure 5 and 6 the THD of Io And Vo is calculated respectively and the results of THD are as

follow

THD of Io = 16.92%, THD of Vo = 48.76%



Figure 5: THD of Io

Figure 6: THD of Vo



Full-Bridge CSI:

The figure 7 shows the block diagram of Full-bridge CSI having the parameters as following

R1 = 10 Ohms C = 2x10-3

F

L = 0.03H Vs = 230V

Figure 7: Full-bridge CSI

The figure 8 shows the subsystem of Full-bridge CSI.

Figure 8: Subsystem of Full-Bridge VSI

Figure 9 represents the waveform of Full-Bridge CSI and in the waveform Output voltage (Vo)

and Output current (Io) is drawn.



Figure 9: Waveform of Full-Bridge CSI

In figure 10 and 11 the THD of Io and Vo is calculated respectively and the results of THD are asfollow

THD of Io = 48.21%, THD of Vo = 11.51%

Figure 10: THD of Io



Figure 11: THD of Vo



Half-Bridge VSI:

The figure 12 shows the block diagram of Half-Bridge VSI having the parameters as following

R = 10 Ohms L = 0.03H

Vs/2 = 115V C1 = C2 = 2x10-3

F

R1 = R2 = 1x10-4

OhmsThe figure 13 shows the subsystem of Half-Bridge VSI.

Figure 12: Half-Bridge VSI Figure 13: Subsystem of Half-Bridge VSI

Figure 14 represents the window of parameters of Pulse generator. The waveform of Half-

Bridge VSI is shown in figure 15. In the waveform source current (Is) and Output voltage (Vo) is

drawn.



Figure 14: Parameters of Pulse generator

Figure 15: Waveform of Half-Bridge VSI

In figure 16 and 17 the THD of Is and Vo is calculated respectively and the results of THD are as

followTHD of Io = 48.21%, THD of Vo = 11.51%



Half-Bridge VSI with PWM:The figure 18 shows the block diagram of Half-Bridge VSI with PWM having the parameters as

following R = 10 Ohms L = 0.03H

Vs/2 = 115V C1 = C2 = 2x10-3

F

R1 = R2 = 1x10-4

Ohms

Figure 18: Block diagram of Half-Bridge VSI with PWM

Figure 19 represents the window of parameters of Pulse generator.

Figure 19: Window of parameters of Filter Circuit



Figure 20: Window of parameters of Pulse generator

The waveform of Half-bridge VSI with PWM is shown in figure 21. In the waveform Output

current (Io) and Output voltage (Vo) is drawn.

Figure 21: Waveform of Half-bridge VSI with PWM



In figure 22, 23 and 24 the THD of Vo, Io and If is calculated respectively and the results of THD

are as follow

THD of If = 0.73%, THD of Vo = 145.52%

THD of Io = 9.31%


Figure 23: THD of If




Comparisons of THD’s:

Io(%) Vo(%) If (%)Full-Bridge VSI 16.92 48.76 --

Full-Bridge CSI 48.21 11.51 --

Half-Bridge VSI 47.75 17.63 --Half-Bridge VSI with

PWM

9.31 145.52 0.73

INVERTERS THD

simulated work on vsi and csi and to determine thd for vairious loads

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