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(PDF) Performance Analysis of Supercapacitor Integrated PV Fed Multistage Converter with SMC Controlled VSI for Different Load Conditions

ISSN: 2088-8694

Int J Pow Elec & Dri Syst, Vol. 9, No. 2, June 2018 : 757 765

12000

10000

8000

6000

4000

2000

0

Load Power(W)

10000

5000

0

-4000

SC

Power(W)

4000

3000

2000

1000

0

PV

Power(W)

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1

(c) Time

(a) Time

(b) Time

Ref.Pload

Actual Pload 2500.0

2496.0

2492.0

0.5083 0.5084 0.5085 0.5086

zoomed

400

300

200

100

0

100

200

300

400

Load Voltage (V) &

Current (I)

(a)

1.5

1.0

0.5

0

-0.5

-1.0

-1.5 0.22 0.26 0.30 0.34 0.38

0.24 0.28 0.32 0.36 0.40

(b) Time (s)

Vref

0.3240 0.3250 0.3260

316

326

308

Zoomed

Vref Vact

Iact

Figure 11a. Output Waveforms of Load Power, SC Power and PV Power for SMC Controlled VSI

11b. SMC Controlled VSI Output Voltage Waveform Showing Error = 1.2 Volts

The zoomed portions of Figure 10b and Figure 11b present that monitoring of capacitor voltage to its

reference voltage matches completely with Sliding Mode Controller as towards the PI controller in nonlinear

load.The THD efficiency of VSI deploying SMC is 0.25%

4.3. Comprehensive Analysis of Findings

The affect of improved (SMC) controller in the efficiency of multistage converter system is

help in phrases of THD, Verror (max), regular state error in power and peak of basic element of

output voltage is proven in Table 1.

Table 1. Comparative Table

Type of Multistage System

SMC managed VSI for Non-linear load

PI managed VSI for Non-linear load

Steady state error in Power

Fund Component of Voltage

5. CONCLUSION

A novel strategy comprising of the integration of multistage converter system deploying MPPT

with increase converter, PI / SMC controllers with VSI for nonlinear masses has been automotiveried out. The evaluation of

efficiency of PV fed multistage converter system deploying SMC controlled VSI exhibits that both the THD

as nicely as the output-voltage-error are much less in comparability to these obtained with the standard PI

managed VSI below an identical loading situations. Also it is discovered that the steady state error between the

energy demand and provide is very excessive with PI controllers. Thus the SMC Controlled VSI used with MPPT

managed PV era could be a superior option for integrating it to the micro grid methods. Further it was

fascinating to notice that the controllers take due care of satisfactorily integrating the supercapacitor to

compensate the intermittency of PV supply.

REFERENCES

[1] Satish Kumar Gudey, Rajesh Gupta, “Second Order Sliding Mode Control for a Single Phase Voltage Source

Inverter, IET Power Electronics 2014

[2] Abdel-Rahim, N.M., Quaicoe, J.E.: ‘Analysis and design of a multiple feedback loop control strategy for single

phase voltage-source UPS inverters’, IEEE Trans. Power Electron., 1996, 11, (4), pp. 532541

[3] Ortega, R., Loria, A., Nicklasson, P.J., Sira-Ramirez, H.: ‘Passivity-based control of Euler-Lagrange systems’ (New

York, Springer-Verlag, 1998)

[4] Marquez, H.J.: ‘Nonlinear control systems: analysis and design’ (John Wiley & Sons, 2003)

[5] Gudey, S.Ok., Gupta, R.: ‘Sliding mode control in voltage source inverter based higher order circuits’, Int. J.

Electron., 2015, 102, (4), pp. 668689

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